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Optical Engineering

Design of a fast tunable wavelength filter based on an arrayed waveguide grating
Author(s): Vadim Dobrusin; Shlomo Ruschin
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Paper Abstract

We present the design of a tunable wavelength filter based on an active arrayed waveguide grating (AWG). We show a novel layout and simulated performance of a tandem filter configuration that covers 43 nm in C band with 0.2-nm (25-GHz) channel spacing at –35-dB crosstalk level. Design of the device is based on Fourier-Fresnel formalism with special emphasis on tuning mechanisms. The Gerchberg-Saxton phase retrieval method is used to estimate phase errors and generate phase patterns required for device tuning. A polarization insensitive filter is presented with its main parameters and simulation results. The technological considerations of achieving nanoseconds-scale tunability by exploiting the electro-optical effect in LiNbO3 crystals are discussed in detail. Such a filter may find various applications in packet-switched coarse and dense multiwavelength dynamic networks.

Paper Details

Date Published: 1 April 2005
PDF: 8 pages
Opt. Eng. 44(4) 044001 doi: 10.1117/1.1886665
Published in: Optical Engineering Volume 44, Issue 4
Show Author Affiliations
Vadim Dobrusin, Tel Aviv Univ. (Israel)
Shlomo Ruschin, Tel-Aviv Univ. (Israel)


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