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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Remote fiber sensor based on cascaded Fourier domain mode-locked laser
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Remote fiber sensor based on cascaded Fourier domain mode-locked laser

机译：基于级联傅里叶域锁模激光器的远程光纤传感器

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摘要

We propose a high-speed remote fiber Bragg grating (FBG) sensor interrogation system based on a 1.3-(mu)m cascaded Fourier-domain mode-locked (FDML) laser. It consists of multiple FBGs connected to an optical circulator in the laser cavity. The cascaded FDML laser with these multiple FBGs is operational when the scanning frequency of the fiber Fabry-Perot tunable filter matches the fundamental frequency of the laser cavity. Each FBG provides a separate laser cavity for the FDML laser. The scanning frequencies of each laser cavity are 30.5314, 31.5393, 32.7108, and 33.8023 kHz. Using the cascaded FDML laser, we measure the performance of the long-distance static strain FBG sensor interrogation system in both the time and spectral domains. The slope coefficients of the measured relative wavelength difference and the relative time delay from the static strain are found to be 0.95 pm/(mu)strain and 0.15 ns/(mu)strain, respectively. We also demonstrate the dynamic response of the interrogation system with 80-Hz modulation strain using the cascaded FDML laser. Thus, an FBG sensor interrogation system for high-speed and high-sensitivity long-distance monitoring systems can be realized using a cascaded FDML laser.
机译：我们提出了一种基于1.3μm级联傅立叶域锁模（FDML）激光器的高速远程光纤布拉格光栅（FBG）传感器询问系统。它由多个FBG组成，这些FBG连接到激光腔中的光环行器。当光纤Fabry-Perot可调滤波器的扫描频率与激光腔的基频相匹配时，具有这些多个FBG的级联FDML激光器可以工作。每个FBG为FDML激光器提供一个单独的激光腔。每个激光腔的扫描频率为30.5314、31.5393、32.7108和33.8023 kHz。使用级联的FDML激光器，我们在时域和光谱域中测量了长距离静态应变FBG传感器询问系统的性能。发现测得的相对波长差的斜率系数和相对于静态应变的相对时间延迟的斜率系数分别为0.95pm /μ应变和0.15ns /μ应变。我们还演示了使用级联FDML激光器对80 Hz调制应变的询问系统的动态响应。因此，可以使用级联的FDML激光器实现用于高速和高灵敏度远程监视系统的FBG传感器询问系统。

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