Design, construction and performance characteristics of the optically addressed transmission mode SLM based on the Chalcogenide Glass Photoconductor-Liquid Crystal structure is discussed in this paper. Utilization of an SLM of this type for adaptive signal processing is proposed. It allows one to significantly simplify the structure of a multi- channel adaptive RF signal processor.
Adaptive beamforming is a technique to suppress the interference coupled to the antenna through the antenna sidelobes and minimize the corruption ofthe signal of interest by means of adaptively tracking the source of interference with the nulls of radiation pattern [1-2]. Adaptivity is vital to a host of mission-critical applications, for which jamming suppression in a radar has been studied extensively [3]. As the time-bandwidth product (TBWP) of the adaptive processor increases, the computational burden rapidly exceeds the capabilities of the state-of-the art integrated microelectronics technology. A computation power of 1013 bps may be required. Insufficient parallelism has limited performance of electronic radar processors to approximately 50 dB jam suppression over the bandwidth of 1 MHz.
Wideband optical signal processing for adaptive antennas calls for a high-performance spatial light amplifier (SLA). The latter can be implemented as an upgrade of micro-channel SLA by replacing bulk crystal with a single-crystal fiber array (SCFA). This paper is focused on SCFA fabrication. The design process from specifying SCFA parameters to selecting fabrication technique (dice-and-fill or laser-heated pedestal growth) is reviewed. The results achieved with the dice-and- fill method are presented.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.