Randomly polarised beam produced by magnetooptically Q-switched laser

Ryohei Morimoto; Taichi Goto; Takunori Taira; John Pritchard; Mani Mina; Hiroyuki Takagi; Yuichi Nakamura; Pang Boey Lim; Hironaga Uchida; Mitsuteru Inoue

doi:10.1038/s41598-017-15826-3

Scientific Reports (Nov 2017)

Randomly polarised beam produced by magnetooptically Q-switched laser

Ryohei Morimoto,
Taichi Goto,
Takunori Taira,
John Pritchard,
Mani Mina,
Hiroyuki Takagi,
Yuichi Nakamura,
Pang Boey Lim,
Hironaga Uchida,
Mitsuteru Inoue

Affiliations

Ryohei Morimoto: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku
Taichi Goto: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku
Takunori Taira: Institute for Molecular Science, Laser Research Centre, 38 Nishigonaka, Myodaiji
John Pritchard: Electrical and Computer Engineering Department, Iowa State University
Mani Mina: Electrical and Computer Engineering Department, Iowa State University
Hiroyuki Takagi: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku
Yuichi Nakamura: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku
Pang Boey Lim: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku
Hironaga Uchida: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku
Mitsuteru Inoue: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku

DOI: https://doi.org/10.1038/s41598-017-15826-3
Journal volume & issue: Vol. 7, no. 1
pp. 1 – 6

Abstract

Read online

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.

Published in Scientific Reports

ISSN: 2045-2322 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Medicine; Science
Website: https://www.nature.com/srep/

About the journal