S. Ogita et al., STRAINED-LAYER MULTI-QUANTUM-WELL LASER-DIODE FOR OPTICAL-FIBER TRANSMISSION-SYSTEMS, Fujitsu Scientific and Technical Journal, 30(2), 1994, pp. 171-180
A 1.48-mu m high-power laser diode for pumping an optical fiber amplif
ier and a low distortion 1.3-mu m distributed feedback (DFB) laser for
an optical CATV transmission system were developed using a compressiv
ely strained layer multi-quantum-well (MQW) structure. A high external
quantum efficiency and comparatively high characteristic temperature
were obtained in optimized InGaAs wells, and an output power as high a
s 210 mW at 1.48 mu m was demonstrated. Using highly strained InGaAsP
wells (strain= 1%), a high external quantum efficiency and low thresho
ld current were obtained at 1.3 mu m. A fabricated 1.3-mu m DFB laser
module for 78-channel CATV transmission demonstrated an extremely tow
distortion of -60 dBc even at a high output power of 13 mW.