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. In, Photonics Global Conference , Singapore, SG, 14 - 16 Dec 2010.
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 silicaon-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)|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||Faculty of Physical and Applied Science > Optoelectronics Research Centre
|Date Deposited:||07 Jun 2012 12:21|
|Last Modified:||08 Jun 2012 13:57|
|Contributors:||Ambran, S. (Author)
Holmes, C. (Author)
Gates, J.C. (Author)
Webb, A.S. (Author)
Smith, P.G.R. (Author)
Sahu, J.K. (Author)
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