Phase locking of a 3.4 THz third-order distributed feedback quantum cascade laser using a room-temperature superlattice harmonic mixer
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Hu_Phase locking.pdf
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Author(s)
Hayton, D. J.
Khudchenko, A.
Pavelyev, D. G.
Hovenier, J. N.
Baryshev, A.
Gao, J. R.
Kao, Tsung-Yu
Hu, Qing
Reno, J. L.
Vaks, V.
Date Issued
2013
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Citation
Hayton, D. J., A. Khudchenko, D. G. Pavelyev, J. N. Hovenier, A. Baryshev, J. R. Gao, T. Y. Kao, Q. Hu, J. L. Reno, and V. Vaks. “Phase Locking of a 3.4 THz Third-Order Distributed Feedback Quantum Cascade Laser Using a Room-Temperature Superlattice Harmonic Mixer.” Appl. Phys. Lett. 103, no. 5 (2013): 051115. © 2013 AIP.
Version
Final published version
Abstract
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 7 MHz 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.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1063/1.4817319
