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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4333–4336

Effect of extreme pump pulse reshaping on intense terahertz emission in lithium niobate at multimilliJoule pump energies

F. Blanchard, X. Ropagnol, H. Hafez, H. Razavipour, M. Bolduc, R. Morandotti, T. Ozaki, and D. G. Cooke  »View Author Affiliations


Optics Letters, Vol. 39, Issue 15, pp. 4333-4336 (2014)
http://dx.doi.org/10.1364/OL.39.004333


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Abstract

We report on terahertz (THz) generation via optical rectification in a room-temperature lithium niobate crystal under variable pump pulse durations, ranging from 100 to 300 fs, at 800 nm center wavelength. The efficiency for the process is predicted to have an order of magnitude increase when longer duration Fourier-limited pump pulses are used. Our results confirm this increase in efficiency, and we report a record 800 nm pump energy conversion efficiency of 0.35% with a saturation at >240fs pulse duration. While promising, our findings show a series of key problems that must be overcome before the theoretical limit can be achieved, including the influence of the pump bandwidth broadening due to the cascaded nonlinearity taking place within the crystal.

© 2014 Optical Society of America

OCIS Codes
(260.3090) Physical optics : Infrared, far
(300.6270) Spectroscopy : Spectroscopy, far infrared
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Spectroscopy

History
Original Manuscript: April 29, 2014
Revised Manuscript: June 16, 2014
Manuscript Accepted: June 16, 2014
Published: July 18, 2014

Citation
F. Blanchard, X. Ropagnol, H. Hafez, H. Razavipour, M. Bolduc, R. Morandotti, T. Ozaki, and D. G. Cooke, "Effect of extreme pump pulse reshaping on intense terahertz emission in lithium niobate at multimilliJoule pump energies," Opt. Lett. 39, 4333-4336 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-15-4333

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