METHOD FOR ADJUSTING DEGREE OF ISOLATION, OPTICAL FIBER ISOLATOR, AND FIBER LASER

WIPO Patent Application WO/2019/000833

A1

A method for adjusting the degree of isolation, an optical fiber isolator, and a fiber laser. The method for adjusting the degree of isolation is applied to an optical fiber isolator. A magneto-optical rotation crystal (22) and a half-wave plate (24) are provided in the beam isolation structure (2) of the optical fiber isolator. The optical rotation angle of the magneto-optical rotation crystal (22) is represented by angle θ, where angle θ = K × λ × B × L; the half-wave plate (24) forward rotates the polarization direction of forward incident e polarized light and o polarized light by angle β when the magneto-optical rotation crystal (22) forward rotates the polarization direction of the forward incident e polarized light and o polarized light by angle θ. When angle θ changes, the half-wave plate (24) is rotated so that angle β is equal to angle θ. At this time, the magneto-optical rotation crystal (22) and the half-wave plate (24) have the maximum degree of isolation of reverse light. Also disclosed is a fiber laser comprising the optical fiber isolator. The optical fiber isolator facilitates simplification of the structure and improvement in use convenience.

CAO JILONG (CN)
ZHANG HAOTAI (CN)
TAO XINJUN (CN)
DENG JIE (CN)
FU ZHAOSEN (CN)
JIANG FENG (CN)

PCT/CN2017/113853

January 03, 2019

November 30, 2017

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MAXPHOTONICS CO LTD (CN)

G02F1/09

CN107238952A	2017-10-10
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CN103941341A	2014-07-23
CN106154422A	2016-11-23
CN102798989A	2012-11-28
CN104466626A	2015-03-25
CN204065464U	2014-12-31
US20030184861A1	2003-10-02

SL INTELLECTUAL PROPERTY CO., LTD. (CN)

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