HIGH-POWER AND HIGH-SPEED PERFORMANCE OF 1.3-MU-M STRAINED MQW GAIN-COUPLED DFB LASERS

In-phase gain-coupled distributed feedback (DFB) lasers with etched quantum-well active-layers emitting at 1.3-mu m wavelength have been fabricated for the first time, High optical output power up to 50 mW was achieved while single-mode operation was maintained at the longer wavelength side of the Bragg stop band because the in-phase gain coupling effect favors this wavelength, With the optimization of the strained-layer multi-quantum wells (MQW) in the active region, a large effective differential gain of 7.5-19 x 10(-16) cm(2), a high modulation bandwidth of 18 GHz, and high temperature operation up to 100 degrees C were obtained when the DFB wavelength was not detuned from the material gain peak.