Polarization Axis Detection Technique of Polarization Maintaining Fiber Based on Symmetry Evaluation

2019 ◽  
Vol 39 (2) ◽  
pp. 0211001
Author(s):  
于文海 Yu Wenhai ◽  
冯迪 Feng Di ◽  
梁日 Liang Ri ◽  
宋凝芳 Song Ningfang
Keyword(s):  
Detection Technique ◽  
Polarization Axis ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining

Polarization Axis Measurement in Direct Coupling of Y Waveguide Modulator to the Polarization-Maintaining Fiber Coil

2015 ◽  
Vol 35 (11) ◽  
pp. 1112004
Author(s):  
甄洪旭 Zhen Hongxu ◽  
杨德伟 Yang Dewei ◽  
姚天龙 Yao Tianlong ◽  
宋凝芳 Song Ningfang
Keyword(s):  
Direct Coupling ◽  
Polarization Axis ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Fiber Coil ◽  
Waveguide Modulator

The Micro-Torsion Mechanism of Polarization Axis during Fabrication of Polarization Maintaining Fiber Devices

2010 ◽  
Vol 97-101 ◽  
pp. 1177-1180 ◽  
Author(s):  
Ci Jun Shuai ◽  
Shu Ping Peng ◽  
Xue Jun Wen
Keyword(s):  
Extinction Ratio ◽  
Fiber Axis ◽  
Primary Reason ◽  
Drawing Speed ◽  
Micro Cracks ◽  
Fiber Devices ◽  
Polarization Axis ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Scanning Electron

In order to explore the micro-torsion mechanism of polarization axis, we studied the microstructure of fused region and taper region of polarization maintaining(PM) fiber devices. Micro crystallizations were observed at the fused region on the fused region and the taper region of polarization maintaining fiber devices with scanning electron microscopy (SEM). The amount and size of the micro crystallizations are increased with decreasing drawing speed and their distribution is asymmetry along the fiber axis. Moreover, micro cracks were observed only at the taper region. The micro cracks became broader and deeper with increasing drawing speed and their distribution is also asymmetry along the fiber axis. The asymmetry of these microstructures is the primary reason that results in micro torsion during the fabrication process of polarization maintaining fiber devices and further deteriorates the optical performance, especially extinction ratio.

scholarly journals Group-Birefringence-Dispersion Measurements for Polarization-Maintaining Fibers Using a Kerr Phase-Interrogator

2020 ◽  
Vol 10 (24) ◽  
pp. 9031
Author(s):  
Yang Lu
Keyword(s):  
Group Delay ◽  
Laser Wavelength ◽  
Differential Group Delay ◽  
Optical Signals ◽  
Differential Group ◽  
Principal Axes ◽  
Polarization Maintaining Fiber ◽  
Elliptical Core ◽  
Polarization Maintaining ◽  
The Impact

A method which utilizes a Kerr phase-interrogator to measure the group birefringence dispersion (GBD) of a polarization-maintaining fiber (PMF) is systematically studied in this paper. The differential group delay of two sinusoidally modulated optical signals (SMOSs) polarized along the principal axes of the PMF is measured by a Kerr phase-interrogator, which leads to the group birefringence of the PMF. As the laser wavelength of the SMOSs varies, the group birefringence as a function of the laser wavelength is obtained, and the GBD is calculated as the derivative of the group birefringence with respect to the laser wavelength. The proposed method is experimentally demonstrated by characterizations of a Panda PMF with high GBD and an elliptical core PMF with low GBD, and its performance is analyzed. The proposed method eliminates the impact of the laser coherent length and allows for characterizing the GBD of PMFs that are tens of kilometers long.

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