20 February 2007 Cryogenically cooled Ti:sapphire amplifiers
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Abstract
Cryogenic cooling of Ti:Sapphire is a well known technique for improving its thermal performance. In particular the improvement in thermal conductivity, temperature dependence of the index of refraction and thermal expansion around 77 K dramatically reduces the thermal lensing. This allows a significant increase in the possible pump power, while keeping a very good beam quality over a wider range of operation. As an example we demonstrate a single-stage regenerative amplifier that is capable of delivering compressed output powers of 7.5 W and 11.9 W at 1 and 5 kHz, respectively, as well as a multi-pass amplifier delivering 13.2 W at 1 kHz.
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Jean-Marc Heritier, Jean-Marc Heritier, Steve Fournier, Steve Fournier, G. J. Germann, G. J. Germann, B. Resan, B. Resan, R. Viselga, R. Viselga, A. Fry, A. Fry, "Cryogenically cooled Ti:sapphire amplifiers", Proc. SPIE 6451, Solid State Lasers XVI: Technology and Devices, 64510V (20 February 2007); doi: 10.1117/12.707693; https://doi.org/10.1117/12.707693
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