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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 9 — May. 1, 2014
  • pp: 2588–2591

Sub-20  fs μJ-energy pulses tunable down to the near-UV from a 1  MHz Yb-fiber laser system

Maximilian Bradler and Eberhard Riedle  »View Author Affiliations


Optics Letters, Vol. 39, Issue 9, pp. 2588-2591 (2014)
http://dx.doi.org/10.1364/OL.39.002588


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Abstract

Optical parametric amplifiers render widely tunable ultrashort pulses, but for full spectral coverage, complex mixing schemes are needed. In particular, the blue and near-UV part of the spectrum is not directly reached with the 800 nm pump from Ti:sapphire systems or the 1030 nm pump of Yb-based lasers. We combine third harmonic pumping at 343 nm with seeding by a second harmonic (SH) pumped continuum to tune a noncollinear optical parametric amplifier down to 395 nm. Together with a SH pumped branch, the full range from 395 to 970 nm is covered with 20 fs pulse length or less. Pulse energies up to the μJ-level with an average power of up to 200 mW at 200 kHz and 480 mW at 1 MHz are achieved. With additional frequency doubling, the full range down to 210 nm is reached without gap. Two-photon absorption in the amplifier crystal is discussed as the critical issue in UV-pumped systems.

© 2014 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(230.4480) Optical devices : Optical amplifiers

ToC Category:
Nonlinear Optics

History
Original Manuscript: February 25, 2014
Manuscript Accepted: March 24, 2014
Published: April 18, 2014

Citation
Maximilian Bradler and Eberhard Riedle, "Sub-20  fs μJ-energy pulses tunable down to the near-UV from a 1  MHz Yb-fiber laser system," Opt. Lett. 39, 2588-2591 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-9-2588

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