US 8,269,971 B1 · System and method for simultaneous detection of a gas using a mode-locked based transmitter

Abstract

A remote sensing system includes a transmitter for generating multiple beams of light; a combiner for combining the multiple beams of light and directing the combined multiple beams toward a target of multiple gases; and a receiver for receiving the combined multiple beams of light from the target. The first and second transmitted beams of light include, respectively, first and second sets of multiple distinct wavelengths that are simultaneously transmitted toward the target. The receiver receives the multiple distinct wavelengths, and simultaneously detects an intensity of each received wavelength. The first set of multiple distinct wavelengths is selected based on absorption characteristics of a first species of gas, and the second set of multiple distinct wavelengths is selected based on absorption characteristics of a second species of gas. The transmitter includes first and second mode-locked based lasers for generating, respectively, the first and second sets of distinct multiple wavelengths. The receiver includes first and second pixel arrays for detecting, respectively, the first and second sets of distinct multiple wavelengths.

Claims19

Dependent claims

A remote sensing system comprising:

a transmitter for transmitting a single beam of light toward a target, and
a receiver for receiving the single beam of light from the target,
wherein the transmitted single beam of light includes multiple distinct wavelengths that are simultaneously transmitted toward the target, and
the receiver is configured to simultaneously receive the multiple distinct wavelengths, and detect an intensity of each received wavelength;
the system further including:
a photodiode, connected in parallel with the receiver, for detecting intensity levels of the received single beam of light,
an integrator for integrating the detected intensity levels, and
a saturation prevention module for resetting the receiver upon reaching an intensity level by the integrator,
wherein the saturation prevention module is configured to prevent saturation of the intensity levels of the multiple distinct wavelengths detected by the receiver.

6 more elements

A remote sensing system comprising:

a transmitter for generating multiple beams of light,
a combiner for combining the multiple beams of light and directing the combined multiple beams toward a target, and
a receiver for receiving the combined multiple beams of light from the target,
wherein a first transmitted beam of light includes a first set of multiple distinct wavelengths that are simultaneously transmitted toward the target,
a second transmitted beam of light includes a second set of multiple distinct wavelengths that are simultaneously transmitted toward the target, and
the receiver is configured to simultaneously receive the multiple distinct wavelengths, and detect an intensity of each received wavelength.

3 more elements

Dependencies are inferred from the claim text.

System and method for simultaneous detection of a gas using a mode-locked based transmitter

Life of this patent

System and method for simultaneous detection of a gas using a mode-locked based transmitter

Life of this patent

Abstract

Claims19