Patent ID: 7872737
Filing Date: 2011-01-18
Classification: G01M

Abstract:
1. An optical time domain reflectometry system comprising: a code generator configured to be coupled to an optical communication system and to generate a set of predefined non-periodic complementary code sequences, said set of predefined non-periodic complementary code sequences comprising a plurality of first resolution code sequences and a plurality of second resolution code sequences, said first and second resolution code sequences having first and second frequency spectra, respectively, said first frequency spectra having a maximum at a first frequency and said second frequency spectra having a maximum at a second frequency different from said first frequency, said code generator being configured to provide said first resolution code sequences as first resolution test signals for transmission on said optical communication system; and a correlator configured to be coupled to said optical communication system and to receive reflected portions of said first resolution test signals from said optical communication system as reflected first resolution test signals, said correlator configured to provide first resolution system response data from said first resolution code sequences and said reflected first resolution test signals; said code generator being configured to provide said second resolution code sequences as second resolution test signals for transmission on said optical communication system; said correlator being configured to receive reflected portions of said second resolution test signals from said optical communication system as reflected second resolution test signals, said correlator configured to provide second resolution system response data from said second resolution code sequences and said reflected second resolution test signals.