Dharmadhikari, A. K. ; Rajgara, F. A. ; Mathur, D. (2006) Depolarization of white light generated by ultrashort laser pulses in optical media Optics Letters, 31 (14). pp. 2184-2186. ISSN 0146-9592
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Official URL: http://www.opticsinfobase.org/abstract.cfm?id=9048...
Related URL: http://dx.doi.org/10.1364/OL.31.002184
Abstract
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 ~103 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 ~2 TW cm-2), which also corresponds to the onset of asymmetry in white-light spectra.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Optical Society of America. |
| ID Code: | 77600 |
| Deposited On: | 13 Jan 2012 11:43 |
| Last Modified: | 13 Jan 2012 11:43 |
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