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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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/11/461 |
| _version_ | 1827675668761018368 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:09:09Z |
| format | Article |
| id | doaj.art-95baf71bf344469e9090715fa58ea72f |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T05:09:09Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-95baf71bf344469e9090715fa58ea72f2023-11-23T01:00:52ZengMDPI AGPhotonics2304-67322021-10-0181146110.3390/photonics8110461A Novel Liquid Crystal-Filled, Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Communication BandYuwei Qu0Ying Han1Jinhui Yuan2Xian Zhou3Binbin Yan4Kuiru Wang5Xinzhu Sang6Chongxiu Yu7State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaSchool of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaResearch Center for Convergence Networks and Ubiquitous Services, University of Science & Technology Beijing (USTB), Beijing 100083, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaThis 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.https://www.mdpi.com/2304-6732/8/11/461liquid crystaldual-core photonic crystal fiberpolarization beam splitterextinction ratio |
| spellingShingle | 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 Photonics liquid crystal dual-core photonic crystal fiber polarization beam splitter extinction ratio |
| title | 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_short | 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 |
| topic | liquid crystal dual-core photonic crystal fiber polarization beam splitter extinction ratio |
| url | https://www.mdpi.com/2304-6732/8/11/461 |
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