Abstract
A technique is proposed to realize simultaneous measurement of water vapor concentration and total gas pressure. The technique is based on distributed feedback laser diode wavelength scanning, and it is in conjunction with Levenberg-Marquardt algorithm (LMA). Water vapor concentration at a pressure of 5.7 atm has been measured with a differential value between the peak value and the base line, which is derived from the fitting absorption spectrum after LMA processing; and measuring accuracy has been achieved. Simultaneously, gas pressure inside the gas cell can be obtained by calculating full width at half maximum after application of this fitting algorithm, and an accuracy better than 5% has been achieved in a range of 1.02-7.48 atm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
