MQW TUNED SEMICONDUCTOR-LASERS WITH UNIFORM FREQUENCY-RESPONSE

A tunable semiconductor laser with an intrinsically wideband uniform f requency response has been developed, using the quantum confined Stark effect in quantum well material as the tuning mechanism. A frequency response uniform within 3 dB from 20 kHz to 1.2 GHz was achieved, limi ted by the measuring system at low frequencies and by device capacitan ce at high frequencies. Analysis shows that with optimised tuning elem ents an uniform frequency response to over 50 GHz should be achievable with this technique.