Wen-guo HAN, Feng-ping YAN, Ting FENG, et al. High-power Thulium-doped Fiber Laser and Its Application in Biological Tissue Cutting. [J]. Chinese Journal of Luminescence 42(5):708-716(2021)
Wen-guo HAN, Feng-ping YAN, Ting FENG, et al. High-power Thulium-doped Fiber Laser and Its Application in Biological Tissue Cutting. [J]. Chinese Journal of Luminescence 42(5):708-716(2021) DOI： 10.37188/CJL.20210064.
High-power Thulium-doped Fiber Laser and Its Application in Biological Tissue Cutting
A continuous-wave high-power thulium-doped fiber laser was proposed and its biological tissue cutting was studied. A linear cavity thulium-doped fiber laser source was built by using homemade fiber gratings. The output wavelength of the laser source was 1 941.10 nm, and the optical signal-to-noise ratio is 75 dB. The wavelength and power fluctuations within 50 min were less than 0.04 nm and 0.265 dB, respectively. The slope efficiency and the maximum output power were 5.6% and 186 mW, respectively. According to the master-oscillator power amplifier technology, a pre-amplifier and a main-amplifier were built. The slope efficiencies of the two amplifiers were 14.3% and 35.86%, respectively. After two-stage amplification, the final output power was 21.9 W. The biological tissue cutting experiment was carried out by using the laser beam after beam shaping. Several groups of experiments were designed to observe the cutting depth of the laser under different power and moving speed. The experimental results show that the thulium-doped fiber laser has good cutting effect, and it has potential application in biomedical field.
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