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Proceedings Paper

2D optical beam splitter using diffractive optical elements (DOE)
Author(s): Fung J. Wen; Po S. Chung
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Paper Abstract

A novel approach for optical beam distribution into a 2-dimensional (2-D) packaged fiber arrays using 2-D Dammann gratings is investigated. This paper focuses on the design and fabrication of the diffractive optical element (DOE) and investigates the coupling efficiencies of the beamlets into a packaged V-grooved 2x2 fibre array. We report for the first time experimental results of a 2-D optical signal distribution into a packaged 2x2 fibre array using Dammann grating. This grating may be applicable to the FTTH network as it can support sufficient channels with good output uniformity together with low polarization dependent loss (PDL) and acceptable insertion loss. Using an appropriate optimization algorithm (the steepest descent algorithm in this case), the optimum profile for the gratings can be calculated. The gratings are then fabricated on ITO glass using electron-beam lithography. The overall performance of the design shows an output uniformity of around 0.14 dB and an insertion loss of about 12.63 dB, including the DOE, focusing lens and the packaged fiber array.

Paper Details

Date Published: 3 October 2006
PDF: 11 pages
Proc. SPIE 6351, Passive Components and Fiber-based Devices III, 63510U (3 October 2006); doi: 10.1117/12.691058
Show Author Affiliations
Fung J. Wen, City Univ. of Hong Kong (Hong Kong China)
Po S. Chung, City Univ. of Hong Kong (Hong Kong China)


Published in SPIE Proceedings Vol. 6351:
Passive Components and Fiber-based Devices III
Sang Bae Lee; Yan Sun; Kun Qiu; Simon C. Fleming; Ian H. White, Editor(s)

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