ANDRUSYAK, Oleksiy; CANIONI, Lionel; COHANOSHI, Ion; ROTARI, Eugeniu; SMIRNOV, Vadim; VENUS, George; GLEBOV, Leonid

doi:10.1364/AO.48.005786

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ANDRUSYAK, Oleksiy
The College of Optics and Photonics [Orlando] [CREOL]

CANIONI, Lionel
Centre de physique moléculaire optique et hertzienne [CPMOH]

COHANOSHI, Ion
OptiGrate

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Applied optics. 2009-10-15, vol. 48, n° 30, p. 5786-5792

Optical Society of America

Résumé en anglais

We propose using cross-correlation frequency-resolved optical gating for dispersion characterization of optical elements with high dispersion, such as ultrashort pulse stretchers and compressors. The technique is based on spectrally resolved second-order cross correlation (sum frequency generation) of a stretched pulse with a reference short pulse. Dispersion of optical elements with a high pulse stretching ratio can be completely characterized using this method, even with moderate resolution of spectral measurements of the cross-correlation signal. The proposed technique is used to measure dispersion of a chirped Bragg grating recorded in photo-thermo-refractive glass. It was found that dispersion of these gratings is almost linear with wavelength and has approximately the same slope with opposite signs for two orientations of the grating with opposite faces of the grating used as the input face. Analysis of higher-order dispersion of the grating shows some variations of dispersion across the aperture of the grating, mostly in the amount of third-order dispersion contribution.< Réduire

Mots clés en anglais

Chirping

Volume gratings

Ultrafast lasers

Photorefractive materials

Ultrafast nonlinear optics

Pulse compression

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Cross-correlation technique for dispersion characterization of chirped volume Bragg gratings

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