Title:
OPTICAL ISOLATOR
Document Type and Number:
WIPO Patent Application WO/2017/187886
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical isolator with which costs are reduced, which occupies less space, which is lightweight, and for which the reliability of a bond between the optical isolator and a member is high regardless of the effect of thermal expansion and so forth. The present invention provides an optical isolator that includes: an optical isolator chip (7) in which a first polarizer (3), a Faraday rotator (4) composed of a ferromagnetic substance, and a second polarizer (5) are bonded and fixed to each other in this order; and a magnet (12) that is for applying a magnetic field to the optical isolator chip (7). An incident end surface or an emission end surface of the optical isolator chip (7) is bonded and fixed to a member (11). The center of magnetic flux formed by the magnet (12) on the optical axis of the optical isolator is located closer to the end surface of the optical isolator chip (7) that is bonded and fixed to the member (11) than a center position of the Faraday rotator (4) along the optical axis. Due to this configuration, an optical isolator is provided for which the reliability of the bond between the optical isolator and the member (11) is high.
Inventors:
WATANABE TOSHIAKI (JP)
Application Number:
PCT/JP2017/013558
Publication Date:
November 02, 2017
Filing Date:
March 31, 2017
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
G02B27/28; G02F1/09
Foreign References:
| JP2003255270A | 2003-09-10 | |||
| JP2011215571A | 2011-10-27 | |||
| JP2015064407A | 2015-04-09 | |||
| JP2005242347A | 2005-09-08 | |||
| JP2004325606A | 2004-11-18 | |||
| JPH0854579A | 1996-02-27 | |||
| JP2006011019A | 2006-01-12 |
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (JP)
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