Laser Spectrum of a High Power Tm, Ho:GdVO₄ Laser¹

Y. Z. Wang, G. L. Zhu*, Y. L. Ju, and B. Q. Yao

National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China

*e-mail: zgbzgl1982@163.com

Received August 4, 2011; in final form August 6, 2011; published online November 28, 2011

Abstract—In this paper, we report a 18.8 W continuous wave and 18.4 W Q-switched diode-pumped cryogenic
Tm(5 at %), Ho(0.5 at %):GdVO₄ laser. The pumping source of Tm, Ho:GdVO₄ laser is a fiber-coupled laser
diode with fiber core diameter of 0.4 mm, supplying 42 W power at 802.5 nm. For input pump power of 41.9
W at 802.4 nm, the output power of 18.8 W in CW operation, optical-to-optical conversion efficiency of 45%
at 2.05 m and the average output power of 18.4 W in Q-switched operation, optical-to-optical conversion effi-
ciency of 44% at 2.04 and 2.05 m have been attained. The emission wavelengths of the Tm(5at %), Ho(0.5 at
%):GdVO₄ laser were firstly compared when it worked in CW mode and Q-switched mode.

DOI: 10.1134/S1054660X12010252

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