,Application of Optical Kerr Gate with SrTiO3 Crystal in Acquisition of Gated Spectra from a Superco

• 作 者: YAN Li-He JIA Sen SI Jin-Hai MATSUO Shigeki CHEN Feng HOU Xun
• 机 构: Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab o
• 出 处: 中国物理快报（英文版）
• 发表日期: 2012年7期

We investigate the optical Kerr effect of SrTiO3 (STO) crystal,of which the nonlinear response time was measured to be less than 200fs,while the nonlinear refractive index is estimated to be 2.16 x 10-15 cm2/W.Using theoptical Kerr gate (OKG) technique with an STO crystal as the Kerr medium,we obtain narrow-bandwidth and symmetric gated spectra from a supercontinuum generated in distilled water by a femtosecond laser.The experimental results show superiority compared with the gated spectra obtained using OKG with CS2 as the Kerr medium,demonstrating that STO crystal is a promising OKG medium.