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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 23 — Nov. 10, 2008
  • pp: 18557–18564

Measurement of pump-induced transient lensing in a cryogenically-cooled high average power Ti:sapphire amplifier

Thomas A. Planchon, Wafa Amir, Colby Childress, Jeff A. Squier, and Charles G. Durfee  »View Author Affiliations

Optics Express, Vol. 16, Issue 23, pp. 18557-18564 (2008)

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The transient thermal lensing in a liquid-nitrogren cooled kilohertz multipass amplifier is quantitatively measured with spatially-resolved Fourier transform spectral interferometry. A pump-probe arrangement allows the observation of a polarization-dependent non-thermal component following the fluorescence timescale: additional cooling would not suppress this residual lensing. We also observe a time-dependent thermal component that has a timescale sufficiently fast to indicate that there is cooling between shots even at a repetition rate of 1 kHz. The value of pump-induced lensing would be underestimated when performing time-averaged measurements of pump-induced phase shifts.

© 2008 Optical Society of America

OCIS Codes
(140.3590) Lasers and laser optics : Lasers, titanium
(140.6810) Lasers and laser optics : Thermal effects
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: July 16, 2008
Revised Manuscript: October 11, 2008
Manuscript Accepted: October 16, 2008
Published: October 27, 2008

Thomas A. Planchon, Wafa Amir, Colby Childress, Jeff A. Squier, and Charles G. Durfee, "Measurement of pump-induced transient lensing in a cryogenically-cooled high average power Ti:sapphire amplifier," Opt. Express 16, 18557-18564 (2008)

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