A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band
This paper proposes a novel liquid crystal-filled, dual core photonic crystal fiber polarization beam splitter (LC-DC-PCF PBS) based on the coupled mode theory of DC-PCF. The mode birefringence of odd and even modes, coupling lengths (<i>CL</i>s) of the X-polarization (X-pol) and Y-polar...
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MDPI AG
2021
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oai:doaj.org-article:95baf71bf344469e9090715fa58ea72f2021-11-25T18:42:57ZA Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band10.3390/photonics81104612304-6732https://doaj.org/article/95baf71bf344469e9090715fa58ea72f2021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/461https://doaj.org/toc/2304-6732This paper proposes a novel liquid crystal-filled, dual core photonic crystal fiber polarization beam splitter (LC-DC-PCF PBS) based on the coupled mode theory of DC-PCF. The mode birefringence of odd and even modes, coupling lengths (<i>CL</i>s) of the X-polarization (X-pol) and Y-polarization (Y-pol), and the corresponding coupling length ratio (<i>CLR</i>) of the proposed LC-DC-PCF PBS filled without LC E7 and with LC E7 are compared. The change rules of the <i>CLs</i> of the X-pol and Y-pol and <i>CLR</i> of the proposed LC-DC-PCF with wavelengths for different cladding microstructure parameters were investigated. The relationships between the X-pol and Y-pol normalized output powers in core A of the proposed LC-DC-PCF PBS and the propagation length at the wavelength of 1.604 μm are discussed. Finally, by studying the change of extinction ratio (<i>ER</i>) with wavelength, the LC-DC-PCF PBS <i>ER</i> of 60.3 and 72.2 dB at wavelengths 1.386 and 1.619 μm are achieved, respectively. The final splitting length (<i>L</i><sub>S</sub>) is 94 μm, and the splitting bandwidth is 349 nm (1.352~1.701 μm), covering the whole of the E + S + C + L + U communication bands. The proposed LC-DC-PCF PBS has good beam-splitting performance, such as ultra-short <i>L</i><sub>S</sub> and ultra-wide splitting bandwidth, with potential applications in laser, sensing, and communication systems.Yuwei QuYing HanJinhui YuanXian ZhouBinbin YanKuiru WangXinzhu SangChongxiu YuMDPI AGarticleliquid crystaldual-core photonic crystal fiberpolarization beam splitterextinction ratioApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 461, p 461 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
liquid crystal dual-core photonic crystal fiber polarization beam splitter extinction ratio Applied optics. Photonics TA1501-1820 |
| spellingShingle |
liquid crystal dual-core photonic crystal fiber polarization beam splitter extinction ratio Applied optics. Photonics TA1501-1820 Yuwei Qu Ying Han Jinhui Yuan Xian Zhou Binbin Yan Kuiru Wang Xinzhu Sang Chongxiu Yu A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band |
| description |
This paper proposes a novel liquid crystal-filled, dual core photonic crystal fiber polarization beam splitter (LC-DC-PCF PBS) based on the coupled mode theory of DC-PCF. The mode birefringence of odd and even modes, coupling lengths (<i>CL</i>s) of the X-polarization (X-pol) and Y-polarization (Y-pol), and the corresponding coupling length ratio (<i>CLR</i>) of the proposed LC-DC-PCF PBS filled without LC E7 and with LC E7 are compared. The change rules of the <i>CLs</i> of the X-pol and Y-pol and <i>CLR</i> of the proposed LC-DC-PCF with wavelengths for different cladding microstructure parameters were investigated. The relationships between the X-pol and Y-pol normalized output powers in core A of the proposed LC-DC-PCF PBS and the propagation length at the wavelength of 1.604 μm are discussed. Finally, by studying the change of extinction ratio (<i>ER</i>) with wavelength, the LC-DC-PCF PBS <i>ER</i> of 60.3 and 72.2 dB at wavelengths 1.386 and 1.619 μm are achieved, respectively. The final splitting length (<i>L</i><sub>S</sub>) is 94 μm, and the splitting bandwidth is 349 nm (1.352~1.701 μm), covering the whole of the E + S + C + L + U communication bands. The proposed LC-DC-PCF PBS has good beam-splitting performance, such as ultra-short <i>L</i><sub>S</sub> and ultra-wide splitting bandwidth, with potential applications in laser, sensing, and communication systems. |
| format |
article |
| author |
Yuwei Qu Ying Han Jinhui Yuan Xian Zhou Binbin Yan Kuiru Wang Xinzhu Sang Chongxiu Yu |
| author_facet |
Yuwei Qu Ying Han Jinhui Yuan Xian Zhou Binbin Yan Kuiru Wang Xinzhu Sang Chongxiu Yu |
| author_sort |
Yuwei Qu |
| title |
A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band |
| title_short |
A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band |
| title_full |
A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band |
| title_fullStr |
A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band |
| title_full_unstemmed |
A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication Band |
| title_sort |
novel liquid crystal-filled, dual-core photonic crystal fiber polarization beam splitter covering the e + s + c + l + u communication band |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/95baf71bf344469e9090715fa58ea72f |
| work_keys_str_mv |
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