Subgigahertz channel filtering by optical heterodyne detection using a single axial mode from an injection-locked passively mode-locked semiconductor laser

    Authors

    W. Lee; M. Mielke; S. Etemad;P. J. Delfyett

    Comments

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    Abbreviated Journal Title

    IEEE Photonics Technol. Lett.

    Keywords

    dense wavelength-division multiplexing (DWDM); heterodyne detection; mode-locked semiconductor lasers; optical injection locking; SYSTEMS; RECEIVER; NOISE; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    We report experimental results of fine (subgigahertz) channel filtering via optical heterodyne detection based on an optical injection locking technique. A passively mode-locked semiconductor laser injection locked to a master oscillator forms a comb of discrete frequency probes, and a single axial mode is used as a local oscillator (LO). The injection-locked LO carrier showed 42-dB phase noise suppression at 100-kHz offset. One of two analog radio frequency signals detuned by only 200 MHz showed a signal-to-noise ratio over 65 dB/Hz through demultiplexing with a commercially available microwave bandpass filter. The single sideband noise of the heterodyne beat tone at 13.160 GHz was measured to be -123 dBc/Hz; at 100 kHz offset from the carrier under injection-locked state.

    Journal Title

    Ieee Photonics Technology Letters

    Volume

    16

    Issue/Number

    8

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    1945

    Last Page

    1947

    WOS Identifier

    WOS:000222884300051

    ISSN

    1041-1135

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