Abstract:
A fiber carbon monoxide gas sensor was reported in this paper. Due to CO has a much weaker absorption in near infrared region, the harmonic detection technique is combine...Show MoreMetadata
Abstract:
A fiber carbon monoxide gas sensor was reported in this paper. Due to CO has a much weaker absorption in near infrared region, the harmonic detection technique is combined with cavity enhanced absorption spectroscopy (CEAS). The basic principle of harmonic detection technique and cavity enhanced absorption spectroscopy are expatiated at first. We designed the experiment scheme and analyzed the key problem in the experiment. The second harmonic signals were extracted at different CO concentration and we fit the amplitude of the second harmonic and corresponding CO concentration. The experiment results indicated that the amplitude of second harmonic and CO concentration have a good linearity relationship. A sensitivity of about 10 ppm has been achieved with this measurement.
Published in: 2009 Symposium on Photonics and Optoelectronics
Date of Conference: 14-16 August 2009
Date Added to IEEE Xplore: 01 September 2009
Print ISBN:978-1-4244-4412-0
ISSN Information:
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Carbon Monoxide ,
- Gas Sensors ,
- Harmonic Detection ,
- Cavity-enhanced Absorption Spectroscopy ,
- CO Concentration ,
- Weak Absorption ,
- Harmonic Signal ,
- Infrared Region ,
- Experimental Problems ,
- Carbon Dioxide ,
- Low-pass ,
- Absorption Coefficient ,
- Signal Amplitude ,
- Gas Concentration ,
- Mirror Image ,
- Reference Signal ,
- Central Wavelength ,
- Lock-in Amplifier ,
- Function Generator ,
- Gas Cell ,
- Optical Cavity ,
- Carbon Monoxide Molecules ,
- Attenuation Length ,
- Infrared Absorption ,
- Increase Detection Sensitivity ,
- Cell Distance
Contents Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Carbon Monoxide ,
- Gas Sensors ,
- Harmonic Detection ,
- Cavity-enhanced Absorption Spectroscopy ,
- CO Concentration ,
- Weak Absorption ,
- Harmonic Signal ,
- Infrared Region ,
- Experimental Problems ,
- Carbon Dioxide ,
- Low-pass ,
- Absorption Coefficient ,
- Signal Amplitude ,
- Gas Concentration ,
- Mirror Image ,
- Reference Signal ,
- Central Wavelength ,
- Lock-in Amplifier ,
- Function Generator ,
- Gas Cell ,
- Optical Cavity ,
- Carbon Monoxide Molecules ,
- Attenuation Length ,
- Infrared Absorption ,
- Increase Detection Sensitivity ,
- Cell Distance
