Accession Number : ADP007370

Title :   4 X 4 Nonblocking Acousto-Optic Waveguide Space Switch,

Corporate Author : CALIFORNIA UNIV IRVINE

Personal Author(s) : Tsai, Chen S. ; Le, Phat

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : 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.

Descriptors :   *OPTICAL SWITCHING, *ELECTRONIC SWITCHES, *SURFACE ACOUSTIC WAVE DEVICES, ACOUSTOOPTICS, APERTURES, ARRAYS, CHANNELS, CROSSTALK, FREQUENCY, INPUT, OUTPUT, THROUGHPUT, TIME, TRANSDUCERS, LITHIUM NIOBATES, OPTICAL WAVEGUIDES.

Subject Categories : Electrooptical and Optoelectronic Devices
      Acoustooptic and Optoacoustic Devices
      Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE