Print Email Facebook Twitter Frequency Locking and Monitoring Based on Bi-directional Terahertz Radiation of a 3rd-Order Distributed Feedback Quantum Cascade Laser Title Frequency Locking and Monitoring Based on Bi-directional Terahertz Radiation of a 3rd-Order Distributed Feedback Quantum Cascade Laser Author Van Marrewijk, N. Mirzaei, B. Hayton, D. Gao, J.R. Kao, T.Y. Hu, Q. Reno, J.L. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2015-10-07 Abstract We have performed frequency locking of a dual, forward reverse emitting third-order distributed feedback quantum cascade laser (QCL) at 3.5 THz. By using both directions of THz emission in combination with two gas cells and two power detectors, we can for the first time perform frequency stabilization, while monitor the frequency locking quality independently. We also characterize how the use of a less sensitive pyroelectric detector can influence the quality of frequency locking, illustrating experimentally that the sensitivity of the detectors is crucial. Using both directions of terahertz (THz) radiation has a particular advantage for the application of a QCL as a local oscillator, where radiation from one side can be used for frequency/phase stabilization, leaving the other side to be fully utilized as a local oscillator to pump a mixer. Subject terahertzquantum cascade lasers (QCLs)frequency lockingthird-order distributed feedback To reference this document use: http://resolver.tudelft.nl/uuid:71c488c4-bce6-44d0-a675-56bd74c40a1b Publisher Springer ISSN 1866-6892 Source https://doi.org/10.1007/s10762-015-0210-4 Source Journal of Infrared, Millimeter, and Terahertz Waves, 2015 Part of collection Institutional Repository Document type journal article Rights (c) 2015 The Author(s)This article is published with open access at Springerlink.com Files PDF Mirzaei_2015.pdf 1.67 MB Close viewer /islandora/object/uuid:71c488c4-bce6-44d0-a675-56bd74c40a1b/datastream/OBJ/view