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Advances in OptoElectronics
Volume 2016 (2016), Article ID 5606417, 9 pages
http://dx.doi.org/10.1155/2016/5606417
Research Article

Study of a Linear Acoustooptic Laser Modulator Based on All-Fibre Sagnac Interferometer

1Facultad de Ciencias Físico Matemáticas, Posgrado en Física Aplicada, Benemérita Universidad Autónoma de Puebla, Boulevard 18 Sur y Avenida San Claudio, San Manuel, 72570 Puebla, PUE, Mexico
2Facultad de Ciencias de la Electrónica, Benemérita Universidad Autónoma de Puebla, Boulevard 18 Sur y Avenida San Claudio, San Manuel, 72570 Puebla, PUE, Mexico

Received 9 February 2016; Revised 11 May 2016; Accepted 24 May 2016

Academic Editor: Somenath N. Sarkar

Copyright © 2016 G. Trinidad García et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The feasibility of polarization-maintaining photonic crystal fibre (PM-PCF) strategy for acoustooptic modulation using all-fibre Sagnac interferometer is demonstrated. The principal constraint to apply the strategy is defined by a linear laser acoustooptic modulator (AOM) for 1550 nm. The intensity of incident acoustic waves over the PM-PCF loop segment affected the signal interference transmission; here, modulation by birefringence variation around was observed. It is discovered that, through mathematical analysis, two operation points in the spectrum, , operate in a linear region, and expressions for spectral gain and sensibility are also discovered. AOM has a bandwidth from 0.1 Hz to 20 kHz, and its dynamic range is from 0.0 to 43.5 dB.