Difference between colored optical modules and colorless optical modules

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Colored optical modules support fixed wavelengths.
Colorless optical modules support multiple wavelengths and combine them into white light. Therefore, colorless optical modules support tunable wavelengths.

Other related questions:
What are the differences between a 10GBASE-LRM optical module and other optical modules
Compared with other optical modules, 10GBASE-LRM optical modules have lower cost, lower power, smaller size and provide universal multimode ports. The maximum transmission distance of a 10GBASE-LRM optical module is up to 220 m. A 10GBASE-LRM optical module cannot interoperate with other types of optical modules.

Differences between eSFP and SFP optical modules
SFP is a small form-factor pluggable module and eSFP is an enhanced small form-factor pluggable module. There is no difference between their major functions and services. They are interchangeable as long as they have the same optical power, sensitivity, and distance. The difference is that the eSFP optical module provides more extra functions than the SFP optical module. For example, the eSFP optical module supports optical power monitoring but the SFP optical module does not support optical power monitoring.

What are the differences between 40G-SR and 40G-iSR optical modules
40G-SR and 40G-iSR optical modules provide similar features and can communicate with each other. They differ in the maximum transmit power. A 40G-iSR optical module has lower maximum transmit power than a 40G-SR optical module.

Compared to 40G-SR optical modules, 40G-iSR optical modules are more suitable for connecting to four 10GE-SR optical modules when 40GE ports are split into 10GE ports.


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