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Optical leaky integrator with inverted and noninverted accumulation

✍ Scribed by Pablo A. Costanzo-Caso; Azad Siahmakoun; Sergio Granieri

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
326 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This paper describes a novel optical leaky integrator for an all‐optical Σ−Δ modulator. The device is designed and built in a non‐interferometric structure, which consists of a nonlinear fiber loop and a wavelength converter. The system is characterized for square input signals in MHz range. The integration time‐constant of the integrator can be easily adjusted over the full interval of the input period by modifying the semiconductor optical amplifier driving current. Experimental results are in excellent agreement with numerical simulations and are used to obtain Σ−Δ modulator design parameters. The operating frequency can be increased without difficulty up to GHz range simply by reducing the loop length. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26222

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