Mohandas, RA, Ponnampalam, L, Seeds, A et al. (4 more authors) (2019) High-resolution frequency and phase control of a terahertz laser. In: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 44th International Conference on Infrared, Millimeter, and Terahertz Waves, 01-06 Sep 2019, Paris, France. IEEE ISBN 9781538682852
Abstract
We report on the high-resolution frequency and phase control of a terahertz (THz) quantum cascade laser (QCL). The 2.0 THz QCL is locked to a stable microwave reference frequency via an all-fibre infrared frequency comb. The frequency of the QCL is controlled by optical injection and the phase is independently controlled by introducing a phase-lock loop that provides electronic feedback to the QCL, forming an optical injection phase locked loop (OIPLL). By implementing this, (1) the instrument limited linewidth of the locked QCL was $ {< }1$ Hz (2) for a fixed frequency, the phase of the THz QCL relative to the microwave reference frequency can be controlled within a range 0.3 π.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Keywords: | Quantum cascade lasers; Optical fibers; Phase locked loops; Oils; Frequency control; Microwave oscillators |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Nov 2019 12:07 |
Last Modified: | 26 Nov 2019 19:38 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/IRMMW-THz.2019.8873906 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:153849 |