Finisar’s 25G-class SFP/SFP28 lineup looks deceptively uniform from the outside — most of these modules share the same duplex LC connector, the same 850nm VCSEL or 1310nm laser, and similar part-number prefixes. But the differences between them — reach, FEC dependency, single-rate vs. dual-rate, Ethernet vs. Fibre Channel — matter a great deal once you’re […]