Stabilization of self-mode-locked quantum dash lasers by symmetric dual-loop optical feedback

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dc.contributor.author Asghar, Haroon
dc.contributor.author Wei, Wei
dc.contributor.author Kumar, Pramod
dc.contributor.author Sooudi, Ehsan
dc.contributor.author McInerney, John G.
dc.date.accessioned 2018-02-26T15:38:08Z
dc.date.available 2018-02-26T15:38:08Z
dc.date.issued 2018-02-13
dc.identifier.citation Asghar, H., Wei, W., Kumar, P., Sooudi, E. and McInerney, J. G. (2018) 'Stabilization of self-mode-locked quantum dash lasers by symmetric dual-loop optical feedback', Optics Express, 26(4), pp. 4581-4592. doi: 10.1364/OE.26.004581 en
dc.identifier.volume 26 en
dc.identifier.issued 4 en
dc.identifier.startpage 4581 en
dc.identifier.endpage 4592 en
dc.identifier.issn 1094-4087
dc.identifier.uri http://hdl.handle.net/10468/5546
dc.identifier.doi 10.1364/OE.26.004581
dc.description.abstract We report experimental studies of the influence of symmetric dual-loop optical feedback on the RF linewidth and timing jitter of self-mode-locked two-section quantum dash lasers emitting at 1550 nm. Various feedback schemes were investigated and optimum levels determined for narrowest RF linewidth and low timing jitter, for single-loop and symmetric dual-loop feedback. Two symmetric dual-loop configurations, with balanced and unbalanced feedback ratios, were studied. We demonstrate that unbalanced symmetric dual loop feedback, with the inner cavity resonant and fine delay tuning of the outer loop, gives the narrowest RF linewidth and reduced timing jitter over a wide range of delay, unlike single and balanced symmetric dual-loop configurations. This configuration with feedback lengths of 80 and 140 m narrows the RF linewidth by ∼ 4–67x and ∼ 10–100x, respectively, across the widest delay range, compared to free-running. For symmetric dual-loop feedback, the influence of different power split ratios through the feedback loops was determined. Our results show that symmetric dual-loop feedback is markedly more effective than single-loop feedback in reducing RF linewidth and timing jitter, and is much less sensitive to delay phase, making this technique ideal for applications where robustness and alignment tolerance are essential. en
dc.description.sponsorship International Science and Technology Center (European Office of Aerospace Research and Development (grant 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 http://www.opticsexpress.org/abstract.cfm?URI=oe-26-4-4581
dc.rights © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. en
dc.subject Mode-locked lasers en
dc.subject Fluctuations, relaxations, and noise en
dc.subject Laser stabilization en
dc.title Stabilization of self-mode-locked quantum dash lasers by symmetric dual-loop optical feedback en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother John McInerney, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: j.mcinerney@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-02-26T15:24:02Z
dc.description.version Published Version en
dc.internal.rssid 427500627
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder International Science and Technology Center en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Optics Express en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress J.McInerney@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/ en


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