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Optical Engineering

New structural design of passive optical array waveguide grating-wavelength division multiplexing to upgrade the multiplexing/demultiplexing characteristic
Author(s): Ali Salehi Vanani; Rahim Ghayour
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Paper Abstract

In this paper an 8×1 array waveguide grating-wavelength division multiplexing (AWG-WDM) is optimized for its applications in WDM networks, with the wavelength selective switch as the multiplexer/demultiplexer. With the new method of optimization proposed in this work, a higher bandwidth and lower crosstalk and insertion loss are achieved. The procedure of optimization for finding the best parameters such as the waveguide separation at the output circle, a new structure for Rowland circle, a new structure for the tapered waveguide, and displacement of the foci of the Rowland circle from its standard construction are presented and the results are discussed. We designed a silica-based 8 channel AWG-WDM with the channel spacing of 1.6 nm and the central wavelength of 1550 nm. The occupied area of the phased arrayed waveguides is 2.2 × 1.3 cm2, and the total device size is 3.6 × 1.28 cm2. The 3dB bandwidth of AWG-WDM is 3.31 × 10−4 μm. The insertion loss of the side channels (1 or 8) is about 2.65 dB for this design, where it is about 3.77 dB for the device based on the standard Rowland circle structure.

Paper Details

Date Published: 1 October 2011
PDF: 9 pages
Opt. Eng. 50(10) 105004 doi: 10.1117/1.3638067
Published in: Optical Engineering Volume 50, Issue 10
Show Author Affiliations
Ali Salehi Vanani, Shiraz Univ. (Iran, Islamic Republic of)
Rahim Ghayour, Shiraz Univ. (Iran, Islamic Republic of)

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