Abstract

Combustion control requires visible photodetectors to sense the $\mathrm{CH}*\mathrm{CL}$ emission at $430\mathrm{nm}$ that combined with a visible–blind UV photodetector allows us to obtain the $\mathrm{OH}*∕\mathrm{CH}*$ ratio. UV–visible P-InGaN∕GaN multiple quantum well-N photodiodes with $15–18{\mathrm{mm}}^2$ areas were fabricated to conduct $\mathrm{OH}*\left(308\mathrm{nm}\right)$ and $\mathrm{CH}*\mathrm{CL}$ detection without external filters. Bandpass detectors at $\mathrm{230}\mathrm{–}\mathrm{390}\mathrm{nm}$ and $\mathrm{360}\mathrm{–}\mathrm{450}\mathrm{nm}$ presented linear responses over five decades and rejection ratios $\mathrm{>}{\mathrm{10}}^{\mathrm{3}}$ at 430 and $\mathrm{308}\mathrm{nm}$, respectively. A full optical sensor system was built and detectors operated at $120\mathrm{°C}$ in a combustion chamber, showing linear responses within the dynamic range, maximum signal-to-noise ratios of ${\mathrm{10}}^{\mathrm{3}}$ and response times of $\mathrm{<}\mathrm{1}\mathrm{s}$. An exponential association dependence between the optical $\mathrm{OH}*∕\mathrm{CH}*\mathrm{CL}$ signals and the gas∕air ratios was found.

© 2006 Optical Society of America

Photodiode-based sensor for flame sensing and combustion-process monitoring

Luis Arias, Sergio Torres, Daniel Sbarbaro, and Oscar Farias
Appl. Opt. 47(29) 5541-5549 (2008)

GaN-based solar-ultraviolet detection instrument

Eva Monroy, Fernando Calle, Carlos Angulo, Pablo Vila, Angel Sanz, Jose Antonio Garrido, Enrique Calleja, Elias Muñoz, Soufien Haffouz, Bernard Beaumont, Frank Omnes, and Pierre Gibart
Appl. Opt. 37(22) 5058-5062 (1998)

Quantitative fuel-to-air ratio determination for elevated-pressure methane/air flames using chemiluminescence emission

Walker McCord, Mark Gragston, Yue Wu, Zhili Zhang, Paul Hsu, Keith Rein, Naibo Jiang, Sukesh Roy, and James R. Gord
Appl. Opt. 58(10) C61-C67 (2019)

Visible blind ultraviolet photodetector based on CH₃NH₃PbCl₃ thin film

Wenzhen Wang, Haitao Xu, Jiang Cai, Jiabin Zhu, Chaowei Ni, Feng Hong, Zebo Fang, Fuzong Xu, Siwei Cui, Run Xu, Linjun Wang, Fei Xu, and Jian Huang
Opt. Express 24(8) 8411-8419 (2016)

Gas sensors based on superluminescent diodes for combustion monitoring

Nilesh J. Vasa and Makaram Singaperumal
Appl. Opt. 48(31) G1-G5 (2009)