Title :
Substantial reduction of dynamic wavelength chirp of 2 Gbit/s pseudorandom optical signal using three-contact InGaAsP/InP multi-quantum-well distributed-feedback laser
Author :
Griffin, P.S. ; Williams, K.A. ; White, Ian H. ; Fice, Martyn J.
Author_Institution :
Sch. of Phys., Bath Univ., UK
Abstract :
Linewidths as low as 0.08 nm (-20 dB) have been achieved for a three-contact multi-quantum-well (MQW) distributed-feedback (DFB) laser subject to NRZ pseudorandom modulation at 2 Gbit/s. These linewidths are substantially narrower than those observed using equivalent single-contact devices, the improved spectral performance being achieved by using the central device region to control the wavelength of the light generated.
Keywords :
III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; optical modulation; semiconductor lasers; spectral line breadth; 2 Gbit/s; NRZ pseudorandom modulation; central device region; dynamic wavelength chirp; linewidths; multi-quantum-well distributed-feedback laser; pseudorandom optical signal; spectral performance; three-contact device;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921310
