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| Titel: |
Acousto-Optic Tunable Filter (AOTF) Revisited: Ultrashort Optical Pulses Crosstalk Studies on the Lossy Filter |
| Auteur: |
Sobrinho, C. S. Filho, A. F. G. F. Sales, J. C. Neto, A. F. M. De Almeida, E. F. Sombra, A. S. B. |
| Verschenen in: |
Fiber & integrated optics |
| Paginering: | Jaargang 25 (2006) nr. 3 pagina's 195-211 |
| Jaar: |
2006-07-01 |
| Inhoud: |
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 (αdB = 4 dB/mm) considering five nonlinearity profiles. One can observe that there is always an optimum value for δ (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 δ obtained from the compression studies, as a function of the pump power (P0) 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. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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