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Microsecond Long Pulse Generation of Nd:YAG Laser Using Rayleigh PFN Circuit

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Abstract

A free-running mode operation of a Nd:YAG laser allowed to obtain long laser pulses varying from tens to hundreds of microseconds. The laser rod was pumped by a xenon flash-lamp that has been electrically supplied by a pulsed current obtained using a PFN (Pulse forming network) circuit. The output laser pulse width was increased by increasing the number of the PFN meshes. For a PFN circuit with five meshes, the obtained laser pulse widths were 436 and 700 µs depending on the single-mesh current width. The generation of long laser pulses allowed obtaining multipulse with different laser pulse lengths thanks to the use of an insulated gate bipolar transistor (IGBT) instead of a silicon controlled rectifier (SCR) to control the capacitor discharge time into the flash-lamp. In this mode of operation, the number of pulses and the pulse width could be adjusted. The obtained laser pulse widths were of 100 and 25 µs.

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  1. Centre de Développement des Technologies Avancées, Division Milieux Ionisés et Lasers, Cité du 20 août 1956, BP n. 17, Baba Hassen, 16303, Alger, Algérie

    F. Almabouada

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  1. F. Almabouada
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Correspondence to F. Almabouada.

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Almabouada, F. Microsecond Long Pulse Generation of Nd:YAG Laser Using Rayleigh PFN Circuit. Instrum Exp Tech 64, 248–253 (2021). https://doi.org/10.1134/S0020441221010036

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