Randomly polarised beam produced by magnetooptically Q-switched laser
Date
2017-11-17
Authors
Morimoto, Ryohei
Goto, Taichi
Taira, Takunori
Pritchard, John
Takagi, Hiroyuki
Nakamura, Yuichi
Lim, Pang Boey
Uchida, Hironaga
Inoue, Mitsuteru
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Springer Nature
Abstract
Diode-pumped solid-state micro lasers are compact (centimetre-scale), highly stable, and efficient. Previously, we reported Q-switched lasers incorporating rare-earth substituted iron garnet (RIG) film. Here, the first demonstration of the magnetooptical (MO) Q-switch in an Nd:YAG laser cavity is performed. We fabricate a quasi-continuous-wave (QCW) diode-pumped Nd:YAG laser cavity, which is shortened to 10 mm in length and which contains an RIG film and a pair of small coils. This cavity yields a 1,064.58-nm-wavelength pulse with 25-ns duration and 1.1-kW peak power at a 1-kHz repetition ratio. Further, the polarisation state is random, due to the isotropic crystal structure of Nd:YAG and the fact that the MO Q-switch incorporating the RIG film does not require the presence of polarisers in the cavity. This is also the first report of an MO Q-switch producing random polarisation.
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This article is published as Morimoto, Ryohei, Taichi Goto, Takunori Taira, John Pritchard, Mani Mina, Hiroyuki Takagi, Yuichi Nakamura, Pang Boey Lim, Hironaga Uchida, and Mitsuteru Inoue. "Randomly polarised beam produced by magnetooptically Q-switched laser." Scientific Reports 7, no. 1 (2017): 1-6.
DOI: 10.1038/s41598-017-15826-3.
Copyright 2017 The Author(s).
Attribution 4.0 International (CC BY 4.0).
Posted with permission.