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5 October 2017 High-power, widely tunable Tm:CaGdAlO4 laser resonantly pumped by a Raman fiber laser at ∼1.7 μm
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Abstract
We report on a high-power, continuously tunable Tm:CaGdAlO4 (Tm:CALGO) laser with a volume Bragg grating (VBG) as a wavelength selector and a homemade ∼1.7-μm Raman fiber laser as a pump source. Taking the advantages of high diffraction efficiency of VBG, low quantum loss of in-band pumping, and smooth and flat gain spectrum of Tm:CALGO, <5-W output power was achieved in the range of 1945.6 to 1993.7 nm, within a total tuning range from 1919.7 to 1993.7 nm, i.e., 74 nm. The beam quality M2 factors at 5-W output power around 1959.5 nm were 1.31 and 1.32 in the x- and y-directions, respectively.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2017/$25.00 © 2017 SPIE
Yongguang Zhao, Fan Wu, Xiaodong Xu, and Deyuan Shen "High-power, widely tunable Tm:CaGdAlO4 laser resonantly pumped by a Raman fiber laser at ∼1.7 μm," Optical Engineering 57(2), 021206 (5 October 2017). https://doi.org/10.1117/1.OE.57.2.021206
Received: 12 April 2017; Accepted: 6 September 2017; Published: 5 October 2017
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