Small-form-factor Gaussian-modulated coherent-state transmitter for CV-QKD using a gain-switched DFB laser

被引：8

作者：

Aldama, J. ^{[1
]}

Sarmiento, S. ^{[1
]}

Etcheverry, S. ^{[1
]}

Valivarthi, R. ^{[1
]}

Grande, I. H. Lopez ^{[1
]}

Vidarte, L. Trigo ^{[1
]}

Runeri, V. P. ^{[1
,2
]}

机构：

[1] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Barcelona 08860, Spain

[2] ICREA Inst Catalana Recerca & Estudis Avancats, Barcelona 08010, Spain

来源：

OPTICS EXPRESS | 2023年 / 31卷 / 04期

基金：

欧盟地平线“2020”;

关键词：

QUANTUM KEY DISTRIBUTION; RANDOM NUMBER GENERATION;

D O I：

10.1364/OE.474665

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a directly modulated distributed feedback laser operating in gain-switching mode for preparing the coherent states required for the Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CV-QKD) protocol. The proposed single-component quantum transmitter design eliminates the need for external modulators, decreasing the complexity of GMCS CV-QKD systems. The experimental results demonstrate a potential asymptotic secret key rate value of 2.63 Mbps over an 11-km fiber link, making the directly modulated GMCS transmitter particularly suitable for metropolitan optical networks where compactness, robustness, and low cost are key desirable features.

引用

页码：5414 / 5425

页数：12

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