IngentaConnect Acousto-Optic Tunable Filter (AOTF) Revisited: Ultrashort Optical...

Authors: Sobrinho, C.¹; Filho, A.²; Sales, J.²; Neto, A.²; De Almeida, E.²; Sombra, A.²

Source: Fiber And Integrated Optics, Volume 25, Number 3, May-June 2006 , pp. 195-211(17)

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Abstract:

We examine again the crosstalk level (Xtalk) and extinction ratio (Xratio) of an acousto-optic tunable filter (AOTF) operating with ultrashort light pulses (2 ps), now considering the loss effect. The compression factor was studied for the switched pulse with lossy AOTF (a dB = 4 dB/mm) considering five nonlinearity profiles. One can observe that there is always an optimum value for d (final value of the nonlinearity) that one can obtain a switched pulse with the same time duration of the input pulse ( C = 1). The compression factor for the switched pulse along the filter length shows that for the constant profile, the compression factor is around 1 all over the device. The study of the crosstalk level (Xtalk) of this device, considering the optimum values of d obtained from the compression studies, as a function of the pump power ( P 0 ) was done. The acousto-optic tunable filter (AOTF) has attracted great attention in recent years, in part because it appears to be a suitable basis for multi-wavelength optical cross-connects. It is probably the only known tunable filter that is capable of selecting several wavelengths simultaneously. This capability can be used to construct a multi-wavelength router.

Keywords: acousto-optic filter; optical crosstalk

Document Type: Research article

DOI: 10.1080/01468030600569834

Affiliations: 1: Departamento de Engenharia de Teleinformática (DETI), Centro de Tecnologia Universidade Federal do Ceará, Fortaleza, Ceará, Brazil 2: Laboratório de Telecomunicaçõ;es e Ciência e Engenharia dos Materiais (LOCEM) Departamento de Física, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil

Acousto-Optic Tunable Filter (AOTF) Revisited: Ultrashort Optical Pulses Crosstalk Studies on the Lossy Filter