Design of a new technique for alleviating thermal dephasing of nonlinear optical crystal

Y. K. Yap; Kyoichi Deki; Y. Kagebayashi; Masahiro Horiguchi; Yuzo Mori; Toru Sasaki

doi:10.1117/12.354198

23 July 1999 Design of a new technique for alleviating thermal dephasing of nonlinear optical crystal

Y. K. Yap, Kyoichi Deki, Y. Kagebayashi, Masahiro Horiguchi, Yuzo Mori, Toru Sasaki

Proceedings Volume 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion; (1999) https://doi.org/10.1117/12.354198
Event: Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 1998, Monterey, CA, United States

Abstract

A novel mechanism to alleviate the thermal dephasing of nonlinear optical crystal was developed. We named it temperature-profile compensation as defined from the in-situ temperature-profile measurement. Based on the concept of this mechanism, design on a technique for 3D temperature- profile compensation was demonstrated. By applying this technique on a CsLi B₆O₁₀ crystal, 10.6-W of 266-nm output power was obtained at 100-Hz. This result is 2.3-fold of that without alleviation. The conversion efficiency of 52 percent from the green is also more effective than the best result optimized at room temperature. Based on the similar concept, 1D temperature-profile compensation is also discussed for cases when the laser beam diameter reduced below approximately 2 mm. This is appropriate for frequency conversion of cw and diode-pumped kHz lasers. The design for 1D temperature-profile compensation can be very simple without involving any gas cooling.

Citation Download Citation

Y. K. Yap, Kyoichi Deki, Y. Kagebayashi, Masahiro Horiguchi, Yuzo Mori, and Toru Sasaki "Design of a new technique for alleviating thermal dephasing of nonlinear optical crystal", Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); https://doi.org/10.1117/12.354198

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