Potvin Simon, Boudreau Sylvain, Deschênes Jean-Daniel, Genest Jérôme
Centre d'Optique, Photonique et Laser, Université Laval, Québec G1K 7P4, Canada.
Appl Opt. 2013 Jan 10;52(2):248-55. doi: 10.1364/AO.52.000248.
The correction of setup and laser instabilities in a single-comb interferometric measurement using optical sampling by laser-cavity tuning is investigated. A two-reference solution that allows full correction of the interferogram is presented. The technique is compared to a slightly simpler one-reference correction. For the one-reference case, all the subtleties involved in this partial correction and the dependence between the achievable measurement accuracy and the setup parameters are highlighted. The parameters considered are the comb bandwidth, the laser-frequency noise, the required spectral resolution, the cavity scan speed, and the length of the delay line. For both referencing approaches, experimental results using a fiber delay line of 10 km and a 100 MHz mode-locked laser with its repetition rate swept at 500 Hz are shown.
研究了在采用激光腔调谐光学采样的单梳干涉测量中设置和激光不稳定性的校正。提出了一种允许对干涉图进行完全校正的双参考解决方案。将该技术与一种稍简单的单参考校正方法进行了比较。对于单参考情况，突出了这种部分校正中涉及的所有微妙之处以及可实现的测量精度与设置参数之间的依赖性。所考虑的参数包括梳状带宽、激光频率噪声、所需的光谱分辨率、腔扫描速度和延迟线长度。对于这两种参考方法，均展示了使用10 km光纤延迟线和重复频率以500 Hz扫描的100 MHz锁模激光器的实验结果。
