Accession Number : ADP008089

Title :   Programmable Electro-Optic Waveguide Filter,

Corporate Author : OKI ELECTRIC INDUSTRY CO LTD TOKYO (JAPAN)

Personal Author(s) : Okayama, H. ; Kawahara, M.

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : Optical switching systems using the wavelength multiplexing technique are considered to be suitable for exchanging large numbers of channels. Electrooptic wavelength tunable filters are one of the key components in this type of system. The electrooptic filters which have been studied have only been capable of selecting single channels. Filters using the acoustooptic effect can overcome this limitation, but the switching speed is slow. A bulk type programmable filter has been proposed. However, to achieve a narrow transmission bandwidth, the number of electrodes and drive circuits increases substantially. Here, we will propose devices that can overcome these limitations using the inherently high speed electrooptic effect. The structures of the devices which we propose are shown. The structure of the device shown is composed of multisection TM/TE mode converters with interdigital electrodes (IDT). However, each section of the mode converter and phase shifter is controlled independently.

Descriptors :   *ACOUSTOOPTICS, *ELECTROOPTICS, *OPTICAL SWITCHING, *OPTICAL CIRCUITS, BANDWIDTH, CHANNELS, CONVERTERS, DRIVES, ELECTRODES, LIMITATIONS, MULTIPLEXING, PHASE, STRUCTURES, OPTICAL FILTERS, PHASE SHIFT CIRCUITS.

Subject Categories : Electrooptical and Optoelectronic Devices
      Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE