Inproceedings,

Picosecond pulse switching in a lossy acousto-optic tunable filter (AOTF)

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IMOC 2001: PROCEEDINGS OF THE 2001 SBMO/IEEE MTT-S INTERNATIONAL MICROWAVE AND OPTOELECTRONICS CONFERENCE: THE CHALLENGE OF THE NEW MILLENIUM: TECHNOLOGICAL DEVELOPMENT WITH ENVIRONMENTAL CONSCIOUSNESS, page 537-540. 345 E 47TH ST, NEW YORK, NY 10017 USA, IEEE; MTTS; Brazilian Microwave & Optoelectr Soc, IEEE, (2001)SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, BELEM, BRAZIL, AUG 06-10, 2001.

Abstract

In this paper, we did a study of the transmission characteristics of the AOTF operating with ultrashort light pulses(2ps). Initially one consider the performance of the device, operating in the nonlinear regime without loss. It was observed that the effect of dispersion and nonlinearity, has strong influence on the pulse propagation when one increase the length of the AOTF. For shorter length of the device the switched pulse is presenting time broadening. For higher length of the device, pulse breakup was observed. Considering the AOTF with loss one consider the device of length 0.25mm with loss of 4dB/mm constructed with an increasing nonlinearity profile. It was observed that the increase of the nonlinearity lead the switched pulse from broadening to optical compression. One can say that one can operate the AOTF in a configuration that one can avoid the pulse break up and have a switched pulse with a shorter time duration compared with the lossy AOTF. The study of the AOTF operating with ultra short optical solitons provides possibilities for achieving, high efficiency in ultrafast all-optical signal processing, especially for optical switches, filters and optical transistors.

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