The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2014
Filed:
Jun. 21, 2012
Junji Iida, Tokyo, JP;
Junji Iida, Tokyo, JP;
SMM Precision Co., Ltd., Akita, JP;
Abstract
Provided is a polarization independent optical isolator including: wedge-shaped birefringent crystal plates each made of a LiNbOsingle crystal; a Faraday rotatormade of a magnetic garnet single crystal; and sapphire single crystal platesandbonded to light transmitting surfaces of the Faraday rotator, respectively. A light transmitting surface of each of the sapphire single crystal plates is formed in such a manner as to be offset from the c-plane of the sapphire single crystal plate. An incident angle θa of imaginary lighton each of the sapphire single crystal plates, and an offset angles θoff of the light transmitting surface from the c-plane of each sapphire single crystal plates are set within predetermined ranges, the imaginary lightbeing represented by a bisector of an angle formed by optical axes of the ordinary ray and the extraordinary ray.