Abstract
The optical and RF characteristics of short-cavity, strained-layer In/sub 0.3/Ga/sub 0.7/As graded-index separate-confinement-heterostructure (GRINSCH) multiple-quantum-well ridge waveguide lasers are described. Short-cavity-length strained-layer lasers with four In/sub 0.3/Ga/sub 0.7/As quantum wells have been fabricated using chemically assisted ion beam etching (CAIBE). These lasers have a very low K factor of 0.14 ns and a high differential gain of 1.1*10/sup -15/ cm/sup 2/. A 3 dB modulation bandwidth of 23.5 GHz has been measured on a 50 mu m cavity-length device. This is the highest reported bandwidth for a quantum well laser. >
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