新型光接收系统架构：应用于超大容量低成本的短距光互连

doi:10.11959/j.issn.1000-0801.2022159

Abstract

Abstract:

The deployment of emerging network infrastructure such as hyper-scale datacenters urgently requires ultra-high capacity but low-cost short-reach optical interconnects.Conventional intensity modulation and direct detection possesses a simple receiver structure but can only recover the intensity information, which restrains the capability of further scaling up the system capacity.Standard coherent detection can deliver high-order modulation formats and achieve high-capacity transmission.Nevertheless, the coherent transceiver requiring expensive narrow-linewidth laser sources and computation-intensive digital signal processing precludes its wide applications in short-reach systems.The advanced direct-detection optical receivers aim to combine the advantages of both direct detection and coherent detection and bridge the gap between them.Therefore, the advanced optical receivers are mainly based on self-coherent detection.Advanced single-polarization, dual-polarization, and few-mode optical receiver architectures wereintroduced.The proposed advanced optical receivers can retrieve the optical field via direct detection without using the narrow-linewidth lasers, which enables the realization of ultra-high capability but low-cost short-reach optical interconnects.

Key words: short-reach optical interconnects, direct detection, self-coherent detection, self-coherent homodyne detection, mode-division multiplexing transmission

CLC Number:

TP393

Honglin JI, Xueyang LI, Zhixue HE, Weisheng HU, Shieh William. Advanced optical receiver architectures for ultra-high capacity but low-cost short-reach optical interconnects[J]. Telecommunications Science, 2022, 38(7): 43-56.

Figures/Tables 7

References 45

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