Chinese Optics Letters, 2016, 14 (6): 061401, Published Online: Aug. 3, 2018  

Performance of a monolithic Tm:YLF micro laser Download: 721次

Author Affiliations
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China
Abstract
We report a monolithic Tm:YLF micro laser in this Letter. In order to improve the relaxation oscillation of the laser, both ends of the crystal are coated, making the Tm:YLF crystal itself a resonant cavity. The micro laser is pumped by a 792 nm laser diode operated in the continuous wave (CW) mode. We obtain maximum output powers of 7.78 and 10.4 W at the total incident power of 43.6 W with focus lenses of 37.5 and 40 mm, respectively, corresponding to the slope efficiencies of 25.6% and 40.0% and the optical–optical conversion efficiencies of 17.8% and 23.8%. It is clear that the amplitude of the relaxation oscillation is smaller and the beam quality is better with the focus length of 37.5 mm; however, the laser with the focus length of 40 mm produces a higher output power and a more stable wavelength centering at 1878.44 nm.

Baoquan Yao, He Li, Shuang Bai, Zheng Cui, Xiaolei Li, Xiaoming Duan, Yingjie Shen, Tongyu Dai. Performance of a monolithic Tm:YLF micro laser[J]. Chinese Optics Letters, 2016, 14(6): 061401.

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