NDLI: Achromatic transient-grating for FROG characterization

Content Provider	IEEE Xplore Digital Library
Author	Baynard, E. Faure, S. Blanchet, V.
Copyright Year	2011
Description	Author affiliation: LCAR-IRSAMC, UMR5589, CNRS, 118 route de Narbonne, Université Toulouse III, France (Baynard, E.; Faure, S.; Blanchet, V.)
Abstract	Due to the large range of molecular systems, femtochimistry requires tunability from the IR to the UV. This involves most of the time, a non-collinear optical parametric amplification [1] with three stages for gas phase femtochemistry to get tunability in the visible, followed by frequency mixing with the fundamental pulse or its second harmonic to reach the ultraviolet (UV). The main parameters for this application are the intensity, stability, quality of the spatial mode and polarisation. In general, the intensity is maximized by using crystals slightly oversized in thickness and stability is obtained by saturating the frequency mixing process. However artefacts on pump-probe signals, introduced mostly by a chirp of the pump, have been detected principally as a delay-shift or either on the lifetimes [2]. The majority of published works in femtochimistry are done with a cross-correlation time typically twice larger than what is expected from the respective bandwidth of the pump and probe. In order to minimize these chirps, the phase characteristics of the pulses need to be measured after each non-linear process to optimize the intensity without to destroy drastically the duration. The challenge is to get a characterization set-up versatile in wavelengths (from 800 nm to 197 nm), input energies (from few hundred of nJ to several 100µJ), divergences and polarisations. We have developed a frequency resolved optical gating based on a transient grating generated in Sapphire blade [3]. The input beam is divided in three parts (see figure 1) that are focused by a parabolic off-axis mirror (f= 50 mm) within the sapphire.
Starting Page	1
Ending Page	1
File Size	171967
Page Count	1
File Format	PDF
ISBN	9781457705335
e-ISBN	9781457705328
DOI	10.1109/CLEOE.2011.5942769
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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