Distributed Analysis on the Spatial Mode Structure in a PANDA-Type Few-Mode Fiber By Brillouin Dynamic Gratings
- Authors
- Kim, Yong Hyun; Song, Kwang Yong
- Issue Date
- 15-Jan-2021
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Scattering; Probes; Optical fiber sensors; Optical fiber polarization; Couplers; Optical fiber communication; Birefringence; Brillouin scattering; gratings; polarization; optical fibers
- Citation
- JOURNAL OF LIGHTWAVE TECHNOLOGY, v.39, no.2, pp 612 - 619
- Pages
- 8
- Journal Title
- JOURNAL OF LIGHTWAVE TECHNOLOGY
- Volume
- 39
- Number
- 2
- Start Page
- 612
- End Page
- 619
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/52849
- DOI
- 10.1109/JLT.2020.3029856
- ISSN
- 0733-8724
1558-2213
- Abstract
- We present the experimental analysis on the spatial mode structure in a PANDA-type few-mode fiber (PANDA-FMF) by the intermodal operation of Brillouin dynamic grating (BDG). Polarization-maintaining mode selective couplers are newly developed to selectively launch different optical modes for the pump and probe waves, and the characterization of the intra- and intermodal Brillouin scatterings in the PANDA-FMF is demonstrated. Distributions of effective refractive index (ERI) differences between six guided modes (LP01x, LP01y, LP11(o)x, LP11(o)y, LP11(e)x, and LP11(e)y) are measured by optical time-domain analysis of the intermodal BDG reflection spectra, and a unique ERI hierarchy among LP11 modes with different lobe orientations and polarization directions is reported for the first time in the PANDA-FMF. The analysis on the origin of measured ERI hierarchy is also presented by numerical simulations on the effect of core ellipticity.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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