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1 December 2017 A practical model of thin disk regenerative amplifier based on analytical expression of ASE lifetime
Huang Zhou, Michal Chyla, Siva Sankar Nagisetty, Liyuan Chen, Akira Endo, Martin Smrz, Tomas Mocek
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Proceedings Volume 10603, Photonics, Devices, and Systems VII; 1060303 (2017) https://doi.org/10.1117/12.2292319
Event: Photonics Prague 2017, 2017, Prague, Czech Republic
Abstract
In this paper, a practical model of a thin disk regenerative amplifier has been developed based on an analytical approach, in which Drew A. Copeland [1] had evaluated the loss rate of the upper state laser level due to ASE and derived the analytical expression of the effective life-time of the upper-state laser level by taking the Lorentzian stimulated emission line-shape and total internal reflection into account. By adopting the analytical expression of effective life-time in the rate equations, we have developed a less numerically intensive model for predicting and analyzing the performance of a thin disk regenerative amplifier. Thanks to the model, optimized combination of various parameters can be obtained to avoid saturation, period-doubling bifurcation or first pulse suppression prior to experiments. The effective life-time due to ASE is also analyzed against various parameters. The simulated results fit well with experimental data. By fitting more experimental results with numerical model, we can improve the parameters of the model, such as reflective factor which is used to determine the weight of boundary reflection within the influence of ASE. This practical model will be used to explore the scaling limits imposed by ASE of the thin disk regenerative amplifier being developed in HiLASE Centre.
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Huang Zhou, Michal Chyla, Siva Sankar Nagisetty, Liyuan Chen, Akira Endo, Martin Smrz, and Tomas Mocek "A practical model of thin disk regenerative amplifier based on analytical expression of ASE lifetime", Proc. SPIE 10603, Photonics, Devices, and Systems VII, 1060303 (1 December 2017); https://doi.org/10.1117/12.2292319
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KEYWORDS
Amplifiers
Analytical research
Absorption
Factor analysis
Performance modeling
Disk lasers
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