从远离增益峰的钛宝石激光器产生30飞秒、900 - 970纳米的脉冲。

Generation of 30 femtosecond, 900-970 nm pulses from a Ti:sapphire laser far off the gain peak.

作者信息

Ruppert Claudia, Betz Markus

机构信息

Physik-Department E11, Technische Universität München, James-Franck-Str., 85748 Garching, Germany.

出版信息

Opt Express. 2008 Apr 14;16(8):5572-6. doi: 10.1364/oe.16.005572.

DOI:10.1364/oe.16.005572

PMID:18542660

Abstract

A 58 MHz femtosecond Ti:sapphire oscillator is optimized for long wavelength operation beyond 900 nm. Sub 30 fs, approximately 3 nJ pulses with a bandwidth exceeding 20 THz are realized for central wavelengths 900 nm < or = lambda < or = 960 nm. This laser opens up new perspectives for the sensitive time-resolved spectroscopy of various semiconductor nanostructures. Moreover, its second harmonic serves as a source of visible multi-milliwatt femtosecond pulses tunable around 475 nm.

摘要

一台58兆赫兹的飞秒钛宝石振荡器针对900纳米以上的长波长运行进行了优化。对于中心波长900纳米≤λ≤960纳米，实现了脉宽低于30飞秒、能量约为3纳焦且带宽超过20太赫兹的脉冲。该激光器为各种半导体纳米结构的灵敏时间分辨光谱学开辟了新的前景。此外，其二次谐波可作为在475纳米左右可调谐的可见多毫瓦飞秒脉冲源。