Research on laser diode end-pumped Er:YSGG/YSGG composited crystal at 2.79 µm

Benjian Shen; Hongxiang Kang; Liang Jie; Chen Peng; Huaixiu Fu

doi:10.1117/12.2070660

9 December 2014 Research on laser diode end-pumped Er:YSGG/YSGG composited crystal at 2.79 μm

Benjian Shen, Hongxiang Kang, Liang Jie, Chen Peng, Huaixiu Fu

Proceedings Volume 9294, International Symposium on Optoelectronic Technology and Application 2014: Development and Application of High Power Lasers; 92940K (2014) https://doi.org/10.1117/12.2070660
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

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.

Citation Download Citation

Benjian Shen, Hongxiang Kang, Liang Jie, Chen Peng, and 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); https://doi.org/10.1117/12.2070660

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Crystals

Laser crystals

Composites

Thermal effects

Semiconductor lasers

Continuous wave operation

Laser applications

Show All Keywords

Keywords/Phrases

Search In:

Publication Years