[1] [1] S. J. Qiu, F. Zhou, X. Feng, F. Xu, and Y. Q. Lu, “Lead silicate fiber-based, refractive indexindependent temperature sensor,” Journal of Modern Optics, 2013, 60(10): 851–853.

[2] [2] K. Cao, Y. Liu, and S. Qu, “Compact fiber biocompatible temperature sensor based on a hermetically-sealed liquid-filling structure,” Optics Express, 2017, 25(24): 29597–29604.

[3] [3] G. Li, L. Ji, G. Li, J. Su, and C. Wu, “High-resolution and large-dynamic-range temperature sensor using fiber Bragg grating Fabry-Perot cavity,” Optics Express, 2021, 29(12): 18523–18529.

[4] [4] P. Chen, X. Shu, F. Shen, and H. Cao, “Sensitive refractive index sensor based on an assembly-free fiber multi-mode interferometer fabricated by femtosecond laser,” Optics Express, 2017, 25(24): 29896–29905.

[5] [5] G. An, S. Li, T. Cheng, X. Yan, X. Zhang, X. Zhou, et al., “Ultra-stable D-shaped optical fiber refractive index sensor with graphene-gold deposited platform,” Plasmonics, 2018, 14(1): 155–163.

[6] [6] X. Li, B. Culshaw, M. Yang, Y. Liao, A. Wang, J. Dai, et al., “Optical fiber humidity sensor with PVDF thin film as sensitive element,” Advanced Sensor Systems and Applications Iv, 2010, 7853: 705–711.

[7] [7] C. Li, X. Yu, W. Zhou, Y. Cui, J. Liu, and S. Fan, “Ultrafast miniature fiber-tip Fabry-Perot humidity sensor with thin graphene oxide diaphragm,” Optics Letters, 2018, 43(19): 4719–4722.

[8] [8] N. Wang, H. Zhang, X. Yu, X. Yin, Y. Li, Y. Du, et al., “Optical fiber Fabry-Perot humidity sensor filled with polyvinyl alcohol,” Sensors and Materials, 2021, 33(3): 105–1062.

[9] [9] X. Li, H. Zhang, C. Qian, Y. Ou, R. Shen, and H. Xiao, “A new type of structure of optical fiber pressure sensor based on polarization modulation,” Optics and Lasers in Engineering, 2020, 130: 106095.

[10] [10] Y. Zhao, N. Song, F. Gao, X. Xu, J. Liu, and C. Liu, “High-precision photonic crystal fiber-based pressure sensor with low-temperature sensitivity,” Optics Express, 2021, 29(20): 32453–32463.

[11] [11] J. M. Karanja, Y. Dai, X. Zhou, B. Liu, M. Yang, and J. Dai, “Femtosecond laser ablated FBG multitrenches for magnetic field sensor application,” IEEE Photonics Technology Letters, 2015, 27(16): 1717–1720.

[12] [12] Z. Liu, H. Cao, and F. Xu, “Fiber-optic Lorentz force magnetometer based on a gold-graphene composite membrane,” Applied Physics Letters, 2018, 112(20): 203504.

[13] [13] C. B. Yu, Y. Wu, C. Li, F. Wu, J. H. Zhou, Y. Gong, et al., “Highly sensitive and selective fiber-optic Fabry-Perot volatile organic compounds sensor based on a PMMA film,” Optical Materials Express, 2017, 7(6): 2111–2116.

[14] [14] S. Hu, G. Yan, C. Wu, and S. He, “An ethanol vapor sensor based on a microfiber with a quantum-dot gel coating,” Sensors (Basel), 2019, 19(2): 300.

[15] [15] A. Leal-Junior, A. Frizera, H. Lee, Y. Mizuno, K. Nakamura, T. Paixao, et al., “Strain, temperature, moisture, and transverse force sensing using fused polymer optical fibers,” Optics Express, 2018, 26(10): 12939–12947.

[16] [16] H. E. Joe, H. Yun, S. H. Jo, M. B. G. Jun, and B. K. Min, “A review on optical fiber sensors for environmental monitoring,” International Journal of Precision Engineering and Manufacturing-Green Technology, 2018, 5(1): 173–191.

[17] [17] Y. Liang, H. Zhang, H. Guo, W. Lin, and B. Liu, “Simultaneous measurement of temperature and magnetic field based on ionic-liquid-infiltrated side-hole fibers,” Journal of Lightwave Technology, 2021, 39(21): 7001–7007.

[18] [18] X. Dong, H. Zhang, B. Liu, and Y. Miao, “Tilted fiber Bragg gratings: Principle and sensing applications,” Photonic Sensors, 2011, 1(1): 6–30.

[19] [19] L. Tong, “Micro/nanofibre optical sensors: challenges and prospects,” Sensors, 2018, 18(3): 903.

[20] [20] J. H. Chen, D. R. Li, and F. Xu, “Optical microfiber sensors: sensing mechanisms, and recent advances,” Journal of Lightwave Technology, 2019, 37(11): 2577–2589.

[21] [21] N. A. Mortensen, S. Xiao, and J. Pedersen, “Liquid-infiltrated photonic crystals: enhanced light-matter interactions for lab-on-a-chip applications,” Microfluidics and Nanofluidics, 2007, 4(1–2): 117–127.

[22] [22] H. Xuan, J. Ju, M. Zhang, W. Jin, and Y. Liao, “In-fiber polarimeters based on hollow-core photonic bandgap fibers,” Optics Express, 2009, 17(15): 13246–51324.

[23] [23] J. Ma, J. Ju, L. Jin, and W. Jin, “A compact fiber-tip micro-cavity sensor for high-pressure measurement,” IEEE Photonics Technology Letters, 2011, 23(21): 1561–1563.

[24] [24] B. L. Li, D. R. Li, J. H. Chen, Z. Y. Liu, G. H. Wang, X. P. Zhang, et al., “Hollow core micro-fiber for optical wave guiding and microfluidic manipulation,” Sensors and Actuators B: Chemical, 2018, 262: 953–957.

[25] [25] A. D. Gomes, M. Becker, J. Dellith, M. I. Zibaii, H. Latifi, M. Rothhardt, et al., “Multimode Fabry-Perot interferometer probe based on vernier effect for enhanced temperature sensing,” Sensors (Basel), 2019, 19(3): 453.

[26] [26] J. L. Kou, S. J. Qiu, F. Xu, and Y. Q. Lu, “Demonstration of a compact temperature sensor based on first-order Bragg grating in a tapered fiber probe,” Optics Express, 2011, 19(19): 18452–18457.

[27] [27] J. Kou, S. Qiu, F. Xu, Y. Lu, Y. Yuan, and G. Zhao, “Miniaturized metal-dielectric-hybrid fiber tip grating for refractive index sensing,” IEEE Photonics Technology Letters, 2011, 23(22): 1712–1714.

[28] [28] J. L. Kou, M. Ding, J. Feng, Y. Q. Lu, F. Xu, and G. Brambilla, “Microfiber-based Bragg gratings for sensing applications: a review,” Sensors (Basel), 2012, 12(7): 8861–8876.

[29] [29] D. Li, N. Wang, T. Zhang, G. Wu, Y. Xiong, Q. Du, et al., “Label-free fiber nanograting sensor for real-time in situ early monitoring of cellular apoptosis,” Advanced Photonics, 2022, 4(1): 016001.

[30] [30] J. L. Kou, J. Feng, L. Ye, F. Xu, and Y. Q. Lu, “Miniaturized fiber taper reflective interferometer for high temperature measurement,’’Optics Express, 2010, 18(13): 14245–14250.

[31] [31] T. A. Dar, A. Agrawal, P. K. Sen, R. J. Choudhary, and P. Sen, “Thermo-optic coefficients of pure and Ni doped ZnO thin films,” Thin Solid Films, 2016, 603: 115–118.

[32] [32] H. M. O'bryan, L. G. Uitert, E. D. Kolb, and G. Zydzik, “Thermal expansion of ZnO,” Journal of the American Ceramic Society, 1978, 61: 269.