Phase locking of a 3.4 THz third-order distributed feedback quantum cascade laser using a room-temperature superlattice harmonic mixer

被引：38
|
作者：
Hayton, D. J. [1 ]
Khudchencko, A. [1 ]
Pavelyev, D. G. [2 ]
Hovenier, J. N. [3 ]
Baryshev, A. [1 ]
Gao, J. R. [1 ,3 ]
Kao, T. Y. [4 ]
Hu, Q. [4 ]
Reno, J. L. [5 ]
Vaks, V. [6 ]
机构：
[1] Univ Groningen, SRON Netherlands Inst Space Res, NL-9747 AD Groningen, Netherlands
[2] Lobachevskii State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia
[3] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands
[4] MIT, Dept Elect Engn & Comp Sci, Elect Res Lab, Cambridge, MA 02139 USA
[5] Sandia Natl Labs, CINT, Albuquerque, NM 87185 USA
[6] Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 05期
关键词：
FREQUENCY; COMB;
D O I：
10.1063/1.4817319
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the phase locking of a 3.4 THz third-order distributed feedback quantum cascade laser (QCL) using a room temperature GaAs/AlAs superlattice diode as both a frequency multiplier and an internal harmonic mixer. A signal-to-noise level of 60 dB is observed in the intermediate frequency signal between the 18th harmonic of a 190.7 GHz reference source and the 3433 GHz QCL. A phase-lock loop with 7MHz bandwidth results in QCL emission that is 96% locked to the reference source. We characterize the QCL temperature and electrical tuning mechanisms and show that frequency dependence of these mechanisms can prevent phase-locking under certain QCL bias conditions. (C) 2013 AIP Publishing LLC.
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页数：5
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