飞秒
材料科学
光学
物理
极化(电化学)
激光器
非线性光学
非线性系统
分子物理学
线极化
超连续谱
作者
Ali Alshehri,El Sayed Yousef,A. A. Alshahrani,A. Ibrahim,Nafis Ahmad,V. R. Bhardwaj
标识
DOI:10.1134/s0030400x20080056
摘要
We present differential nonlinear absorption of an elliptically polarized femtosecond laser vortex beam carrying an angular momentum of
$$\ell = - 1$$
in tellurite glass. Transmission measurements were utilized to measure the nonlinear absorption of the glasson a shot-by-shot basis, and to investigate the modification threshold for the beam. Additionally, the effect of pulse energy on the polarization ellipse was investigated. The results revealed a reduction in the ellipticity as the incident pulse energy was increased. Non-rotation of the ellipsoid indicated that there is no change in the third order nonlinear susceptibility (
$${{\chi }^{{(3)}}}$$
) of the telluride glass upon irradiation by the femtosecond beam. The transmission of multiple pulses through the same spot revealed that although an effect was evident for the first ten pulses, the subsequent pulses had no effect. The transmission of a complete cycle of increasing and decreasing pulse energies revealed no hysteresis of the femtosecond laser vortex beam in tellurite glass in contrast to that reported for Gaussian beams in silica glass.
科研通智能强力驱动
Strongly Powered by AbleSci AI