Birefringent filter synthesis by use of a digital filter design algorithm

RuiHong Chu, Graham Town

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
1 Downloads (Pure)


We present an efficient method for designing birefringent filters comprising a number of birefringent sections with equal length and arbitrary orientation between two polarizers and for producing a specified spectral response in transmission. The method uses a digital filter design algorithm (i.e., the Remez algorithm) to determine an optimal polynomial approximation to obtain a specified finite impulse response, and a layer-peeling algorithm to calculate the filter structure parameters. The design procedure is demonstrated for a 14-section bandpass filter with sidelobes below -40 dB. The influence of errors in length and orientation of the birefringent sections on the filter's spectral response is also discussed.

Original languageEnglish
Pages (from-to)3412-3418
Number of pages7
JournalApplied Optics
Issue number17
Publication statusPublished - 10 Jun 2002
Externally publishedYes

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