LASER ABSORPTOMETER FOR DETECTION OF TRACE SPECIES

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$299,986.00
Award Year:
1993
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
17409
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Science Research Laboratory
15 Ward Street, Somerville, MA, 02143
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr. Allen Flusberg
Principal Research Scientist
(617) 547-1122
Business Contact:
() -
Research Institution:
n/a
Abstract
WITH THE INCREASE IN ATMOSPHERIC POLLUTION AND A NEW, GROWING PUBLIC AWARENESS OF RESULTING ENVIRONMENTAL DAMAGE, THERE IS A NEED FOR NEW TECHNOLOGY TO MEASURE THE CONCENTRATION OF TRACE SPECIES IN THE ATMOSPHERE. EXTRACTIVE METHODS, IN WHICH A SEALED SAMPLE OF AIR IS ANALYZED IN A LABORATORY, ARE EXPENSIVE AND ARE INAPPLICABLETO CONTINUOUS, IN SITU MONITORING OF CONCENTRATIONS. SCIENCE RESEARCH LABORATORY PROPOSES THE DEVELOPMENT OF AN INSTRUMENT CALLED A LASER INTERFEROMETRIC ABSORPTOMETER (LIA) TO FILL THIS NEED. THE BASIS OF THIS INSTRUMENT IS THE INTERFEROMETRIC MEASUREMENT OF THE OPTICAL-PATH CHANGE THAT OCCURS IMMEDIATELY AFTER A PULSED LASER BEAM IS ABSORBED BY TRACE SPECIES PRESENT IN ONE ARM OF THE INTERFEROMETER. THE LIA WILL BE SENSITIVE TO PARTS-PER-TRILLION TRACE-GAS CONCENTRATIONS, 2-3 ORDERS OF MAGNITUDE BETTER THAN INSTRUMENTS BASED ON OTHER APPROACHES TO MONITOR TRACE SPECIES IN THE FIELD.

* information listed above is at the time of submission.

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