[OPTICAL REVIEW Vol. 5, No. 6 (1998) 331-333]

Bit-rate Flexible Picosecond Pulse Width Conversion with All-optical Mono-stable Multivibrator Laser Diode

Koji NONAKA, Hidehiko TAKARA, Atsushi TAKADA, Kentaro UCHIYAMA and Yoshiaki YAMABAYASHI

NTT Optical Network Systems Laboratories, 1-1, Hikari-no-oka, Yokosuka, Kanagawa, 239-0847 Japan

(Received August 11, 1998; Accepted September 5, 1998)

An optical mono-stable multivibrator laser diode (MM-LD) is realized by using a multi-electrode distributed feedback laser diode. All-optical pulse-width conversion of ultra-short pulses to non-return-to-zero (NRZ) is achieved using an MM-LD. The MM-LD is adopted for a wide range of bit-rates between 2-10 Gbit/s by tuning the DC bias. Data format transformation from 10-Gbit/s return-to-zero optical signals to NRZ optical-signals is achieved with error free operation. Converted optical signals, which have a narrower spectral bandwidth and lower peak power than when input, are transmitted using a 1.3-mm zero dispersion fiber (1.3l0-SMF).

Key words : Pulse width Conversion, Optical mono-stable multivibrator, Multi-electrode DFB laser diode, RZ to NRZ Data format transformation from 10-Gbit/s optical-signals, 1.3l0-SMF transmission