Improving the stability of distributed-feedback tapered master-oscillator power-amplifiers
V.Z. Tronciu1, M. Lichtner1, M. Radziunas1, U. Bandelow1, H. Wenzel2
Published in:
Opt. Quant. Electron., vol. 41, no. 7, pp. 531-537 (2010).
Abstract:
We report theoretical results on the wavelength stabilization in distributedfeedback master-oscillator power-amplifiers which are compact semiconductor laser devices capable of emitting a high brilliance beam at an optical power of several Watts. Based on a travelling wave equation model, we calculate emitted optical power and spectral maps in dependence on the pump of the power amplifier. We show that a proper choice of the Bragg grating type and coupling coefficient allows optimization of the laser operation, such that the laser emits a high intensity continuous wave beam for a wide range of injection currents.
1 Weierstrass Institute for Applied Analysis and Stochastics, Mohrenstr. 39, 10117 Berlin, Germany
2 Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Strasse 4, D-12489 Berlin, Germany
Keywords:
High power lasers, DFB MOPA, Coupling coefficient, Continuous wave
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