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dc.contributor.authorRen, Y.
dc.contributor.authorGao, J. R.
dc.contributor.authorHovenier, J. N.
dc.contributor.authorHiggins, R.
dc.contributor.authorZhang, W.
dc.contributor.authorBell, A.
dc.contributor.authorKlein, B.
dc.contributor.authorKlapwijk, T. M.
dc.contributor.authorShi, S. C.
dc.contributor.authorKao, Tsung-Yu
dc.contributor.authorKumar, S.
dc.contributor.authorHu, Qing
dc.contributor.authorReno, J. L.
dc.date.accessioned2011-02-14T14:47:29Z
dc.date.available2011-02-14T14:47:29Z
dc.date.issued2010-07
dc.date.submitted2010-06
dc.identifier.issn0277-786X
dc.identifier.urihttp://hdl.handle.net/1721.1/60935
dc.description.abstractHigh-resolution heterodyne spectrometers operating at above 2 THz are crucial for detecting, e.g., the HD line at 2.7 THz and oxygen OI line at 4.7 THz in astronomy. The potential receiver technology is a combination of a hot electron bolometer (HEB) mixer and a THz quantum cascade laser (QCL) local oscillator (LO).Here we report the first highresolution heterodyne spectroscopy measurement of a gas cell using such a HEB-QCL receiver. The receiver employs a 2.9 THz free-running QCL as local oscillator and a NbN HEB as a mixer. By using methanol (CH3OH) gas as a signal source, we successfully recorded the methanol emission line at 2.92195 THz. Spectral lines at IF frequency at different pressures were measured using a FFTS and well fitted with a Lorentzian profile. Our gas cell measurement is a crucial demonstration of the QCL as LO for practical heterodyne instruments. Together with our other experimental demonstrations, such as using a QCL at 70 K to operate a HEB mixer and the phase locking of a QCL such a receiver is in principle ready for a next step, which is to build a real instrument for any balloon-, air-, and space-borne observatory.en_US
dc.language.isoen_US
dc.publisherSPIEen_US
dc.relation.isversionofhttp://dx.doi.org/10.1117/12.857658en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceSPIEen_US
dc.titleHeterodyne gas cell measurements at 2.9 THz using a quantum cascade laser as local oscillatoren_US
dc.typeArticleen_US
dc.identifier.citationY. Ren, J. R. Gao, J. N. Hovenier, R. Higgins, W. Zhang, A. Bell, B. Klein, T. M. Klapwijk, S. C. Shi, T.-Y. Kao, S. Kumar, Q. Hu and J. L. Reno, "Heterodyne gas cell measurements at 2.9 THz using a quantum cascade laser as local oscillator", Proc. SPIE 7741, 774118 (2010); doi:10.1117/12.857658 © 2010 COPYRIGHT SPIEen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Scienceen_US
dc.contributor.approverHu, Qing
dc.contributor.mitauthorKao, Tsung-Yu
dc.contributor.mitauthorKumar, S.
dc.contributor.mitauthorHu, Qing
dc.relation.journalProceedings of SPIE--the International Society for Optical Engineeringen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/ConferencePaperen_US
dspace.orderedauthorsRen, Y.; Gao, J. R.; Hovenier, J. N.; Higgins, R.; Zhang, W.; Bell, A.; Klein, B.; Klapwijk, T. M.; Shi, S. C.; Kao, T.-Y.; Kumar, S.; Hu, Q.; Reno, J. L.en
dc.identifier.orcidhttps://orcid.org/0000-0003-1982-4053
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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