- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Error correction for short-range optical interconnect using COTS transceivers
摘要： Nowadays, quantities of commercial off-the-shelf (COTS) optical transceivers are widely equipped in both exiting and abuilding data centers. As data centers are becoming larger and containing more servers, the method to ensure longer and steady transmission with COTS optical transceivers becomes one of the key issues. Meanwhile, variations in the manufacturing of COTS optical transceivers bring in fluctuation of packet error rate (PER) in communication. In this paper, we present an application layer adaptive forward error correction (AL-AFEC) coding scheme for COTS optical transceivers in optical interconnect to solve the problems mentioned above and test its performance in a 10 Gbps Ethernet (10GbE) link using 10GBASE-SR SFP+ modules. Experimental results show that the proposed scheme enables longer transmission distance and the instability introduced by manufactural variations is well settled. Since our scheme requires no extra hardware on optical transceivers, it is a considerable low-cost alternative to improve system reliability and achieve longer transmission distance for COTS optical transceivers.
关键词： short-range optical interconnect,ethernet,vertical cavity surface emitting laser (VCSEL),application layer adaptive forward error correction,commercial off-the-shelf optical transceiver
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE CPMT Symposium Japan (ICSJ) - Kyoto, Japan (2018.11.19-2018.11.21)] 2018 IEEE CPMT Symposium Japan (ICSJ) - A 53-Gbit/s VCSEL-Based High Density Optical Assembly for Large Capacity Optical Interconnection
摘要： A 53-Gbit/s VCSEL-based compact optical module is proposed. In order to realize 50-Gbit/s-class optical transmission, high-bandwidth optical devices are important. Accordingly, the feasibilities of a high speed optical circuit applying high-bandwidth (> 20 GHz) optical devices were studied by simulation. Moreover, an optical module at the receiver (Rx) side was fabricated on the basis of simulation results by applying our developed high density optical assembly techniques, and it successfully demonstrated 53.125-Gbit/s PAM4 multimode optical transmission.
关键词： compact optical module,High-density optical assembly,Optical interconnect,4-level pulse amplitude modulation (PAM4)
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE Photonics Conference (IPC) - Reston, VA (2018.9.30-2018.10.4)] 2018 IEEE Photonics Conference (IPC) - 3-Gbps Free Space Optical Link Based on Integrated Indium Phosphide Transmitter
摘要： A free space optical link was demonstrated with an integrated indium phosphide transmitter, tunable from 1521 nm to 1565 nm. Error-free operation was achieved at 3 Gbps for an equivalent link length of 180 m (up to 300 m with forward error correction).
关键词： sampled grating DBR laser,photonic integrated circuits,optical interconnect,Free space communication
更新于2025-09-23 15:22:29
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Low-Voltage, Coupled Multiple Quantum Well Electroreflective Modulators towards Ultralow Power Inter-Chip Optical Interconnects
摘要： An electroreflective modulator based on multiple-pass electroabsorption (EA) of coupled multiple quantum wells (CMQWs) is demonstrated for integration with low-loss polymer optical waveguides towards inter-chip and on-board optical interconnects at 850 nm. Taking advantage of coupling between quantum states in MQWs, the top polymer cladding and the bottom Au mirror form a Fabry-Pérot cavity to further enhance the EA of CMQWs, thereby greatly improving the extinction ratio (ER) at a low voltage. The device achieves an ER of ~6 dB and an insertion loss (IL) <3 dB at 2 V, notably outperforming conventional surface-incident EA modulators at the same driving voltage. A further optimized modulator design can achieve a peak ER of 9-12 dB at 2V with a low IL of 2-3 dB and a relatively broad spectral bandwidth of ~10 nm. The low capacitance and reverse bias operation at a low voltage potentially offer ~10× lower power consumption compared to direct modulation of 850 nm lasers. This simple surface-incident CMQW modulator is a promising candidate for integration with ultralow power inter-chip and on-board interconnect architectures.
关键词： Modulator,Coupled Multiple Quantum Wells,Optical Interconnect,Fabry-Perot cavity,Electroabsorption
更新于2025-09-23 15:21:01
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[IEEE 2018 IEEE Symposium on VLSI Technology - Honolulu, HI, USA (2018.6.18-2018.6.22)] 2018 IEEE Symposium on VLSI Technology - Hybrid 14nm FinFET - Silicon Photonics Technology for Low-Power Tb/s/mm <sup>2</sup> Optical I/O
摘要： We demonstrate a microbump flip-chip integrated 14nm-FinFET CMOS-Silicon Photonics (SiPh) technology platform enabling ultra-low power Optical I/O transceivers with 1.6Tb/s/mm2 bandwidth density. The transmitter combines a differential FinFET driver with a Si ring modulator, enabling 40Gb/s NRZ optical modulation at 154fJ/bit dynamic power consumption in a 0.015mm2 footprint. The receiver combines a FinFET trans-impedance amplifier (TIA) with a Ge photodiode, enabling 40Gb/s NRZ photodetection with -10.3dBm sensitivity at 75fJ/bit power consumption, in a 0.01mm2 footprint. High-quality data transmission and reception is demonstrated in a loop-back experiment at 1330nm wavelength over standard single mode fiber (SMF) link margin. Finally, a 4x40Gb/s, 0.1mm2 with 2dB wavelength-division multiplexing (WDM) transmitter with integrated thermal control is demonstrated, enabling Optical I/O scaling substantially beyond 100Gb/s per fiber.
关键词： optical interconnect,FinFET,silicon photonics
更新于2025-09-23 15:21:01
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A long-range plasmonic optical waveguide corner mirror chip
摘要： We provide the experimental proof of concept of on-chip 90° corner waveguide arrays based on ultra-long-range surface plasmon polariton waveguides working in TM-polarization at 1.55 μm. The single-mode waveguides comprise a thin gold-photoresist core embedded into SU-8 claddings and show typical propagation loss of ~1 dB/mm. A prismatic cavity integrated into the cladding layers and aligned with the waveguide’s corner assures the total internal reflection. We present a fabrication method to integrate the waveguide corner mirror based on self-alignment of multiple lithography steps. This chip has potential as low-loss perpendicular interface for single-mode high speed communication interconnects.
关键词： Planar lightwave circuits,Plasmon,Optical interconnect,Integrated Waveguide,Plasmonic
更新于2025-09-23 15:19:57
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[Communications in Computer and Information Science] VLSI Design and Test Volume 892 (22nd International Symposium, VDAT 2018, Madurai, India, June 28-30, 2018, Revised Selected Papers) || Performance Analysis of Graphene Based Optical Interconnect at Nanoscale Technology
摘要： In the modern technology era, interconnect is the key element for designing integrated circuits that provides on-chip and off-chip communication path for various systems. The primary challenges for modeling interconnect are reduced propagation delay, power dissipation, and its power delay product at advanced technology. This paper critically addresses the performance of optical interconnects using equivalent electrical model that comprises of different composite materials. Using industry standard HSPICE, the propagation delay and power dissipation characteristics of graphene nanoribbon have been compared with other composite materials. It has been observed that the propagation delay for graphene nanoribbon can be improved by 99.91% as compared to other composite materials. The power delay product of the proposed graphene based interconnect model is 59.73% lesser compared to other composite materials at 22 nm technology node.
关键词： Power delay product (PDP),Graphene nanoribbons,Propagation delay,Optical interconnect,Power dissipation
更新于2025-09-19 17:15:36
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Compact silicon multicast switch for pCDC ROADM based on thermooptic Mach-Zehnder interferometers
摘要： We propose an optimized multicast switch for colorless, directionless and partially contentionless ROADM and experimentally demonstrate a 2×8 silicon multicast switch, which consists of six 3-dB multimode interference splitters and four Mach-Zehnder 2×2 optical switches.
关键词： Optical interconnect,multicast,silicon photonics,optical switches,CDC ROADM
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Five-port non-blocking silicon optical router based on mode-selective property
摘要： We propose and demonstrate a five-port optical router based on mode-selective property. It utilizes modes as labels to distinguish its routing paths. The optical signal-to-noise ratios for all paths are larger than 16.3 dB.
关键词： Optical interconnect,Silicon photonics,mode-division multiplexing,optical switching
更新于2025-09-16 10:30:52
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Electro-Optical Co-Design of Power-Efficient 100-Gbps/λ VCSEL Transmitter
摘要： In this paper, we propose a comprehensive electro-optical co-design framework for power-efficient high-speed VCSEL transmitter targeting at 50 Gbaud. The framework integrates a rate-equation based VCSEL chip model and driver circuit models. Subject to the transmitter specifications defined by IEEE 400G standard, the driver circuit design of NRZ and PAM-4 modulations, together with the energy efficiency of transmitter, is analyzed and compared for two types of 20-GHz class VCSELs with different damping factors while keeping the same parasitic parameters. For NRZ modulation, analysis results indicate that both types of VCSEL transmitters show similar achievable data rate and energy efficiency. Both types of VCSEL transmitters are beneficial with small driver resistance in order to achieve high-speed signaling integrity. The best energy efficiency for both types of VCSEL transmitters is 520.8 fJ/bit under NRZ modulation. For PAM-4 modulation, higher achievable data rate can be reached by the over-damped VCSEL transmitter compared with the under-damped one, for which trade-offs of choosing the appropriate driver parameters are required for high-speed operation. The optimized over-damped VCSEL transmitter can have 16.13% higher achievable data rate and around 4.12% of energy efficiency improvement compared with the under-damped counterpart, but the signal quality is more sensitive to driver parameters. The best energy efficiencies are 365.1 fJ/bit and 380.8 fJ/bit for the over- and under-damped VCSEL transmitter under PAM-4 modulation. This co-design framework can provide a guidance in the VCSEL enabled co-packaging design.
关键词： energy efficiency,optical interconnect,VCSEL transmitter,co-package,co-design
更新于2025-09-16 10:30:52