A 4 x 4 nonblocking integrated acoustooptic space switch has been realized, for the first time, in a Y-cut LiNbO3 channel-planar-channel composite waveguide 0. 1 x 1.0 x 3.0 cm3 in size. The switch consists of four parallel channel waveguides at the input, a large aperture TIPE collimating-focussing lens pair, an array of four tilted SAW transducers, and four parallel channel waveguides at the output. Measured performances for nonblocking switching at the optical wavelength of 0.6328 micron include a worst-case crosstalk of - 15.6dB, an average throughput of -16.OdB, a frequency resolution frequency increment required for switching between adjacent output ports of 18.0 MHz, and a reconfiguration time of 0.145 micron sec. Capabilities of the switch for performing strictly nonblocking point-to-point, multi-cast as well as multipoint-to-point were also readily demonstrated.
This article is from 'OSA Proceedings of the International Topical Meeting on Photonic Switching Held in Salt Lake City, Utah on 6-8 March 1991. Volume 8,' AD-A253 026, p10 thru p13.