Mapping of intermodal beat length distribution in an elliptical-core two-mode fiber based on Brillouin dynamic grating

被引：38
|
作者：
Kim, Yong Hyun [1 ]
Song, Kwang Yong [1 ]
机构：
[1] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 14期
基金：
新加坡国家研究基金会;
关键词：
POLARIZATION-MAINTAINING FIBERS; OPTICAL-FIBERS; MODE; FILTER; GENERATION; SENSOR;
D O I：
10.1364/OE.22.017292
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Distributed measurement and characterization of the intermodal beat length between LP01 and LP11 modes in an elliptical-core (e-core) two-mode fiber (TMF) are demonstrated by the analysis of Brillouin dynamic grating (BDG) spectra. The BDG is generated by the stimulated Brillouin scattering (SBS) of the LP01 mode and probed by the LP11 mode, with four different pairs of the spatial and polarization modes in the e-core TMF applied for the pump and the probe (LP01x-LP11y, LP01y-LP11y, LP01x-LP11x, and LP01y-LP11x). A mode selective coupler (MSC) is used for selective launch and retrieval of the LP01 and the LP11 modes in the BDG operation, and the local reflection spectra from the BDG are obtained by an optical time-domain analysis. A distribution map of the intermodal beat length is acquired for each pair of the pump-probe modes with a 1.5 m spatial resolution along a 75 m e-core TMF. Temperature-and strain-dependence of the BDG spectrum is also evaluated for each case. (C)2014 Optical Society of America
引用
收藏
页码：17292 / 17302
页数：11
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