WIAS Preprint No. 1444, (2009)

Improving the stability of distributed-feedback tapered master-oscillator power-amplifiers


  • Tronciu, Vasile Z.
  • Lichtner, Mark
  • Radziunas, Mindaugas
  • Bandelow, Uwe
  • Wenzel, Hans

2010 Mathematics Subject Classification

  • 35Q60 35B30

2008 Physics and Astronomy Classification Scheme

  • 42.55.Px, 42.60.Pk, 42.60.Mi


  • high power lasers, DFB MOPA, coupling coefficient, continuous wave


We report theoretical results on the wavelength stabilization in distributed-feedback 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 traveling 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 to optimize the laser operation, such that for a wide range of injection currents the laser emits a high intensity continuous wave beam.

Appeared in

  • Opt. Quantum Electron., 41 (2010) pp. 531--537.

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