Dual (GaAl) As-heterostructure based injection laser traveling wave amplifier

The stationary transfer characteristics and transients at heterostructure laser amplifiers are calculated on the basis of an empirical model that satisfies spontaneous emission of heterolasers at room temperature. Direct measurements of the physical parameters are made when narrow-band optical signals from an external source are input. Maximum gain of 26 dB was observed, with output signal to background ratio of 7 dB with no spectral selection, and 24 dB using an output filter with passband of 0.1 nm. The experimentally measured parameters confirm the promise of laser amplifiers for the development of new types of fiber optic communications line.