Cross-correlation technique for dispersion characterization of chirped volume Bragg gratings
Language
en
Article de revue
This item was published in
Applied optics. 2009-10-15, vol. 48, n° 30, p. 5786-5792
Optical Society of America
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Chirping
Volume gratings
Ultrafast lasers
Photorefractive materials
Ultrafast nonlinear optics
Pulse compression
Origin
Hal imported