10吉赫兹再生锁模半导体光放大器光纤环形激光器及其线宽特性。

10 GHz regeneratively mode-locked semiconductor optical amplifier fiber ring laser and its linewidth characteristics.

作者信息

Yoshida Masato, Ono Atsushi, Nakazawa Masataka

机构信息

Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan.

出版信息

Opt Lett. 2007 Dec 15;32(24):3513-5. doi: 10.1364/ol.32.003513.

DOI:10.1364/ol.32.003513

PMID:18087526

Abstract

A 10 GHz regeneratively mode-locked semiconductor optical amplifier fiber ring laser with a picosecond pulse duration was newly constructed, and the linewidth change of a longitudinal mode was measured for various laser cavity lengths using a delayed self-heterodyne detection method. The detected line shape was approximately Gaussian for cavity lengths of 3.4-171 m. This result indicates that the laser linewidth depends strongly on thermal or acoustic cavity length fluctuations. The linewidth was proportional to the inverse square root of the cavity length, and a linewidth of 1.7 kHz was obtained for a cavity length of 171 m.

摘要

新构建了一台具有皮秒脉冲持续时间的10 GHz再生锁模半导体光放大器光纤环形激光器，并使用延迟自外差检测方法测量了不同激光腔长度下纵模的线宽变化。对于3.4 - 171 m的腔长度，检测到的线形近似为高斯形。该结果表明激光线宽强烈依赖于热或声学腔长度波动。线宽与腔长度的平方根成反比，对于171 m的腔长度，获得了1.7 kHz的线宽。