Optical WDM (wavelength division multiplexing) transmission syst

Optical WDM network having an efficient use of wavelengths...

Optical WDM ring network

Optical wireless communication method and apparatus

Optical wireless communication method and apparatus

Optical wireless communication system

Optical wireless data communication system, and transmitter...

Optical wireless data transmission system and optical wireless d

Optical-fiber light amplifier

Optical-fibre telecommunications line with protection device for

Optical-frequency communications system for aircraft

Optical-frequency-stabilized light source

Optical-interference microphone

Optical-signal transmission apparatus and method, and signal...

Optical-signal transmitting apparatus, optical-signal receiving

Optical-signal/electric-signal converting device

Optical-wavelength interchanger element and optical-wavelength i

Optically amplified back-up receiver

Optically amplified transmission systems

Optically amplified transmission systems