Optical network unit of ethernet passive optical network and...

Optical output power automatic attenuation circuit for...

Optical path cross-connect and optical wavelength...

Optical performance monitor using co-located switchable...

Optical performance monitoring apparatus for a WDM optical...

Optical performance monitoring device

Optical phase modulator with monitoring structure

Optical polarization division multiplexing in optical...

Optical power management in an optical network

Optical power measurement apparatus and optical power...

Optical power transient monitor

Optical pulse characterization using phase modulation

Optical receiver decision threshold tuning apparatus and method

Optical sampling using intermediate second harmonic...

Optical sender, terminal device, and optical communication...

Optical signal judging system and optical signal judging method

Optical signal monitoring system and optical signal...

Optical signal quality monitoring apparatus and method

Optical signal quality selection system

Optical signal quality supervisory device