eprintid: 47315 rev_number: 20 eprint_status: archive userid: 1699 dir: disk0/00/04/73/15 datestamp: 2010-11-29 13:57:52 lastmod: 2025-05-01 17:13:57 status_changed: 2010-11-29 13:57:52 type: article metadata_visibility: show item_issues_count: 0 creators_name: Melloni, A. creators_name: Canciamilla, A. creators_name: Ferrari, C. creators_name: Morichetti, F. creators_name: O'Faolain, L. creators_name: Krauss, T. creators_name: De La Rue, R.M. creators_name: Samarelli, A. creators_name: Sorel, M. creators_orcid: 0000-0001-9544-0647 creators_orcid: 0000-0001-8365-4496 title: Tunable delay lines in silicon photonics: coupled resonators and photonic crystals, a comparison ispublished: pub divisions: 30305000 abstract: In this paper, we report a direct comparison between coupled resonator optical waveguides (CROWs) and photonic crystal waveguides (PhCWs), which have both been exploited as tunable delay lines. The two structures were fabricated on the same silicon-on-insulator (SOI) technological platform, with the same fabrication facilities and evaluated under the same signal bit-rate conditions. We compare the frequency- and time-domain response of the two structures; the physical mechanism underlying the tuning of the delay; the main limits induced by loss, dispersion, and structural disorder; and the impact of CROW and PhCW tunable delay lines on the transmission of data stream intensity and phase modulated up to 100 Gb/s. The main result of this study is that, in the considered domain of applications, CROWs and PhCWs behave much more similarly than one would expect. At data rates around 100 Gb/s, CROWs and PhCWs can be placed in competition. Lower data rates, where longer absolute delays are required and propagation loss becomes a critical issue, are the preferred domain of CROWs fabricated with large ring resonators, while at data rates in the terabit range, PhCWs remain the leading technology. date: 2010-04 date_type: published publisher: Institute of Electrical and Electronics Engineers id_number: 10.1109/JPHOT.2010.2044989 copyright_holders: Copyright © 2010 IEEE prior: First published in IEEE Photonics Journal 2(2):181-194 repro: Reproduced in accordance with the copyright policy of the publisher uniqueid: glaseprints:2010-47315 published_online: 2010-03-22 wos_impact: 53 wos_cluster: WOS:000285056600008 wos_datestamp: 2013-10-25 05:12:58 full_text_status: public publication: IEEE Photonics Journal volume: 2 number: 2 pagerange: 181-194 refereed: TRUE issn: 1943-0655 hoa_compliant: 501 hoa_date_pub: 2010-03-22 hoa_date_fcd: 2015-12-14 hoa_date_foa: 2015-12-14 hoa_version_fcd: VoR hoa_exclude: FALSE hoa_gold: FALSE citation: Melloni, A., Canciamilla, A., Ferrari, C., Morichetti, F., O'Faolain, L., Krauss, T., De La Rue, R.M. , Samarelli, A. and Sorel, M. (2010) Tunable delay lines in silicon photonics: coupled resonators and photonic crystals, a comparison. IEEE Photonics Journal , 2(2), pp. 181-194. (doi: 10.1109/JPHOT.2010.2044989 ) document_url: https://eprints.gla.ac.uk/47315/1/47315.pdf