Optical pulse generator and optical pulse testing instrument...

Optical pump unit for an optical amplifier

Optical receiver apparatus

Optical receiver having a function for suppressing useless inten

Optical receiver having a function for suppressing useless inten

Optical receiver with extended dynamic range

Optical repeater

Optical repeater having independently controllable...

Optical repeater having redundancy

Optical repeaters

Optical signal amplification apparatus and an optical fiber tran

Optical signal amplifier

Optical signal amplifier glasses

Optical signal amplifying circuit

Optical signal amplifying circuit

Optical signal repeating and amplifying device and optical...

Optical signal transmission apparatus including reflective...

Optical spectrum analyzer and method for controlling output of o

Optical surge preventing method and system for use with or in a

Optical system for amplifying signal light