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We propose and demonstrate a novel microwave photonic filter. The microwave filter can obtain responses of a bandpass filter and a notch filter simultaneously. The microwave filter is realized based on a recirculating delay line loop (RDLL) and a cascaded delay interferometer (DI). At the two different output ports of DI, a bandpass filter and a notch filter are obtained respectively.
A high Q microwave photonic filter is proposed and experimentally demonstrated. It is based on a recirculating delay line comprising a semiconductor optical amplifier used to generate negative tap. A frequency response with a high Q of 543, a rejection ratio of 40 dB and good shape factor is obtained.
We proposed and demonstrated a simple 2-to-4 line photonic decoder at 40 Gbit/s based on the demodulation properties of two fiber delay interferometers (FDIs) and cross gain modulation (XGM) of four parallel semiconductor optical amplifiers (SOAs). Four logic minterms with high extinction ratio (ER), clear and wide open eye diagrams were obtained simultaneously without continuous-wave (CW) probe lasers.
A microwave photonic filter with passband and stopband interchanged is proposed and demonstrated. The structure is based on a recirculating delay line loop comprising a semiconductor optical amplifier (SOA) and a tunable narrowband optical filter, converted signal used as negative tap is generated employing the cross-gain modulation of the amplified spontaneous emission spectrum of the SOA. The filter...
We demonstrate extinction ratio improvement at 80 Gbit/s wavelength conversion using a single semiconductor optical amplifier cascaded with a delay interferometer and band pass filters. The output extinction ratio can be improved from 3.2 dB to 20 dB.
We propose and demonstrate a simple and flexible all-optical NRZ-DQPSK receiver based on optical detuned filtering. By adjusting the detuning of two given filters, the in-phase and quadrature data can be demodulated from 20-to-80Gb/s NRZ-DQPSK signals.
A microwave photonic interference mitigation filter is proposed and experimentally demonstrated. The structure is based on a recirculating delay line comprising a semiconductor optical amplifier used to generate negative tap. A bandpass response with negative coefficients and a broadband allpass response are combined to achieve notch response with flat passband.
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