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Proceedings Paper

Recent progress in mechanically Q-switched 2.94 um Er:YAG – promising pump source for 4-um room temperature Fe:ZnSe lasers
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Paper Abstract

We report laser operation of spinning mirror mechanically Q-switched (MQS), flashlamp pumped 2.94 μm Er:YAG laser depending on the angular speed of the mirror, repetition rate, size and temperature of the gain element, pulse duration and jitter of Q-switch pulses, as well as pump pulse energy. The highest output energy of 260 mJ with a pulse duration of 150 ns was realized with the use of 7×120 mm Er(50%):YAG at 5 Hz repetition rate and 4200 rad/s angular speed of the spinning mirror. The efficiency of Q-switched operation was ~50% with respect to free-running regime. Using optical triggering, the pulse jitter was measured to be smaller than 10 ns for 160 ns Q-switched pulses. Optical triggering could be used for synchronization with mode-locked laser in chirp-pulse and regenerative amplifiers. We also report on development of room temperature gain-switched Fe:ZnSe laser pumped by a radiation of MQS Er:YAG laser. The maximum output energy of 9 mJ from Fe:ZnSe laser was demonstrated using MQS Er:YAG laser as pump source.

Paper Details

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 1125913 (21 February 2020); doi: 10.1117/12.2546846
Show Author Affiliations
Krishna Karki, The Univ. of Alabama at Birmingham (United States)
Shova Subedi, The Univ. of Alabama at Birmingham (United States)
Dmitry Martyshkin, The Univ. of Alabama at Birmingham (United States)
Vladimir Fedorov, The Univ. of Alabama at Birmingham (United States)
Sergey Mirov, The Univ. of Alabama at Birmingham (United States)


Published in SPIE Proceedings Vol. 11259:
Solid State Lasers XXIX: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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