106 Gbit/s PAM4 Transmission Employing a 15 GHz Directly Modulated Laser

Chen, Yaobin; Wang, You; Li, Wei; Mei, Muyang; Feng, Zhongshuai; Wu, Chengcheng; Sun, Lei; Zhu, Hongtu; Zhao, Xiaobo

doi:10.1364/acpc.2021.t4a.101

Cited by 3 publications

(2 citation statements)

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“…It's a effective way to reduce bandwidth limitation effect by using advanced signal modulation format. Due to its simple structure and low energy consumption, pulse amplitude modulation (PAM) has attracted wide attention [4][5] . The main harmful effect of bandwidth restriction is waveform distortion caused by inter-symbol interference (ISI).…”

Section: Introductionmentioning

confidence: 99%

Demonstration of 112Gb/s PAM4/6 signal transmission in IM/DD systems using MLSE

Xie,

Li,

et al. 2023

AOPC 2023: AI in Optics and Photonics

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Section: Introductionmentioning

confidence: 99%

Demonstration of 112Gb/s PAM4/6 signal transmission in IM/DD systems using MLSE

Xie,

Li,

et al. 2023

AOPC 2023: AI in Optics and Photonics

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“…For the current technology, the corresponding high-order nonlinear processing technology has been widely studied for the nonlinear factors in the direct modulation and direct detection. In this regard, the Volterra nonlinear filter has attracted many researchers' interest because of its good nonlinear recovery ability [14][15][16][17][18][19][20]. The Volterra nonlinear filter has strong recovery capability, but its complexity is also very high, so it cannot be applied in cost-sensitive direct modulation direct detection short-range applications [21].…”

Section: Introductionmentioning

confidence: 99%

A Simplified Volterra Equalizer Based on System Characteristics for Direct Modulation Laser (DML)-Based Intensity Modulation and Direct Detection (IM/DD) Transmission Systems

Feng,

Li,

et al. 2023

Photonics

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The nonlinear Volterra equalizer has been proved to be able to solve the problem of nonlinear distortion, but it has high computational complexity and is difficult to implement. In this paper, a simplified second-order Volterra nonlinear equalizer designed for intensity modulation/direct detection systems based on direct modulated laser is proposed and demonstrated, taking into account the characteristics of the system. It has been proved that the received signal of direct modulation laser/direct detection system can be expressed in Volterra series form, but its form is too complex, and the device parameters should also be considered. We re-derived it and obtained a more concise form. At the same time, we proposed a method to simplify the second-order Volterra nonlinear equalizer without relying on device parameters. The performance of the proposed Volterra nonlinear equalizer is evaluated experimentally on a 56 Gb/s 4-ary pulse amplitude modulation link implemented by using a 1.55 µm direct modulation laser. The results show that, compared with the traditional Volterra nonlinear equalizer, the receiver sensitivity of the equalizer is only reduced by 0.2 dB at most, but the complexity can be reduced by 50%; compared with diagonally pruned Volterra nonlinear equalizers, the complexity of the equalizer is the same, but the reception sensitivity can be improved by 0.5 dB.

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Demonstration of 112Gb/s PAM-4/6 Transmission Using Low-Complexity Volterra-DFE

Sun

et al. 2022

2022 Asia Communications and Photonics Conference (ACP)

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106 Gbit/s PAM4 Transmission Employing a 15 GHz Directly Modulated Laser

Abstract: A 106 Gbit/s PAM4 transmission is experimentally demonstrated based on a DML. Received power of -3 dBm with 7% overhead HD-FEC is achieved by employing a digital pre-compensation and nonlinear equalization.

Cited by 3 publications

References 2 publications

Demonstration of 112Gb/s PAM4/6 signal transmission in IM/DD systems using MLSE

Demonstration of 112Gb/s PAM4/6 signal transmission in IM/DD systems using MLSE

A Simplified Volterra Equalizer Based on System Characteristics for Direct Modulation Laser (DML)-Based Intensity Modulation and Direct Detection (IM/DD) Transmission Systems

Demonstration of 112Gb/s PAM-4/6 Transmission Using Low-Complexity Volterra-DFE

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