fiber optic communications subsystems, namely, optical amplifiers, Raman pump modules, dispersion-compensation modules, transmitters, receivers, add/drop modules, add/drop multiplexes, optical cross-connect switches, polarization-mode dispersion compensators; circuit packs, namely, optical amplifier circuit packs, dispersion compensation circuit packs, add/drop multiplexer circuit packs, transmitter circuit packs, receiver circuit packs, optical cross-connect switch circuit packs, and polariz...

FIBER OPTIC COMMUNICATION SUBSYSTEMS, NAMELY, RAMAN PUMP MODULES, DISPERSION-COMPENSATION MODULES, TRANSMITTERS, RECEIVERS, ADD DROP MODULES, ADD/DROP MULTIPLEXES, OPTICAL CROSS-CONNECT SWITCHES, POLARIZATION MODE DISPERSION COMPENSATORYS; CIRCUIT PACKS, NAMELY OPTICAL AMPLIFIER CIRCUIT PACKS, DISPERSION COMPENSATION CIRCUIT PACKS, ADD/DROP MULTIPLEXED CIRCUIT PACKS, TRANSMITTER CIRCUIT PACKS, RECEIVER CIRCUIT PACKS, OPTICAL CROSS-CONNECT SWITCH CIRCUIT PACKS, AND POLARIZATION-MODE DISPERSION...

optical amplifiers