[2] [2] PENG Pengchun, TSENG H Y , CHI S. A tunable dual-wavelength erbium-doped fiber ring laser using a self-seeded Fabry-Perot laser diode[J].IEEE Photonics Technology Letters,2003,15(5): 661-663.

[3] [3] PAN S, LOU C, GAO Y. Multiwavelength erbium-doped fiber laser based on inhomogeneous loss mechanism by use of a highly nonlinear fiber and a Fabry-Perot filter[J]. Optics Express, 2006, 14(3): 1113-1118.

[4] [4] YEH C H, CHOW C W, WU Y F, et al. Multiwavelength erbium-doped fiber ring laser employing Fabry-Perot etalon[J]. Optical Fiber Technology, 2009, 15(4): 344-347.

[5] [5] CZARSKE J, MULLER H. Heterodyne detection technique using stimulated Brillouin scattering and a multimode laser[J]. Opt. Lett., 1994(19): 1589-1591.

[6] [6] YANG X P, GAN J L, XU S H, et al. Temperature sensing based on a Brillouin fiber microwave generator[J]. Laser Physics, 2013, 23(4):045104-1-045104-4.

[7] [7] MOTIL A, BERGMAN A, TUR M. [INVITED]State of the art of Brillouin fiber-optic distributed sensing[J]. Optics & Laser Technology, 2016, 78: 81-103.

[8] [8] INGER V L, KASHYAP R. High sensitivity distributed temperature fiber sensor using stimulated Brillouin scattering[J]. Opt. Express, 2017, 25(26): 32591-32601.

[10] [10] ZHOU X, GE C, WEI Y, et al. A tunable multi-wavelength Brillouin-erbium fiber laser with fourfold Brillouin frequency spacing[J]. Optical & Quantum Electronics, 2017, 49(4): 166-1-166-8.

[11] [11] LIU Yi, SHANG Yao, YI Xiaogang, et al. Triple Brillouin frequency spacing Brillouin fiber laser sensor for temperature measurement[J]. Optical Fiber Technology, 2020, 54: 102106-1-102106-3.

[12] [12] LEZZI V L, LORANGER S, MAROIS M, et al. High-sensitivity temperature sensing using higher-order Stokes stimulated Brillouin scattering in optical fiber[J]. Opt. Lett., 2014, 39(4): 857-860.

[13] [13] ZHOU Xuefang, LI Zengyang, GE Chaoqun, et al. Multi-wavelength Brillouin erbium-doped fiber laser sensor with high tunable temperature sensing coefficient[J]. Optical and Quantum Electronics, 2019, 51(1): 14-1-14-14.

[14] [14] CHEN B, WANG T, JIA Q, et al. Highsensitive temperature sensing system based on multi-wavelength fiber laser with dispersion shifted fiber[J]. OSA Continuum, 2018, 1(2): 401-1-401-7.

[15] [15] SHANG Yao, GUO Rongrong, LIU Yi, et al. Managing Brillouin frequency spacing for temperature measurement with Brillouin fiber laser sensor[J]. Opt. Quant Electron, 2020, 52(4): 211-1-211-8.

[16] [16] ZHOU X, LIU Y, HU M, et al. Multi-wavelength brillouin fiber laser with triple brillouin frequency spacing[J]. IEEE Photonics Technology Letters, 2016, 28(21): 2379-2382.