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Enhanced all-optical modulation in a graphene-coated fibre with low insertion loss

Enhanced all-optical modulation in a graphene-coated fibre with low insertion loss
Enhanced all-optical modulation in a graphene-coated fibre with low insertion loss
Graphene is a highly versatile two-dimensional material platform that offers exceptional optical and electrical properties. Of these, its dynamic conductivity and low effective carrier mass are of particular interest for optoelectronic applications as they underpin the material’s broadband nonlinear optical absorption and ultra-fast carrier mobility, respectively. In this paper, we utilize these phenomena to demonstrate a high-speed, in-fibre optical modulator developed on a side-polished optical fibre platform. An especially low insertion loss (<1 dB) was achieved by polishing the fibre to a near atomically smooth surface (<1 nm RMS), which minimized scattering and ensured excellent contact between the graphene film and the fibre. In order to enhance the light-matter interaction, the graphene film is coated with a high index polyvinyl butyral layer, which has the added advantage of acting as a barrier to the surrounding environment. Using this innovative approach, we have fabricated a robust and stable all-fibre device with an extinction ratio as high as 9 dB and operation bandwidth of 0.5 THz. These results represent a key step towards the integration of low-dimensional materials within standard telecoms networks.
1-17
Zhang, Haojie
9c978833-adbb-4880-b4a2-40854ba96285
Healy, Noel
26eec85c-8d12-4f21-a67a-022f8dc2daab
Shen, Li
f45b1185-ca40-4af3-8b79-d444dc11dc8f
Huang, Chung-Che
825f7447-6d02-48f6-b95a-fa33da71f106
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Peacock, Anna
685d924c-ef6b-401b-a0bd-acf1f8e758fc
Zhang, Haojie
9c978833-adbb-4880-b4a2-40854ba96285
Healy, Noel
26eec85c-8d12-4f21-a67a-022f8dc2daab
Shen, Li
f45b1185-ca40-4af3-8b79-d444dc11dc8f
Huang, Chung-Che
825f7447-6d02-48f6-b95a-fa33da71f106
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Peacock, Anna
685d924c-ef6b-401b-a0bd-acf1f8e758fc

Zhang, Haojie, Healy, Noel, Shen, Li, Huang, Chung-Che, Hewak, Daniel and Peacock, Anna (2016) Enhanced all-optical modulation in a graphene-coated fibre with low insertion loss. Scientific Reports, 6, 1-17, [23512]. (doi:10.1038/srep23512).

Record type: Article

Abstract

Graphene is a highly versatile two-dimensional material platform that offers exceptional optical and electrical properties. Of these, its dynamic conductivity and low effective carrier mass are of particular interest for optoelectronic applications as they underpin the material’s broadband nonlinear optical absorption and ultra-fast carrier mobility, respectively. In this paper, we utilize these phenomena to demonstrate a high-speed, in-fibre optical modulator developed on a side-polished optical fibre platform. An especially low insertion loss (<1 dB) was achieved by polishing the fibre to a near atomically smooth surface (<1 nm RMS), which minimized scattering and ensured excellent contact between the graphene film and the fibre. In order to enhance the light-matter interaction, the graphene film is coated with a high index polyvinyl butyral layer, which has the added advantage of acting as a barrier to the surrounding environment. Using this innovative approach, we have fabricated a robust and stable all-fibre device with an extinction ratio as high as 9 dB and operation bandwidth of 0.5 THz. These results represent a key step towards the integration of low-dimensional materials within standard telecoms networks.

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More information

Accepted/In Press date: 3 March 2016
e-pub ahead of print date: 22 March 2016
Published date: 22 March 2016
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 389351
URI: http://eprints.soton.ac.uk/id/eprint/389351
PURE UUID: 8c768052-de99-4bd7-a571-200c6dd89955
ORCID for Haojie Zhang: ORCID iD orcid.org/0000-0002-4577-3600
ORCID for Chung-Che Huang: ORCID iD orcid.org/0000-0003-3471-2463
ORCID for Daniel Hewak: ORCID iD orcid.org/0000-0002-2093-5773
ORCID for Anna Peacock: ORCID iD orcid.org/0000-0002-1940-7172

Catalogue record

Date deposited: 07 Mar 2016 10:04
Last modified: 18 Feb 2021 17:05

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