专利名称：Method and apparatus for measuring a
frequency of an optical signal
发明人：Bradley Mells申请号：US10062604申请日：20020131
公开号：US20030142320A1公开日：20030731
专利附图：
摘要：A method and apparatus are provided for detecting a frequency of an opticalsignal within a communications channel having a plurality of optical carriers separated bya predetermined frequency spacing. The method includes the steps of locking an optical
carrier frequency to an axial mode of an optical resonator of known free spectral range;providing an additional optical resonator as a reference having a known free spectralrange that differs from that of the first optical resonator; locking an optical referencesignal to a closest axial mode of a reference optical resonator producing an opticalreference signal that is spectrally offset from said optical carrier frequency by a spectralquantity less than the known free spectral range; mixing the optical carrier frequencywith the reference optical signal frequency thus generating a difference signal as a beatfrequency; and measuring a frequency of a difference signal.
申请人：MELLS BRADLEY
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