Chu, W, Li, Y, Yang, N et al. (5 more authors) (2019) Dynamics of Optically Mutual-injected Terahertz Quantum Cascade Lasers. In: Proceedings of the 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019), 01-06 Sep 2019, Paris, France. IEEE ISBN 978-1-5386-8285-2
Abstract
Based on the rate equation model, we study the phase locking and self-mixing properties of optically mutual-injected terahertz quantum cascade lasers. Within the phase-locked range, the laser array works steadily at the same frequency, and the electric field amplitudes are stable. Out of the phase-locked range, the instantaneous frequencies and electric field amplitudes oscillate with time. The spontaneous emission noise of mutual-injected QCLs is higher than that of free-running lasers with the same parameters. Mutual-injected QCLs for self-mixing velocity measurement are also analyzed and simulated. When the array works in the phase-locked range, simulation with a moving target shows that self-mixing signals can be observed from each laser. These results are helpful for further understanding the nonlinear dynamic behaviors of THz QCLs under optical injection and provide theoretical support for the development of self-mixing measurement techniques using QCL arrays.
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. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Quantum cascade lasers; Semiconductor laser arrays; Optical feedback; Optical interferometry; Laser noise; Measurement by laser beam; Optical sensors |
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: | 25 Mar 2020 13:56 |
Last Modified: | 25 Mar 2020 13:56 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/irmmw-thz.2019.8874278 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:158700 |