[1] [1] DEVIKA V, RAJAN M S M. Hexagonal PCF of honeycomb lattice with high birefringence and high nonlinearity[J]. International journal of modern physics B, 2020, 34(10):2050094.

[2] [2] HOWLADER A H, ISLAM M S, RAZZAK S. Proposal for dispersion compensating square-lattice photonic crystal fiber[J]. Optoelectronics letters, 2021, 17(3): 160-164.

[3] [3] ZHANG Y, SHI C, GU C, et al. Liquid core photonic crystal fiber sensor based on surface enhanced Raman scattering[J]. Applied physics letters, 2007, 90(19):241.

[4] [4] LIU Y, XIA B Q, TAN H Y, et al. Numerical simulation of a neotype fluidic sensing system based on side-polished optical fiber[J]. Optoelectronics letters, 2020, 16(4):262-267.

[5] [5] LU X L, ZHANG X D, CHEN N, et al. A high linearity refractive index sensor based on D-shaped photonic-crystal fiber with built-in metal wires[J]. Optik-international journal for light and electron optics, 2020, 220:165021.

[6] [6] WANG Y, HUANG Q, ZHU W J, et al. Novel optical fiber SPR temperature sensor based on MMF-PCF-MMF structure and gold-PDMS film[J]. Optics express, 2018, 26(2):1910-1917.

[7] [7] LUAN N N, WANG R, LV W H, et al. Surface plasmon resonance temperature sensor based on photonic crystal fibers randomly filled with silver nanowires[J]. Sensors, 2014, 14(9):16035-16045.

[8] [8] DARYOUSH A S, PODDAR A, SUN T, et al. Optoelectronic oscillators:recent and emerging trends[J]. Microwave journal, 2018, 61(10):58-76.

[9] [9] YAO J. Optoelectronic oscillator for high speed and high-resolution optical sensing[J]. Journal of lightwave technology, 2017, PP(16):1-1.

[10] [10] PAUL D. A review of optoelectronic oscillators for high speed signal processing applications[J]. ISRN electronics, 2013, 2013:1-16.

[11] [11] NGUYEN L D, NAKATANI K, JOURNET B. Refractive index measurement by using an optoelectronic oscillator[J]. IEEE photonics technology letters, 2020, 22(12):857-859.

[12] [12] LIU J, WANG M, TANG Y, et al. Switchable optoelectronic oscillator using an FM-PS-FBG for strain and temperature sensing[J]. IEEE photonics technology letters, 2017, 29(23):2008-2011.

[13] [13] YANG Y, WANG M, SHEN Y, et al. Refractive index and temperature sensing based on an optoelectronic oscillator incorporating a Fabry-Perot fiber Bragg grating[J]. IEEE photonics journal, 2018, 10(1):1-9.

[14] [14] WU B L, WANG M G, DONG Y, et al. Magnetic field sensor based on a dual-frequency optoelectronic oscillator using cascaded magneto strictive alloy-fiber Bragg grating-Fabry Perot and fiber Bragg grating-Fabry Perot filters[J]. Optics express, 2018, 26(21):27628-27638.

[15] [15] GAO W L, ZHANG W H, TONG Z G, et al. Refractive index and temperature sensor based on optical fiber Mach-Zehnder interferometer with trapezoid cone[J]. Optical engineering, 2019, 58(5):057102.1-057102.5.

[16] [16] SEUNGHUN L, HYERIN S, HEESANG A, et al. Fiber-optic localized surface plasmon resonance sensors based on nanomaterials[J]. Sensors, 2021, 21(3):819.

[17] [17] CHEN X, XIA L, LI C. Surface plasmon resonance sensor based on a novel D-shaped photonic crystal fiber for low refractive index detection[J]. IEEE photonics journal, 2018, 10(1):1-9.

[18] [18] PANDA A, PUKHRAMBAM P D. Design and analysis of porous core photonic crystal fiber based ethylene glycol sensor operated at infrared wavelengths[J]. Journal of computational electronics, 2021, 20(4):1-15.