Broadband operation of InGaAsP-InGaAs GRIN-SC-MQW BH amplifiers with 115 mW output power

Broadband operation of GRIN-SC-MQW BH amplifiers is reported with 115 mW output power at 1.54 μm and 3 dB gain compression. Gain is flat to 0.7 dB over the range 1.42–1.55 μm. Polarisation sensitivity reduces from 4.5 dB at 1.55 μm to 1.4 dB at 1.415 μm.