Bandwidth control in a hybrid fiber acousto-optic filter

Abstract

We report a bandwidth variation technique in an acousto-optic filter. Utilizing the adiabatic conversion in both optical and acoustic modes, we obtain a novel hybrid waveguide composed of serial concatenation of single-mode fiber (SMF) and two-mode hollow optical fiber (HOF). On the basis of dissimilarity in the phase-matching conditions and beat-length dispersion in SMF and HOF, the FWHM of the resonant bands is varied from 3.8 to 190 nm near the 1.5-microm region in a single device. Furthermore, we theoretically analyze the acousto-optic coupling among the guided modes in HOF, which shows good agreement with experimental observations.

A new modulation method to generate all-optical logic gates in an AOTF

“…To avoid the presence of the effects of secondorder nonlinear susceptibility [χ (2) ], in this work, we consider a centrosymmetric material (Sobrinho and Sombra 2002;Sobrinho et al 2002;Jung et al 2005;Yariv and Yeh 1984;Xu and Stroud 1992).…”

“…toptica.com/products/terahertz_generation; Wake et al 1996;Fice et al 2012;Islam 2012;Bhatti et al 2000;Lima Júnior et al 2009;Ferreira et al 2012Ferreira et al , 2009Alvarado et al 1993;Novitsky 2013;Sobrinho et al 2002Sobrinho et al , 2008Tamai et al 2009;Huiszoon et al 2009;Onaka et al 2008;Veeriah et al 2007;Katrasnik et al 2010;Gupta et al 2012;Sabóia and Ferreira 2009;Mazzali and Fragnito 1998;Sobrinho and Sombra 2002;Tran 1997;Jung et al 2005;Yariv and Yeh 1984;Xu and Stroud 1992;Xie et al 2013;Sobrinho 2002;Song et al 2014;Mantsevich 2015). Information technology and high, medium or low capacity transmission systems can be potentially improved by the incorporation of all-optical devices.…”

“…The acousto-optic tunable filter (AOTF) has been considered as a strategic optical dispositive for optical communication due your compact size, high-speed switching and wideband wavelength selectivity (Onaka et al 2008;Veeriah et al 2007;Katrasnik et al 2010;Gupta et al 2012;Sabóia and Ferreira 2009;Sobrinho and Sombra 2002;Sobrinho et al 2002;Tran 1997;Jung et al 2005;Yariv and Yeh 1984;Xu and Stroud 1992;Xie et al 2013;Song et al 2014;Mantsevich et al 2015). An all-fiber tunable Mach-Zehnder interferometer based on an AOTF was demonstrated experimentally to have high performance .…”

Optical cryptography under PPM-PAM modulation based in short optical pulses in an acoustic-optic tunable filter (AOTF)

“…The manufacturing process of AOTF and the physical consequences of the choice of the material used to built it are discussed can be found in another place (Sobrinho et al 2006a;Sobrinho et al 2002aSobrinho et al , 2006bJung et al 2005;Yariv and Yeh 1984;Xu and Stroud 1992). In our study we are considering a centrosymmetric material, as the germanium crystal (Ge), to avoid the presence of the effects of second-order [χ (2) ] nonlinear susceptibility.…”

“…In this context, acousto-optic tunable filters (AOTF) have been played a strategic role in the scenery of the photonic technology and all-optical devices, arousing the crescent interests of many researchers (Sobrinho et al 2002b(Sobrinho et al , 2004Onaka et al 2008;Veeriah et al 2007;Sobrinho et al 2006a;Sobrinho et al 2002a;Gao et al 2006;Sobrinho et al 2006b;Li et al 2002;Jung et al 2005). An AOTF with an integrated optical waveguide on a lithium niobate substrate brings the advantages of high-speed switching characteristics, wideband wavelength selectivity, and compactness.…”