Polarization instability in a twisted birefringent optical fiber
| Autor: | Sandra F. Feldman, Doreen A. Weinberger, Herbert G. Winful |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Physics
Optical fiber Birefringence Polarization rotator business.industry Single-mode optical fiber Physics::Optics Statistical and Nonlinear Physics Polarization-maintaining optical fiber Graded-index fiber Atomic and Molecular Physics and Optics law.invention Optics law Dispersion-shifted fiber business Circular polarization |
| Zdroj: | Journal of the Optical Society of America B. 10:1191 |
| ISSN: | 1520-8540 0740-3224 |
| DOI: | 10.1364/josab.10.001191 |
| Popis: | The fast-axis polarization instability arises in a weakly birefringent fiber as a result of competition between the natural fiber birefringence and the nonlinear ellipse rotation. Direct observation of the fast-axis polarization instability is reported. A full theoretical development of the polarization instability in a twisted, birefringent optical fiber is presented. The theory includes the derivation of and full solutions for the evolution of light in a twisted fiber as well as stability analysis and phase-plane representation of the solutions. The experiment is described in detail; good agreement is obtained between theory and experiment. As a result of the instability, very small variations in either the input power or the input polarization to the fiber result in large changes in the output polarization. A crossed polarizer at the fiber end converts the polarization variation into intensity information. Thus the modulation depth of an input pulse has been increased from 15% to 100%. Modulation gains of as much as 10 times are theoretically possible. |
| Databáze: | OpenAIRE |
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