Freeman, JR, Maysonnave, J, Khanna, S et al. (4 more authors) (2013) Laser-seeding dynamics with few-cycle pulses: Maxwell-Bloch finite-difference time-domain simulations of terahertz quantum cascade lasers. Physical Review A - Atomic, Molecular, and Optical Physics, 87 (6). 063817. ISSN 1050-2947
Abstract
We implement a Maxwell-Bloch simulation for a two-level system within the finite-difference time-domain method to simulate the seeding of lasers by broadband pulse injection. The model does not make the slowly varying envelope approximation, and the full electromagnetic field is simulated so that we are able to obtain time-resolved seeding by few-cycle pulses. The model is compared to recent results on seeding of THz quantum cascade lasers to aid in the interpretation of their complex signals. The simulations are found to be in good agreement with the data when gain recovery times of 15 ps are used. Furthermore, we find that the emission from the laser depends only weakly on the seed used to initiate laser action. The model is readily applicable to any seeded laser system where few-cycle seed pulses are used.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | (c) 2013, American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Broadband pulse; few-cycle pulse; finite difference time domain simulations; finite-difference time-domain (FDTD) methods; slowly varying envelope approximation; terahertz quantum-cascade lasers; THz quantum cascade lasers; two-level system |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Apr 2014 11:38 |
Last Modified: | 14 Apr 2017 02:04 |
Published Version: | http://link.aps.org/doi/10.1103/PhysRevA.87.063817 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/PhysRevA.87.063817 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78435 |