Showing papers presented at "Optical Fiber Communication Conference in 2020"
15 Jan 2020
TL;DR: This article focuses on IM/DD transmissions, and provides an overview of recent research and development efforts on key enabling technologies for 200 Gbps per lane and beyond, and expects high-speed IM/ DD systems will remain advantageous in terms of system cost, power consumption, and footprint for short reach applications in the short- to mid- term perspective.
Abstract: Client-side optics are facing an ever-increasing upgrading pace, driven by upcoming 5G related services and datacenter applications. The demand for a single lane data rate is soon approaching 200 Gbps. To meet such high-speed requirement, all segments of traditional intensity modulation direct detection (IM/DD) technologies are being challenged. The characteristics of electrical and optoelectronic components and the performance of modulation, coding, and digital signal processing (DSP) techniques are being stretched to their limits. In this context, we witnessed technological breakthroughs in several aspects, including development of broadband devices, novel modulation formats and coding, and high-performance DSP algorithms for the past few years. A great momentum has been accumulated to overcome the aforementioned challenges. In this article, we focus on IM/DD transmissions, and provide an overview of recent research and development efforts on key enabling technologies for 200 Gbps per lane and beyond. Our recent demonstrations of 200 Gbps short-reach transmissions with 4-level pulse amplitude modulation (PAM) and discrete multitone signals are also presented as examples to show the system requirements in terms of device characteristics and DSP performance. Apart from digital coherent technologies and advanced direct detection systems, such as Stokes–vector and Kramers–Kronig schemes, we expect high-speed IM/DD systems will remain advantageous in terms of system cost, power consumption, and footprint for short reach applications in the short- to mid- term perspective.
99 citations
08 Mar 2020
TL;DR: This work demonstrates transmission of 368-WDM-38-core-3-mode × 24.5-GBaud 64- and 256-QAM signals over 13 km with record data-rate and spectral-efficiency enabled by a low DMD 38- core- 3-mode fiber with high uniformity amongst cores.
Abstract: We demonstrate transmission of 368-WDM-38-core-3-mode × 24.5-GBaud 64- and 256-QAM signals over 13 km. Record data-rate and spectral-efficiency of 1158.7 b/s/Hz were enabled by a low DMD 38-core-3-mode fiber with high uniformity amongst cores.
88 citations
08 Mar 2020
TL;DR: An effectively single-moded, 1.7km long hollow core Nested Antiresonant Nodeless Fiber (NANF) is reported with record-low 0.28dB/km loss from 1510 to 1600nm, which further reduces the loss gap with standard all-glass single mode fibers.
Abstract: We report an effectively single-moded, 1.7km long hollow core Nested Antiresonant Nodeless Fiber (NANF) with record-low 0.28dB/km loss from 1510 to 1600nm, which further reduces the loss gap with standard all-glass single mode fibers.
86 citations
08 Mar 2020
TL;DR: Global Foundries' monolithic 45nm CMOS-Silicon Photonics 300mm high-volume manufacturing platform based on 45nm RF technology node, and optimized for high performance and low power short-reach optical interconnects for on-chip and chip-to-chip applications will be discussed.
Abstract: GLOBALFOUNDRIES' monolithic 45nm CMOS-Silicon Photonics 300mm high-volume manufacturing platform based on 45nm RF technology node, and optimized for high performance and low power short-reach optical interconnects for on-chip and chip-to-chip applications will be discussed.
51 citations
08 Mar 2020
TL;DR: It is demonstrated that the SiPIC has sixteen 106Gbps PAM4 optical channels, including lasers, modulators and V-grooves, meeting co-packaged optics requirements for network switch applications.
Abstract: We demonstrate 1.6Tbps Silicon Photonic Integrated Circuit (SiPIC) meeting co-packaged optics requirements for network switch applications. The SiPIC has sixteen 106Gbps PAM4 optical channels, including lasers, modulators and V-grooves. Post-FEC error-free operation over temperature is demonstrated.
41 citations
08 Mar 2020
TL;DR: The experimental implementation of photonic neural network for fiber nonlinearity compensation over a 10,080 km trans-pacific transmission link achieves Q-factor improvement of 0.51 dB with only 0.06 dB lower than numerical simulations.
Abstract: We demonstrate the experimental implementation of photonic neural network for fiber nonlinearity compensation over a 10,080 km trans-pacific transmission link. Q-factor improvement of 0.51 dB is achieved with only 0.06 dB lower than numerical simulations.
38 citations
08 Mar 2020
TL;DR: The recent progress of enabling techniques for the optical wireless communication (OWC) and visible light communication (VLC) and two high data-rate laser-diode (LD) based VLC systems are summarized.
Abstract: We summarized the recent progress of enabling techniques for the optical wireless communication (OWC) and visible light communication (VLC). Besides, we reported two high data-rate laser-diode (LD) based VLC systems. Several application scenarios using VLC were also discussed.
38 citations
08 Mar 2020
TL;DR: A new 128 GSa/s SiGe digital to analog converter supporting data generation at 128 GBaud is reported on, demonstrating successful transmission at 1.55 Tb/s net rate in back to back and 1.52 T b/s after 80 km of SMF.
Abstract: We report on a new 128 GSa/s SiGe digital to analog converter supporting data generation at 128 GBaud. We demonstrate successful transmission at 1.55 Tb/s net rate in back to back and 1.52 Tb/s after 80 km of SMF.
36 citations
08 Mar 2020
TL;DR: A record-breaking 20.09-Gbit/s WDM-VLC transmission over 1.2 m underwater link with PS-bitloading-DMT modulation with a silicon-substrate multichromatic LED array chip and a feasible optical-filter scheme are demonstrated.
Abstract: We demonstrated a record-breaking 20.09-Gbit/s WDM-VLC transmission over 1.2 m underwater link with PS-bitloading-DMT modulation. A silicon-substrate multichromatic LED array chip and a feasible optical-filter scheme are proposed for future LED-based WDM-VLC system.
33 citations
15 Jan 2020
TL;DR: This work presents a real-time 100-GS/s fourth-order single-bit SDM for all-digital RoF transmission in the high-frequency band without the aid of analog/optical up-conversion and corroborates the strong competitiveness of this SDM-based RoF approach in high- frequencies RoF 5G communication.
Abstract: All-digital radio-over-fiber (RoF) transmission has attracted a significant amount of interest in digital-centric systems or centralized networks because it greatly simplifies the front-end hardware by using digital processing. The sigma-delta modulator (SDM)-based all-digital RoF approach pushes the digital signal processing as far as possible into the transmit chain. We present a real-time 100-GS/s fourth-order single-bit SDM for all-digital RoF transmission in the high-frequency band without the aid of analog/optical up-conversion. This is the fastest sigma-delta modulator reported and this is also the first real-time demonstration of sigma-delta-modulated RoF in the frequency band above 24 GHz. 4.68 Gb/s (2.34 Gb/s) 64-QAM is transported over 10-km standard single-mode fiber in the C-band with 6.46 $\text{}\%$ (4.73 $\%$ ) error vector magnitude and 3.13 Gb/s 256-QAM can be even received in an optical back-to-back configuration. The carrier frequency can be digitally tuned at run-time, covering a wide frequency range from 22.75 to 27.5 GHz. Besides, this high-speed sigma-delta modulator introduces less than 1 μs latency in the transmit chain. Its all-digital nature enables network virtualization, making the transmitter compatible with different existing standards. The prominent performance corroborates the strong competitiveness of this SDM-based RoF approach in high-frequency RoF 5G communication.
32 citations
08 Mar 2020
TL;DR: GMI-based end-to-end learning is shown to be highly nonconvex and state-of-the-art constellations in 2D and 4D are found providing reach increases up to 26% w.r.t. to QAM.
Abstract: GMI-based end-to-end learning is shown to be highly nonconvex. We apply gradient descent initialized with Gray-labeled APSK constellations directly to the constellation coordinates. State-of-the-art constellations in 2D and 4D are found providing reach increases up to 26% w.r.t. to QAM.
08 Mar 2020
TL;DR: First successful real-time self-homodyne coherent bi-direction transmission demonstration with 600-Gb/s DP-64QAM under un-cooled ∼7-MHz linewidth DFB laser and a novel coherent receiver is proposed to achieve automatic stabilization against polarization fluctuations of received LO.
Abstract: We report first successful real-time self-homodyne coherent bi-direction transmission demonstration with 600-Gb/s DP-64QAM under un-cooled ∼7-MHz linewidth DFB laser. A novel coherent receiver is proposed to achieve automatic stabilization against polarization fluctuations of received LO.
08 Mar 2020
TL;DR: A hybrid machine learning (HML) model combining a-priori and a-posteriori knowledge is implemented and tested, which is shown to reduce the prediction error and training complexity, compared to an analytical or neural network learning model.
Abstract: A hybrid machine learning (HML) model combining a-priori and a-posteriori knowledge is implemented and tested, which is shown to reduce the prediction error and training complexity, compared to an analytical or neural network learning model.
08 Mar 2020
TL;DR: This work experimentally demonstrates simultaneous localization of optical excess loss points and spans with different dispersion in multi-span fiber links using a neural-network based digital backpropagation.
Abstract: We experimentally demonstrate simultaneous localization of optical excess loss points and spans with different dispersion in multi-span fiber links using a neural-network based digital backpropagation.
08 Mar 2020
TL;DR: In this article, short-length probabilistic shaping was used to reduce nonlinear interference in optical fiber transmission and showed that the shaping gain vanishes when interleaving is employed and not undone before transmission.
Abstract: We show that short-length probabilistic shaping reduces nonlinear interference in optical fiber transmission. SNR improvements of up to 0.8 dB are obtained. The shaping gain vanishes when interleaving is employed and not undone before transmission.
08 Mar 2020
TL;DR: This work demonstrates 596.4 Tb/s over a standard cladding diameter fiber with 4 single-mode cores, using a single wideband optical comb source to provide 25 GHz spaced carriers over 120 nm range across S, C and L bands.
Abstract: We investigate high-throughput, multi-band transmission in a 4-core multi-core fiber (MCF) with the same 125 μm cladding diameter of standard single-mode fiber (SMF). A single wideband comb source is used to transmit up to 561 wavelength channels with 25 GHz spacing over a 120 nm bandwidth in S, C, and L bands. We demonstrate a maximum decoded throughput of 610 Tb/s in PDM-256QAM and PDM-64QAM signals over a 54 km fiber, transmitting more than 155 Tb/s in a single core and measuring a per-core average throughput exceeding record transmission demonstrations in SMF. In addition, we use noise loading measurements to characterize the achievable signal quality across the wideband transmitter. These results show that a single comb source can enable high-spectral efficiency modulation over wide bandwidths and further that low-core count homogeneous MCF technology can offer the same transmission performance as single-mode fibers without sacrificing mechanical reliability, and still offering the benefits of shared resources and greater efficiency that drives SDM technologies.
08 Mar 2020
TL;DR: Coupled-core multi-core fiber transmission is demonstrated across 359 C- and L-band channels with low spatial-mode-dispersion, doubling the record data-rate-distance-product for standard cladding diameter SDM fibers.
Abstract: Coupled-core multi-core fiber transmission is demonstrated across 359 C- and L-band channels with low spatial-mode-dispersion. A net-data-rate of 172 Tb/s over 2040 km is achieved, doubling the record data-rate-distance-product for standard cladding diameter SDM fibers.
08 Mar 2020
TL;DR: A distributed multi-user multiple-input multiple-output (MU-MIMO) architecture is used, enabling seamless mobility, reliable low-latency communications, and integration with positioning and 5G.
Abstract: We propose a new system concept for LiFi in industrial wireless applications. A distributed multi-user multiple-input multiple-output (MU-MIMO) architecture is used, enabling seamless mobility, reliable low-latency communications, and integration with positioning and 5G.
08 Mar 2020
TL;DR: A novel rate-flexible single-wavelength 100G time-and-frequency-division multiplexing coherent PON architecture based on digital subcarrier multiplexed technology is proposed, achieving −38-dB sensitivity after 50-km fiber transmission.
Abstract: We propose a novel rate-flexible single-wavelength 100G time-and-frequency-division multiplexing coherent PON architecture based on digital subcarrier multiplexing technology. The architecture implementation with four subcarriers is demonstrated, achieving −38-dB sensitivity after 50-km fiber transmission.
08 Mar 2020
TL;DR: This work experimentally demonstrated single-lane 200G+ IM/DD PAM-V system at O-band using SOA and probabilistic shaping (PS) for high-speed short reach optical interconnects.
Abstract: We experimentally demonstrated single-lane 200G+ IM/DD PAM-V system at O-band using SOA and probabilistic shaping (PS) for high-speed short reach optical interconnects. 280 Gb/s PS-PAM-8 signals can transmit over 10 km SSMF.
IBM1
TL;DR: A fully-packaged digitally programmable 8×8 strictly nonblocking electrooptic silicon photonics switch module that measures fiber-to-fiber loss between 7.5 and 10.5 dB, crosstalk −30 dB, and reconfiguration time < 10 ns is demonstrated.
Abstract: We demonstrate a fully-packaged digitally programmable 8×8 strictly nonblocking electrooptic silicon photonics switch module. We measured fiber-to-fiber loss between 7.5 and 10.5 dB, crosstalk < −30 dB, and reconfiguration time < 10 ns.
08 Mar 2020
TL;DR: It is shown that at optimal power, C+L OLS doubles the traffic of C-only with very-low penalty with respect to fiber doubling.
Abstract: We investigate on the network capacity enabled by C+L optical line systems (OLS) vs. fiber doubling showing that at optimal power, C+L OLS doubles the traffic of C-only with very-low penalty with respect to fiber doubling.
08 Mar 2020
TL;DR: A 1.6Tbps coherent transceiver delivering 800Gbps/wave transmission using integrated Tx/Rx functions with 50GHz bandwidth and 50kHz linewidth tunable lasers on a single 2-channel InP PIC paired with a SiGe Driver and TIA ASIC is presented.
Abstract: We present a 1.6Tbps coherent transceiver delivering 800Gbps/wave transmission using integrated Tx/Rx functions with 50GHz bandwidth and 50kHz linewidth tunable lasers on a single 2-channel InP PIC, paired with a SiGe Driver and TIA ASIC.
08 Mar 2020
TL;DR: An O-band SiP MZM design enabling net transmission of 212.5 Gbit/s over 2 (10) km using PAM-8 modulation and 20% SD-FEC, and net 200 G Bit/s back-to-back using Pam-6 and 6.7% HD-Fec is presented.
Abstract: We present an O-band SiP MZM design enabling net transmission of 212.5 (200) Gbit/s over 2 (10) km using PAM-8 modulation and 20% SD-FEC, and net 200 Gbit/s back-to-back using PAM-6 and 6.7% HD-FEC.
08 Mar 2020
TL;DR: This work demonstrates the real-time transmission of a 34-GBd PDM-QPSK signal over two fiber-optic links interconnected by a THz wireless fiber extender at 300 GHz carrier frequency, with joint impairment compensation by a single-carrier DSP.
Abstract: We demonstrate the real-time transmission of a 34-GBd PDM-QPSK signal over two fiber-optic links interconnected by a THz wireless fiber extender at 300 GHz carrier frequency, with joint impairment compensation by a single-carrier DSP.
08 Mar 2020
TL;DR: A dual-stage 150nm discrete Raman amplifier with 15dB gain and maximum ∼8dB noise figure enabling SCL-band (1475-1625nm) WDM transmission through a 70km SMF using 30GBaud PM-QPSK signals with low transmission penalties is experimentally demonstrated.
Abstract: We experimentally demonstrate a dual-stage 150nm discrete Raman amplifier with 15dB gain and maximum ∼8dB noise figure enabling SCL-band (1475-1625nm) WDM transmission through a 70km SMF using 30GBaud PM-QPSK signals with low transmission penalties.
08 Mar 2020
TL;DR: In this paper, an experimental end-to-end transceiver optimization via deep learning using a generative adversarial network to approximate the test-bed channel was performed, which was only possible through a prior assumption of an explicit simplified channel model.
Abstract: We perform an experimental end-to-end transceiver optimization via deep learning using a generative adversarial network to approximate the test-bed channel. Previously, optimization was only possible through a prior assumption of an explicit simplified channel model.
08 Mar 2020
TL;DR: End-to-end learning for amplified and unamplified links including binary-mapping is proposed to improve the performance of optical coherent systems.
Abstract: End-to-end learning for amplified and unamplified links including binary-mapping is proposed to improve the performance of optical coherent systems. 1.0dB and 1.2dB gains are demonstrated on coherent 92GbaudDP-32QAM 800Gb/s and 82GbaudDP-128QAM 1Tb/s measurements, respectively.
08 Mar 2020
TL;DR: This work demonstrates real-time 2.4Tbps bidirectional coherent DWDM-PON (12λ×200Gbps/λ) over 100km SMF, enabled by multiplexing Nyquist subcarriers and shows the advantage of coherent subcarrier aggregation in next-generation point-to-multipoint bid Directional access networks.
Abstract: We demonstrate real-time 2.4Tbps bidirectional coherent DWDM-PON (12λ×200Gbps/λ) over 100km SMF, enabled by multiplexing Nyquist subcarriers. Further, through proof-of-concept experiments, we show the advantage of coherent subcarrier aggregation in next-generation point-to-multipoint bidirectional access networks.
08 Mar 2020
TL;DR: A reinforcement learning based DU-CU placement scheme to accommodate diversified services in 5G/B5G networks outperforms ILP model and widely used heuristics in terms of the service-scale and resource-saving respectively.
Abstract: We propose a reinforcement learning based DU-CU placement scheme to accommodate diversified services in 5G/B5G networks. It outperforms ILP model and widely used heuristics in terms of the service-scale and resource-saving respectively.