Ultrawide bandwidth dual sakura hollow-core antiresonant fiber polarization beam splitter
- 20 October 2021
- journal article
- research article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 38 (11), 3395-3402
- https://doi.org/10.1364/josab.432644
Abstract
A dual sakura hollow-core antiresonant fiber (DSHC-ARF) is proposed for developing an ultrawide-bandwidth polarization beam splitter (PBS). An air gap is introduced into the fiber between dual sakura hollow cores acting as a mode-coupling channel, which determines the implementation of a DSHC-ARF-based PBS. We demonstrate the wavelength dependence of coupling length can be reduced by introducing nested tubes and investigate their impact on single-mode operation further. Through optimizing the fiber, a high-performance PBS based on a 4.42 cm long DSHC-ARF can be obtained with an ultrawide bandwidth of 460 nm ranging from 1400 to 1860 nm, good single-mode operation with a higher-order mode extinction ratio above 100, and a low fundamental mode loss below 0.543 dB.Keywords
Funding Information
- National Natural Science Foundation of China (12174022)
- Key Project of Hebei Natural Science Foundation (F2018202323)
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