低阈值自启动飞秒钛宝石激光器。

Low-threshold self-starting femtosecond Ti:sapphire laser.

作者信息

Ling Weijun, Jia Yulei, Sun Jinghua, Wang Zhaohua, Wei Zhiyi

机构信息

Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.

出版信息

Appl Opt. 2006 Apr 10;45(11):2495-8. doi: 10.1364/ao.45.002495.

DOI:10.1364/ao.45.002495

PMID:16623246

Abstract

A low-threshold self-starting Kerr-lens mode-locked Ti:sapphire laser is demonstrated that uses a tight-focusing cavity design in conjunction with a semiconductor saturable-absorber mirror (SESAM). With 3% and 12% output couplers, we achieve mode-locking thresholds as low as 390 and 600 mW, respectively. Stable femtosecond laser pulses with average power of 114 mW are generated at a pump power of 1.2 W, which corresponds to a typical duration of 17 fs and bandwidth of 47 nm. Mode-locking operation is achieved in a pump power range of 600 mW to 4.8 W at an output coupling of 12%; the advantages of using a SESAM for low-power mode-locking operation are demonstrated.

摘要

展示了一种低阈值自启动克尔透镜锁模钛宝石激光器，它采用紧聚焦腔设计并结合半导体可饱和吸收镜（SESAM）。使用3%和12%的输出耦合器时，我们分别实现了低至390和600 mW的锁模阈值。在1.2 W的泵浦功率下产生了平均功率为114 mW的稳定飞秒激光脉冲，其典型脉宽为17 fs，带宽为47 nm。在12%的输出耦合情况下，在600 mW至4.8 W的泵浦功率范围内实现了锁模运转；证明了使用SESAM进行低功率锁模运转的优势。