Modelling of a Nd:YAG laser Q-switched by a scanning interferometric mirror |
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| Authors: | Karim Battou Kamel Ait-Ameur |
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| Institution: | a Laboratoire d’Electronique Quantique, Faculté de Physique, USTHB BP n° 32, El Alia, 16111 Algiers, Algeria
b Centre Interdisciplinaire de Recherche Ions Lasers, UMR6637 CEA-CNRS-ENSICAEN et Université de Caen, ENSICAEN, 6 Boulevard Maréchal Juin, F14050 Caen, France |
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| Abstract: | We have modelled a continuously pumped Nd:YAG actively Q-switched by a variable interferometric mirror made up of a scanning Michelson or Fabry-Pérot mirror. We have characterised the three-mirror laser dynamics by using a bifurcation diagram constructed from the plot of peak power-enhancement factor as a function of mirror speed. One observes different chaotic windows separated by period-doubling bifurcations, and stable periodic regime. It is demonstrated that the best performance of the Q-switched laser is obtained rather for low than for high mirror speed (pulse width of 20 ns, and high peak power up to 400 times greater than the continuous emission). |
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| Keywords: | Laser Q-switch Laser dynamics Coupled cavities |
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