Abstract
Reports travelling-wave 1.5 mu m semiconductor laser amplifiers with very low gain ripple. The average facet reflectivity is less than 5*10/sup -5/ over a 170 AA interval. The minimum gain ripple is below the measurement accuracy, 0.2 dB, at 27.5 dB gain. When used as an optical preamplifier in a 4 Gbit/s receiver, a sensitivity of -34.3 dBm is achieved.< >
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