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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 20, Iss. 9 — May. 1, 1995
  • pp: 1038–1040

Measurement of femtosecond pulses in the focal point of a high-numerical-aperture lens by two-photon absorption

M. Müller, J. Squier, and G. J. Brakenhoff  »View Author Affiliations


Optics Letters, Vol. 20, Issue 9, pp. 1038-1040 (1995)
http://dx.doi.org/10.1364/OL.20.001038


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Abstract

We demonstrate a method for the measurement of femtosecond optical pulses in the focal point of a high-NA lens, using interferometric autocorrelation through two-photon absorption. A chirp-free input pulse of 47 fs is found to broaden by ≈50% after focusing by a well-compensated objective. With proper prechirp compensation, the actual pulse width in the focus of such a lens system can be restored to (almost) its initial value. The unique value of the presented two-photon autocorrelation technique is its capability of measuring the actual pulse width at the focal point of a high-NA lens, an aspect that is of direct importance to two-photon imaging approaches, for example.

© 1995 Optical Society of America

History
Original Manuscript: September 12, 1994
Published: May 1, 1995

Citation
M. Müller, J. Squier, and G. J. Brakenhoff, "Measurement of femtosecond pulses in the focal point of a high-numerical-aperture lens by two-photon absorption," Opt. Lett. 20, 1038-1040 (1995)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-9-1038

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