976-nm 被動式Q-開關全光纖脈衝雷射的效率改善研究

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976-nm 被動式Q-開關全光纖脈衝雷射的效率改善研究

A study and improvement of a passively Q-switched all-fiber laser at 976nm

廖興維 , Masters　　Advisor：蔡宗祐　　

繁體中文

全光纖雷射；模態場不匹配；脈衝重覆率；自發性Q與增益雙切換； all-fiber laser ； mode-filed-area mismatch ； repetition rate ； self-balanced Q- and gain- switching

Abstract │ Reference (30) │ Altmetrics

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In this paper, the previous results of the laboratory are studied to study the characteristics of ytterbium-saturated, passive, all-fiber pulsed laser systems. A 915 nm laser diode was used as the driving source for the continuous wave laser and the dual resonator system was set at 976 nm and 1030 nm. At the same time, the modal field mismatch technique is used to accelerate the self-balancing mechanism of saturated absorber, and the all-fiber laser system is set up. In addition, the use of Matlab simulation of the laser equation, auxiliary simulation of the resonant cavity of the behavior. The influence of the parameters on the Ng value and the Na value is discussed, and an optimized result is obtained in the system. Experiments is divided into two parts: (1) by reducing the resonant cavity length to measure the better pulse characteristics and (2) the use of FBG to restore the original structure of the energy reuse, improve system efficiency, while both stable laser diode wavelength The function is equivalent to the third resonator of the system. When the input power is 197mW, it can generate 976nm laser with pulse energy of 0.3574μJ, repetition rate of 101kHz, pulse width of 72ns and pulse peak of 4.963W.

Reference ( 30 ) 〈TOP〉

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連結：
[3] S. Y. C. Hwanseong Jeong, Fabian Rotermund, Yong-Ho Cha, Do-Young Jeong, and Dong-Il Yeom, "All-fiber mode-locked laser oscillator with pulse energy of 34 nJ using a single-walled carbon nanotube saturable absorber," vol. Vol. 22, Issue 19, pp. 22667-22672 (2014).
連結：
[7] R. H. S. a. E.P.Ippen, "Raman gain in glass optical waveguides," vol. Appl.phys.Lett.,vol22,pp.276,1975.
連結：
[9] Y. W. a. C.-Q. Xu, "Understanding multipeak phenomena in actively Q-switched fiber lasers," vol. Vol. 29, Issue 10, pp. 1060-1062 (2004).
連結：
[10] A. D. P. Pérez-Millán, M. V. Andrés, D. Zalvidea, and R. Duchowicz, "Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating," vol. Vol. 13, Issue 13, pp. 5046-5051 (2005).
連結：

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