A laser source driver in 0.18 <i>μ</i>m SiGe BiCMOS technology for high speed quantum key distribution-Reference-Cited by-同舟云学术

A laser source driver in 0.18 μm SiGe BiCMOS technology for high speed quantum key distribution

Published:2022-12-01 Issue:12 Volume:12 Page:125025
ISSN:2158-3226
Container-title:AIP Advances
language:en
Short-container-title:AIP Advances

Author:

Zhu Yulong¹²^ORCID,Wang Xinzhe³⁴^ORCID,Zhu Chenxi⁵^ORCID,Chen Zhaoyuan³⁴⁶^ORCID,Huang Zhisheng²^ORCID,Jin Zhanhong²^ORCID,Li Yang³⁴^ORCID,Liang Futian³⁴^ORCID,Liao Shengkai³⁴⁵^ORCID,Peng Chengzhi³⁴^ORCID,Jin Ge¹²

Affiliation:

1. State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China

2. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

3. Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China

4. CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

5. School of Cyberspace Security, University of Science and Technology of China, Hefei 230026, China

6. PLA Rocket Force University of Engineering, Xi’an 710025, China

Abstract

Quantum key distribution (QKD) has rapidly developed recently. The repetition frequency of the QKD system increases from tens or hundreds of MHz to GHz. A laser diode (LD) operating in gain-switched mode is widely used as a weak coherent light source in a QKD system. We present an LD driver circuit fabricated in 0.18 μm SiGe heterojunction bipolar transistor bipolar complementary metal oxide semiconductor technology. The circuit can operate at frequencies up to 2.5 GHz, satisfying the requirements of high-speed laser drives in practical QKD systems. The output current of the driver circuit can reach 100 mA when driving an LD whose input equivalent resistance is ∼21 Ω. The extinction ratio of the 1550-nm distributed feedback LD light source driven by our driver circuit reaches 23 dB at the operating frequency of 2.5 GHz, meeting the requirements of QKD systems. This circuit will be used in miniaturized QKD systems.

Funder

National Natural Science Foundation of China

Shanghai Municipal Science and Technology Major Project

Anhui Initiative in Quantum Information Technologies

Publisher

AIP Publishing

Subject

General Physics and Astronomy

Link

https://aip.scitation.org/doi/pdf/10.1063/5.0118778

Reference31 articles.

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