激光与光电子学进展, 2019, 56 (17): 170632, 网络出版: 2019-09-05
基于四波混频的光纤激光器传感器增敏研究 
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Sensitivity Enhancement of Fiber Laser Sensors Using Four-Wave Mixing
图 & 表
图 3. 实验所用光栅反射谱。(a) CFBG反射谱;(b) PM-FBG反射谱
Fig. 3. Reflection spectra of grating used in experiment. (a) Reflection spectrum of CFBG; (b) reflection spectrum of PM-FBG
图 4. 实验输出光谱结果。(a) A传感装置输出光谱;(b) 50 min内A结构输出光谱;(c) B增敏装置输出光谱;(d) 50 min内B结构输出光谱
Fig. 4. Output spectral results of experiment. (a) Output spectrum of section A; (b) output spectrum of section A within 50 min; (c) output spectrum of section B; (d) output spectrum of section B within 50 min
图 5. 升温过程中光谱的变化。(a)不同温度下增敏装置输出光谱;(b)波长差变化情况
Fig. 5. Spectral changes in temperature rising. (a) Output spectra of sensitivity-enhancement device at different temperatures; (b) changes in wavelength difference
图 6. 温度传感响应。(a)抽运波长差Δλp;(b)第1阶FWM波长差Δλ1;(c)第2阶FWM波长差Δλ2;(d)第3阶FWM波长差Δλ3
Fig. 6. Responses of temperature sensing. (a) Pump wavelength difference Δλp; (b) 1st-FWM wavelength difference Δλ1; (c) 2nd-FWM wavelength difference Δλ2; (d) 3rd-FWM wavelength difference Δλ3
图 8. 输出波长对轴向应力的响应。(a)不同轴向应力下系统输出光谱;(b) λp、λs与轴向应力关系
Fig. 8. Responses of output wavelength to axial strain. (a) Output spectra of system at different strains; (b) λp and λs as functions of axial strain
表 14种波长差对温度的响应灵敏度及拟合曲线的拟合参数
Table1. Temperature sensitivities for four types of wavelength differences and parameters for their fitting curves
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刘哲, 邹喜华, 刘璞宇. 基于四波混频的光纤激光器传感器增敏研究[J]. 激光与光电子学进展, 2019, 56(17): 170632. Zhe Liu, Xihua Zou, Puyu Liu. Sensitivity Enhancement of Fiber Laser Sensors Using Four-Wave Mixing[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170632.
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