H. Yamazaki et al., LOW DRIVE VOLTAGE (1.5VPP) AND HIGH-POWER DFB-LD MODULATOR INTEGRATEDLIGHT-SOURCES USING BANDGAP ENERGY CONTROLLED SELECTIVE MOVPE/, Electronics Letters, 32(2), 1996, pp. 109-111
The authors have reduced modulator drive voltage in DFB-LD/modulator i
ntegrated light sources (DFB/MODs) takins fabrication tolerance into a
ccount. By enhancing the quantum confined Stark effect through well wi
dth increase and optimising the doping profile. DFB/MODS with >13dB ex
tinction ratio at 1.5V and >4mW (+6dBm) output Dower al 100mA were ach
ieved while maintaining a reasonably large fabrication tolerance.