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    Ultra-fast and calibration-free temperature sensing in the intrapulse mode

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    Name:
    OpticsLetters_RSMC_EN_AF_article_reviewed.pdf
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    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Chrystie, Robin cc
    Nasir, Ehson Fawad cc
    Farooq, Aamir cc
    KAUST Department
    Chemical Kinetics & Laser Sensors Laboratory
    Clean Combustion Research Center
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2014-11-20
    Online Publication Date
    2014-11-20
    Print Publication Date
    2014-12-01
    Permanent link to this record
    http://hdl.handle.net/10754/347273
    
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    Abstract
    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 Letters
    Publisher
    The Optical Society
    Journal
    Optics Letters
    DOI
    10.1364/OL.39.006620
    Additional Links
    http://www.opticsinfobase.org/abstract.cfm?URI=ol-39-23-6620
    ae974a485f413a2113503eed53cd6c53
    10.1364/OL.39.006620
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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