Wieser Wolfgang, Biedermann Benjamin R, Klein Thomas, Eigenwillig Christoph M, Huber Robert
Lehrstuhl für BioMolekulare Optik, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstr. 67, 80538 Munich, Germany.
Opt Express. 2009 Dec 7;17(25):22871-8. doi: 10.1364/OE.17.022871.
We present a novel method to measure the chromatic dispersion of fibers with lengths of several kilometers. The technique is based on a rapidly swept Fourier domain mode locked laser driven at 50kHz repetition rate. Amplitude modulation with 400MHz and phase analysis yield the dispersion values over a 130nm continuous wavelength tuning range covering C and L band. The high acquisition speed of 10micros for individual wavelength-resolved traces Deltat(lambda) can reduce effects caused by thermal drift and acoustic vibrations. It enables real-time monitoring with update rates >100Hz even when averaging several hundred acquisitions for improved accuracy.
我们提出了一种测量长度达数千米光纤的色散的新方法。该技术基于一个以50kHz重复频率驱动的快速扫频傅里叶域锁模激光器。400MHz的幅度调制和相位分析可在覆盖C波段和L波段的130nm连续波长调谐范围内得出色散值。对于单个波长分辨迹线Δt(λ)，10微秒的高采集速度可减少热漂移和声振动所造成的影响。即使在为提高精度而对数百次采集进行平均时，它也能实现大于100Hz更新率的实时监测。
