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31% DC to RF differential efficiency of the mode-locked laser's output electrical signal is reported for the first time. The external quantum efficiency of the saturable absorber and the operating regime are also analyzed.
A newly-developed EO modulator with patch antenna-coupled resonator electrodes for converting wireless microwave signals to optical signals is presented. The directivity control using the polarization reversal technique with improved microwave-lightwave conversion efficiency is experimentally demonstrated.
Thanks to excess pre-compensation of chromatic dispersion and a custom UWB antenna with a band-pass characteristic, fully FCC-compliant and dispersion tolerant UWB-IR-over-fiber transmission is experimentally demonstrated for the first time.
A novel and simple technique for the generation of a stable and frequency-tunable microwave signal using a polarization modulator and a wavelength-fixed notch filter is proposed and experimentally demonstrated.
We demonstrate all-optical ultra-wideband doublet pulse generation by single SOA and 1 km SMF. The doublet pulses are transmitted over 5 km SMF by dispersion compensation without degradation. The pulse shape modulation is also shown.
An injection-locked optoelectronic oscillator (OEO) is investigated for the effects of simultaneous forward and reverse injections between the master and slave OEOs to find the optimized condition for low phase noise and spurious levels.
This paper provides an overview of state-of-art photonic technologies for microwave generation, transmission and processing. Technologies discussed include: low phase noise RF oscillators, high-fidelity fiber-optic links, and applications of photonics to RF filtering and processing.
Photonic generation of ultrawideband monocycle pulses is experimentally demonstrated by using a cascaded semiconductor optical amplifier and electroabsorption modulator. The polarity and the shape of the ultrawideband monocycle pulses can be electrically controlled and optimized.
We present optical ultrawideband doublet generation from NRZ-DPSK signals based on a length of SMF. The generated ultrawideband spectra using 25km SMF and 15km SMF are analyzed contrastively.
We present optical ultrawideband doublet generation from NRZ-DPSK signals based on a length of SMF. The generated ultrawideband spectra using 25km SMF and 15km SMF are analyzed contrastively.
Lossless matching circuits are integrated into PhAIAs used in a 2.4GHz wireless-over-fibre link. The system uses a 220m in-building multi-mode-fibre and results show a greater than 10dB improvement in signal strength and improved throughput.
Millimetre wave radio-over-fibre links using both singlemode and multimode fibres are demonstrated over a 0–50GHz bandwidth operating at 1550nm. Results show that good link gain can be achieved with both single mode and multimode detectors.
We report matched filtering of ultra-wideband microwave waveforms via programmable optical phase filters implemented in a hyperfine resolution pulse shaper. As an example we demonstrate compression of an 800-ps electrical chirp waveform to 42 ps.
A novel electro-optic microwave-lightwave converter using antenna-coupled modulation electrodes and polarization-reversed structures is proposed. It can convert several wireless signals coming from different directions to different optical signals respectively. Basic operations at 15GHz were presented.
Millimetre wave radio-over-fibre links using both singlemode and multimode fibres are demonstrated over a 0-50 GHz bandwidth operating at 1550 nm. Results show that good link gain can be achieved with both single mode and multimode detectors.
We report matched filtering of ultra-wideband microwave waveforms via programmable optical phase filters implemented in a hyperfine resolution pulse shaper. As an example we demonstrate compression of an 800-ps electrical chirp waveform to 42 ps.
A novel electro-optic microwave-lightwave converter using antenna-coupled modulation electrodes and polarization-reversed structures is proposed. It can convert several wireless signals coming from different directions to different optical signals respectively. Basic operations at 15 GHz were presented.
We present optical ultrawideband doublet generation from NRZ-DPSK signals based on a length of SMF. The generated ultrawideband spectra using 25 km SMF and 15 km SMF are analyzed contrastively.
Lossless matching circuits are integrated into PhAlAs used in a 2.4 GHz wireless-over-fibre link. The system uses a 220 m in-building multi-mode-fibre and results show a greater than 10 dB improvement in signal strength and improved throughput.
Based on unequally-spaced incremental time delays, the desired complicated band-pass filtering responses can be realized by the traditional incoherent all-optical microwave transversal filters. The reconfigurability and resonance tunability can be traditionally achieved.
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