Patent ID: 9369321
Filing Date: 2016-06-14
CPC Classification: G01D,H04B,H04J,H04L

Claim Text:
1. A method comprising: generating first and second sensed signals from first and second sensors, respectively; coupling to the first sensor a first carrier signal having a first frequency and first phase carried on light in a first optical fiber, and coupling to the second sensor a second carrier signal having said first frequency and a second phase carried on light in a second optical fiber; modulating the first and second sensed signals on the first and second carrier signals, respectively, such that information represented by the first and second sensed signals are separately recoverable from the first and second carrier signals based on the first and second phases, respectively, even though the first and second carrier signals have the same frequency; recovery of the first and second sensor information including converting digital time domain samples of the first frequency carrier into a frequency domain having second and third frequency signals each containing components associated with the first and second phases, recovering the first and second sensor information from the second and third frequency signals, wherein only a single frequency domain conversion is required in order to recover information associated with two sensors.