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This paper presents WDM transmission at 2μm over 1.15km of HC-PBGF with wavelength channels selected to span a 36.3nm waveband. A total capacity of 81Gbit/s was achieved using 4×12.5Gbit/s NRZ-OOK external modulation and 4×7.7Gbit/s 4-ASK Fast-OFDM direct modulation signals.
We demonstrate all-optical clock recovery by using amplified-feedback laser with coherent injection, which can recover 40 Gb/s optical clock from degraded signal even with low OSNR of 7 dB, or large CD of 408 ps/nm.
We propose a novel method to achieve precise symbol synchronization using one training symbol in DSB optical fast OFDM (FOFDM). World-first FOFDM transmission experiment using field-installed fiber verifies its robustness to the noise and CD.
We propose full-field detection based multi-chip MLSE to improve the receiver sensitivity, CD tolerance, and flexibility of the AMZI delay of the offset-DQPSK format, while retaining the simplicity of its pre-coder and single-AMZI demodulator.
We propose a novel maximum a posteriori probability (MAP) detector in coherent WDM systems, which exhibits significant improvement in back-to-back receiver sensitivity, chromatic dispersion and phase misalignment tolerance.
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