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Smaller Output Beam Divergence in the Slowly Opened Q-Switch Operation

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Abstract

The mechanism of the slowly opened Q-switch operation was investigated thoroughly. Maximum energy extraction from the resonator could be optimized, and the smallest output beam divergence could be achieved. In this article, we present a detailed analysis that has numerically verified the mode-selection mechanism in the slowly opened Q-switch operation, and the degree of the smaller output laser beam divergence that has been achieved. The mechanism of the slowly opened Q-switch operation is the inherent advantage of the passive saturable absorber in this operation. We can use the maximum energy extraction and the smallest output beam divergence results of the slowly opened Q-switch operation to design and optimize various passive saturable absorbers: plastic dye sheets, LiF:F2− color center crystals, Cr4+: YAG crystals, RG1000 color glass filters, and the single crystal semiconductor saturable absorber wafers that are in developed in our microchip laser systems.

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Authors and Affiliations

  1. Institute of Optical Science, National Central University, Chung-Li, Taiwan 320

    Ou-Yang Mang

  2. Institute of Mechanical and Aerospace Engineering, Chung-Hua University, Hsin-Chu, Taiwan 30067

    Junewen Chen & Jun-Ting Lin

Authors
  1. Junewen Chen
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  2. Jun-Ting Lin
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  3. Ou-Yang Mang
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Correspondence to Junewen Chen.

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Chen, J., Lin, JT. & Mang, OY. Smaller Output Beam Divergence in the Slowly Opened Q-Switch Operation. OPT REV 13, 69–76 (2006). https://doi.org/10.1007/s10043-006-0069-7

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  • DOI: https://doi.org/10.1007/s10043-006-0069-7

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