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Proceedings Article

OP-GaAs OPO pumped by 2μm Q-switched lasers: Tm;Ho:silica fiber laser and Ho:YAG laser

[+] Author Affiliations
C. Kieleck, A. Hildenbrand, M. Eichhorn

Institut Franco-Allemand de Recherches de Saint-Louis (France)

D. Faye, E. Lallier

Thales Research & Technology France (France)

B. Gérard

Alcatel-Thales III-V Lab (France)

S. D. Jackson

The Univ. of Sydney (Australia)

Proc. SPIE 7836, Technologies for Optical Countermeasures VII, 783607 (October 12, 2010); doi:10.1117/12.865217
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From Conference Volume 7836

  • Technologies for Optical Countermeasures VII
  • David H. Titterton; Mark A. Richardson
  • Toulouse, France | September 20, 2010

abstract

Improvement in hybrid vapour phase epitaxy growing techniques of quasi-phase-matched orientation-patterned GaAs (OP-GaAs) allows larger sample thickness and permits efficient operation as a mid-infrared optical parametric oscillator at Watt-level average output powers [1-3]. Especially its low absorption loss (- 0.01 cm-1), its laser damage threshold comparable to ZGP (- 2 J/cm2) combined with a large nonlinear coefficient, a good thermal conductivity, excellent mechanical properties, and a wide transparency range (0.9-17 μm) are suitable properties for efficient non-critical phase matched OPOs. As there is no natural birefringence in GaAs, phase matching is independent of polarization and propagation direction, offering the ability to pump OP-GaAs with a variety of polarization states. Thus, even unpolarized or poorly polarized sources like simple fiber lasers have been efficiently used as pump sources [4-5]. The paper discuss the best OP-GaAs OPO results achieved, to our knowledge, using a Q-switched 2.09 μm Ho:YAG laser as pump source as well as results obtained with an OP-GaAs OPO directly pumped by a 2.09 μm Q-switched Tm,Ho:silica fiber laser. With a 2.09 μm Q-switched Ho:YAG fiber laser pump source up to 2.9 W of average output power was achieved at 20 kHz repetition rate, 3.9 W at 40 kHz and 4.9 W at 50 kHz. With a 2.09 μm Q-switched Tm3+,Ho3+:silica fiber laser pump source, up to 2.2 W of average output power was achieved at 40 kHz repetition rate, 1.9 W at 60 kHz and 1.3 W at 75 kHz in the mid-infrared range.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

C. Kieleck ; A. Hildenbrand ; M. Eichhorn ; D. Faye ; E. Lallier, et al.
"OP-GaAs OPO pumped by 2μm Q-switched lasers: Tm;Ho:silica fiber laser and Ho:YAG laser", Proc. SPIE 7836, Technologies for Optical Countermeasures VII, 783607 (October 12, 2010); doi:10.1117/12.865217; http://dx.doi.org/10.1117/12.865217


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