Schmidt Bruno E, Unrau Waldemar, Mirabal Aldo, Li Shaohui, Krenz Marcel, Wöste Ludger, Siebert Torsten
Institut für Experimentalphysik, Freie Universität Berlin, Berlin, Germany.
Opt Express. 2008 Nov 10;16(23):18910-21. doi: 10.1364/oe.16.018910.
A practicable and economic method for the generation and full characterization of laser pulses ranging down to sub 7 fs duration with energies spanning the full microJ domain is presented. The method utilizes a self-induced and self-guiding filamentation of titanium-sapphire based, amplified pulses in air for spectral broadening, a standard chirp mirror compression scheme and transient grating frequency resolved optical gating for determining the spectral phase over the full visible to near infrared range. In this manner, few-cycle laser pulses with a high quality in the spatial beam profile have been generated in an robust arrangement with a minimal amount of standard optical components for their full characterization. The optical scheme demonstrates an uncomplicated, versatile access to this regime of pulsed laser radiation accompanied by a comprehensive analysis.
本文提出了一种可行且经济的方法，用于产生和全面表征持续时间低至亚7飞秒、能量跨越整个微焦域的激光脉冲。该方法利用基于钛宝石的放大脉冲在空气中的自诱导和自引导丝状化进行光谱展宽，采用标准的啁啾镜压缩方案以及瞬态光栅频率分辨光学门控来确定整个可见光到近红外范围内的光谱相位。通过这种方式，已经以一种稳健的配置产生了空间光束轮廓高质量的少周期激光脉冲，并且用于其全面表征的标准光学元件数量最少。该光学方案展示了一种简单、通用的方式来获得这种脉冲激光辐射状态，并伴随着全面的分析。
