Nonuniformly-spaced photonic microwave delayline filter

Area of Science:

• Photonics
• Microwave Engineering
• Signal Processing

Background:

• Photonic microwave delay-line filters are crucial for signal processing.
• Traditional filters with uniform tap spacing have limitations in achieving arbitrary responses.

Purpose of the Study:

• To propose and demonstrate a novel technique for implementing photonic microwave delay-line filters.
• To achieve arbitrary bandpass responses using nonuniform tap spacing.
• To enable the use of only positive taps for filter implementation.

Main Methods:

• Development of a photonic microwave delay-line filter architecture with nonuniformly spaced taps.
• Experimental demonstration of the proposed filter technique.
• Implementation of a flat-top bandpass filter as a specific application.

Main Results:

• Successful implementation of a photonic microwave delay-line filter with nonuniform tap spacing.
• Demonstration of the ability to achieve arbitrary bandpass responses.
• Experimental validation of the flat-top bandpass filter using the proposed technique.

Conclusions:

• Nonuniform tap spacing is an effective method for designing photonic microwave delay-line filters with arbitrary bandpass responses.
• The proposed technique simplifies filter design by allowing the use of only positive taps.
• This advancement offers greater flexibility in photonic microwave filter applications.