Acousto-Optic Q-Switched Pulse Fiber Laser with the Peak Power of 9kW

Abstract

An acousto-optic Q-switched pulse fiber laser was presented, and the output power of 20.3W was obtained by using the one-stage Ytterbium-doped double-cladding fiber amplification. The repetition frequency of the pulse fiber laser was tunable in the range of 20-60kHz. We obtained the pulse output with pulse width of 113ns, peak power of 9kW and the average power of 20.3W, when the repetition frequency was 20kHz. We also measured pulse width at different repetition rate and analyzed pulse waveform.

Large-Size Crystal Growth and a Fiber-Coupled Acousto-Optic Device of TiTe3O8

“…1−4 The acousto-optic Q-switch is an important active optical modulation in the time domain, exhibiting low modulation voltage, high extinction ratio, and good stability. 5−8 The fiber acousto-optic Q-switch, 9,10 which can ensure an all-fiber structure, is usually used to generate high-energy pulse fiber lasers. 11,12 Compared with free space lasers, the polarization lasers have advantage in the fields of optical fiber sensing, signal processing, and coherent detection.…”

“…Due to a compact cavity, easy to achieve high-energy output, and low cost, the fiber lasers have been developed rapidly and widely used in optical communication, remote sensing, laser medicine, gas detections, etc. − The acousto-optic Q-switch is an important active optical modulation in the time domain, exhibiting low modulation voltage, high extinction ratio, and good stability. − The fiber acousto-optic Q-switch, , which can ensure an all-fiber structure, is usually used to generate high-energy pulse fiber lasers. , Compared with free space lasers, the polarization lasers have advantage in the fields of optical fiber sensing, signal processing, and coherent detection. − When the polarization laser propagates through the acousto-optic Q-switch without polarization-maintaining ability, the continuous laser can be changed to pulse laser. However, the depolarization of the laser will generate due to the birefringence of acousto-optic crystals.…”