Brida D, Marangoni M, Manzoni C, Silvestri S De, Cerullo G
National Laboratory for Ultrafast and Ultraintense Optical Science--INFM-CNR, Dipartimento di Fisica, Politecnico di Milano, Milano, Italy.
Opt Lett. 2008 Dec 15;33(24):2901-3. doi: 10.1364/ol.33.002901.
Ultrabroadband mid IR pulses with energy as high as 2 microJ and tunability from 2 to 5 microm are generated as the idler beam of an 800 nm pumped optical parametric amplifier in periodically poled stoichiometric lithium tantalate. After bulk compression in a Ge plate and frequency-resolved-opticle-gating characterization, a pulse duration as low as 25 fs was measured, corresponding to two optical cycles of the 3.6 microm carrier wavelength.
在周期性极化化学计量比钽酸锂中，作为800 nm泵浦光参量放大器的闲频光束，产生了能量高达2微焦且调谐范围为2至5微米的超宽带中红外脉冲。在锗板中进行体压缩和频率分辨光学门控表征后，测得脉冲持续时间低至25飞秒，对应于3.6微米载波波长的两个光学周期。
