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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 14 — Jul. 15, 2006
  • pp: 2184–2186

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

A. K. Dharmadhikari, F. A. Rajgara, and D. Mathur  »View Author Affiliations

Optics Letters, Vol. 31, Issue 14, pp. 2184-2186 (2006)

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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 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 2 TW cm 2 ), which also corresponds to the onset of asymmetry in white-light spectra.

© 2006 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.5940) Nonlinear optics : Self-action effects
(350.5500) Other areas of optics : Propagation

ToC Category:
Nonlinear Optics

Original Manuscript: March 10, 2006
Revised Manuscript: April 11, 2006
Manuscript Accepted: May 2, 2006

A. K. Dharmadhikari, F. A. Rajgara, and D. Mathur, "Depolarization of white light generated by ultrashort laser pulses in optical media," Opt. Lett. 31, 2184-2186 (2006)

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