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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 20, Iss. 3 — Feb. 1, 1995
  • pp: 309–311

Space–time focusing of femtosecond pulses in a Ti:sapphire laser

Ivan P. Christov, Henry C. Kapteyn, Margaret M. Murnane, Chung-Po Huang, and Jianping Zhou  »View Author Affiliations


Optics Letters, Vol. 20, Issue 3, pp. 309-311 (1995)
http://dx.doi.org/10.1364/OL.20.000309


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Abstract

We present what is to our knowledge the first three-dimensional model of a femtosecond pulse propagating in a Ti:sapphire laser crystal, which includes dispersion, self-focusing, and finite response time of the medium and does not assume the slowly varying envelope approximation. The combined action of material dispersion and phase modulation leads to a dramatic space–time focusing on the pulse. Dispersion prevents catastrophic self-focusing and self-steepening of the pulse, even though the peak power of the pulse is much greater than the critical power for self-focusing filamentation. Extrapolation of these results to shorter-pulse durations shows that this space–time focusing mechanism can operate even for pulses with durations close to the response time of the Kerr nonlinearity.

© 1995 Optical Society of America

History
Original Manuscript: August 2, 1994
Published: February 1, 1995

Citation
Ivan P. Christov, Henry C. Kapteyn, Margaret M. Murnane, Chung-Po Huang, and Jianping Zhou, "Space–time focusing of femtosecond pulses in a Ti:sapphire laser," Opt. Lett. 20, 309-311 (1995)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-3-309

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