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:
Feb. 14, 2012
Filed:
Sep. 20, 2010
Junji Iida, Tokyo, JP;
Junji Iida, Tokyo, JP;
SMM Precision Co., Ltd., Noshiro, JP;
Abstract
In an in-line optical isolator, a first polarization separation element, a Faraday rotatormade of a BIG film, and a second polarization separation elementare placed in that order. The isolator further includes a first optical fiber collimatorbeing placed at the forward-beam incident side of the first polarization separation elementand including a collimating lensand a first optical fiber, and a second optical fiber collimatorbeing placed at the forward-beam exit side of the second polarization separation elementand including a collimating lensand a second optical fiberconnected to a fiber amplifier. Also, an edge filter, which transmits light emitted from the first optical fiberand having a wavelength equal to an oscillation wavelength and which reflects light emitted from the first optical fiberand having wavelengths shorter than this wavelength, is placed between the second optical fiber collimatorand the second polarization separation element