Optical sensing system and method

摘要

An optical sensing system includes a transmitter assembly for generating a generated signal having a frequency in an optical wavelength. An optical sensing fiber is coupled to the transmitter assembly for receiving the generated signal and producing a reflected signal from backscattering of the generated signal. The system also includes a receiver assembly coupled to the optical sensing fiber for receiving the reflected signal. The system further includes a controller in communication with the receiver assembly for determining environmental effects imposed on the optical sensing fiber based on characteristics of the reflected signal.

主权项

1. An optical sensing system comprising:
a transmitter assembly configured to generate a generated signal having a frequency in an optical wavelength and to transmit the generated signal to an optical sensing fiber; a Raman pump laser configured to generate a Raman signal in an optical wavelength; a wave length division multiplexer disposed between said transmitter assembly and the optical sensing fiber and in optical communication with said Raman pump laser and said transmitter assembly, said wave length division multiplexer configured to allow the Raman signal to co-propagate with the generated signal through the optical sensing fiber; a receiver assembly coupled to the optical sensing fiber, the receiver assembly configured to receive a reflected signal produced by backscattering of the generated signal; and a controller in communication with said receiver assembly, the controller configured to determine environmental effects imposed on the optical sensing fiber based on characteristics of the reflected signal.