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Clock extraction from 10-Gb/s NRZ-DPSK signal using a cascaded long-period fiber grating is experimentally demonstrated. The resultant clock has low timing jitter of <1 ps. The method is easily applicable up to 640-Gb/s.
We propose and demonstrate a novel optical differential phase-shift keying (DPSK) demodulator with an optically tunable phase shifter. The proposed DPSK demodulator is implemented by using a pi-phase-shifted fiber Bragg grating and an Yb3+-Al3+ codoped optical fiber. A 10-Gb/s DPSK signal was successfully demodulated by the proposed demodulator, showing clearly open eye diagrams as well as bit-error-free...
A novel optical DPSK demodulator with optically tunable phase shifter based on pi-phase shifted fiber Bragg grating is proposed and demonstrated. The 10 Gb/s DPSK signal is successfully demodulated by the proposed DPSK demodulator
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