Ultra-fast and calibration-free temperature sensing in the intrapulse mode
Name:
OpticsLetters_RSMC_EN_AF_article_reviewed.pdf
Size:
868.4Kb
Format:
PDF
Description:
Accepted Manuscript
Type
ArticleKAUST Department
Chemical Kinetics & Laser Sensors LaboratoryClean Combustion Research Center
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2014-11-20Online Publication Date
2014-11-20Print Publication Date
2014-12-01Permanent link to this record
http://hdl.handle.net/10754/347273
Metadata
Show full item recordAbstract
A simultaneously time-resolved and calibration-free sensor has been demonstrated to measure temperature at the nanosecond timescale at repetition rates of 1.0 MHz. The sensor benefits from relying on a single laser, is intuitive and straightforward to implement, and can sweep across spectral ranges in excess of 1 cm-1. The sensor can fully resolve rovibrational features of the CO molecule, native to combustion environments, in the mid-infrared range near X = 4.85 μm at typical combustion temperatures (800-2500 K) and pressures (1-3 atm). All of this is possible through the exploitation of chirp in a quantum cascade laser, operating at a duty cycle of 50%, and by using high bandwidth (500 MHz) photodetection. Here, we showcase uncluttered, spectrally-pure Voigt profile fitting with accompanying peak SNRs of 150, resulting in a typical temperature precision of 0.9% (1u) at an effective time-resolution of 1.0 MHz. Our sensor is applicable to other species, and canbe integrated into commercial technologies.Citation
Ultra-fast and calibration-free temperature sensing in the intrapulse mode 2014, 39 (23):6620 Optics LettersPublisher
The Optical SocietyJournal
Optics LettersAdditional Links
http://www.opticsinfobase.org/abstract.cfm?URI=ol-39-23-6620ae974a485f413a2113503eed53cd6c53
10.1364/OL.39.006620