Title :
Integrated acoustooptic device modules in LiNbO3 for digital data processing
Author :
Zang, D.Y. ; Le, P. ; Tsai, C.S.
Author_Institution :
Dept. of Electr. Eng., California Univ., Irvine, CA, USA
Abstract :
A titanium-indiffusion proton-exchange waveguide microlens has been utilized to construct a multichannel integrated acoustooptic module which simultaneously utilizes acoustooptic (AO) and electrooptic (EO) Bragg diffractions in a common LiNbO3 substrate. The module consists of a channel-waveguide array, a planar waveguide, a linear microlens array, an AO Bragg modulator, an EO Bragg modulator array, and a large-aperture lens in a substrate 0.1×1.0×2.0 cm3 in size. A novel scheme for simultaneous excitation of the entire channel-waveguide array was devised to facilitate experimentation of the multichannel module for applications in digital data processing. The autocorrelation and cross-correlation waveforms between binary sequence obtained using amplitude-modulated SAW (surface acoustic waves) at 16.7 Mb/s and voltage-modulated EO gratings were found to be in excellent agreement with theoretical calculations
Keywords :
acousto-optical devices; integrated optics; lithium compounds; optical waveguides; surface acoustic wave devices; AO Bragg modulator; Bragg diffractions; EO Bragg modulator array; LiNbO3; SAW; autocorrelation; channel-waveguide array; cross-correlation; digital data processing; electrooptic; large-aperture lens; linear microlens array; multichannel integrated acoustooptic module; planar waveguide; waveguide microlens; Acoustooptic devices; Arrayed waveguide gratings; Data processing; Diffraction; Electrooptic modulators; Electrooptical waveguides; Lenses; Microoptics; Planar waveguides; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 1988. Proceedings., IEEE 1988
Conference_Location :
Chicago, IL
DOI :
10.1109/ULTSYM.1988.49417
