Broadband spatial mode conversion by chirped fiber bending

被引：25

作者：

Ostling, D

Engan, HE

机构：

[1] Fac. of Elec. Eng. and Comp. Science, Norwegian Univ. of Sci. and Technol.

来源：

OPTICS LETTERS | 1996年 / 21卷 / 03期

关键词：

D O I：

10.1364/OL.21.000192

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. Optical Society of America

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页码：192 / 194

页数：3

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