110 W All Fiber Actively Q-Switched Thulium-Doped Fiber Laser

作者：Ouyang, De qin; Zhao, Jun qing; Zheng, Zhi jian; Ruan, Shuang chen^*; Guo, Chun yu; Yan, Pei guang; Xie, Wei xin

来源：IEEE Photonics Journal, 2015, 7(1): 1500407.

DOI：10.1109/JPHOT.2015.2394308

• Thulium-doped fiber laser
• actively Q-switched
• fiber amplifiers
• tunable lasers

We report a 100-W-level, repetition rate and pulsewidth tunable, all-fiber, thulium-doped master oscillator power amplifier system. The master oscillator was actively Q-switched by a fiber-coupled acousto-optic modulator. The generated pulsewidth could be tuned from 1.16 mu m to 46.3 ns by adjusting modulation repetition rate from 1 kHz to 2 MHz, and the pulse repetition rate (PRR) can also be tuned from 1 kHz to 2 MHz, correspondingly. The maximum output power could be boosted to > 110 W (slope efficiency of similar to 55%) through three-stage thulium-doped fiber (TDF) amplifiers at PRR from 100 kHz to 2 MHz. The spectrum bandwidth was about 0.8 nm at the maximum output power without obvious indication of nonlinear effects. To the best of our knowledge, this is the first demonstration of > 110-W, all-fiber, actively Q-switched TDF laser, and it has realized the largest tuning ranges both with the pulsewidth and the PRR.

• 出版日期2015-2
• 单位深圳大学