[1] Zhang X P, Zhang Y X, Wang L et al. Current status and future of research and applications for distributed fiber optic sensing technology[J]. Acta Optica Sinica, 44, 0106001(2024).

[2] Liu C, Wang Y, Zhang Y X et al. Progress in optoelectronic detection technology for safe operation and maintenance of hydrogen energy storage and transportation equipment (invited)[J]. Acta Optica Sinica (Online), 1, 0414001(2024).

[3] Zhang X P[M]. Fully distributed optical fiber sensing technology(2013).

[4] Cao K Y, Li J, Zhang M J. Research progress on improving the temperature measurement accuracy of raman distributed fiber sensing[J]. Laser & Optoelectronics Progress, 61, 1700005(2024).

[5] Soto M A, Bolognini G, Di Pasquale F et al. Simplex-coded BOTDA fiber sensor with 1 m spatial resolution over a 50 km range[J]. Optics Letters, 35, 259-261(2010).

[6] Bao Y B, Sun J Q, Huang Q. Distributed fiber sensor based on Brillouin optical time domain reflection technique[J]. Laser & Optoelectronics Progress, 57, 210002(2020).

[7] Sun X Z, Yang Z S, Hong X B et al. Genetic-optimised aperiodic code for distributed optical fibre sensors[J]. Nature Communications, 11, 5774(2020).

[8] Wang Q L, Bai Q, Liang C S et al. Random coding method for SNR enhancement of BOTDR[J]. Optics Express, 30, 11604-11618(2022).

[9] Bi W H, Yang X P, Li J Y et al. Forward and backward Raman amplification of Brillouin scattering signal in Brillouin optical time domain reflectometer system[J]. Chinese Journal of Lasers, 41, 1205007(2014).

[10] Ma X J, Zhou L M, Cheng L H et al. Fast and long-distance Brillouin optical time-domain reflectometry based on Raman amplification[J]. Laser & Optoelectronics Progress, 56, 170617(2019).

[11] Lalam N, Ng W P, Dai X W et al. Performance analysis of Brillouin optical time domain reflectometry (BOTDR) employing wavelength diversity and passive depolarizer techniques[J]. Measurement Science and Technology, 29, 025101(2018).

[12] Li H, Li Y Q, Wang J J. Method to improve the performance of multi wavelength BOTDR sensing system[J]. Optical Communication Technology, 42, 25-28(2018).

[13] Domínguez-López A, López-Gil A, Martín-López S et al. Signal-to-noise ratio improvement in BOTDA using balanced detection[J]. IEEE Photonics Technology Letters, 26, 338-341(2014).

[14] Li Z L, Zhou Y, Hua Z X et al. Balanced detection for performance enhancement in a pulse-coded Brillouin optical time domain analyzer[J]. IEEE Sensors Journal, 23, 1166-1171(2023).

[15] Gao H R, Li Y Z, Guo L F et al. Research progress on signal noise reduction methods in distributed fiber optic sensing technology based on Brillouin scattering[J]. Laser & Optoelectronics Progress, 62, 0100009(2025).

[16] Li W Q, Bai Q, Zan W et al. SNR enhancement for BOTDA by DnCNN and pulse coding[J]. Chinese Journal of Lasers, 51, 1706004(2024).

[17] Soto M A, Ramírez J A, Thévenaz L. Intensifying Brillouin distributed fibre sensors using image processing[J]. Proceedings of SPIE, 9634, 96342D(2015).

[18] Soto M A, Ramírez J A, Thévenaz L. Intensifying the response of distributed optical fibre sensors using 2D and 3D image restoration[J]. Nature Communications, 7, 10870(2016).

[19] Weickert J. Coherence-enhancing diffusion filtering[J]. International Journal of Computer Vision, 31, 111-127(1999).

[20] Wu Z J, Wang Q, Wu Z H et al. Total variation-regularized weighted nuclear norm minimization for hyperspectral image mixed denoising[J]. Journal of Electronic Imaging, 25, 013037(2016).

[21] Cai Y F, Chen T Y, Wang J et al. Image noise reduction in computed tomography with non-local means algorithm based on adaptive filtering coefficients[J]. Acta Optica Sinica, 40, 0710001(2020).

[22] Horiguchi T, Kurashima T, Tateda M. Tensile strain dependence of Brillouin frequency shift in silica optical fibers[J]. IEEE Photonics Technology Letters, 1, 107-108(1989).

[23] Kurashima T, Horiguchi T, Izumita H et al. Brillouin optical-fiber time domain reflectometry[J]. IEICE Transactions on Communications, 382-390(1993).

[24] Zhou D W, Dong Y K, Wang B Z et al. Single-shot BOTDA based on an optical chirp chain probe wave for distributed ultrafast measurement[J]. Light: Science & Applications, 7, 32(2018).

[25] Bai Q, Wang Q L, Wang D et al. Recent advances in Brillouin optical time domain reflectometry[J]. Sensors, 19, 1862(2019).

[26] Liu X Y, Chen L P, Chen Y M et al. Detection accuracy improvement of compact and low-cost BOTDR system using locally stimulated scattering excitation[J]. Acta Optica Sinica, 44, 1106006(2024).

[27] Buades A, Coll B, Morel J M. A non-local algorithm for image denoising[C], 60-65(2005).

[28] Shao Z F, Liu J, Cheng Q M. Fusion of infrared and visible images based on focus measure operators in the curvelet domain[J]. Applied Optics, 51, 1910-1921(2012).