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We presented a 32-channel silicon hybrid demultiplexer fabricated with CMOS technology. Double-etched mode converter and wide arrayed waveguide are used to improve AWG performances while the counter-tapered coupler is optimized for broadband mode multiplexing.
Our IM/DD techniques investigations are reviewed. Poly-binary is low complexity and good for the 5G fronthaul and DCI scenarios while DMT is suitable for metro transmission due to better bandwidth utilization and higher dispersion tolerance.
We demonstrate a 56 Gb/s DMT signal using a compact silicon microring modulator. The measured bit error rate of back to back modulated signal is well below the FEC limit.
Base on a DDMZM, we propose and demonstrate a 100-Gb/s system for 80km SMF transmission using direct-detection eSSB-DMT. Furthermore, a twin-SSB-DMT is realized based on the same transmitter architecture and 200Gb/s over 80km SMF is successfully demonstrated with novel receiver and MIMO-array DSP.
A novel fiber-to-chip edge coupler with two tapered tips and a multimode interference combiner is demonstrated on a silicon-on-insulator platform. It has advantages over a single-tip edge coupler on coupling loss, bandwidth and misalignment tolerance.
We report a novel single-lane 112-Gbps system based on SFP module with 10km SSMF reach employing a duobinary 4-PAM modulation. Impairment caused by electrical circuit is compensated by digital pre-distortion techniques.
We presented a comparison and analysis on single-layer silicon fiber-to-chip edge couplers with different taper tips. The double-tip edge coupler exhibits a lower coupling loss, larger bandwidth and better fabrication tolerance. In addition, the short edge couplers with 40 μm length have the best performances.
We experimentally demonstrate 56-Gbps optical interconnection over 1 km SSMF by using 10G 1550nm VCSEL. PAM4 and Poly-PAM4 MLSE algorithms are developed to optimize the system performance and overcome the chirp-chromatic-dispersion induced power degradation after 1 km fiber transmission.
We experimentally demonstrate 112-Gb/s DMT transmission over 80-km SMF using low-cost direct-detection architecture based on a novel twin-SSB-DMT technique. High capacities up to 146Gb/s, 138Gb/s and 130Gb/s are achieved with BER at 4.5×1 0−3 for BTB, 40-km and 80-km SMF transmissions, respectively.
We experimentally demonstrated an 850-nm VCSEL based 112-Gb/s short reach interconnection system with 200-m MMF transmission employing a duobinary 4-PAM format. The sensitivity of −4.8 dBm at the 6.7% overhead FEC limit (BER=4.2×10−4) was achieved.
High performance silicon IQ modulator is fabricated and used to demonstrate the first 56 Gb/s direct detected single-sideband DMT transmission over 320-km SMF. The required OSNR of 26.3 dB at BER of 3.7×10−3 was achieved.
C-band 100-Gb/s discrete multi-tone modulation transmission over 80-km single mode fiber without CD compensation is experimentally demonstrated. By using dual-drive Mach-Zehnder modulator-assisted single-sideband modulation, CD induced power fading is eliminated after direct detection.
Single wavelength 56Gbps transmission in 640km dispersion-unmanaged link is successfully realized by using direct-detection discrete multi-tone (DMT) modulation method. A single polarization IQ modulator is used to do chromatic dispersion pre-compensation and generate single sideband (SSB) DMT signal. Just one PIN is used to detect the received signal to reduce the cost. More than 3000ps/nm chromatic...
C-band 56Gbps transmission over 80-km single mode fiber without chromatic dispersion compensation is realized by using discrete multi-tone modulation based on low cost electro-absorption modulated laser and receiver. The required OSNR of 26.3 dB at BER of 4E-3 is achieved.
Small cell is a promising solution for the future wireless solution. Its use cases and challenges are discussed. Then the small cells backhaul options are reviewed and the Common Packet Radio Interface (CPRI) over Optical Transport Network (OTN) is proposed as an important scheme.
We have proposed a T-SDN by applying SDN technologies on transport networks. A Transport Controller is introduced as a centralized control system to perform intelligent control of FBON and furthermore establish an open transport network.
This paper demonstrates DAC based 56Gbaud PDM-QPSK transmission for 200Gbit/s, which provides a spectral efficiency of 4 bit/s/Hz on the 50GHz grid. Compared with 32Gbaud-16QAM, it has a better transmission performance.
We present a novel CDC-ROADM architecture based on flexible wavelength router which consists of two N×N WSSs. The proposed architecture is compact, low cost and provides a fully 1+1 redundant solution with high resilience.
A Wiener deconvolution approach is proposed to monitor optical power of O-OFDM superchannel network. The impacts of TOF's bandwidth and scanning steps on power estimation performance have been studied. Simulation results show that the proposed approach can accurately monitor the power of various transmission systems via low cost TOF with optimized parameters.
We report a state-of-the-art all-optical metro network prototype supporting 1.6-Tb/s capacity and 400-km coverage. Centralized DBA based statistical multiplexing was realized for the first time, leading high bandwidth utilization of 80% and low end-to-end latency.
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