Title: Broadband differential absorption sensor for detecting gaseous species

Abstract

A remote sensor system comprising a laser transmitter that emits a pulse of broadband laser illumination comprising a plurality of wavelengths and a receiver configured to detect laser illumination backscatter. The sensor system further includes a computing system configured to determine a plurality of species number densities along a travel path of the laser illumination. Determining the plurality of species number densities includes determining a first number density of a first species based on a first set of optical transmission values from the backscatter data for a first subset of wavelengths of the plurality of wavelengths and a first attenuation cross-section of the first species. Additional species are determined based on additional sets of optical transmission values from the backscatter data for additional subsets of wavelengths of the plurality of wavelengths and additional cross-sections of additional species.

Inventors:

Smith, Mark W.

Issue Date:

2023-10-10

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

2293700

Patent Number(s):

11781975

Application Number:

17/482,619

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

Show more

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N2021/1795 - {Atmospheric mapping of gases}
G01N2021/3129 - {Determining multicomponents by multiwavelength light}
G01N2021/3513 - {Open path with an instrumental source}
G01N2021/4709 - {Backscatter}
G01N21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {
G01N21/3504 - for analysing gases, e.g. multi-gas analysis
G01N2201/06113 - Coherent sources
G01N2201/0697 - Pulsed lasers

Show less

DOE Contract Number:  

NA0003525

Resource Type:

Patent

Resource Relation:

Patent File Date: 09/23/2021

Country of Publication:

United States

Language:

English