Stabilized HEB-QCL heterodyne spectrometer at super-terahertz
We report a new experiment on a high-resolution heterodyne spectrometer using a 3.5 THz quantum cascade laser (QCL) as local oscillator (LO) and a superconducting hot electron bolometer (HEB) as mixer by stabilizing both frequency and amplitude of the QCL. The frequency locking of the QCL is demonst...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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SPIE
2014
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| Online Access: | http://hdl.handle.net/1721.1/86384 |
| _version_ | 1811077635944480768 |
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| author | Ren, Y. Hayton, D. J. Hovenier, J. N. Cui, M. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, Tsung-Yu Hu, Q. Reno, J. L. |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Ren, Y. Hayton, D. J. Hovenier, J. N. Cui, M. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, Tsung-Yu Hu, Q. Reno, J. L. |
| author_sort | Ren, Y. |
| collection | MIT |
| description | We report a new experiment on a high-resolution heterodyne spectrometer using a 3.5 THz quantum cascade laser (QCL) as local oscillator (LO) and a superconducting hot electron bolometer (HEB) as mixer by stabilizing both frequency and amplitude of the QCL. The frequency locking of the QCL is demonstrated by using a methanol molecular absorption line, a proportional-integral-derivative (PID) controller, and a direct power detector. We show that the LO locked linewidth can be as narrow as 35 KHz. The LO power to the HEB is also stabilized by means of swing-arm actuator placed in the beam path in combination of a second PID controller.© (2012) SPIE. |
| first_indexed | 2024-09-23T10:46:10Z |
| format | Article |
| id | mit-1721.1/86384 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:46:10Z |
| publishDate | 2014 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/863842022-09-27T14:50:17Z Stabilized HEB-QCL heterodyne spectrometer at super-terahertz Ren, Y. Hayton, D. J. Hovenier, J. N. Cui, M. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, Tsung-Yu Hu, Q. Reno, J. L. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Research Laboratory of Electronics Kao, Tsung-Yu We report a new experiment on a high-resolution heterodyne spectrometer using a 3.5 THz quantum cascade laser (QCL) as local oscillator (LO) and a superconducting hot electron bolometer (HEB) as mixer by stabilizing both frequency and amplitude of the QCL. The frequency locking of the QCL is demonstrated by using a methanol molecular absorption line, a proportional-integral-derivative (PID) controller, and a direct power detector. We show that the LO locked linewidth can be as narrow as 35 KHz. The LO power to the HEB is also stabilized by means of swing-arm actuator placed in the beam path in combination of a second PID controller.© (2012) SPIE. 2014-05-02T18:28:05Z 2014-05-02T18:28:05Z 2012-09 Article http://purl.org/eprint/type/ConferencePaper http://hdl.handle.net/1721.1/86384 Ren, Y., D. J. Hayton, J. N. Hovenier, M. Cui, J. R. Gao, T. M. Klapwijk, S. C. Shi, T.-Y. Kao, Q. Hu, and J. L. Reno. “Stabilized HEB-QCL Heterodyne Spectrometer at Super-Terahertz.” Edited by Wayne S. Holland. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI (September 24, 2012). (Proc. SPIE 8452). en_US http://dx.doi.org/10.1117/12.925651 Proceedings of SPIE--the International Society for Optical Engineering 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. application/pdf SPIE SPIE |
| spellingShingle | Ren, Y. Hayton, D. J. Hovenier, J. N. Cui, M. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, Tsung-Yu Hu, Q. Reno, J. L. Stabilized HEB-QCL heterodyne spectrometer at super-terahertz |
| title | Stabilized HEB-QCL heterodyne spectrometer at super-terahertz |
| title_full | Stabilized HEB-QCL heterodyne spectrometer at super-terahertz |
| title_fullStr | Stabilized HEB-QCL heterodyne spectrometer at super-terahertz |
| title_full_unstemmed | Stabilized HEB-QCL heterodyne spectrometer at super-terahertz |
| title_short | Stabilized HEB-QCL heterodyne spectrometer at super-terahertz |
| title_sort | stabilized heb qcl heterodyne spectrometer at super terahertz |
| url | http://hdl.handle.net/1721.1/86384 |
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