Patent ID: 8606117
Filing Date: 2013-12-10
Classification: G01M,H04B

Abstract:
1. An optical transmission system, comprising: a sequence generator configured to generate a digital data sequence; an amplitude modulation element configured to receive a digital data signal comprising payload data, the amplitude modulation element configured to amplitude modulate the digital data signal with the digital data sequence thereby providing an amplitude modulated signal; an optical transmitter coupled to an optical fiber, the optical transmitter configured to convert the amplitude modulated signal to an optical signal and to transmit the optical signal across the optical fiber; a sequence recovery element configured to receive reflections of the optical signal from the optical fiber and to convert the reflections to digital samples; and a plurality of correlators configured to correlate the digital samples with the digital data sequence thereby providing a plurality of correlation values, wherein each of the correlators corresponds to a respective location along the optical fiber, and wherein each of the correlators is configured to correlate one of the digital samples with a respective value of the digital data sequence thereby providing a correlation value indicating whether an anomaly exists at the corresponding location along the optical fiber.