<\/span><\/h2>\nDWDM optical wavelength<\/b><\/strong>\u00a0refers to light in the 1550nm range with a standardized wavelength. It is typically used in OTN networks for long-distance transmission.<\/p>\nRegular optical wavelength<\/b><\/strong>\u00a0refers to light in the 850nm and 1310nm ranges without a standardized wavelength. It is typically used in SDH, IP, and other networks for short-distance transmission.<\/p>\nTo put it simply, DWDM and Regular optical wavelengths are not specific signals but rather a range of signals within a certain wavelength range. Some signals have a standardized wavelength while others do not.<\/p>\n
![\"What](\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/05\/What-are-DWDM-and-Regular-Optical-Wavelengths.png\")
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What is an optical signal with and without a standard optical wavelength?<\/p>\n
![\"optical](\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/05\/optical-signal-with-standard-wavelength.png\")
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\n- Standard optical wavelength means that the optical signal fluctuates in a small range around some central optical wavelength and is a single optical wavelength of light.<\/li>\n
- No standard optical wavelength means that the optical signal fluctuates within a certain range, a wider range, without a central optical wavelength.<\/li>\n<\/ul>\n
To provide a better understanding of DWDM and Regular wavelengths, consider the following analogy:<\/p>\n
![\"DWDM](\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/05\/DWDM-and-Regular.png\")
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DWDM wavelengths are like sniper rifles that fire one bullet at a time, causing a single bullet hole in the target, which represents a light signal with a standard wavelength.<\/p>\n
Regular wavelengths are like shotguns that fire multiple bullets simultaneously, causing multiple bullet holes in the target, which represent light signals without a standard wavelength.<\/p>\n
<\/span>Who Provides DWDM and Regular Wavelengths?<\/b><\/strong><\/span><\/span><\/h2>\nOptical transceiver modules provide DWDM and Regular wavelengths.<\/p>\n
\n- DWDM modules transmit and receive colored light signals with a standard center wavelength.<\/li>\n
- Regular modules transmit and receive Regular light signals without a center wavelength.<\/li>\n<\/ul>\n
In practical network devices, SDH\/IP equipment on the customer side transmits Regular light signals through Regular modules into the OTN network, where the OTN equipment converts the Regular light to DWDM light using a DWDM module for transmission.<\/p>\n
![\"Optical](\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/05\/Optical-transceiver-modules-provide-DWDM-and-Regular-wavelengths..png\")
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<\/span>Conclusion<\/b><\/strong><\/span><\/span><\/h2>\nDWDM and Regular optical wavelengths are widely used in optical communication today, enabling efficient handling and transmission of data over optical fibers for short and long-distance scenarios in various networks, contributing to the rapid development of optical communication networks.<\/p>\n
![\"DWDM](\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/05\/DWDM-and-Regular-optical-wavelengths-are-widely-used-in-optical-communication.png\")
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