Kundu, I orcid.org/0000-0002-3564-1903, Bacon, DR orcid.org/0000-0001-8385-0614, Dean, P orcid.org/0000-0002-3950-4359 et al. (4 more authors) (2020) Programmable, Transform-Limited Pulses from a Terahertz Quantum Cascade Laser. ACS Photonics, 7 (9). pp. 2423-2428. ISSN 2330-4022
Abstract
We report programmable control of pulses from a quantum cascade laser. A programmable arbitrary waveform generator is used to control the emission of the lasers by gain-switching. Quantum cascade lasers with both multi-mode and single-mode emission are studied. Laser emission is coherently detected using a phase resolved injection seeding technique based on time domain spectroscopy. For the single mode laser, pulse widths of 500–4000 ps are demonstrated, with time-bandwidth products remaining close to, or below, unity for all pulse widths. Additionally, sequences of two pulses are demonstrated, where the pulse widths, delay, and amplitude of each of the pulses are programmed electronically. A range of pulse parameters are explored. This approach allows for the generation of arbitrary terahertz pulse sequences, which will enable coherent multidimensional spec-troscopy and applications requiring optimized pulse shapes.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2020 American Chemical Society. This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/) |
Keywords: | optical pulses; programmable control; injection seeding; coherent detection |
Dates: |
|
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 EPSRC (Engineering and Physical Sciences Research Council) EP/P021859/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Jul 2020 14:09 |
Last Modified: | 02 Jan 2025 11:29 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acsphotonics.0c00458 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:162967 |