A low-noise, high-SNR and large-dynamic-range balanced homodyne detector for broadband squeezed light measurement

Jinrong Wang; Shuange Wu; Liying Hou; Chengdong Mi; Xurong Shi; Xuzhen Gao

Results in Physics (Feb 2024)

A low-noise, high-SNR and large-dynamic-range balanced homodyne detector for broadband squeezed light measurement

Jinrong Wang,
Shuange Wu,
Liying Hou,
Chengdong Mi,
Xurong Shi,
Xuzhen Gao

Affiliations

Jinrong Wang: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China; Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong 510640, China; Corresponding author at: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China.
Shuange Wu: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China
Liying Hou: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China
Chengdong Mi: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China
Xurong Shi: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China
Xuzhen Gao: Department of Physics and Electronic Information Engineering, Lyuliang University, Lishi, Shanxi 033001, China

Journal volume & issue: Vol. 57
p. 107356

Abstract

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Squeezing-based quantum metrology has been extensively applied in the field of precision measurement. Performance characteristics of squeezed light are obtained by a balanced homodyne detector. Here, we report a large dynamic range balanced homodyne detector with low-noise and high-signal-to-noise-ratio (SNR) for broadband squeezed light measurement. We perform a comprehensive theoretical analysis of the SNR in a wide bandwidth and experimentally analyze the important printed circuit board (PCB) layout and electronic components. Consequently, in the 100 MHz frequency band, the SNR and common mode rejection ratio (CMRR) rise over 12.6 dB and 55 dB, respectively, and the electronic noise is suppressed below −90 dB. The directly observed squeezing level at 1550 nm with the specified detector is 11.8 dB at 2 MHz and 3.1 dB at 100 MHz.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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