Linear Technique for Discrimination of Optically Coded Waveforms Using Optical Frequency Combs

    Authors

    S. P. Bhooplapur; F. J. Quinlan; M. Akbulut;P. J. Delfyett

    Comments

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    Abbreviated Journal Title

    IEEE Photonics Technol. Lett.

    Keywords

    Differential balanced photodetection; matched filtering; optical; frequency comb; semiconductor lasers; SEMICONDUCTOR-LASERS; INJECTION LOCKING; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    We have demonstrated a novel coherent optical detection architecture that serves as a matched filter and successfully discriminates between various encoded optical waveforms with high confidence. The waveforms are produced by encoding the spectral phase of an optical frequency comb with codes from a Walsh-Hadamard set. The encoded optical waveforms are decoded with a coherent detection technique implemented using an optical frequency comb as a set of local oscillators, an interferometer, and a pair of differential balanced photodetectors. The use of only linear optical devices in the receiver results in a higher sensitivity compared to the use of nonlinear optical thresholding and gating techniques. Decoding is demonstrated at power levels of similar to 25 mu W, which are much lower than previously reported. Possible applications of the receiver architecture include laser radar and optical communications in an optical code-division multiple access network.

    Journal Title

    Ieee Photonics Technology Letters

    Volume

    24

    Issue/Number

    19

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    1673

    Last Page

    1676

    WOS Identifier

    WOS:000310744600004

    ISSN

    1041-1135

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