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Optics Letters

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  • Vol. 21, Iss. 3 — Feb. 1, 1996
  • pp: 192–194

Broadband spatial mode conversion by chirped fiber bending

Dan Östling and Helge E. Engan  »View Author Affiliations


Optics Letters, Vol. 21, Issue 3, pp. 192-194 (1996)
http://dx.doi.org/10.1364/OL.21.000192


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Abstract

We solve the coupled-mode equations for linearly chirped codirectional mode couplers and use the results to develop design rules for broadband couplers. By comparing a chirped coupler with a uniform coupler having the same effective coupling length we find that high coupling efficiency can be obtained over a substantially wider bandwidth. We design a chirped device to have a 99% bandwidth of 47 nm at 1090 nm, which is 5.8 times larger than for the uniform coupler. Experimentally the bandwidth was improved by a factor of 5.4.

© 1996 Optical Society of America

History
Original Manuscript: September 9, 1995
Published: February 1, 1996

Citation
Dan Östling and Helge E. Engan, "Broadband spatial mode conversion by chirped fiber bending," Opt. Lett. 21, 192-194 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-3-192


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