<title>Micro-optic design for an acousto-optic rf adaptive filter</title>

Abstract

Abstract This paper describes potential designs for a miniaturized Acousto-Optic Radio Frequency signal excisionsystem with adaptive frequency control. It is proposed that diffractive micro-optical techniques can be used toreduce the system size to 1 mm height, 10 mm width, and 24 mm length (best case). These dimensions compare insize to an integrated optics waveguide approach, but the micro-optics design uses optimized discrete components.This small dimension comes at the expense of a relatively low time bandwidth product, where a value of N = 200 was used. 1. Introduction Recent developments in adaptive optical power limiting materials have created interest in applying them tohigh-speed adaptive notch filters. One application is interference reduction for wideband RF receivers, such as GPSreceivers. The filtering material may be amenable to an integrated optics implementation; however, over the lastfifteen years only marginal progress toward optimization of an integrated optic Acousto Optic (AO) signal processorhas occurred. In the mean time, remarkable progress in micro-lens fabrication has occurred, and their utilitysuggests that these devices could be used to fabricate high performance miniaturized AO signal processor systems.