Mode-beating spectroscopy in a few-mode optical guide
- 19 July 1993
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 63 (3) , 284-286
- https://doi.org/10.1063/1.110079
Abstract
A mode‐coupling modulator is scanned along an optical waveguide. At the output of the guide spatial beats are observed. From their spatial frequencies ‖βm−βn‖ a self‐consistent set of propagation constants βm of the guided modes is derived in a manner similar to that used in atomic spectroscopy. The method is illustrated by magneto‐optic modulation of the six lowest modes of an optical fiber. Assignment of the βm to modal fields yields the core ellipticity and internal stress of the fiber.Keywords
This publication has 6 references indexed in Scilit:
- Selective mode injection and observation for few-mode fiber opticsApplied Optics, 1991
- Precision measurement of modal birefringence of highly birefringent fibers by periodic lateral forceApplied Optics, 1985
- Elasto-optic polarization measurement in optical fiberOptics Letters, 1981
- Evolution of polarization along a single-mode fiberApplied Physics Letters, 1977
- GRATING COUPLER FOR EFFICIENT EXCITATION OF OPTICAL GUIDED WAVES IN THIN FILMSApplied Physics Letters, 1970
- MODES OF PROPAGATING LIGHT WAVES IN THIN DEPOSITED SEMICONDUCTOR FILMSApplied Physics Letters, 1969