Wavelength-selective optical device utilizing a selectively variable surface acoustic wave grating in a polar organic material

摘要

PCT No. PCT/GB92/01701 Sec. 371 Date Jul. 11, 1994 Sec. 102(e) Date Jul. 11, 1994 PCT Filed Aug. 16, 1992 PCT Pub. No. WO93/06518 PCT Pub. Date Apr. 1, 1993.A wavelength-selective arrangement interacts with optical radiation propagating in a transmission medium. The arrangement includes a selector member made of a polar organic material which exhibits piezoelectric properties, the selector member having an interaction surface for interacting with the radiation. The selector member is provided with structure for propagating surface acoustic waves along the interaction surface so as to create a grating and thereby determine its interacting properties in relation to the wavelength of the radiation, in a selectively variable manner.