OPTICAL METHOD AND SYSTEM FOR MEASURING AN ENVIRONMENTAL PARAMETER

摘要

An optical system for sensing an environmental parameter, comprising: an optical pulse generator for generating an excitation pulse; a pulse splitter for splitting the excitation pulse into a sensing pulse and a reference pulse; a sensing arm for receiving the sensing pulse, the sensing arm comprising an emission sensor for sensing the environmental parameter, the optical emission sensor generating a first measurement pulse having a measurement wavelength; a reference arm for receiving the reference pulse, the reference arm comprising an emission artefact adapted to convert the reference pulse into a second measurement pulse having the measurement wavelength; a time delay line for delaying a relative propagation of the measurement pulses; a light detector for measuring an optical energy of the first and second measurement pulses; and an 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 of a sample, comprising:
an optical pulse generator for generating an excitation pulse having an excitation wavelength; a pulse splitter for splitting the excitation pulse into a sensing pulse and a reference pulse; a sensing arm connected to the pulse splitter for receiving the sensing pulse therefrom, the sensing arm comprising an optical emission sensor for sensing the environmental parameter of the sample, the optical emission sensor generating at least one first measurement pulse, each first measurement pulse having a respective measurement wavelength different from the excitation wavelength; a reference arm connected to the pulse splitter for receiving the reference pulse therefrom, the reference arm comprising an emission artefact adapted to convert the reference pulse into at least one second measurement pulse each having the respective measurement wavelength; 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 at least one first measurement pulse and the at least one second measurement pulse relative to a propagation of another one of the at least one first measurement pulse and the at least one second measurement pulse; a light detector for detecting the at least one first measurement pulse and the at least one second measurement pulse and measuring an optical energy of the at least one first measurement pulse and the at least one second measurement pulse; 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.