Browsing by Author "Chen, Young-Kai"

Now showing 1 - 9 of 9

56-Gbps 4-PAM System over Nearly 40 km Transmission by Employing an O-band EML and SOA
(2017-01-01)
Hong-Minh Nguyen
;
Chuang, Chun-Yen
;
Shie, Bobby
;
Wei, Chia-Chien
;
Liu, Jun-Jie
This work demonstrates a 56-Gbps 4-PAM EML-based transmission system. Using an O-band SIA to increase power budget and FFE/DFE to compensate SIA-induced ISM 37.8-km transmission is successfully implemented with BER below the FEC limit (2 x 10(-4)).
67.6% Improvement in Data Rate Employing Partial Transmit Sequence for PAPR Reduction and Volterra Filtering in an OFDM Long-Reach PON
(2017-01-01)
Chuang, Chun-Yen
;
Hsu, Chia-Wei
;
Wei, Chia-Chien
;
Liu, Jun-Jie
;
Nguyen, Hong-Minh
We applied partial transmit sequence and Volterra filtering to achieve 67.6% improvement in capacity in a high-launch-power 60-km OFDM LR-PON. 61-Gbps capacity and 30-dB loss budget were realized to support 64 ONUs with 0.95 Gbps/ONU.
81.7% Complexity Reduction of Volterra Nonlinear Equalizer by Adopting L1 Regularization Penalty in an OFDM Long-Reach PON
(2017-01-01)
Lu, Shao-Yu
;
Wei, Chia-Chien
;
Chuang, Chun-Yen
;
Chen, Young-Kai
;
Chen, Jyehong
We successfully reduce 81.7% complexity of 3rd-order Volterra nonlinear equalizer and the data rate has only 2% reduction by adopting the L1 regularization penalty in a 60-km OFDM long-reach PON.
A High Loss Budget 400-Gbps WDM-OFDM Long-Reach PON over 60 km Transmission by 10G-class EAM and PIN without In-line or Pre-Amplifier
(2017-01-01)
Chuang, Chun-Yen
;
Wei, Chia-Chien
;
Liu, Jun-Jie
;
Wu, Hsin-Yu
;
Hong-Minh Nguyen
A 400-Gbps WDM-OFDM LR-PON over 60-km SMF is demonstrated with a 10G class EAM and PIN. 25-dB loss budget is realized without in-line or pre-amplifier to economically support 128 ONUs with 3.1-Gbps/ONU capacity.
Comparison of VSB PAM4 and OOK Signal in an EML-Based 80-km Transmission System
(2017-12-01)
Chen, Hsing-Yu
;
Lee, Jeffrey
;
Kaneda, Noriaki
;
Chen, Jyehong
;
Chen, Young-Kai
A comparison between 51.84-Gb/s vestigial sideband 4-level pulse amplitude modulation (PAM4) and ON-OFF keying (OOK) signals at a transmission distance of 80 km is experimentally demonstrated for the first time. An electro-absorption modulated laser-based intensity-modulation and direct-detection 80-km transmission is achieved using both modulation formats without dispersion compensating fiber. The relative frequency between single sideband filter and signal is adjusted to find an optimized condition for both carrier to signal power ratio and sideband suppression ratio. The experimental results show that with linear equalization and without bandwidth limitation, the OOK signal has a 4-dB better sensitivity compared with PAM4 after 80-km standard single-mode fiber transmission.
Convolutional Neural Network based Nonlinear Classifier for 112-Gbps High Speed Optical Link
(2018-01-01)
Chuang, Chun-Yen
;
Liu, Li-Chun
;
Wei, Chia-Chien
;
Liu, Jun-Jie
;
Henrickson, Lindor
We have designed a novel convolutional neural network based nonlinear classifier that outperforms traditional Volterra nonlinear equalizers. A BER of 3.50 x 10(-6) is obtained for a 112-Gbps PAM4 EML-based optical link over 40-km SMF transmission.
Employing Deep Neural Network for High Speed 4-PAM Optical Interconnect
(2017-01-01)
Chuang, Chun-Yen
;
Wei, Chia-Chien
;
Lin, Tien-Chien
;
Chi, Kai-Lun
;
Liu, Li-Chun
We implement a deep neural network (DNN) to attain a 64-Gbps 4-PAM, 4-km MMF link by using 850-nm VCSEL, with BER of 4.41 x 10(-5). The data-rate-distance product achieves recorded high of 256-Gbps.km for Inter-data center applications.
Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system
(2017-03-20)
Chen, Hsing-Yu
;
Kaneda, Noriaki
;
Lee, Jeffrey
;
Chen, Jyehong
;
Chen, Young-Kai
The feasibility of a single sideband (SSB) PAM4 intensity-modulation and directdetection (IM/DD) transmission based on a CMOS ADC and DAC is experimentally demonstrated in this work. To cost effectively build a >50 Gb/s system as well as to extend the transmission distance, a low cost EML and a passive optical filter are utilized to generate the SSB signal. However, the EML-induced chirp and dispersion-induced power fading limit the requirements of the SSB filter. To separate the effect of signal-signal beating interference, filters with different roll-off factors are employed to demonstrate the performance tolerance at different transmission distance. Moreover, a high resolution spectrum analysis is proposed to depict the system limitation. Experimental results show that a minimum roll-off factor of 7 dB/10GHz is required to achieve a 51.84Gb/s 40-km transmission with only linear feedforward equalization. (C) 2017 Optical Society of America
Sparse Volterra Nonlinear Equalizer by Employing Pruning Algorithm for High-Speed PAM-4 850-nm VCSEL Optical Interconnect
(2019-01-01)
Chuang, Chun-Yen
;
Chang, Wei-Fan
;
Wei, Chia-Chien
;
Ho, Ching-Ju
;
Huang, Cheng-Yu
A pruned Volterra equalizer that reduces computational complexity by up to 85.2% in 112-Gbps PAM-4 optical interconnects is proposed. The BER performance is competitive with LASSO-based Volterra equalizers, and training time is twice as fast.