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Appl. Phys. Express 1 (2008) 062005 (3 pages)  |Previous Article| |Next Article|  |Table of Contents|
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A Compact Diode-Pumped Microchip Green Light Source with a Built-in Thermoelectric Element

Changsoo Jung, Bong-Ahn Yu, Kangin Lee1, Yeung Lak Lee, Nan Ei Yu, Do-Kyeong Ko, and Jongmin Lee

Nonlinear Optics Laboratory, Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
1Department of Physics, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do 712-749, Korea

(Received March 19, 2008; accepted May 9, 2008; published online May 30, 2008)

A diode-pumped microchip green light source which was based upon a diffusion-bonded Nd:YVO4/KTiOPO4 composite crystal and had a built-in thermoelectric element was developed. The source had the small volume of 0.7 cm3 and showed the average green power of up to 25 mW and the average electrical power consumed in the thermoelectric element of 15 mW at the interior temperature of 51 °C, under the driving condition of the duty ratio of 50%, the average electrical power consumed in pump diode of about 304 mW, and the ambient temperature of 20 °C, which resulted in the electrical-to-optical conversion efficiency of up to 7.8%. The power of the source was so stable with the fluctuation of less than 0.2%. Our source is the smallest green laser with the built-in temperature-controlling unit to our knowledge and thought to be useful in many applications including the portable laser display system. ©2008 The Japan Society of Applied Physics

URL: http://apex.ipap.jp/link?APEX/1/062005/
DOI: 10.1143/APEX.1.062005


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