15 October 2015 Compensation system for FM-to-AM effects in high-power laser system
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Proceedings Volume 9671, AOPC 2015: Advances in Laser Technology and Applications; 96711F (2015) https://doi.org/10.1117/12.2199901
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China
In the high-power laser facility, frequency modulation to amplitude modulation (FM-to-AM) effects has seriously affected the power balance between beams and restricted the laser flux levels of safe operation in the system. For FM-to- AM effects produced by gain-narrowing effects, according to the amplifier gain-narrowing function model, after simulating and analyzing the properties of FM-to-AM effects, a corresponding compensation function is designed. Using sinusoidal compensation function, with the use of a birefringent crystal and liquid crystal modulator, adjusting the crystal angle in the range of 45 °, the center wavelength could be reduced in the magnitude of the range from 0 to 30dBm. By changing the voltage of the liquid crystal, the center wavelength could be adjusted within 1051.5-1054.5nm freely. For the regenerative amplifier with the gain of 70dB and input center wavelength of 1053nm and bandwidth of 0.7nm, the output FM-to-AM magnitude could be controlled within ~11% by this compensation system.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zuiyu Chen, Zuiyu Chen, Youen Jiang, Youen Jiang, Jiangfeng Wang, Jiangfeng Wang, Wei Fan, Wei Fan, Xuechun Li, Xuechun Li, } "Compensation system for FM-to-AM effects in high-power laser system", Proc. SPIE 9671, AOPC 2015: Advances in Laser Technology and Applications, 96711F (15 October 2015); doi: 10.1117/12.2199901; https://doi.org/10.1117/12.2199901

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