dc.contributor.author | Ren, Y. | |
dc.contributor.author | Gao, J. R. | |
dc.contributor.author | Hovenier, J. N. | |
dc.contributor.author | Higgins, R. | |
dc.contributor.author | Zhang, W. | |
dc.contributor.author | Bell, A. | |
dc.contributor.author | Klein, B. | |
dc.contributor.author | Klapwijk, T. M. | |
dc.contributor.author | Shi, S. C. | |
dc.contributor.author | Kao, Tsung-Yu | |
dc.contributor.author | Kumar, S. | |
dc.contributor.author | Hu, Qing | |
dc.contributor.author | Reno, J. L. | |
dc.date.accessioned | 2011-02-14T14:47:29Z | |
dc.date.available | 2011-02-14T14:47:29Z | |
dc.date.issued | 2010-07 | |
dc.date.submitted | 2010-06 | |
dc.identifier.issn | 0277-786X | |
dc.identifier.uri | http://hdl.handle.net/1721.1/60935 | |
dc.description.abstract | High-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.iso | en_US | |
dc.publisher | SPIE | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1117/12.857658 | en_US |
dc.rights | Article 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.source | SPIE | en_US |
dc.title | Heterodyne gas cell measurements at 2.9 THz using a quantum cascade laser as local oscillator | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Y. 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 SPIE | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science | en_US |
dc.contributor.approver | Hu, Qing | |
dc.contributor.mitauthor | Kao, Tsung-Yu | |
dc.contributor.mitauthor | Kumar, S. | |
dc.contributor.mitauthor | Hu, Qing | |
dc.relation.journal | Proceedings of SPIE--the International Society for Optical Engineering | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/ConferencePaper | en_US |
dspace.orderedauthors | Ren, 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.orcid | https://orcid.org/0000-0003-1982-4053 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |