Saperstein R E, Alic N, Zamek S, Ikeda K, Slutsky B, Fainman Y
Opt Express. 2007 Nov 12;15(23):15464-79. doi: 10.1364/oe.15.015464.
The inclusion of a linear chirped fiber Bragg grating for short pulse dispersion is shown to enhance the time domain realization of optical frequency-domain reflectometry. A low resolution demonstrator is constructed with single surface scans containing 140 resolvable spots. The system dynamic range meets that shown in earlier demonstrations without digital post-processing for signal linearization. Using a conjugate pair of chirped pulses created by the fiber grating, ranging is performed with position and velocity information decoupled. Additionally, by probing the target with short pulses and introducing grating dispersion just before photodetection, velocity immune ranging is demonstrated.
结果表明，包含用于短脉冲色散的线性啁啾光纤布拉格光栅可增强光频域反射仪的时域实现。构建了一个低分辨率演示器，其单面扫描包含140个可分辨的点。该系统的动态范围与早期演示中所示的范围相同，无需进行数字后处理来实现信号线性化。利用光纤光栅产生的一对共轭啁啾脉冲，在位置和速度信息解耦的情况下进行测距。此外，通过用短脉冲探测目标并在光电探测之前引入光栅色散，演示了速度免疫测距。
