Abstract

This paper presents a nitrogen dioxide detection device based on gas absorption spectroscopy by connecting two integrating spheres as a gas cell, observing the feasibility of the tandem integrating spheres as a gas cell, and taking a single integrating sphere as a gas cell for comparison experiments. Theoretical knowledge of the effective path length of tandem integrating spheres was established, and the theoretical derivation was further verified by experiments investigating the relationship between absorbance and gas concentration. This work makes it possible to develop a gas sensor that can reduce the volume of the gas cell and keep the effective optical path length unreduced.

© 2023 Optica Publishing Group

Using integrating spheres as absorption cells: path-length distribution and application of Beer's law

Jane Hodgkinson, Dackson Masiyano, and Ralph P. Tatam
Appl. Opt. 48(30) 5748-5758 (2009)

Methane detection using scattering material as the gas cell

Hongze Lin, Fei Gao, Yujian Ding, Chunsheng Yan, and Sailing He
Appl. Opt. 55(28) 8030-8034 (2016)

Sensitive trace gas detection with near-infrared laser diodes and an integrating sphere

Sé bastien Tranchart, Ikhlef Hadj Bachir, and Jean-Luc Destombes
Appl. Opt. 35(36) 7070-7074 (1996)

Ratiometric pathlength calibration of integrating sphere-based absorption cells

S. Bergin, J. Hodgkinson, D. Francis, and R. P. Tatam
Opt. Express 28(13) 19574-19592 (2020)

Extremely sensitive detection of NO₂ employing off-axis integrated cavity output spectroscopy coupled with multiple-line integrated absorption spectroscopy

Gottipaty N. Rao and Andreas Karpf
Appl. Opt. 50(13) 1915-1924 (2011)