Open AccessSpectral resolution enhancement of acousto-optic tunable filter by double-filtering
Author(s) -
Chunguang Zhang,
Zhonghua Zhang,
Hao Wang,
Yu Yang
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.010234
Subject(s) - optics , filter (signal processing) , birefringence , spectral imaging , spectral resolution , resolution (logic) , quality (philosophy) , aperture (computer memory) , materials science , angular resolution (graph drawing) , optical filter , computer science , physics , spectral line , acoustics , computer vision , mathematics , artificial intelligence , quantum mechanics , astronomy , combinatorics
The development of the large angular aperture noncollinear acousto-optic tunable filter (AOTF) is based on the parallel tangents momentum-matching condition. In this letter, we have introduced a special double-filtering method that leads to an enhancement of the spectral resolution. And the birefringence together with the rotatory property of the interaction material has been considered to ensure the accuracy of designing an AOTF. The principle and availability of double-filtering are discussed in detail. It is confirmed that double-filtering method is effective to enhance the spectral resolution on the condition of keeping the quality of imaging, which is significant in practical applications of imaging AOTF.