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Proceedings Paper

Thermal investigation of a 120-W Tm:YAG laser
Author(s): Wenjie Xie; Kin Seng Lai; Yuan Liang Lim; Ruifen Wu; Ernest Lau; Hui Feng Wong
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Paper Abstract

We demonstrated a 120-W side-pumped Tm:YAG laser with compound parabolic concentrators (CPC's) to couple the pump light into the laser rod. The optical-to-optical efficiency of this laser is 25.2% and the slope efficiency is 31.2%. At such high average power operation, we encountered severe thermal lensing in our Tm:YAG laser rod which prevented us from increasing the diode pump power due to the thermal rollover as the laser cavity become unstable. In this paper, Temperature was measured using IR camera. Temperature and stress distributions are obtained using finite element method. Those data can be used to estimate the fracture limit, the thermal lensing, the thermal distortion of the Tm:YAG laser and subsequently correct the thermal distortion using diffractive optical devices etc.

Paper Details

Date Published: 29 October 2001
PDF: 8 pages
Proc. SPIE 4595, Photonic Systems and Applications, (29 October 2001); doi: 10.1117/12.446596
Show Author Affiliations
Wenjie Xie, DSO National Labs. (United States)
Kin Seng Lai, DSO National Labs. (Singapore)
Yuan Liang Lim, DSO National Labs. (Singapore)
Ruifen Wu, DSO National Labs. (Singapore)
Ernest Lau, DSO National Labs. (Singapore)
Hui Feng Wong, DSO National Labs. (Singapore)

Published in SPIE Proceedings Vol. 4595:
Photonic Systems and Applications
Yakov S. Sidorin; Ding Yuan Tang, Editor(s)

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