On the estimation of absolute grating groove density and inter-grating groove density errors of laser pulse compression gratings

In this paper, experimental studies on estimation of absolute groove density of gratings and inter-grating groove density errors are reported with typical detector limited accuracies of ±0.23 lines mm −1 and ±0.005 lines mm −1 , respectively at groove density of ~1740 lines mm −1 of holographic lase...

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Bibliographic Details
Published in:Sadhana (Bangalore) 2019-03, Vol.44 (3), p.1-7, Article 59
Main Authors: Sharma, A K, Joshi, A S
Format: Article
Language:English
Subjects:
Density
Engineering
Gratings (spectra)
Optical components
Pulse compression
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Summary:In this paper, experimental studies on estimation of absolute groove density of gratings and inter-grating groove density errors are reported with typical detector limited accuracies of ±0.23 lines mm −1 and ±0.005 lines mm −1 , respectively at groove density of ~1740 lines mm −1 of holographic laser pulse compression gratings. A simple single detector based optical set-up with fixed optical elements to avoid mechanical eccentric errors, if any, due to goniometric movement of a rotatory stage, has been proposed to estimate absolute groove density of gratings. A modified Fizeau or a modified Michelson interferometer based optical set-up has been used to estimate inter-grating groove density errors of gratings. Various gratings from different manufacturers were examined for their absolute groove densities and inter-grating groove density errors.
ISSN:0256-2499
0973-7677
DOI:10.1007/s12046-018-1024-6