Dial Sounder of Methane Insusceptible to Variable Humidity Based on Broadband Laser Diodes

Authors

  • Stoyan Penchev Acad. Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences
  • Vasilka Pencheva Acad. Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences
  • Tanja Dreischuh Acad. Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences

DOI:

https://doi.org/10.7546/CRABS.2023.03.03

Keywords:

greenhouse gases, methane, differential absorption lidar, laser diodes

Abstract

A novel differential absorption lidar method utilizing the spectral and energetic properties of pulsed, high-power, broadband laser diodes for remote sensing of methane is reported. The atmospheric gas content is retrieved using the derived calibration function, integrating multiple resonance lines of the selected CH4/Qyν3 second overtone absorption spectrum matched to a laser mode centred at optimal wavelength. The sensitivity of the lidar is effectively improved by multiplexation of the detected laser radiation in dual spectral channels eliminating the interference of the atmospheric water vapour.

Author Biographies

Stoyan Penchev, Acad. Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: spenchev@ie.bas.bg

Vasilka Pencheva, Acad. Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: vasilka@ie.bas.bg

Tanja Dreischuh, Acad. Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: tanjad@ie.bas.bg

Downloads

Published

27-03-2023

How to Cite

[1]
S. Penchev, V. Pencheva, and T. Dreischuh, “Dial Sounder of Methane Insusceptible to Variable Humidity Based on Broadband Laser Diodes”, C. R. Acad. Bulg. Sci. , vol. 76, no. 3, pp. 352–358, Mar. 2023.

Issue

Section

Physics