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Photonic-assisted microwave frequency multiplication with a tunable multiplication factor.
Optics Letters
|November 2, 2013
Summary
This study demonstrates tunable microwave frequency multiplication using an optical comb and a microwave photonic filter (MPF). The system generates a single-frequency multiplied microwave signal with a tunable multiplication factor.
Area of Science:
- Photonics
- Microwave Engineering
- Optical Signal Processing
Background:
- Microwave frequency multiplication is crucial for various applications.
- Existing methods often face limitations in tunability and signal purity.
- Photonic approaches offer potential for enhanced performance.
Purpose of the Study:
- To propose and demonstrate a novel photonic-assisted microwave frequency multiplication system.
- To achieve a tunable multiplication factor (MF) for the generated microwave signal.
- To investigate the phase noise and frequency tunability of the system.
Main Methods:
- Generating an optical comb using two cascaded modulators driven by a microwave reference signal.
- Utilizing a single-passband microwave photonic filter (MPF) to select a specific harmonic from the optical comb.
- Forming the MPF using a sliced broadband optical source and dispersion-compensating fiber (DCF).
Main Results:
- Experimental demonstration of photonic-assisted microwave frequency multiplication.
- Achieved a tunable multiplication factor (MF) ranging from 1 to 5.
- Generated a single-frequency, frequency-multiplied microwave signal with investigated phase noise and tunability.
Conclusions:
- The proposed system successfully enables tunable microwave frequency multiplication.
- The use of an embedded MPF allows for precise selection of harmonics.
- This photonic approach offers a flexible and efficient method for generating high-purity microwave signals.
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