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Proceedings Paper

Chiral fiber optical isolator
Author(s): Victor I. Kopp; Guoyin Zhang; Sheng Zhang; Azriel Z. Genack; Dan Neugroschl
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Paper Abstract

We propose an in-fiber chiral optical isolator based on chiral fiber polarizer technology and calculate its performance by incorporating the magnetic field into the scattering matrix. The design will be implemented in a special preform, which is passed through a miniature heat zone as it is drawn and twisted. The birefringence of the fiber is controlled by adjusted the diameter of a dual-core optical fiber. By adjusting the twist, the fiber can convert linear to circular polarization and reject one component of circular polarization. In the novel central portion of the isolator, the fiber diameter is large. The effective birefringence of the circular central core with high Verdet constant embedded in an outer core of slightly smaller index of refraction is small. The central potion is a non-reciprocal polarization converter which passes forward traveling left circularly polarized (LCP) light as LCP, while converting backward propagating LCP to right circularly polarized (RCP) light. Both polarizations of light traveling backwards are scattered out of the isolator. Since it is an all-glass structure, we anticipate that the isolator will be able to handle several watts of power and will be environmentally robust.

Paper Details

Date Published: 19 February 2009
PDF: 8 pages
Proc. SPIE 7195, Fiber Lasers VI: Technology, Systems, and Applications, 71950B (19 February 2009); doi: 10.1117/12.808311
Show Author Affiliations
Victor I. Kopp, Chiral Photonics, Inc. (United States)
Guoyin Zhang, Chiral Photonics, Inc. (United States)
Sheng Zhang, Chiral Photonics, Inc. (United States)
Azriel Z. Genack, Chiral Photonics, Inc. (United States)
Queens College of CUNY (United States)
Dan Neugroschl, Chiral Photonics, Inc. (United States)

Published in SPIE Proceedings Vol. 7195:
Fiber Lasers VI: Technology, Systems, and Applications
Denis V. Gapontsev; Dahv A. Kliner; Jay W. Dawson; Kanishka Tankala, Editor(s)

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