9 December 2014 Research on laser diode end-pumped Er:YSGG/YSGG composited crystal at 2.79 μm
Author Affiliations +
Lasers at 2.79 μm emitted by Er:YSGG crystal have attracted considerable interest in biological and medical applications. However, due to the thermal effect of laser crystal, the output power has been limited. In this paper, the advantages of Er:YSGG/YSGG composite crystal in reducing thermal effects and achieving high output power are investigated theoretically and experimentally. The numerical results show that the temperature rising and total thermal deformation of Er:YSGG/YSGG composite crystal are evidently reduced because the undoped YSGG absorbs the heat generated from the Er:YSGG. The maximum temperature rising reduces with increasing of the length of undoped YSGG crystal, and its location moves from the pump face to the inside of the Er:YSGG. The optical path difference of the Er:YSGG/YSGG composite crystal is obviously reduced comparing with that of Er:YSGG crystal, which indicates the thermal focal length of the Er:YSGG/YSGG composite crystal is increased, and the thermal effects are reduced. In experiments, the maximum continuous wave output power of 900 mW with slope efficiency of 12.1% at wavelength of 2.79 μm is obtained in laser diode end pumped Er:YSGG/YSGG crystal. To our knowledge, the output power of Er:YSGG/YSGG crystal is the highest value for the laser diode end pumped Er:YSGG crystal. The thermal focal length of the Er:YSGG/YSGG measured in experiment is increased comparing with that of Er:YSGG. Investigations have demonstrated that the Er:YSGG/YSGG composite crystal has a great advantage in reducing the influence of thermal effects and achieving high output power.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Benjian Shen, Benjian Shen, Hongxiang Kang, Hongxiang Kang, Liang Jie, Liang Jie, Chen Peng, Chen Peng, Huaixiu Fu, Huaixiu Fu, } "Research on laser diode end-pumped Er:YSGG/YSGG composited crystal at 2.79 μm", Proc. SPIE 9294, International Symposium on Optoelectronic Technology and Application 2014: Development and Application of High Power Lasers, 92940K (9 December 2014); doi: 10.1117/12.2070660; https://doi.org/10.1117/12.2070660


A 9.61 W, b cut Tm,Ho YAP laser in Q...
Proceedings of SPIE (February 20 2018)
Diode pumped DUV cw all solid state laser to replace...
Proceedings of SPIE (April 14 2000)
Reliability of high-power semiconductor laser arrays
Proceedings of SPIE (October 23 1992)
External cavity frequency doubler from 858 to 429 nm using...
Proceedings of SPIE (September 05 2002)
LD pumped Nd YAG KTP intracavity frequency doubled 1.2 W...
Proceedings of SPIE (February 10 2005)

Back to Top