56 Gbit/s/λ PAM-4 IM/DD Transmission over 120 km SSMF at O-band Using Cascaded Semiconductor Optical Amplifiers for Data Center Interconnects

Zhang, Jiao; Zhou, Wen; Xiao, Jiangnan; Yu, Jianjun; Zhu, Min; Lei, Mingzheng; Cai, Yuancheng; Zou, Yucong; Zhou, Qingyi; Xu, Wei; Wang, Jikuan

doi:10.1364/acpc.2020.t3b.2

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…The research on optical code division multiple access communication started relatively late in China, at present, it focuses on the research of high-speed data transmission in O-band. In 2020, Southeast University and Fudan University jointly published a feasibility study on the transmission of 56 Gbit/s/λ PAM-4(four-stage pulse amplitude modulation) intensity modulated/direct detection (IM/DD) signals in 120 km standard single-mode fiber (SSMF) using a series semiconductor optical amplifier (SOA) in O-band [15] ,the solution can provide data rates up to 56 Gbit/s/λ, meet the 400G Ethernet standard, suitable for high-speed interconnection between large-scale data centers [15] .In 2021, Sun Yat-sen University studied the implementation of low-cost 100Gb/s/λ PAM-4(four-stage pulse amplitude modulation) signal transmission in a 40km interconnected data center using a 4bit resolution digital to analog converter (DAC) in O-band, the scheme simplifies the complexity of the traditional PAM-4 system and greatly reduces the cost [16] .At present, in the optical code division multiple access communication security, stability and reliability, the current results are still scarce, need to be further in-depth and systematic research.…”

Section: Technology Trend 21 Comparative Analysis Of Techniquesmentioning

confidence: 99%

Brief analysis on the development of physical security technology in optical network

DU,

Li,

Wang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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Optical network has the characteristics of high speed, large capacity, long distance, and no electromagnetic interference. It is widely used in global information network. More than 90% of the world's information is transmitted through optical network, and has become an important strategic infrastructure of modern information society. Optical network physical layer security is one of the important indicators of optical network communication quality. It represents the ability of the optical network physical layer information to resist human interception and attacks. This paper summarizes the development of physical layer security technology of optical network, including physical layer security system of optical network, optical information protection and optical layer firewall, analyzes the development trend of the technology, and puts forward some suggestions on the development of physical layer security technology of optical network from the perspective of long-term development strategy and recent development focus.

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Section: Technology Trend 21 Comparative Analysis Of Techniquesmentioning

confidence: 99%

Brief analysis on the development of physical security technology in optical network

DU,

Li,

Wang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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“…This is the first study to verify the feasibility of cascaded SOAs based on PAM-4 signals. 5 Xiaodan Pang et al demonstrate 200 Gbps short-reach transmissions with PAM-4 and DMT signals, which shows the system requirements in terms of device characteristics and DSP performance. They 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.…”

Section: Introductionmentioning

confidence: 99%

An investigation on digital signal processing in pulse amplitude modulation transmission system

Liu

2022

Third International Conference on Computer Communication and Network Security (CCNS 2022)

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With the development of the global Internet industry, the demand for the transmission capacity of communication system is increasing rapidly. Optical fiber has become the main transmission media in communication systems because of its unique advantages, such as large bandwidth and low loss. It is necessary to construct large capacity optical communication systems to satisfy the capacity requirements. In this paper, the overall architecture for optical short-reach pulse amplitude modulation (PAM) transmission system is analysed. Then the signal damage factors and corresponding compensation schemes based on digital signal processing (DSP) are studied. The different implementation schemes for clock recovery and channel equalization are described and compared in detail. Finally, the challenges and prospects of DSP technology in short-reach PAM transmission system are discussed.

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“…There are many varieties of OAs used in O-band. Firstly, a semiconductor optical amplifier (SOA) based photonic integrated circuits provides a variety of wavelength ranges with very wide 3-dB amplification bandwidth of 30-80 nm [6], [23], [24]. SOAs require less power consumption than other OAs but they suffer from signal-dependent effects.…”

Section: Introductionmentioning

confidence: 99%

Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

Maneekut,

Elson,

Wakayama

et al. 2024

IEEE Access

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This paper explores, through the utilization of analytical models and simulations, the bit error rate (BER) of 400GBASE-LR8/ER8 in back-to-back configuration, considering various extinction ratio (ER) values and photodetector types. Simulation of transmission over fiber is carried out to measure chromatic dispersion (CD) penalty in each scenario. To increase the distance, we simulated a multi-span transmission with inline optical amplifiers (OAs). We mitigated the effects of CD-induced power fading by employing equalization such that the channel under test (CUT) at 1274 nm could reach 7×30 km. The effects of fiber nonlinearity were also investigated for both single-channel and 3 wavelength division multiplexing (WDM) at various channel spacings. Moreover, the relationship between ER and peak-to-average-power ratio (PAPR) at different distances was investigated. An ER optimization for a highly accumulated CD multi-span fiber link with amplification was effective in improving the BER. Finally, we successfully transmitted a 26.56 GBaud 4-level pulse amplitude modulation (PAM-4) signal up to 8×30 km with the optimal ER of 5 dB.

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56 Gbit/s/λ PAM-4 IM/DD Transmission over 120 km SSMF at O-band Using Cascaded Semiconductor Optical Amplifiers for Data Center Interconnects

Abstract: We experimentally demonstrated the first 56 Gbit/s/λ PAM-4 IM/DD system transmission over 120 km SSMF at O-band assisted by cascaded SOAs with the bandwidth-limited optics and simple DSP for high-speed DCI in metro-access networks.

Cited by 5 publications

References 7 publications

Brief analysis on the development of physical security technology in optical network

Brief analysis on the development of physical security technology in optical network

An investigation on digital signal processing in pulse amplitude modulation transmission system

Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

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