A High Power CW Ho,Tm:GdVO₄ Laser¹

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

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

*e-mail: zgbzgl1982@163.com

Received October 26, 2011; in final form, October 27, 2011; published online March 6, 2012

Abstract—In this paper, we report a 22.7 W continuous wave (CW) diode-pumped cryogenic Ho( at %), Tm(3
at %):GdVO₄ laser. The pumping sources of Ho,Tm:GdVO₄ laser are two fiber-coupled laser diodes with fiber
core diameter of 0.4 mm, both of them can supply 42 W power laser operating near 802 nm. For input pump
power of 64.7 W at 802.5 nm, the output power of 22.7 W in CW operation, optical-to-optical conversion effi-
ciency of 35.1% at 2.05 m has been attained. The M² factor was found to be 2.0 under an output power of 16.5
W.

DOI: 10.1134/S1054660X12040342

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