Optimization of the optical path of the methane telemetry system based on TDLAS technology

Chunlei Xiao; Shuyang Hu

doi:10.1117/12.2550068

12 March 2020 Optimization of the optical path of the methane telemetry system based on TDLAS technology

Chunlei Xiao, Shuyang Hu

Proceedings Volume 11434, 2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 114341B (2020) https://doi.org/10.1117/12.2550068
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

Spectroscopic measurement of methane gas concentrations using absorption lines in the near infra-red (the 1.67 μm region) has been demonstrated by several research teams. In this paper, a methane telemetry system based on tunable diode laser absorption spectroscopy (TDLAS) is proposed and demonstrated. The center wavelength of the laser is locked to the methane absorption peak and the second harmonic detection technology is used to realize the real time monitoring of the methane gas concentration. To receive more signal light and enhance the signal to noise ratio, a lens and its focal length, the spot size of the reflecting surface and a filter plate are used to optimizing the optical path. The experimental results show that after optimizing methane telemetry system the minimum detection limit can be enhance from 20000 ppm to 5000 ppm in the distance of 20 meters.

Citation Download Citation

Chunlei Xiao and Shuyang Hu "Optimization of the optical path of the methane telemetry system based on TDLAS technology", Proc. SPIE 11434, 2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 114341B (12 March 2020); https://doi.org/10.1117/12.2550068

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available