Fiber optic networking hardware and software products, namely, isolators, polarization maintaining beam combiners, couplers, multiplexers, demultiplexers, waveguide multiplexers/demultiplexers, interleavers, wavelength lockers, optical amplifiers, optical amplifier arrays, gain blocks, variable optical attenuators, fiber optic power monitors, fiber optic power tap monitors, optical channel monitor modules, tunable optical filters, tunable optical filter arrays, fixed optical add-drop multiple...