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FR vs ER
By C-LIGHT Marketing丨Feb 17, 2026
FR spans 2 kilometers over CWDM wavelengths on a duplex LC pair. ER spans 30 to 40 kilometers with higher launch power, greater receiver sensitivity, and tighter wavelength control.
FR vs ZR
By C-LIGHT Marketing丨Feb 16, 2026
FR and ZR bracket the single-mode pluggable landscape. FR covers 2 kilometers over CWDM on dedicated fiber. ZR covers 80 to 120 kilometers over coherent DWDM on amplified line systems.
2km vs 500m Optical Interconnect
By C-LIGHT Marketing丨Feb 15, 2026
500 m optical interconnects use parallel single-mode lanes and MPO connectors. 2 km interconnects use CWDM wavelengths and duplex LC.
2km vs 10km Data Center Interconnect
By C-LIGHT Marketing丨Feb 14, 2026
2 km DCI links use CWDM over duplex LC for campus building-to-building connectivity. 10 km DCI links use LAN-WDM or a single 1310 nm wavelength for metro data center interconnect.
2km vs 40 km Data Center Interconnect
By C-LIGHT Marketing丨Feb 13, 2026
2km DCI uses CWDM over duplex LC for campus building-to-building links. 40km DCI uses LAN-WDM or 1550nm with higher launch power and tighter wavelength control for metro and regional interconnect.
10km vs 40km Data Center Interconnect
By C-LIGHT Marketing丨Feb 12, 2026
10km DCI uses LAN-WDM or a single 1310 nm wavelength over duplex LC for metro data center interconnect. 40km DCI uses LAN-WDM or 1550 nm with higher launch power and tighter wavelength control for regional interconnect.
40km vs 80km Data Center Interconnect
By C-LIGHT Marketing丨Feb 11, 2026
40km DCI marks the end of direct-detect PAM4 and the limit of ER interfaces. 80km DCI marks the beginning of coherent detection with 400ZR and 800ZR on amplified DWDM line systems.
80km vs 120km Coherent Optics
By C-LIGHT Marketing丨Feb 10, 2026
80km and 120km are the two standard reach tiers for coherent pluggable optics. 80km represents the baseline 400ZR specification. 120km represents the extended-reach 400ZR+ and OpenZR+ variants.
120km vs 200km Coherent Optics
By C-LIGHT Marketing丨Feb 9, 2026
120km and 200km are two reach tiers for coherent pluggable optics.120km sits at the upper end of the OIF 400ZR baseline. 200km requires stronger FEC, lower-noise amplification, or shorter spans.
10G Copper vs Fiber
By C-LIGHT Marketing丨Feb 8, 2026
Compare 10G Copper vs Fiber: DAC, AOC, and 10GBASE-T SFP+ modules explained. Find the best short-reach data center interconnect solution.
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