Kondawar, S. S. orcid.org/0000-0003-3918-9472, North, N. K. orcid.org/0009-0002-8221-2893, Han, Y. orcid.org/0000-0003-2141-3077 et al. (10 more authors) (2024) Power stabilization of a terahertz-frequency quantum-cascade laser using a photonic integrated modulator. Optics Express, 32 (17). pp. 30017-30026. ISSN 1094-4087
Abstract
We demonstrate a technique to stabilize the emission from a 3.4-THz quantum-cascade laser against power drifts, using a recently developed photonic integrated circuit (PIC) structure formed by coupling a racetrack resonator with a ridge waveguide. This structure enables a dynamic power-control range of ±15% and locking over >600 s using a proportional–integral control loop. The resonator yields a 50% weaker perturbation to the laser emission frequency when compared with direct laser modulation, and hence offers the prospect of simultaneous, quasi-independent control of power and frequency. Progress towards integrating the PIC with a precision micromachined rectangular metallic waveguide module has also been demonstrated, with power modulation of the principal laser emission line being observed during pulsed operation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Journal © 2024. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
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) |
Funding Information: | Funder Grant number UK Space Agency Polaris House Not Known MRC (Medical Research Council) MR/S016929/1. MRC (Medical Research Council) MR/Y011775/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Jul 2024 10:29 |
Last Modified: | 24 Jan 2025 11:15 |
Published Version: | https://opg.optica.org/oe/fulltext.cfm?uri=oe-32-1... |
Status: | Published |
Publisher: | Optica Publishing Group |
Identification Number: | 10.1364/OE.529879 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:215104 |
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