High Power Laser Science and Engineering, Volume. 4, Issue 1, 010000e3(2016)

High duty cycle, highly efficient fiber coupled 940-nm pump module for high-energy solid-state lasers

Ren′e Platz, Bernd Eppich, Juliane Rieprich, Wolfgang Pittroff, G¨otz Erbert, and Paul Crump
Author Affiliations
  • Ferdinand-Braun-Institut, Leibniz-Institut f¨ur H¨ochstfrequenztechnik, Gustav-Kirchhoff-Stra?e 4, 12489 Berlin, Germany
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    Figures & Tables(9)
    Single stack element.
    3.6 kW stack subassembly with fast-axis collimation.
    Optical simulation of the 6 kW fiber coupling system.
    Measured beam profile near the focus plane, which is identical with the coupling plane. The plotted circle corresponds to the fiber core diameter.
    Measured caustic of the focused laser beam.
    6 kW pump module with 1.9 mm high-power fiber. Dimensions without fiber: 68 cm $\times$ 32 cm $\times$ 20 cm.
    Power characteristics of the pump module (out of fiber).
    Peak output power (a) and spectral distribution (b) of the pump module depending on duty cycle.
    • Table 1. Typical stack data (measured).

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      Table 1. Typical stack data (measured).

      Number of emitters 28
      Operating current 140 A
      Pulse width 1 ms
      Repetition rate 100–200 Hz
      Peak power 3.6 kW
      Electro-optical efficiency 60%
      Vertical BPP${<}$90 mm mrad ($M^{2}<300$)
      Lateral BPP${<}$90 mm mrad ($M^{2}<300$)
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    Ren′e Platz, Bernd Eppich, Juliane Rieprich, Wolfgang Pittroff, G¨otz Erbert, Paul Crump. High duty cycle, highly efficient fiber coupled 940-nm pump module for high-energy solid-state lasers[J]. High Power Laser Science and Engineering, 2016, 4(1): 010000e3

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    Paper Information

    Special Issue: HIGH ENERGY CLASS-DIODE PUMPED SOLID STATE LASER TECHNOLOGY

    Received: Nov. 30, 2015

    Accepted: Jan. 8, 2016

    Published Online: Oct. 25, 2016

    The Author Email:

    DOI:10.1017/hpl.2016.5

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