{"id":7264,"date":"2024-02-01T01:52:45","date_gmt":"2024-02-01T01:52:45","guid":{"rendered":"https:\/\/www.fibermall.com\/blog\/?p=7264"},"modified":"2024-03-06T08:20:51","modified_gmt":"2024-03-06T08:20:51","slug":"why-do-ai-data-centers-need-800g-optical-modules","status":"publish","type":"post","link":"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm","title":{"rendered":"Why do AI Data Centers Need 800G Optical Modules?"},"content":{"rendered":"\n<p>In today\u2019s fast-paced world, the demand for high-speed data transmission has reached unprecedented levels. AI applications and large models have made computing power a key infrastructure for the AI industry. As the need for faster communication increases, high-speed optical modules have become an essential component of artificial intelligence servers. This article explores the evolution of 800G optical modules and their huge potential in the AI era.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm\/#The_Evolution_of_800G_Optical_Modules\" >The Evolution of 800G Optical Modules<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm\/#800G_Optical_Module_Packaging\" >800G Optical Module Packaging<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm\/#Types_of_800G_Optical_Modules\" >Types of 800G Optical Modules<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm\/#The_impact_of_Al_on_the_deployment_of_800G_optical_modules\" >The impact of Al on the deployment of 800G optical modules<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm\/#Related_Posts\" >Related Posts<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-the-evolution-of-800g-optical-modules\"><span class=\"ez-toc-section\" id=\"The_Evolution_of_800G_Optical_Modules\"><\/span><strong>The Evolution of 800G Optical Modules<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Optical modules perform the task of converting optical and electrical signals in network connections, responsible for converting electrical signals into optical signals at the transmitting end, and then converting optical signals into electrical signals at the receiving end after transmission through optical fibers. With the development and integration of optoelectronic devices, their performance and transmission bandwidth have been continuously improved, and optical modules require higher transmission rates and smaller sizes to adapt to different usage scenarios. The packaging methods have also evolved, and smaller packaging and power consumption means that optical modules have a higher port density on switches, and the same power can drive more optical modules.<\/p>\n\n\n\n<p><strong>Increasing bandwidth demand<\/strong><strong><\/strong><\/p>\n\n\n\n<p>The growth of bandwidth demand has had a significant impact on high-speed optical modules. With the emergence of new technologies and the demand for large-scale data transmission, traditional 100G, 200G, and 400G optical modules can no longer fully meet market demand. To meet the growing bandwidth demand, 800G optical modules are becoming a trend.<\/p>\n\n\n\n<p><strong>The growth of LPO technology<\/strong><strong><\/strong><\/p>\n\n\n\n<p>In the 800G optical module era, Linear-drive Pluggable Optics (LPO) technology stands out. LPO uses linear analog components in the data link, without the need for complex CDR or DSP design. Compared with DSP solutions, LPO greatly reduces power consumption and latency and is very suitable for the short-distance, high-bandwidth, low-power, and low-latency data connection requirements of AI data centers. As cloud service providers expand their computing resources, LPO solutions, including 800G LPO, are expected to occupy an important market share.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-800g-optical-module-packaging\"><span class=\"ez-toc-section\" id=\"800G_Optical_Module_Packaging\"><\/span><strong>800G Optical Module Packaging <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>With the continuous advancement of technology, the packaging form of optical modules has undergone significant changes. From the early GBIC packaging to the smaller SFP packaging, to the current <a href=\"https:\/\/www.fibermall.com\/store-21972-800g-qsfp-dd-osfp.htm?ca=1112&amp;cv=7229\" target=\"_blank\" rel=\"noreferrer noopener\">800G QSFP-DD<\/a> and OSFP packaging. This development trend not only reflects the continuous improvement of optical modules in terms of rate but also shows their progress toward miniaturization and hot plugging. The application scenarios of 800G optical modules are increasingly diverse, covering multiple fields such as Ethernet, CWDM\/DWDM, connectors, fiber channels, and wired\/wireless access.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-QSFP-DD-and-OSFP-sizes-1024x567.png\" alt=\"Comparison of QSFP-DD and OSFP sizes\" class=\"wp-image-7266\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-QSFP-DD-and-OSFP-sizes-1024x567.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-QSFP-DD-and-OSFP-sizes-300x166.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-QSFP-DD-and-OSFP-sizes-768x425.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-QSFP-DD-and-OSFP-sizes.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">Comparison of QSFP-DD and OSFP sizes<\/p>\n\n\n\n<p><strong>800G QSFP-DD specifications<\/strong><strong><\/strong><\/p>\n\n\n\n<p>Double-density four-channel small pluggable high-speed module. QSFP-DD is the preferred packaging for 800G optical modules, enabling data centers to grow efficiently and expand cloud capacity as needed. QSFP-DD modules use an 8-channel electrical interface, with a rate of up to 25Gb\/s (NRZ modulation) or 50Gb\/s (PAM4 modulation) per channel, providing an aggregate solution of up to 200Gb\/s or 400Gb\/s.<\/p>\n\n\n\n<p><strong>The advantages of 800G QSFP-DD<\/strong><strong><\/strong><\/p>\n\n\n\n<p>It has downward compatibility and is compatible with QSFP+\/QSFP28\/QSFP56 QSFP packages.<\/p>\n\n\n\n<p>It adopts a 2\u00d71 stacked integrated cage connector, which can support single-height and double-height cage connector systems.<\/p>\n\n\n\n<p>It can achieve a thermal capacity of at least 12 watts per module through SMT connectors and 1xN cages. Higher thermal capacity can reduce the cooling function requirements of optical modules, thereby reducing some unnecessary costs.<\/p>\n\n\n\n<p>In the design of QSFP-DD, the MSA working group fully considered the flexibility of user use, adopted ASIC design, supported multiple interface rates, and was downward compatible (compatible with QSFP+\/QSFP28), thereby reducing port costs and equipment deployment costs.<\/p>\n\n\n\n<p><strong>800G OSFP shape specifications<\/strong><strong><\/strong><\/p>\n\n\n\n<p>OSFP is a new type of optical module, much smaller than CFP8, but slightly larger than QSFP-DD, with 8 high-speed electrical channels, and still supports 32 OSFP ports on each 1U front panel, with integrated heat sinks to greatly improve heat dissipation performance.<\/p>\n\n\n\n<p><strong>The advantages of 800G OSFP<\/strong><strong><\/strong><\/p>\n\n\n\n<p>The OSFP module is designed for 8 channels, directly supporting a total throughput of up to 800G, thereby achieving higher bandwidth density.<\/p>\n\n\n\n<p>Because the OSFP package supports more channels and higher data transmission rates, it can provide higher performance and longer transmission distance.<\/p>\n\n\n\n<p>The OSFP module has an excellent heat dissipation design and can handle higher power consumption.<\/p>\n\n\n\n<p>OSFP is designed to support higher rates in the future. Due to the larger size of the OSFP module, it is possible to support higher power consumption, thereby supporting higher rates, such as 1.6T or higher.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-800G-optical-module-size-1024x425.png\" alt=\"Comparison of 800G optical module size\" class=\"wp-image-7267\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-800G-optical-module-size-1024x425.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-800G-optical-module-size-300x124.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-800G-optical-module-size-768x319.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/Comparison-of-800G-optical-module-size.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Comparison of 800G optical module size<\/p>\n\n\n\n<p>QSFP-DD is usually the preferred choice in telecom applications, while OSFP is more suitable for data center environments. The main differences between them are:<\/p>\n\n\n\n<p>Size: OSFP is slightly larger<\/p>\n\n\n\n<p>Power consumption: OSFP\u2019s power consumption is slightly higher than QSFP-DD.<\/p>\n\n\n\n<p>Compatibility: QSFP-DD is perfectly compatible with QSFP28 and QSFP+, while OSFP is not compatible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-types-of-800g-optical-modules\"><span class=\"ez-toc-section\" id=\"Types_of_800G_Optical_Modules\"><\/span><strong>Types of 800G Optical Modules <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>800G=8x100G=4x200G, so according to the single-channel rate, it can be divided into two types, namely single-channel 100G and 200G. The corresponding architectures are shown in the figure below. The single-channel 100G optical module can be quickly implemented, while 200G has higher requirements for optical devices. Since the maximum rate supported by the current electrical interface is 112Gbps PAM4, a gearbox is required for the single-channel 200G.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/8x100GbE-2x200GbE-1024x495.png\" alt=\"8x100GbE, 2x200GbE\" class=\"wp-image-7268\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/8x100GbE-2x200GbE-1024x495.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/8x100GbE-2x200GbE-300x145.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/8x100GbE-2x200GbE-768x371.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/8x100GbE-2x200GbE.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>For the multimode case, there are mainly two standards for 800G optical modules, corresponding to a transmission distance less than 100m.<\/p>\n\n\n\n<p><strong>800G SR8 <\/strong><strong><\/strong><\/p>\n\n\n\n<p>It adopts the VCSEL solution, with a wavelength of 850nm, a single-channel rate of 100Gbps PAM4, and requires 16 fibers. This can be regarded as an upgraded version of 400G SR4, with the number of channels doubled. Its optical interface is MPO-16 or 2 rows of MPO-12, as shown in the figure below. 800G SR8 optical modules are generally used for 800G Ethernet, data center links, or 800G-800G interconnection.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR8-1024x320.png\" alt=\"800G SR8\" class=\"wp-image-7269\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR8-1024x320.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR8-300x94.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR8-768x240.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR8.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">MPO-16 and Dual MPO-12<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe title=\"How to Use 800G OSFP SR8(MMA4Z00-NS) on NVIDIA Quantum-2 Switches | FiberMall\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/jvrQe4OTat4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p>800G SR4<\/p>\n\n\n\n<p>This solution adopts 850nm\/910nm wavelength, bidirectional transmission, and uses DeMux in the module to separate the two wavelengths. The single-channel rate is 100Gbps PAM4, and 8 fibers are required. Compared with SR8, the number of fibers in this solution is reduced by half. Its block diagram is shown in the figure below:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR4-1024x480.png\" alt=\"800G SR4\" class=\"wp-image-7270\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR4-1024x480.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR4-300x141.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR4-768x360.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-SR4.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>800G PAM4 CDR<\/p>\n\n\n\n<p>Its fiber interface is shown in the figure below, using the MPO-12 interface.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-PAM4-CDR-1024x264.png\" alt=\"800G PAM4 CDR\" class=\"wp-image-7271\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-PAM4-CDR-1024x264.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-PAM4-CDR-300x77.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-PAM4-CDR-768x198.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-PAM4-CDR.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>There are various standards for 800G optical modules for single-mode applications:<\/p>\n\n\n\n<p><strong>800G DR8, 800G 2xDR4, and 800G PSM8 <\/strong><strong><\/strong><\/p>\n\n\n\n<p>These three standards have similar internal architectures, all with 8 transmitters and 8 receivers, and a single-channel rate of 100Gbps, requiring 16 optical fibers. <a href=\"https:\/\/www.fibermall.com\/sale-460320-nvidia-mms4x00-nm-2x400g-osfp-dr8.htm\" target=\"_blank\" rel=\"noreferrer noopener\">800G DR8<\/a> optical module adopts 100G PAM4 and 8-channel single-mode parallel technology, and the transmission distance through single-mode optical fiber can reach 500m. <\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe title=\"How to Use 800G OSFP DR8(MMS4X00-NM) on NVIDIA Quantum-2 Switches | FiberMall\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/1AfqOaU1DVg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p>It is usually used for data center, 800G-800G, 800G-400G, and 800G-100G interconnection. 800G PSM8 adopts CWDM technology, with 8 optical channels, each with a transmission rate of 100Gbps, supporting a transmission distance of 100m. It is very suitable for long-distance transmission and fiber resource sharing.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-DR8-800G-2xDR4-and-800G-PSM8-1024x496.png\" alt=\"800G DR8, 800G 2xDR4, and 800G PSM8\" class=\"wp-image-7272\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-DR8-800G-2xDR4-and-800G-PSM8-1024x496.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-DR8-800G-2xDR4-and-800G-PSM8-300x145.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-DR8-800G-2xDR4-and-800G-PSM8-768x372.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-DR8-800G-2xDR4-and-800G-PSM8.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>800G 2DR4 refers to 2 \u201c400G-DR4\u201d&nbsp;interfaces. The optical interface of 2DR4 is 2 MPO-12, as shown in the figure below. It can be interconnected with 400G DR4 optical module without fiber branch cable, supporting 500m transmission distance, which is convenient for data center upgrades. The optical interface of PSM8 and DR8 is MPO-16.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/dual-mpo-12.png\" alt=\"dual mpo-12\" class=\"wp-image-7273\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/dual-mpo-12.png 700w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/dual-mpo-12-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p><strong>800G 2xFR4 and 2xLR4 <\/strong><strong><\/strong><\/p>\n\n\n\n<p>These two standards have similar internal structures, both containing 4 wavelengths and a single-channel rate of 100Gbps. By using Mux to reduce the number of optical fibers, 4 optical fibers are required, as shown in the figure below.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-2xFR4-and-2xLR4-1024x705.png\" alt=\"800G 2xFR4 and 2xLR4\" class=\"wp-image-7274\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-2xFR4-and-2xLR4-1024x705.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-2xFR4-and-2xLR4-300x207.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-2xFR4-and-2xLR4-768x529.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-2xFR4-and-2xLR4.png 1046w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>These two solutions are upgrades of 400G FR4 and LR4 optical modules, using 1271\/1291\/1311\/1331nm CWDM4 wavelengths. 2xFR4 supports a transmission distance of 2km, and 2xLR4 supports a transmission distance of 10km. Their optical interfaces adopt dual CS or dual duplex LC interfaces.<\/p>\n\n\n\n<p><strong>800G FR4<\/strong><strong><\/strong><\/p>\n\n\n\n<p>This solution uses four wavelengths, with a single-channel rate of 200Gbps, requiring two optical fibers to support a transmission distance of 2km, as shown in the figure below.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR4-1024x479.png\" alt=\"800G FR4\" class=\"wp-image-7275\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR4-1024x479.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR4-300x140.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR4-768x359.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR4.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>It adopts a duplex LC optical interface, as shown in the figure below.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/duplex-lc-1024x588.png\" alt=\"duplex lc\" class=\"wp-image-7276\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/duplex-lc-1024x588.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/duplex-lc-300x172.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/duplex-lc-768x441.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/duplex-lc.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>800G FR8<\/p>\n\n\n\n<p>This solution uses 8 wavelengths, each with a rate of 100Gbps, requiring two optical fibers to support a transmission distance of 2km, as shown in the figure below. The eight wavelength channels are 1271\/1291\/1311\/1331\/1351\/1371\/1391\/1411nm respectively.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR8.png\" alt=\"800G FR8\" class=\"wp-image-7277\" style=\"width:800px\" width=\"800\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR8.png 986w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR8-300x183.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2024\/03\/800G-FR8-768x467.png 768w\" sizes=\"(max-width: 986px) 100vw, 986px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-impact-of-al-on-the-deployment-of-800g-optical-modules\"><span class=\"ez-toc-section\" id=\"The_impact_of_Al_on_the_deployment_of_800G_optical_modules\"><\/span><strong>The impact of Al on the deployment of 800G optical modules <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Why is 800G more important than 400G for AI servers?<\/p>\n\n\n\n<p>First of all, AI servers require high data transmission rate and low latency and need rack-top switches that match the underlying bandwidth. These switches may also need latency redundancy, which requires high-speed optical modules. For example, NVIDIA DGX H100 server is equipped with 8xH100 GPU modules, each of which requires 2x200G optical modules. Therefore, each server needs at least 16x<a href=\"https:\/\/www.fibermall.com\/store-21996-200g-hdr-infiniband.htm\" target=\"_blank\" rel=\"noreferrer noopener\">200G modules<\/a>, and the corresponding rack-top switch port needs at least 4x<a href=\"https:\/\/www.fibermall.com\/store-21994-800g-ndr-infiniband.htm\" target=\"_blank\" rel=\"noreferrer noopener\">800G<\/a>.<\/p>\n\n\n\n<p>Secondly, 800G optical chips have higher cost efficiency and economic benefits. They use 100G EML chips, while 200G\/400G use 50G optical chips. Data shows that at the same rate, the cost of a 100G optical chip is 30% lower than that of two 50G optical chips. Nevertheless,<a href=\"https:\/\/www.fibermall.com\/store-21995-400g-ndr-infiniband.htm\" target=\"_blank\" rel=\"noreferrer noopener\"> 400G optical modules<\/a> still have important significance in the industry.<\/p>\n\n\n\n<p>Although they may not be able to match the speed of 800G optical modules, they significantly improve the bandwidth compared to old technologies, and are the preferred solution for many enterprises. In addition, some applications may not need all the features of 800G Ethernet, and 400G <a href=\"https:\/\/www.fibermall.com\/store-21999-ethernet-transceivers-cables.htm\" target=\"_blank\" rel=\"noreferrer noopener\">Ethernet<\/a> is more practical for them. With the increasing demand for faster and more efficient data transmission, the era of 800G optical modules has arrived.<\/p>\n\n\n\n<p>With their excellent bandwidth capabilities and the advancement of LPO technology, 800G optical modules will completely change the artificial intelligence industry and data center.<\/p>\n<style>\r\n\r\n        .lwrp.link-whisper-related-posts{\r\n            \r\n            margin-top: 40px;\nmargin-bottom: 30px;\r\n        }\r\n        .lwrp .lwrp-title{\r\n            \r\n            \r\n        }\r\n        .lwrp .lwrp-description{\r\n            \r\n            \r\n\r\n        }\r\n        .lwrp .lwrp-list-container{\r\n        }\r\n        .lwrp .lwrp-list-multi-container{\r\n            display: flex;\r\n        }\r\n        .lwrp .lwrp-list-double{\r\n            width: 48%;\r\n        }\r\n        .lwrp .lwrp-list-triple{\r\n            width: 32%;\r\n        }\r\n        .lwrp .lwrp-list-row-container{\r\n            display: flex;\r\n            justify-content: space-between;\r\n        }\r\n        .lwrp .lwrp-list-row-container .lwrp-list-item{\r\n            width: calc(100% - 20px);\r\n        }\r\n        .lwrp .lwrp-list-item:not(.lwrp-no-posts-message-item){\r\n            \r\n            list-style: decimal;\r\n        }\r\n        .lwrp .lwrp-list-item img{\r\n            max-width: 100%;\r\n            height: auto;\r\n        }\r\n        .lwrp .lwrp-list-item.lwrp-empty-list-item{\r\n            background: initial !important;\r\n        }\r\n        .lwrp .lwrp-list-item .lwrp-list-link .lwrp-list-link-title-text,\r\n        .lwrp .lwrp-list-item .lwrp-list-no-posts-message{\r\n            \r\n                \r\n        }\r\n        @media screen and (max-width: 480px) {\r\n            .lwrp.link-whisper-related-posts{\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-title{\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-description{\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-list-multi-container{\r\n                flex-direction: column;\r\n            }\r\n            .lwrp .lwrp-list-multi-container ul.lwrp-list{\r\n                margin-top: 0px;\r\n                margin-bottom: 0px;\r\n                padding-top: 0px;\r\n                padding-bottom: 0px;\r\n            }\r\n            .lwrp .lwrp-list-double,\r\n            .lwrp .lwrp-list-triple{\r\n                width: 100%;\r\n            }\r\n            .lwrp .lwrp-list-row-container{\r\n                justify-content: initial;\r\n                flex-direction: column;\r\n            }\r\n            .lwrp .lwrp-list-row-container .lwrp-list-item{\r\n                width: 100%;\r\n            }\r\n            .lwrp .lwrp-list-item:not(.lwrp-no-posts-message-item){\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-list-item .lwrp-list-link .lwrp-list-link-title-text,\r\n            .lwrp .lwrp-list-item .lwrp-list-no-posts-message{\r\n                \r\n                    \r\n            }\r\n        }<\/style>\r\n<div id=\"link-whisper-related-posts-widget\" class=\"link-whisper-related-posts lwrp\">\r\n            <h3 class=\"lwrp-title\">Related Posts<\/h3>    \r\n        <div class=\"lwrp-list-container\">\r\n                                            <ul class=\"lwrp-list lwrp-list-single\">\r\n                    <li class=\"lwrp-list-item\"><a href=\"https:\/\/www.fibermall.com\/blog\/mpo-tester.htm\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">Everything You Need to Know About MPO Tester for Fiber Optic Testing<\/span><\/a><\/li><li class=\"lwrp-list-item\"><a href=\"https:\/\/www.fibermall.com\/blog\/nvidia-ai-gpu-server-pcie-vs-sxm.htm\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">NVIDIA AI GPU Servers: PCIe vs. SXM<\/span><\/a><\/li><li class=\"lwrp-list-item\"><a href=\"https:\/\/www.fibermall.com\/blog\/nvidia-spectrum-x-network-platform-architecture.htm\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">NVIDIA Spectrum-X Network Platform Architecture Whitepaper<\/span><\/a><\/li><li class=\"lwrp-list-item\"><a href=\"https:\/\/www.fibermall.com\/questions\/what-is-difference-400g-and-200g-dac.htm\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">What is the Difference Between \u201c400G\u201d\u00a0and \u201c200G\u201d\u00a0Breakout DAC?<\/span><\/a><\/li><li class=\"lwrp-list-item\"><a href=\"https:\/\/www.fibermall.com\/blog\/gpu-networking-nvlink-infiniband-roce-ddc.htm\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">GPU Cluster Networking Technology Analysis: NVLink, InfiniBand, ROCE, DDC<\/span><\/a><\/li>                <\/ul>\r\n                        <\/div>\r\n<\/div>","protected":false},"excerpt":{"rendered":"<p>In today\u2019s fast-paced world, the demand for high-speed data transmission has reached unprecedented levels. AI applications and large models have made computing power a key infrastructure for the AI industry. As the need for faster communication increases, high-speed optical modules have become an essential component of artificial intelligence servers. This article explores the evolution of [&hellip;]<\/p>\n","protected":false},"author":227,"featured_media":7279,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"","_wpscppro_dont_share_socialmedia":false,"_wpscppro_custom_social_share_image":0,"_facebook_share_type":"","_twitter_share_type":"","_linkedin_share_type":"","_pinterest_share_type":"","_linkedin_share_type_page":"","_instagram_share_type":"","_medium_share_type":"","_threads_share_type":"","_google_business_share_type":"","_selected_social_profile":[],"_wpsp_enable_custom_social_template":false,"_wpsp_social_scheduling":{"enabled":false,"datetime":null,"platforms":[],"status":"template_only","dateOption":"today","timeOption":"now","customDays":"","customHours":"","customDate":"","customTime":"","schedulingType":"absolute"},"_wpsp_active_default_template":true},"categories":[2,30],"tags":[],"class_list":["post-7264","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-fiber-optic-transceivers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.13 (Yoast SEO v25.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why do AI Data Centers Need 800G Optical Modules? | FiberMall<\/title>\n<meta name=\"description\" content=\"The era of 800G has arrived. This article explores the evolution of 800G optical modules and their huge potential in the AI era.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fibermall.com\/blog\/why-ai-datacenters-need-800g-modules.htm\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why do AI Data Centers Need 800G Optical Modules?\" \/>\n<meta property=\"og:description\" content=\"In today\u2019s fast-paced world, the demand for high-speed data transmission has reached unprecedented levels. 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