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SR vs DR
By C-LIGHT Marketing丨Feb 27, 2026
SR and DR are two optical reach classes for parallel single-lane and multi-lane transceivers. SR uses multimode fiber at 850 nm for short-reach intra-rack links. DR uses single-mode fiber at 1310 nm for 500-meter parallel single-mode links.
DR vs FR
By C-LIGHT Marketing丨Feb 26, 2026
DR and FR are two optical reach classes for single-mode fiber transceivers. DR uses parallel single-mode lanes at 1310 nm for 500-meter links. FR uses CWDM wavelengths at 1310 nm for 2-kilometer links
DR vs LR
By C-LIGHT Marketing丨Feb 25, 2026
DR and LR are two optical reach classes for single-mode fiber transceivers. DR uses parallel single-mode lanes at 1310 nm for 500-meter links. LR uses LAN-WDM or a single 1310 nm wavelength for 10-kilometer links
FR vs LR
By C-LIGHT Marketing丨Feb 24, 2026
FR and LR are two optical reach classes for single-mode fiber transceivers. FR uses CWDM wavelengths at 1310 nm for 2-kilometer links. LR uses LAN-WDM or a single 1310 nm wavelength for 10-kilometer links.
SR vs FR
By C-LIGHT Marketing丨Feb 23, 2026
SR and FR are two optical reach classes for Ethernet transceivers. SR uses multimode fiber at 850 nm for 100-meter links. FR uses single-mode fiber at 1310 nm for 2-kilometer links.
SR vs LR
By C-LIGHT Marketing丨Feb 22, 2026
SR and LR are two optical reach classes for Ethernet transceivers. SR uses multimode fiber at 850 nm for 100-meter links. LR uses single-mode fiber at 1310 nm for 10-kilometer links.
DR vs ER
By C-LIGHT Marketing丨Feb 21, 2026
DR reaches 500 meters over parallel single-mode lanes with MPO connectors. ER reaches 30 to 40 kilometers over LAN-WDM or 1550 nm wavelengths with duplex LC.
ER vs LR
By C-LIGHT Marketing丨Feb 20, 2026
LR reaches 10 kilometers over LAN-WDM wavelengths on a duplex LC pair. ER reaches 30 to 40 kilometers with higher launch power, greater receiver sensitivity, and the option of 1550 nm amplification.
LR vs ZR
By C-LIGHT Marketing丨Feb 19, 2026
LR delivers 10 km over LAN-WDM wavelengths with direct-detect optics. ZR delivers 80 to 120 km over DWDM with coherent detection, DSP, and a tunable laser.
ER vs ZR
By C-LIGHT Marketing丨Feb 18, 2026
ER reaches 30 to 40 kilometers with direct-detect PAM4 and fixed-wavelength lasers. ZR reaches 80 to 120 kilometers with coherent detection, tunable lasers, and DWDM line systems.
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