Asymmetric dual-loop feedback to suppress spurious tones and reduce timing jitter in self-mode-locked quantum-dash lasers emitting at 1.55 μm

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dc.contributor.author Asghar, Haroon
dc.contributor.author McInerney, John G.
dc.date.accessioned 2018-07-30T10:30:33Z
dc.date.available 2018-07-30T10:30:33Z
dc.date.issued 2017
dc.identifier.citation Asghar, H. and McInerney, J. G. (2017) 'Asymmetric dual-loop feedback to suppress spurious tones and reduce timing jitter in self-mode-locked quantum-dash lasers emitting at 1.55???m', Optics Letters, 42(18), pp. 3714-3717. doi: 10.1364/OL.42.003714 en
dc.identifier.volume 42
dc.identifier.issued 18
dc.identifier.startpage 3714
dc.identifier.endpage 3717
dc.identifier.issn 0146-9592
dc.identifier.uri http://hdl.handle.net/10468/6528
dc.identifier.doi 10.1364/OL.42.003714
dc.description.abstract We demonstrate an asymmetric dual-loop feedback method to suppress external cavity side-modes induced in self-mode-locked quantum-dash lasers with conventional single-and dual-loop feedback. In this Letter, we report optimal suppression of spurious tones by optimizing the delay in the second loop. We observed that asymmetric dual-loop feedback, with large (similar to 8x) disparity in loop lengths, gives significant suppression in external-cavity side-modes and produces flat radio frequency (RF) spectra close to the main peak with a low timing jitter, compared to single-loop feedback. Significant reduction in RF linewidth and timing jitter was produced by optimizing the delay time in the second feedback loop. Experimental results based on this feedback configuration validate predictions of recently published numerical simulations. This asymmetric dual-loop feedback scheme provides simple, efficient, and cost-effective stabilization of optoelectronic oscillators based on mode-locked lasers. (C) 2017 Optical Society of America en
dc.description.sponsorship Air Force Office of Scientific Research (European Office of Aerospace Research and Development (FA9550-14-1-0204) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Optical Society of America en
dc.relation.uri https://www.osapublishing.org/ol/abstract.cfm?uri=ol-42-18-3714
dc.rights © 2017, Optical Society of America under the terms of the OSA Open Access Publishing Agreement. en
dc.subject Optical feedback en
dc.subject Semiconductor-laser en
dc.subject Stabilization en
dc.subject Injection en
dc.subject Comb en
dc.title Asymmetric dual-loop feedback to suppress spurious tones and reduce timing jitter in self-mode-locked quantum-dash lasers emitting at 1.55 μm en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Haroon Asghar, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email:haroon.asghar@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Air Force Office of Scientific Research
dc.contributor.funder Science Foundation Ireland
dc.description.status Peer reviewed en
dc.identifier.journaltitle Optics Letters en
dc.internal.IRISemailaddress haroon.asghar@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Investigator Programme/12/IP/1658/IE/Pulsed semiconductor lasers for metrology and remote sensing: synchronisation and stabilisation dynamics/


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