Title :
8*8 symmetric nonblocking integrated acoustooptic space switch module on LiNbO/sub 3/
Author :
Kar-Roy, Arjun ; Tsai, Chen S.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA
fDate :
7/1/1992 12:00:00 AM
Abstract :
An 8*8 symmetric nonblocking integrated acoustooptic space switch module has been realized on a Y-cut LiNbO/sub 3/ substrate, 1.0*10.0*37.0 mm in size. The switch module consists of a new hybrid beam expanding-collimating lens, a large aperture focusing lens, and a pair of four-element tilted surface acoustic wave (SAW) transducer arrays in a titanium-in-diffused channel-planar-channel composite waveguide. Experimental results of point-to-point nonblocking switching at the optical wavelength of 0.6328 mu m, including an average crosstalk of -12.2 dB, optical switching efficiency of 25% at 125 mW RF drive power, carrier frequency increment of 13.5 MHz for switching between adjacent output channels and reconfiguration time of 0.4 mu s have been obtained.<>
Keywords :
acousto-optical devices; crosstalk; integrated optics; lenses; lithium compounds; optical switches; surface acoustic wave devices; 0.4 mus; 0.6328 micron; 125 mW; 25 percent; LiNbO/sub 3/; RF drive power; SAW transducer arrays; Ti in diffused; Y-cut; adjacent output channels; average crosstalk; carrier frequency; channel-planar-channel composite waveguide; four-element; hybrid beam expanding-collimating lens; large aperture focusing lens; optical switching efficiency; optical wavelength; point-to-point nonblocking switching; reconfiguration time; surface acoustic wave; symmetric nonblocking integrated acoustooptic space switch module; tilted; Acoustic beams; Acoustic transducers; Acoustic waves; Apertures; Lenses; Optical crosstalk; Optical surface waves; Optical switches; Optical waveguides; Surface acoustic waves;
Journal_Title :
Photonics Technology Letters, IEEE
