Publications by authors named "Guilmot Ernotte"

2 Publications

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Study of middle infrared difference frequency generation using a femtosecond laser source in LGT.

Opt Lett 2017 Sep;42(18):3698-3701

We demonstrate phase-matched difference frequency generation in the emerging nonlinear crystal LaGaTaO. Tunable wavelengths between 1.4 and 4.7 μm are generated by using femtosecond sources. We also report on the measurements of the optical damage threshold in the femtosecond regime and on the nonlinear refractive index n.
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http://dx.doi.org/10.1364/OL.42.003698DOI Listing
September 2017

Decoupling Frequencies, Amplitudes and Phases in Nonlinear Optics.

Sci Rep 2017 08 11;7(1):7861. Epub 2017 Aug 11.

INRS-EMT, 1650 Blvd. Lionel Boulet, Varennes, J3X1S2, Qc, Canada.

In linear optics, light fields do not mutually interact in a medium. However, they do mix when their field strength becomes comparable to electron binding energies in the so-called nonlinear optical regime. Such high fields are typically achieved with ultra-short laser pulses containing very broad frequency spectra where their amplitudes and phases are mutually coupled in a convolution process. Here, we describe a regime of nonlinear interactions without mixing of different frequencies. We demonstrate both in theory and experiment how frequency domain nonlinear optics overcomes the shortcomings arising from the convolution in conventional time domain interactions. We generate light fields with previously inaccessible properties by avoiding these uncontrolled couplings. Consequently, arbitrary phase functions are transferred linearly to other frequencies while preserving the general shape of the input spectrum. As a powerful application, we introduce deep UV phase control at 207 nm by using a conventional NIR pulse shaper.
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http://dx.doi.org/10.1038/s41598-017-07510-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5554166PMC
August 2017