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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hubers, H.-W. Pavlov, S.G. Richter, H. Semenov, A.D. Mahler, L. Tredicucci, A. Beere, H.E. Ritchie, D.A. |
| Copyright Year | 2007 |
| Description | Author affiliation: Dept. of Terahertz & Infrared Sensors, German Aerosp. Center, Berlin (Hubers, H.-W.; Pavlov, S.G.; Richter, H.; Semenov, A.D.) |
| Abstract | We have studied the current- and temperature-driven frequency tunability of quantum cascade lasers operating at 2.5 THz. The design of the active medium follows the so-called bound-to-continuum approach. One laser has a Fabry-Perot type resonator. It operates on several modes simultaneously. The other has a distributed feedback structure on top of the active medium which leads to single mode emission. High-resolution spectra of the laser emission by heterodyne mixing with the radiation from a THz gas laser were obtained. In the case of the Fabry-Perot laser, homodyne mixing of its modes was performed too. The emission frequency increases with current for both lasers and all modes. The analysis of the spectra shows up to 2% variation of the difference frequency due to changes of the laser current. The origins of these shifts are discussed. |
| Starting Page | 946 |
| Ending Page | 948 |
| File Size | 713901 |
| Page Count | 3 |
| File Format | |
| ISBN | 9781424414383 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-09-02 |
| Publisher Place | UK |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronic Engineers, Inc. |
| Subject Keyword | Quantum cascade lasers Laser modes Surface emitting lasers Frequency Laser tuning Gas lasers Distributed feedback devices Temperature Waveguide lasers Laser feedback high resolution quantum cascade laser terahertz frequency tuning |
| Content Type | Text |
| Resource Type | Article |
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