Accession Number : ADA299343

Title :   Medical Gas Diagnosis Via Diode Laser Absorption Spectroscopy.

Descriptive Note : Midterm rept.,

Corporate Author : PRINCETON ELECTRONIC SYSTEMS INC CRANBURY NJ

Personal Author(s) : Sun, Steve ; Ghosh, Chuni

PDF Url : ADA299343

Report Date : 21 APR 1995

Pagination or Media Count : 19

Abstract : Development of a monitor to measure O2 and CO2 content in the expired air is the objective of this program. We use diode laser based combined wavelength and frequency modulation spectroscopy for detection of the O2 and CO2 in the expired air. A prototype for measuring O2 content was fabricated in November 1994. The prototype provides the necessary signal-to-noise ratio. The acquisition time constant was too long for accurate breath-by-breath oxygen content analysis. The long term system and laser stability have to be improved as well. In the current stage, a second prototype targeted on these issues is being fabricated.

Descriptors :   *SPECTROSCOPY, *SEMICONDUCTOR DIODES, *LASERS, *DIAGNOSIS(MEDICINE), STABILITY, ACQUISITION, FREQUENCY MODULATION, SIGNAL TO NOISE RATIO, PROTOTYPES, SEMICONDUCTOR LASERS, GASES, ABSORPTION.

Subject Categories : Medicine and Medical Research
      Electrical and Electronic Equipment
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE