Liquid-crystal-based Fourier optical spectrum analyzer without moving parts

    Authors

    Y. Q. Lu; F. Du; Y. H. Wu;S. T. Wu

    Comments

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    Abbreviated Journal Title

    Jpn. J. Appl. Phys. Part 1 - Regul. Pap. Brief Commun. Rev. Pap.

    Keywords

    liquid crystal devices; Fourier transform spectrometer; Fourier series; dense wave length-division multiplexing (DWDM); birefringent filter; TRANSFORM SPECTROMETER; TECHNOLOGY; Physics, Applied

    Abstract

    We propose and demonstrate a liquid-crystal (LC)-based Fourier optical spectrum analyzer (FOSA). The FOSA consists of a birefringent filter array with an embedded LC phase modulator. The LC phase modulator. is used to control the phase difference between two orthogonally polarized beams to avoid mechanical movement in conventional Fourier transform spectrometers. The detailed operation principle,of this FOSA is described. A single-LC-based 6-stage FOSA is experimentally demonstrated, and the results obtained using such a FOSA show good agreement with the results measured using a reference spectrometer.

    Journal Title

    Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers

    Volume

    44

    Issue/Number

    1A

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    291

    Last Page

    293

    WOS Identifier

    WOS:000226996600062

    ISSN

    0021-4922

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