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Micromachined multimode interference device in flat-fiber

Ambran, S., Holmes, C., Gates, J.C., Webb, A.S., Smith, P.G.R. and Sahu, J.K. (2010) Micromachined multimode interference device in flat-fiber At Photonics Global Conference, Singapore. 14 - 16 Dec 2010. (doi:10.1109/PGC.2010.5705970).

Record type: Conference or Workshop Item (Paper)

Abstract

A novel flat-fiber platform is presented for fabricating integrated optical multimode interference (MMI) devices. Fabrication is achieved by modifying a standard optical fiber drawing process and applying a micromachining technique. The fabricated structure consists of an MMI region within the flat-fiber that is defined by micromachined trenches, illustrated in Figure 1(a). A 1x3 splitter has been demonstrated, with a spatial output mode that be tuned by placing refractive index oils within the micromachined trenches.
MMI devices have been demonstrated in different planar platforms such as silicon-on-insulator and silica-on-silicon. However, many of these materials are potentially expensive, high loss or have a complex fabrication process. The desire to have a fiber-like platform, capable of supporting multiple waveguides in a planar format, led us to develop a novel silica optical flat-fiber technology. This allows us to overcome the limitations of existing planar technologies by offering a low cost, low loss substrate with fiber-like flexibility, long lengths and the ability to make integrated devices. The flat-fiber substrate is fabricated using standard silica fiber fabrication but differs by collapsing the preform during the fiber drawing stage by using a vacuum. The trenches of the device were diced using an ultra-precision micromachining technique.

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e-pub ahead of print date: December 2010
Published date: December 2010
Venue - Dates: Photonics Global Conference, Singapore, 2010-12-14 - 2010-12-16
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 340029
URI: http://eprints.soton.ac.uk/id/eprint/340029
PURE UUID: cd2c9c5c-fb1f-4c52-bb53-7e41dce5bc92
ORCID for J.C. Gates: ORCID iD orcid.org/0000-0001-8671-5987

Catalogue record

Date deposited: 07 Jun 2012 12:21
Last modified: 20 Oct 2017 16:35

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Contributors

Author: S. Ambran
Author: C. Holmes
Author: J.C. Gates ORCID iD
Author: A.S. Webb
Author: P.G.R. Smith
Author: J.K. Sahu

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