Title :
Analysis of monolithic integrated master oscillator power amplifiers
Author :
Mehuys, David ; Welch, David F. ; Waarts, Robert G. ; Parke, Ross ; Hardy, Amos ; Streifer, William
Author_Institution :
Spectra Diode Lab., San Jose, CA, USA
fDate :
7/1/1991 12:00:00 AM
Abstract :
An analysis of a novel, monolithic integrated master oscillator power amplifier (M-MOPA) is presented. The M-MOPA consists of a DBR master oscillator which injects power into a linear chain of amplifiers and detuned second-order grating output couplers. The analysis self-consistently includes amplified spontaneous emission buildup and residual reflections throughout the amplifier stages. It predicts that output powers in excess of 1 W can be expected from a single-lateral-mode waveguide multistage amplifier less than 1 cm in length, injected with less than 15 mW of input power. In addition to the signal gain of >25 dB, the signal-to-noise ratio at 1-W output exceeds 15 dB. Because of the small reflections associated with the grating output couplers, and gain saturation by the injected signal, the amplifier self-oscillation threshold is suppressed to current densities above 15 kA/cm2
Keywords :
diffraction gratings; distributed feedback lasers; integrated optoelectronics; optical couplers; superradiance; 1 W; 15 mW; DBR master oscillator; amplified spontaneous emission buildup; amplifier self-oscillation threshold; amplifier stages; analysis; current densities; detuned second-order grating output couplers; gain saturation; injected signal; input power; linear chain; monolithic integrated master oscillator power amplifiers; residual reflections; signal gain; signal-to-noise ratio; single tranverse mode distributed Bragg reflector laser; single-lateral-mode waveguide multistage amplifier; Couplers; Distributed Bragg reflectors; Gain; Gratings; Oscillators; Power amplifiers; Power generation; Reflection; Signal to noise ratio; Spontaneous emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
