Article

Applied Physics B

, Volume 103, Issue 3, pp 603-607

First online:

Picosecond pulses with 50 W peak power and reduced ASE background from an all-semiconductor MOPA system

  • S. SchwertfegerAffiliated withFerdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik im Forschungsverbund Berlin e.V. Email author 
  • , A. KlehrAffiliated withFerdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik im Forschungsverbund Berlin e.V.
  • , T. HoffmannAffiliated withFerdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik im Forschungsverbund Berlin e.V.
  • , A. LieroAffiliated withFerdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik im Forschungsverbund Berlin e.V.
  • , H. WenzelAffiliated withFerdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik im Forschungsverbund Berlin e.V.
  • , G. ErbertAffiliated withFerdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik im Forschungsverbund Berlin e.V.

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Abstract

Using a single-stage all-semiconductor master oscillator-power amplifier system, consisting of a Q-switched distributed Bragg reflector laser as master oscillator and a tapered power amplifier, we generate laser pulses with a length of 80 ps and a peak power of 50 W. The spectral width is less than 1 nm around a center wavelength of 1066 nm. The background of the amplified spontaneous emission is significantly reduced due to a pulsed, instead of continuous-wave operation of the amplifier. The current pulses have a width of approximately 10 ns and a repetition frequency of 1.25 MHz.