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Lossless and high-resolution RF photonic notch filter
Optics Letters
|November 15, 2016
Summary
A new technique creates a lossless radio frequency (RF) photonic bandstop filter with ultra-high suppression. This advanced filter offers tunable bandwidth and wide frequency tunability for improved spectrum management.
Area of Science:
- Photonics
- Optical Engineering
- Radio Frequency (RF) Engineering
Background:
- Traditional RF filters often suffer from insertion loss and limited tunability.
- Achieving ultra-high suppression in RF photonic filters is challenging.
Purpose of the Study:
- To demonstrate a novel technique for creating a lossless and tunable RF photonic bandstop filter.
- To achieve ultra-high suppression and wide frequency tunability in an RF photonic filter.
Main Methods:
- Utilizing an overcoupled optical ring resonator.
- Employing tailored stimulated Brillouin scattering (SBS) gain.
- Precise amplitude and phase tailoring in the optical domain.
Main Results:
- Demonstrated a minimum insertion loss below 0 dB.
- Achieved high isolation exceeding 50 dB.
- Obtained a tunable 3 dB bandwidth from 60-220 MHz with wide frequency tunability (1-11 GHz).
Conclusions:
- The developed RF photonic bandstop filter offers simultaneous low loss, high selectivity, and tunable bandwidth.
- This technology enables advanced spectrum management with improved signal-to-noise ratio.
- The technique provides a pathway for next-generation RF photonic devices.
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