| 摘要 |
An acousto-optical tunable filter, comprising planar optical waveguide ( 2 ) for propagation of light beam ( 14 ), and arranged sequentially along the path of the light radiation: a means for forming a light beam, transducer ( 16 ) of acoustic waves suited to generate acoustic wave ( 15 ) that is capable of interacting with the beam light waves and cause their diffraction within a predetermined wavelength range, and a means for selecting the diffracted portion of the light beam. The light beam forming means and selecting means are implemented in the form of stripe waveguides ( 3 ) and ( 4 - 7 ) respectively disposed in the plane of the planar waveguide and each provided with a set of unit reflectors ( 10 ) and ( 11 ) that overlap an aperture of corresponding stripe waveguide ( 3 ), the relative position and inclination angle of which reflectors being selected to maintain phase difference at the operating radiation wavelength for any pair of beams ( 13 ) reflected from different unit reflectors ( 10 ), which value essentially is multiple of 2pi.
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