Optimization of transducer configuration for bulk acousto-optic tunable filters

Pál Maák, Sándor Lenk, László Jakab, Attila Barócsi, Péter Richter

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the present paper, we discuss the effect of an easily implemented type of transducer electrode segmentation on the electrical and optical performance of bulk acousto-optic filters. Segmentation consisting in transducer upper electrode shaping allows realization of filters with very large interaction length with transducer electric impedances not far from the 50 Ω of the generator output's standard impedance. Detailed experimental investigation of the influence of the electrode shape on the electrical, acoustical and acousto-optical performance has been effectuated through comparison of filters with segmented and non-segmented transducer electrodes. It was demonstrated that the positive effect of the electrode segmentation on the electrical behavior and optical wavelength dependent throughput uniformity is reduced by increased optical aperture inhomogeneity and somewhat decreased optical resolution. Practical application of both segmented and non-segmented transducers has its justification depending on the application type and available electronic environment.

Original languageEnglish
Pages (from-to)87-98
Number of pages12
JournalOptics Communications
Volume241
Issue number1-3
DOIs
Publication statusPublished - Nov 1 2004

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Keywords

  • Acoustic transducers
  • Acousto-optic filters
  • Impedance matching
  • Optical spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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