Large time-bandwidth product acoustooptic correlator and its use in a cascade design matched filter

Area of Science:

• Optics and Photonics
• Signal Processing
• Materials Science

Background:

• Acoustooptic correlators are essential for signal processing applications.
• Previous designs faced limitations in time-bandwidth product.
• Lead molybdate (PbMoO4) is a suitable material for acoustooptic devices.

Purpose of the Study:

• To construct and evaluate an acoustooptic correlator using PbMoO4 deflectors.
• To introduce and analyze a new matched filter concept for enhanced signal processing.
• To achieve a high time-bandwidth product for advanced applications.

Main Methods:

• Construction of an acoustooptic correlator utilizing PbMoO4 deflectors with a 7.5 microsecond acoustic transit time.
• Testing the correlator's performance at 40 MHz with a 127-bit pseudonoise code.
• Development of a hybrid matched filter combining digital electronics and acoustooptic techniques.

Main Results:

• Successful operation of the acoustooptic correlator at 40 MHz with a 127-bit pseudonoise code.
• Demonstration of the feasibility of the new matched filter concept.
• The proposed hybrid approach enables an almost unlimited time-bandwidth product.

Conclusions:

• The developed acoustooptic correlator is effective for high-frequency signal processing.
• The novel matched filter concept significantly enhances the time-bandwidth product capabilities.
• This hybrid acoustooptic-digital approach represents a significant advancement in signal processing technology.