By Topic

Single-Polarization Coupler Based on Air-Core Photonic Bandgap Fibers and Implications for Resonant Fiber Optic Gyro

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Huilian Ma ; Micro-Satellite Res. Center, Zhejiang Univ., Hangzhou, China ; Zhen Chen ; Zhonghe Jin

A single-polarization (SP) coupler based on air-core photonic bandgap fibers (PBFs) is proposed and numerically simulated. The physical mechanism is the decoupling phenomenon occurring at special separations between the cores of the dual-core PBFs called decoupling points. The coupling length of one polarization in the coupler tends to be infinite while the coupling length of other polarization remains in normal level. The coupling ratio for the primary polarization can vary by adjusting the length of the coupler since the other polarization is always decoupled out at any length of the coupler. When this novel SP coupler is incorporated into a PBFs based fiber ring resonator, its unique polarization property is theoretically simulated. In this full-PBFs configuration, the SP coupler functions as the power splitter and the polarizer simultaneously. By the finite element method, the feasibility of the SP coupler to filter the secondary eigenstate of polarization (ESOP) propagating in the resonator is proved. And the performance of the SP coupler to suppress the temperature-related polarization fluctuation in the resonant fiber optic gyro is promised to be more significant to the in-line polarizer integrating in the resonator. Furthermore, the mechanism of decoupling phenomenon in the SP coupler and the influence of polarization-axis angular misalignment are discussed. In conclusion, an optimized SP coupler can couple the primary ESOP properly, and a polarization extinct ratio larger than 30 dB can be achieved within the angular misalignment of 0.9 degree. The aforementioned unique properties make this novel SP coupler attractive for the resonant fiber optic gyro.

Published in:

Lightwave Technology, Journal of  (Volume:32 ,  Issue: 1 )