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    • System and method for detecting underwater objects having a shifted frequency 

      Fry, Edward S.; Kattawar, George W.; Walther, Thomas; Pan, Xioajiang (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2002-05-14)
      A system for detecting an underwater object includes an optical signal generator operable to generate and transmit an optical signal into the water. The system also includes an absorption cell operable to receive the optical ...