通过啁啾蓝光泵浦的非共线光学参量放大产生的可见波段窄带宽可调谐皮秒脉冲。

Narrow-bandwidth tunable picosecond pulses in the visible produced by noncollinear optical parametric amplification with a chirped blue pump.

作者信息

Co Dick T, Lockard Jenny V, McCamant David W, Wasielewski Michael R

机构信息

Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208, USA.

出版信息

Appl Opt. 2010 Apr 1;49(10):1880-5. doi: 10.1364/AO.49.001880.

DOI:10.1364/AO.49.001880

PMID:20357874

Abstract

Narrow-bandwidth (approximately 27 cm(-1)) tunable picosecond pulses from 480 nm-780 nm were generated from the output of a 1 kHz femtosecond titanium:sapphire laser system using a type I noncollinear optical parametric amplifier (NOPA) with chirped second-harmonic generation (SHG) pumping. Unlike a femtosecond NOPA, this system utilizes a broadband pump beam, the chirped 400 nm SHG of the Ti:sapphire fundamental, to amplify a monochromatic signal beam (spectrally-filtered output of a type II collinear OPA). Optimum geometric conditions for simultaneous phase- and group-velocity matching were calculated in the visible spectrum. This design is an efficient and simple method for generating tunable visible picosecond pulses that are synchronized to the femtosecond pulses.

摘要

利用具有啁啾二次谐波产生（SHG）泵浦的I型非共线光学参量放大器（NOPA），从1 kHz飞秒钛宝石激光系统的输出中产生了波长范围为480 nm至780 nm的窄带宽（约27 cm⁻¹）可调谐皮秒脉冲。与飞秒NOPA不同，该系统利用宽带泵浦光束，即钛宝石基频的啁啾400 nm SHG，来放大单色信号光束（II型共线OPA的光谱滤波输出）。计算了可见光谱中同时实现相位和群速度匹配的最佳几何条件。这种设计是一种高效且简单的方法，用于产生与飞秒脉冲同步的可调谐可见皮秒脉冲。