FIF-S-55-080-R Transceiver Module

FIF-S-55-080-R Overview

The FIF‑S‑55‑080‑R is an optoelectronic accessory component from Finisar (now part of Coherent) used in fiber‑optic communication systems, classified as a free‑space optical isolator/spacer designed around the 1550 nm wavelength band. Rather than being a full, hot‑pluggable transceiver module like SFP or QSFP optics, it serves as a support optical element within optical assemblies, helping to manage and condition light in free‑space segments and improve signal integrity in high‑speed optical links or test setups. Typically compliant with RoHS and built for integration with related optics and test equipment, this part is used by engineers in fiber‑optic development, diagnostics, and specialized networking applications where precise optical path management at 1550 nm is required.