Optimization of reflector design for diode-pumped Nd:YAG laser with single-side pumping geometry

Kangin Lee; Youngjung Kim; Hyeon Cheor Lee; Joon-Yong Cho; Jae-Cheul Lee; Yong-Geun Jeon; Jonghoon Yi

doi:10.1117/12.870484

16 November 2010 Optimization of reflector design for diode-pumped Nd:YAG laser with single-side pumping geometry

Kangin Lee, Youngjung Kim, Hyeon Cheor Lee, Joon-Yong Cho, Jae-Cheul Lee, Yong-Geun Jeon, Jonghoon Yi

Proceedings Volume 7843, High-Power Lasers and Applications V; 78431W (2010) https://doi.org/10.1117/12.870484
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

We evaluated characteristics of various shapes of reflector to get uniform and efficient pumping of Nd:YAG rod even with single-side pumping geometry using commercial software ZEMAX and LASCAD. The combined application of the software enabled us to evaluate numerically the laser performance and absorbed pump diode profile. We tried various shape of reflector such as semi-circular, square, elliptical reflectors, and cusp-shape, to get uniform pumping. In the calculation, water flows inside the cooling tube which surrounds the Nd:YAG rod. For further improvement a planarconcave window was placed in front of the diode to enlarge pump beam divergence angle. Through several trial and error, we found optimal pumping chamber configuration for single-side pumping, which gives reasonably uniform and efficient pumping of Nd:YAG rod. The output power and pulsewidth of Q-switched laser output were optimized by varying the laser cavity length and the output coupler reflectivity.

Citation Download Citation

Kangin Lee, Youngjung Kim, Hyeon Cheor Lee, Joon-Yong Cho, Jae-Cheul Lee, Yong-Geun Jeon, and Jonghoon Yi "Optimization of reflector design for diode-pumped Nd:YAG laser with single-side pumping geometry", Proc. SPIE 7843, High-Power Lasers and Applications V, 78431W (16 November 2010); https://doi.org/10.1117/12.870484

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