Fabrication and characterization of chalcogenide polarization-maintaining fibers based on extrusion
Abstract
The fabrication and characterization of IR chalcogenide polarization-maintaining (PM) step-index optical fibers with elliptical-core and 1-in-line-core have been reported for the first time. An improved isolated co-extrusion method was used to fabricate these core-shaped PM fibers. The elliptical core had a horizontal radius of a = 3.66 μm, vertical radius of b = 1.83 μm and the 1-in-line core of a = 4.83 μm, b = 1.42 μm, respectively. Single-mode PM beam spots were observed for the elliptical-core and 1-in-line-core fibers in the near-field energy distributions. The highest values of birefringence of the elliptical-core and 1-in-line-core fibers are 2.09 × 10-4 at 2.7 μm and 3.272 × 10-4 at 2.8 μm, respectively. The extinction ratios of -3.7 dB and -2 dB were achieved in fibers of 0.5 m long with elliptical-core and 1-in-line-core, respectively.
- Publication:
-
Optical Fiber Technology
- Pub Date:
- December 2017
- DOI:
- 10.1016/j.yofte.2017.09.020
- Bibcode:
- 2017OptFT..39...26J
- Keywords:
-
- Chalcogenide glasses;
- Extrusion;
- Fibers;
- Polarization-maintaining;
- Elliptical-core;
- 1-in-line-core;
- Extinction ratio