Dual-feedback mid-infrared cavity-enhanced absorption spectroscopy for H2CO detection using a radio-frequency electrically-modulated interband cascade laser

Simple item page
dc.citation.firstpage15436
dc.citation.issueNumber12
dc.citation.journalTitleOptics Express
dc.citation.lastpage15444
dc.citation.volumeNumber26
dc.contributor.authorHe, Qixin
dc.contributor.authorZheng, Chuantao
dc.contributor.authorLou, Minhan
dc.contributor.authorYe, Weilin
dc.contributor.authorWang, Yiding
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2018-09-26T14:52:41Z
dc.date.available2018-09-26T14:52:41Z
dc.date.issued2018
dc.description.abstractA mid-infrared cavity-enhanced sensor system was demonstrated for the detection of formaldehyde (H2CO) using a continuous-wave (cw) interband cascade laser (ICL) centered at 3599 nm. A compact Fabry-Perot (F-P) cavity with a physical size of 38 × 52 × 76 mm3 was developed consisting of two concave mirrors with a radius of curvature of 80 mm and a reflectivity of 99.8% at 3.6 μm. Different from the widely reported electro-optical (EO) external modulation based Pound-Drever-Hall (PDH) locking technique, a radio-frequency electrical internal modulation based PDH technique was used for locking the laser mode to the cavity mode. A dual-feedback control on the laser current and on the piezo transducer (PZT) displacement was utilized for further stabilizing mode locking. A 20 m effective optical path length was achieved with a cavity length of 2 cm and a finesse of 1572. The effectiveness and sensitivity of the sensor system were demonstrated by targeting an absorption line at 2778.5 cm−1 for H2CO measurements. A linear relation between the cavity transmitted signal amplitude and the H2CO concentration was obtained within the range of 0−5 ppm. A 1σ detection limit of 25 parts-per-billion (ppb) was achieved with an averaging time of 1 s based on Allan-Werle variance analysis. The reported dual-feedback RF modulation based PDH technique led to a method for gas detection using a similar experimental setup and measurement scheme.
dc.identifier.citationHe, Qixin, Zheng, Chuantao, Lou, Minhan, et al.. "Dual-feedback mid-infrared cavity-enhanced absorption spectroscopy for H2CO detection using a radio-frequency electrically-modulated interband cascade laser." <i>Optics Express,</i> 26, no. 12 (2018) The Optical Society: 15436-15444. https://doi.org/10.1364/OE.26.015436.
dc.identifier.digitaloe-26-12-15436
dc.identifier.doihttps://doi.org/10.1364/OE.26.015436
dc.identifier.urihttps://hdl.handle.net/1911/102711
dc.language.isoeng
dc.publisherThe Optical Society
dc.rightsAuthors and readers may use, reuse, and build upon the article, or use it for text or data mining without asking prior permission from the publisher or the Author(s), as long as the purpose is non-commercial and appropriate attribution is maintained.
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OA
dc.titleDual-feedback mid-infrared cavity-enhanced absorption spectroscopy for H2CO detection using a radio-frequency electrically-modulated interband cascade laser
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
oe-26-12-15436.pdf
Size:
3.26 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
ECE Publications