Print Email Facebook Twitter Phase locking of a 3.4 THz third-order distributed feedback quantum cascade laser using a room-temperature superlattice harmonic mixer Title Phase locking of a 3.4 THz third-order distributed feedback quantum cascade laser using a room-temperature superlattice harmonic mixer Author Hayton, D.J. Khudchenko, A. Pavelyev, D.G. Hovenier, J.N. Baryshev, A. Gao, J.R. Kao, T.Y. Hu, Q. Reno, J.L. Vaks, V. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2013-08-01 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. Subject aluminium compoundsdistributed feedback lasersgallium arsenideIII-V semiconductorslaser mode lockingquantum cascade laserssuperlattices To reference this document use: http://resolver.tudelft.nl/uuid:54c81b7d-eb9f-4ba3-ad17-bc4b4cd7b21d DOI https://doi.org/10.1063/1.4817319 Publisher American Institute of Physics ISBN 0003-6951 Source https://doi.org/10.1063/1.4817319 Source Applied Physics Letters, 103 (5), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 American Institute of Physics Files PDF Hovenier_2013.pdf 555.11 KB PDF Publisher note, 6-9-2013.pdf 263.62 KB Close viewer /islandora/object/uuid:54c81b7d-eb9f-4ba3-ad17-bc4b4cd7b21d/datastream/OBJ1/view