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Micromachines
Volume 16
Issue 2
10.3390/mi16020222
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Article

High-Pulse-Repetition-Rate Eye-Safe Raman Laser with Acousto-Optic Q-Switched Device

by
Yu-Hsin Hsu
1,
Song-Qing Lin
1,
Dai-Jun Liu
1,
Hsing-Chih Liang
2 and
Yung-Fu Chen
1,*
1
Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
2
Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
*
Author to whom correspondence should be addressed.
Micromachines 2025, 16(2), 222; https://doi.org/10.3390/mi16020222
Submission received: 14 January 2025 / Revised: 12 February 2025 / Accepted: 14 February 2025 / Published: 16 February 2025
(This article belongs to the Special Issue Surface and Bulk Acoustic Wave Devices)
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Abstract

The acousto-optic Q-switch is exploited to develop a high-repetition-rate eye-safe Raman laser at 1526 nm. The Nd:YVO4 and KGW crystals are employed as the fundamental laser and Stokes Raman gain materials, respectively. The influence of the gate-open time on the performance is systematically explored for the repetition rate between 80 and 150 kHz. The separate configuration is used to construct the resonant cavities for the fundamental and Stokes waves to achieve a pulse width that is as short as possible. Under the optimal alignment, the average output power can exceed 5.0 W at a pump power of 30 W for a repetition rate within 100–150 kHz with a gate-open time of 0.5 μs. In addition, the output peak power can be greater than 10 kW for a pulse repetition rate between 80 and 120 kHz. The optical-to-optical conversion efficiency is up to 16.7%, which is better than that obtained by the Nd:YVO4/YVO4 system.
Keywords: acousto-optic; Q-switch; eye-safe laser; Raman scattering acousto-optic; Q-switch; eye-safe laser; Raman scattering

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MDPI and ACS Style

Hsu, Y.-H.; Lin, S.-Q.; Liu, D.-J.; Liang, H.-C.; Chen, Y.-F. High-Pulse-Repetition-Rate Eye-Safe Raman Laser with Acousto-Optic Q-Switched Device. Micromachines 2025, 16, 222. https://doi.org/10.3390/mi16020222

AMA Style

Hsu Y-H, Lin S-Q, Liu D-J, Liang H-C, Chen Y-F. High-Pulse-Repetition-Rate Eye-Safe Raman Laser with Acousto-Optic Q-Switched Device. Micromachines. 2025; 16(2):222. https://doi.org/10.3390/mi16020222

Chicago/Turabian Style

Hsu, Yu-Hsin, Song-Qing Lin, Dai-Jun Liu, Hsing-Chih Liang, and Yung-Fu Chen. 2025. "High-Pulse-Repetition-Rate Eye-Safe Raman Laser with Acousto-Optic Q-Switched Device" Micromachines 16, no. 2: 222. https://doi.org/10.3390/mi16020222

APA Style

Hsu, Y.-H., Lin, S.-Q., Liu, D.-J., Liang, H.-C., & Chen, Y.-F. (2025). High-Pulse-Repetition-Rate Eye-Safe Raman Laser with Acousto-Optic Q-Switched Device. Micromachines, 16(2), 222. https://doi.org/10.3390/mi16020222

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