15 June 2015 Design of optical finite impulse response filter generating arbitrary spectrum output
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Proceedings Volume 9654, International Conference on Optics and Photonics 2015; 96541Z (2015) https://doi.org/10.1117/12.2180569
Event: International Conference on Optics and Photonics 2015, 2015, Kolkata, India
Abstract
In the present communication, a procedure for the synthesis of an optical finite impulse response (FIR) birefringent filter generating arbitrary spectral output is presented. The basic filter consists of a cascaded system of n identical retarders between two polarizers at the two ends. A mathematical model of the optical FIR filter is introduced using the FIR theory of digital filter design. The parameters determined by the synthesis procedure are the angles of the optic axes of the individual crystals and the angle of the output polarizer. Classical FIR filter design method along with the optical backward transfer technique has been used. Two different arbitrarily specified spectral output profiles have been studied. However, the method is equally applicable for any periodic transfer function whose corresponding impulse response is real and causal.
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Arijit Saha, Arijit Saha, Kallol Bhattacharya, Kallol Bhattacharya, Ajoy Kumar Chakraborty, Ajoy Kumar Chakraborty, } "Design of optical finite impulse response filter generating arbitrary spectrum output", Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 96541Z (15 June 2015); doi: 10.1117/12.2180569; https://doi.org/10.1117/12.2180569
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