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Preliminary Experimental Results of Dual Grating-Assisted Directional Coupler on SOI

Preliminary Experimental Results of Dual Grating-Assisted Directional Coupler on SOI
Preliminary Experimental Results of Dual Grating-Assisted Directional Coupler on SOI
The recent interest in silicon based photonics, and the trend to reduced device dimensions in photonic circuits generally, has led to the need for more converters to couple from optical fibres to such small devices. A range of structures have been proposed and in some cases demonstrated, including three dimensional tapers,inverted tapers and micromachined prims. We have previously reported theoretical analyses of a Dual Grating Assisted Directional Coupler (DGADC), which promises high efficiency coupling over modest spectral linewidths. In this paper we report preliminay experimental results on the fabrication of such devices, together with an evaluation of the coupling efficiency. The approach has been to fabricate a demonstartor device for a particular arrangement of waveguide couping parameters, i.e. we have fabricated a device that couples easily from fibre, because the input waveguide is approximately 5micro m in cross sectional dimensions.The mode converter then couples to a 0.25 micro m silicon waveguide, primarily because comparison exist in the literature.These results are compared with the predicted efficiency, and the results are discussed both in terms of the constituent parts of the DGADC,as well as the fabrication limitations. Whilst our device is not optimised we demonstrate that it has promise for very high efficiency coupling.
Grating coupler, integrated optics, optical waveguides, silicon on insulator
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Reed, Graham T.
ca08dd60-c072-4d7d-b254-75714d570139
Passaro, Vittorio M.N.
787696b6-5fbe-4ec7-9a7f-b76b132ac819
Headley, William R.
233d5522-ec8e-48ce-b6d2-8565d2c9e304
Timotijevic, Branislav
593ef77f-2dfb-4dd1-bc24-c4c3b6b075f3
Atta, Raghied M.H.
d299581a-2238-4793-8cf8-9fe664e9f0ec
Josey, Mike
fd555636-f457-4bd4-88b6-5df31ae273f8
Ensell, Graham
dd522300-e6ad-4f1d-8172-b27dd007770f
Evans, Alan G.R.
493cd0b0-4509-4ad2-9d58-f3533fe47672
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Reed, Graham T.
ca08dd60-c072-4d7d-b254-75714d570139
Passaro, Vittorio M.N.
787696b6-5fbe-4ec7-9a7f-b76b132ac819
Headley, William R.
233d5522-ec8e-48ce-b6d2-8565d2c9e304
Timotijevic, Branislav
593ef77f-2dfb-4dd1-bc24-c4c3b6b075f3
Atta, Raghied M.H.
d299581a-2238-4793-8cf8-9fe664e9f0ec
Josey, Mike
fd555636-f457-4bd4-88b6-5df31ae273f8
Ensell, Graham
dd522300-e6ad-4f1d-8172-b27dd007770f
Evans, Alan G.R.
493cd0b0-4509-4ad2-9d58-f3533fe47672

Mashanovich, Goran Z., Reed, Graham T., Passaro, Vittorio M.N., Headley, William R., Timotijevic, Branislav, Atta, Raghied M.H., Josey, Mike, Ensell, Graham and Evans, Alan G.R. (2005) Preliminary Experimental Results of Dual Grating-Assisted Directional Coupler on SOI. SPIE Photonics West, United States. 22 - 27 Jan 2005.

Record type: Conference or Workshop Item (Paper)

Abstract

The recent interest in silicon based photonics, and the trend to reduced device dimensions in photonic circuits generally, has led to the need for more converters to couple from optical fibres to such small devices. A range of structures have been proposed and in some cases demonstrated, including three dimensional tapers,inverted tapers and micromachined prims. We have previously reported theoretical analyses of a Dual Grating Assisted Directional Coupler (DGADC), which promises high efficiency coupling over modest spectral linewidths. In this paper we report preliminay experimental results on the fabrication of such devices, together with an evaluation of the coupling efficiency. The approach has been to fabricate a demonstartor device for a particular arrangement of waveguide couping parameters, i.e. we have fabricated a device that couples easily from fibre, because the input waveguide is approximately 5micro m in cross sectional dimensions.The mode converter then couples to a 0.25 micro m silicon waveguide, primarily because comparison exist in the literature.These results are compared with the predicted efficiency, and the results are discussed both in terms of the constituent parts of the DGADC,as well as the fabrication limitations. Whilst our device is not optimised we demonstrate that it has promise for very high efficiency coupling.

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More information

Published date: 2005
Venue - Dates: SPIE Photonics West, United States, 2005-01-22 - 2005-01-27
Keywords: Grating coupler, integrated optics, optical waveguides, silicon on insulator
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 260485
URI: https://eprints.soton.ac.uk/id/eprint/260485
PURE UUID: 0dd252ea-afce-4290-814e-81008fa6e41c

Catalogue record

Date deposited: 08 Feb 2005
Last modified: 18 Jul 2017 09:12

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Contributors

Author: Graham T. Reed
Author: Vittorio M.N. Passaro
Author: William R. Headley
Author: Branislav Timotijevic
Author: Raghied M.H. Atta
Author: Mike Josey
Author: Graham Ensell
Author: Alan G.R. Evans

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