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A photonic-assisted microwave phase shifter using phase modulator and fiber-Bragg-grating in a round trip configuration is proposed. The phase of 20∼30 GHz microwave signals can be shifted by properly adjusting the voltage of PM-driving signal.
Multiform spectral shaping schemes to provide tunability on the shape, free spectral range and bandwidth of microwave photonic signals are reviewed. By utilizing specific dispersion-based conversion techniques, the proposed scheme scan be widely used to achieve flexible manipulation of microwave signals.
All-optical RZ to NRZ format conversion for two tributaries of a PDM signals simultaneously is demonstrated through a single highly nonlinear fiber with polarization nonlinear loop mirror configuration. Less than 1-dB power penalty is achieved.
A synthesis scheme to generate microwave triangular-shaped pulses based on spectral shaping and frequency-to-time mapping is proposed. Triangular-shaped signals with periods of 0.2ns, 0.4ns, 1.6ns and pulse widths of 0.13ns, 0.35ns are demonstrated.
PMD mitigation in 2×10-Gb/s RZ-OOK PDM systems is demonstrated through a single all-optical-regenerator with polarization-diversified loop configuration. 3.0-dB eye-diagram-based SNR improvement is achieved in the presence of 6.3-ps DGD for RZ signals with 18-ps pulsewidth.
Schemes of all-optical regeneration in polarization-division-multiplexing (PDM) systems are proposed and demonstrated with 2 10-Gb/s return-to-zero on–off-keying (RZ-OOK) transmission. Regeneration is achieved based on self-phase-modulation (SPM) effect and detuned filtering in highly nonlinear fiber (HNLF) with a polarization-diversified loop configuration. Furthermore, the ability of mitigating...
A novel approach to generate frequency and pulse-width adjustable carrier signals using all-fiber components is proposed and demonstrated. The technique is using an all-fiber spectrum shaper which is consisted of a variable differential group delay (DGD) element and a bandwidth-tunable optical filter, to produce required optical power spectrum. Due to the frequency-to-time conversion in a dispersive...
We propose a new automatic optical polarization demultiplexing scheme for polarization-division-multiplexed (PDM) signals, which uses the tag light transmitted in a different but close wavelength to the data signal as the feedback control. The effectiveness of this scheme is demonstrated in a 10-Gb/s PDM optical system over 50-km SMF link.
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