OPTICAL METHOD AND SYSTEM FOR MEASURING AN ENVIRONMENTAL PARAMETER

摘要

An optical system for sensing an environmental parameter, comprising: a pulse generator for generating a first pulse having a first wavelength and a second pulse having a second wavelength; a pulse splitter for splitting each one of the first and second pulse into a sensing pulse and a reference pulse; a sensing arm for receiving the sensing pulses therefrom and comprising a spectro-ratiometric sensor; a reference arm for receiving the reference pulses; a time delay line for delaying a relative propagation of the sensing pulses and the reference pulses; a light detector for measuring an optical energy of the sensing pulse and the reference pulse, for the first and second wavelengths; and at least one optical link for optically connecting the pulse generator to the pulse splitter, and the sensing and reference arms to the light detector.

主权项

1. An optical system for sensing an environmental parameter, comprising:
an optical pulse generator for generating a first pulse having a first wavelength and a second pulse having a second and different wavelength; a pulse splitter for splitting each one of the first and second pulse into a sensing pulse and a reference pulse; a sensing arm connected to the pulse splitter for receiving the sensing pulses therefrom, the sensing arm comprising a spectro-ratiometric sensor for sensing the environmental parameter; a reference arm connected to the pulse splitter for receiving the reference pulses therefrom; a time delay line contained in one of the sensing arm and the reference arm, the time delay line for delaying a propagation of one of the sensing pulses and the reference pulses relative to a propagation of another one of the sensing pulses and the reference pulses; a light detector for detecting the sensing pulse and the reference pulse and measuring an optical energy of the sensing pulse and the reference pulse, for the first and second wavelengths; and at least one optical link for optically connecting the pulse generator to the pulse splitter, and the sensing and reference arms to the light detector.