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Optics Letters

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  • Vol. 26, Iss. 9 — May. 1, 2001
  • pp: 614–616

Generation of sub-6-fs blue pulses by frequency doubling with quasi-phase-matching gratings

L. Gallmann, G. Steinmeyer, U. Keller, G. Imeshev, M. M. Fejer, and J.-P. Meyn  »View Author Affiliations


Optics Letters, Vol. 26, Issue 9, pp. 614-616 (2001)
http://dx.doi.org/10.1364/OL.26.000614


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Abstract

We demonstrate the generation of sub-6-fs pulses centered at 405 nm by frequency doubling of 8.6-fs Ti:sapphire laser pulses. The frequency doubling is carried out in a nonlinearly chirped quasi-phase-matching grating fabricated in a lithium tantalate substrate. This device simultaneously provides frequency conversion and pulse compression of the positively prechirped fundamental pulses. The second-harmonic pulses are characterized in a cross-correlation setup, and their pulse shapes are retrieved by two iterative phase-reconstruction algorithms. The generated second-harmonic spectrum spans a bandwidth of 220 THz. To our knowledge, these are the shortest pulses ever generated in the blue spectral region.

© 2001 Optical Society of America

OCIS Codes
(190.4360) Nonlinear optics : Nonlinear optics, devices
(320.5550) Ultrafast optics : Pulses

Citation
L. Gallmann, G. Steinmeyer, U. Keller, G. Imeshev, M. M. Fejer, and J.-P. Meyn, "Generation of sub-6-fs blue pulses by frequency doubling with quasi-phase-matching gratings," Opt. Lett. 26, 614-616 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-9-614


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References

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