30.6 W CW Tm³⁺ Fiber Laser of Seed Amplification¹

Y. Liu*, H. R. Wang, and W. H. Li

College of Power and Energy Engineering, Institute of Marin Engine Electronic Control Technology

Harbin Engineering University, Harbin, 150001 China

*e-mail: liuyou12@163.com

Received May 31, 2012; published online September 3, 2012

Abstract—We use all fiber single-mode lasers as seed source, all fiber amplifiers and pump laser coupling
amplifier has been experimentally investigated, respectively. The max output power of all fiber amplifier is 30.6
W, corresponding slope efficiency is 39.1%. The two setups, amplifier output laser spectrum finely holds the
property of seed laser spectrum, the wavelength of output laser are both 1947.6 nm, the spectrum width is less
than 2 nm as same as the wavelength of seed laser. We estimate the beam quality to be M² = 2.42, clearly indi-
cating nearly diffraction-limited beam propagation. Key words: fiber laser; diode pumped; Tm³⁺-doped.

DOI: 10.1134/S1054660X12100143

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