Injection traveling-wave laser amplifier based on a (GaAI)As double heterostructure

Theoretical and experimental investigations were made of single-pass amplification of narrowband optical signals in resonator-free stripe heterostructures operated at room temperature. The following optophysical characteristics of laser amplifiers of this type were recorded: the maximum gain was 26 dB; the output signal/background ratio was up to 7 dB without spectral selection and up to 24 dB when an output filter with a pass band 0.1 nm wide was used; the sensitivity was of the order of 100 nW; the output signal power was up to 20 mW; the linear operation range was in excess of 20 dB; the response time in the linear region was less than 1 nsec. The experimental results were in satisfactory agreement with calculations.