Magneto-optical Q-switching using magnetic garnet film with micromagnetic domains | Zendy

Taichi Goto | Zendy; Ryohei Morimoto | Zendy; John W. Pritchard | Zendy; Mani Mina | Zendy; Hiroyuki Takagi | Zendy; Yuichi Nakamura | Zendy; Pang Boey Lim | Zendy; Takunori Taira | Zendy; M. Inoue | Zendy

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Magneto-optical Q-switching using magnetic garnet film with micromagnetic domains

Author(s) -

Taichi Goto,

Ryohei Morimoto,

John W. Pritchard,

Mani Mina,

Hiroyuki Takagi,

Yuichi Nakamura,

Pang Boey Lim,

Takunori Taira,

M. Inoue

Publication year - 2016

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.24.017635

Subject(s) - laser , optics , switching time , materials science , pulsed power , q switching , pulse (music) , pulse width modulation , optical switch , optoelectronics , power (physics) , magnetic field , pulse duration , physics , detector , quantum mechanics

High-power giant pulses can be used applied in various applications with Q-switched micro-lasers. This method can shorten the pulse duration; however, active control is currently impossible in micro-lasers. To achieve precise pulse control while maintaining compactness and simplicity, we exploit the magneto-optical effect in magnetic garnet films with micromagnetic domains that can be actively controlled by a pulsed magnetic field. Our Q-switching technique enhances the output power by a factor of 4 × 10 3 . Moreover, the device itself is smaller than other Q-switching devices. This novel type of active Q-switch can be combined with a micro-laser to obtain megawatt-order pulses.

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