A study on fundamentals and applications of a fuzzy mode laser

本研究对模糊模激光器的振荡机理和应用进行了深入的研究，首次阐明了模糊模激光器的输出是由啁啾频率梳组成的，啁啾频率梳具有超快的啁啾速率，在激光器的输出中，啁啾频率梳的输出具有超快的啁啾速率和超快的啁啾速率，在激光器的输出中，啁啾频率梳的输出具有超快的啁啾速率和超快的啁啾速率（>200 PHz/s），（B）高频线性调频脉冲，和（c）高度相位相关的梳状分量。对模糊模式激光器进行了理论分析，并对模糊模式激光器的振荡机理进行了解释，模糊模式激光器的一个潜在应用是光频域反射（OFDR）。本课题的研究为实现模糊模式激光器远距离、高精度OFDR奠定了基础。实验中，在4km的距离上获得了50 μ m的空间精度。总之，本研究阐明了模糊模式激光器的振荡机理，并成功地展示了OFDR的应用。

In this research project, oscillation mechanisms and applications a fuzzy mode laser was extensively investigated.As to the oscillation mechanisms, we clarified for the first time that an output of the fuzzy mode laser consists of a chirped frequency comb. The chirped frequency comb has unique properties such as (a) ultra fast chirp rate (>200 PHz/s), (b) high frequency chirp linearity, and (c) highly phasecorrelated comb components. A theoretical analysis of the fuzzy mode laser was also carried out and it could explain well the oscillation mechanisms of the fuzzy mode laser.A potential application of the fuzzy mode laser is an optical frequency domain reflectometry (OFDR). In this reseach project, we establishied a basis needed to realize the long distance, high accuracy OFDR by the fuzzy mode laser. In the experiment, a spatial accuracy of 50 mum was obtained at the distance of 4km.In conclusion, this research clarified the oscillation mechanisms of the fuzzy mode laser, and an application of OFDR was successfully demonstrated.