[1] Guo X, Liu F, Xu X et al. Refractive index sensing characteristics of cladding-etched elliptical core polarization maintaining fiber based on intermodal interference[J]. Acta Optica Sinica, 35, 0706002(2015).

[2] Yan M X, Li J, Pei L et al. Function waveform generator based on birefringence characteristics of polarization maintaining fiber[J]. Acta Optica Sinica, 43, 0106001(2023).

[3] Fang S S, Wu X Q, Zhang G et al. High-sensitivity fiber optic temperature and strain sensors based on the vernier effect[J]. Chinese Journal of Lasers, 48, 0106004(2021).

[4] Eickhoff W. Temperature sensing by mode–mode interference in birefringent optical fibers[J]. Optics Letters, 6, 204-206(1981).

[5] Guan R F, Zhu F L, Gan Z Y et al. Stress birefringence analysis of polarization maintaining optical fibers[J]. Optical Fiber Technology, 11, 240-254(2005).

[6] Liu J, Zhu L Q, He W et al. Temperature-sensing characteristics of polarization-maintaining fiber Bragg grating inscribed directly by 800-nm femtosecond laser pulses[J]. Optical Fiber Technology, 56, 102186(2020).

[7] Zhao Y S, Sun B, Liu Y L et al. Polarization mode coupling and related effects in fiber Bragg grating inscribed in polarization maintaining fiber[J]. Optics Express, 24, 611-619(2016).

[8] Xiao H, Li H S, Wu B L et al. Polarization-maintaining terahertz bandgap fiber with a quasi-elliptical hollow-core[J]. Optics & Laser Technology, 105, 276-280(2018).

[9] Corsi A, Ho Chang J, Wang R H et al. Highly elliptical core fiber with stress-induced birefringence for mode multiplexing[J]. Optics Letters, 45, 2822-2825(2020).

[10] Zhao J J, Tang M, Oh K et al. Polarization-maintaining few mode fiber composed of a central circular-hole and an elliptical-ring core[J]. Photonics Research, 5, 261-266(2017).

[11] Xiao H, Li H S, Wu B L et al. Elliptical hollow-core optical fibers for polarization-maintaining few-mode guidance[J]. Optical Fiber Technology, 48, 7-11(2019).

[12] Xiao H, Li H S, Jian S S. Hole-assisted polarization-maintaining few-mode fiber[J]. Optics & Laser Technology, 107, 162-168(2018).

[13] Tan X L, Geng Y F, Zhou J. A novel ultrahigh birefringent hole-assistant microstructured optical fiber with low confinement loss[J]. Optics & Laser Technology, 43, 1331-1334(2011).

[14] Zhu W L, Yi Y T, Yi Z et al. High confidence plasmonic sensor based on photonic crystal fibers with a U-shaped detection channel[J]. Physical Chemistry Chemical Physics, 25, 8583-8591(2023).

[15] Hwang I K, Lee Y H, Oh K et al. High birefringence in elliptical hollow optical fiber[J]. Optics Express, 12, 1916-1923(2004).

[16] Jin W, Zhang X, Liu X Q. Highly birefringent one-air-hole panda fiber[J]. Optics Letters, 48, 1004-1007(2023).

[17] Liao S B, Luo T, Xiao R H et al. Preparation and laser properties of domestic Yb-doped polarization-maintaining fiber[J]. Chinese Journal of Lasers, 50, 0501002(2023).

[18] Zhai C X, Li Y, Wang S S et al. Study on high sensitivity measurement of seawater temperature based on bow Tie fiber[J]. Optical Fiber Technology, 76, 103252(2023).

[19] Chen S, Wang J. Fully degeneracy-lifted bow-tie elliptical ring-core multi-mode fiber[J]. Optics Express, 26, 18773-18782(2018).

[20] Guan R F, Li Z T, Gan Z Y et al. Analysis on stress and modal field of bow-tie and elliptical cladding polarization-maintaining optical fiber[J]. Chinese Journal of Quantum Electronics, 22, 277-281(2005).

[21] Ren F, Zhangsun T W, Huang X S et al. Design of 20-polarization-maintaining-mode“pseudo-rectangle”elliptical-core fiber for MIMO-less MDM networks[J]. Optical Fiber Technology, 50, 87-94(2019).

[22] Zhang T, Liu D Q, Tian S et al. Birefringence characteristic research of 40 micron supersmall diameter elliptical cladding type polarization maintaining fiber[J]. Proceedings of SPIE, 9274, 927420(2014).

[23] Song W J, Chen H Y, Wang J P et al. Panda type elliptical ring core few-mode fiber[J]. Optical Fiber Technology, 60, 102361(2020).

[24] Li H Y, Li X Y, Zhang Y et al. Design of high birefringence stress-induced polarization-maintaining fiber based on utilizing geometrical birefringence[J]. Optical Fiber Technology, 53, 102065(2019).

[25] Li M, Li X Y, Li H Y et al. Bow-tie holes-aided elliptical-core polarization-maintaining fiber with high birefringence[J]. Optical Fiber Technology, 73, 103073(2022).

[26] Ji M N, Chen D D, Huang L J. Integration method to calculate the stress field in the optical fiber[J]. Optics Communications, 403, 103-109(2017).

[27] Wen J X, Su W, Wu J et al. Stress-induced birefringence and structure optimization of PMF[J]. Optical Fiber & Electric Cable and Their Applications, 22-25(2008).

[28] Zheng K, Chang D Y, Fu Y J et al. Design and fabrication of Panda-type erbium-doped polarization-maintaining fibres[J]. Chinese Physics, 16, 478-484(2007).

[29] Jiang N, Li Z Z, Yang H Y et al. Birefringence analysis of polarization maintaining fiber and research on characteristic of all-fiber beat-length experimental systems[J]. Acta Optica Sinica, 32, 0706003(2012).

[30] Shen W B, Zhang D S. Influence of bending loss to demodulation on distributed fiber Raman temperature measurement[J]. Laser & Optoelectronics Progress, 60, 0506004(2023).