Investigations on fibers for high-peak power pulsed Nd:YAG-lasers for laser detonator

Yang Gao; Xing-hai Zhao; Wei Su; Yong-sheng Cheng; Mei-jian Xu; Wen-tao Duan; Hai-wu Yu

doi:10.1117/12.779701

16 April 2008 Investigations on fibers for high-peak power pulsed Nd:YAG-lasers for laser detonator

Yang Gao, Xing-hai Zhao, Wei Su, Yong-sheng Cheng, Mei-jian Xu, Wen-tao Duan, Hai-wu Yu

Proceedings Volume 6998, Solid State Lasers and Amplifiers III; 69981C (2008) https://doi.org/10.1117/12.779701
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

For laser detonator application, high-peak power pulsed Nd:YAG laser is transmitted through all-silica optical fiber. The transmission properties of step-index fibers are investigated, using a high-peak power pulsed Nd: YAG rod laser with beyond 1MW power and Q-switch mode. The fibers are step-index multimode fibers with 400 or 600 μm core diameters, 440 or 660 μm cladding diameters. The power delivery characteristics were studied by theory and experiments. The results show that the fiber core diameter, NA, length and so on affect the transmission efficiency for high power laser. When the laser power is beyond a certain threshold, the SRS and SBS will be serious; the quantity of fiber end-face limits to the raising of laser power passing through fibers; the zero-probability damage threshold is calculated according to ISO/DIS standard 11254-1.2, which is 58.6J/cm². Energy distribution of output beam from fibers will be uniform. Even the fiber end-face was partly damaged, laser power is still deliverable, and the transmission efficiency is related to the fiber damage grade.

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Yang Gao, Xing-hai Zhao, Wei Su, Yong-sheng Cheng, Mei-jian Xu, Wen-tao Duan, and Hai-wu Yu "Investigations on fibers for high-peak power pulsed Nd:YAG-lasers for laser detonator", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69981C (16 April 2008); https://doi.org/10.1117/12.779701

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