Nong,, H, Pal, S, Markmann, S et al. (8 more authors) (2014) Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes. Applied Physics Letters, 105. 111113-1 . ISSN 1077-3118
Abstract
A periodically poled lithium niobate (PPLN) crystal with multiple poling periods is used to generate tunable narrow-bandwidth THz pulses for injection seeding a quantum cascade laser (QCL). We demonstrate that longitudinal modes of the quantum cascade laser close to the gain maximum can be selected or suppressed according to the seed spectrum. The QCL emission spectra obtained by electro-optic sampling from the quantum cascade laser, in the most favorable case, shows high selectivity and amplification of the longitudinal modes that overlap the frequency of the narrow-band seed. Proper selection of the narrow-band THz seed from the PPLN crystal discretely tunes the longitudinal mode emission of the quantum cascade laser. Moreover, the THz wave build-up within the laser cavity is studied as a function of the round-trip time. When the seed frequency is outside the maximum of the gain spectrum the laser emission shifts to the preferential longitudinal mode.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Nong,, H, Pal, S, Markmann, S, Hekmat, N, Mohandas, RA, Dean, P, Li, L, Linfield, EH, Davies, AG, Wieck, AD and Jukam, N (2014) Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes. Applied Physics Letters, 105. 111113-1 - 111113-5. and may be found at http://dx.doi.org/10.1063/1.4896032 |
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: | 10 Oct 2014 12:07 |
Last Modified: | 10 Oct 2014 12:17 |
Published Version: | http://dx.doi.org/10.1063/1.4896032 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/1.4896032 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:80803 |