Depolarization of white light generated by ultrashort laser pulses in optical media

被引：24

作者：

Dharmadhikari, A. K. ^{[1
]}

Rajgara, E. A. ^{[1
]}

Mathur, D. ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

OPTICS LETTERS | 2006年 / 31卷 / 14期

关键词：

D O I：

10.1364/OL.31.002184

中图分类号：

O43 [光学];

学科分类号：

070207 [光学]; 0803 [光学工程];

摘要：

We report measurements of the extinction ratio (ER) of white light generated upon irradiation of BK7 glass by ultrashort (36 fs) laser pulses with incident power similar to 10(3) times larger than the critical power for self-focusing. At low incident powers, the continuum is symmetric about the incident laser wavelength; at high powers it becomes broader and distinctly asymmetric towards the blue side. We observe that ER degrades by 100-fold after the onset of multiphoton-induced free-electron generation (at incident intensity similar to 2 TW cm(-2)), which also corresponds to the onset of asymmetry in white-light spectra. (c) 2006 Optical Society of America.

引用

页码：2184 / 2186

页数：3

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