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).

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Description/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.

Item Type: Conference or Workshop Item (Paper)
Digital Object Identifier (DOI): doi:10.1109/PGC.2010.5705970
Venue - Dates: Photonics Global Conference, Singapore, 2010-12-14 - 2010-12-16
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Organisations: Optoelectronics Research Centre
ePrint ID: 340029
Date :
Date Event
December 2010e-pub ahead of print
December 2010Published
Date Deposited: 07 Jun 2012 12:21
Last Modified: 17 Apr 2017 17:01
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/340029

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