Fourier optics for acousto-optical spectrometers with nonlinearity correction of the Bragg cell frequency response

Roberto Ragazzoni; Vincenzo Natale

doi:10.1117/12.455104

8 February 2002 Fourier optics for acousto-optical spectrometers with nonlinearity correction of the Bragg cell frequency response

Roberto Ragazzoni, Vincenzo Natale

Author Affiliations +

Proceedings Volume 4486, Infrared Spaceborne Remote Sensing IX; (2002) https://doi.org/10.1117/12.455104
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Large, greater than about 1 Ghz, bandwidth acousto-optical spectrometers are based on Bragg cells made by LiNbO₃ working in birefringent regime. It is well known that the frequency response of this kind of cells is nonlinear. The purpose of this paper is the study of possible solutions for the correction of this nonlinearity. We studied several different optical design. We analyzed 3, 4 and 5 lenses optical design with particular care to distortions and quality of the reimaging. About distortion we designed some lenses slightly off-axis in order to achieve a partial compensation of the asymmetric distortion in the spectra introduced by the non-linear frequency response of the Bragg cell. A solution involving all cylindrical lenses is also briefly shown along with some practical drawback leading to the rejection of such an option. Finally a trade-off is performed in order to balance difficulty and cost of realization, the optical quality, and the true residual distortion. For multichannel Bragg cells the differential distortion between the various channels is also analyzed.

Citation Download Citation

Roberto Ragazzoni and Vincenzo Natale "Fourier optics for acousto-optical spectrometers with nonlinearity correction of the Bragg cell frequency response", Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002); https://doi.org/10.1117/12.455104

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available