Data communication unit using light-emitting diode for data...

Data compression apparatus and method therefor

Data format for high bit rate WDM transmission

Data transmission apparatus, photoelectric conversion...

Differential M phase-shift modulator

Digital synthesis of readily compensated optical signals

Direct detection differential polarization-phase-shift...

Direct electrical-to-optical conversion and light modulation...

Direct-detection optical differential 8-level phase shift...

Direct-sequence spread-spectrum...

Directly modulated laser optical transmission system

Directly modulated laser optical transmission system with...

Dispersion compensating circuits for optical transmission...

Dispersion compensation quantity setting method, receiving...

Dispersion compensation quantity setting method, receiving...

Dispersion tolerant optical data transmitter

Dispersion tolerant optical system and method

Distortion compensation circuit including one or more phase...

DQPSK transmitter with parallel precoder and high-speed...

Drive control apparatus and drive control method for optical...