Quantum-enhanced optical phase-insensitive heterodyne detection beyond 3-dB noise penalty of image band

被引：0

作者：

Anai, Keitaro ^{[1
]}

Enomoto, Yutaro ^{[1
]}

Omura, Hiroto ^{[1
]}

Nagano, Koji ^{[2
]}

Izumi, Kiwamu ^{[2
]}

Endo, Mamoru ^{[1
]}

Takeda, Shuntaro ^{[1
]}

机构：

[1] Univ Tokyo, Sch Engn, Dept Appl Phys, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1138656, Japan

[2] Inst Space & Astronaut Sci JAXA, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan

来源：

OPTICS EXPRESS | 2024年 / 32卷 / 11期

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

SQUEEZED VACUUM; AMPLITUDE; HOMODYNE; STATES;

D O I：

10.1364/OE.498691

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical phase-insensitive heterodyne (beat-note) detection, which measures the relative phase of two beams at different frequencies through their interference, is a key sensing technology for various spatial/temporal measurements, such as frequency measurements in optical frequency combs. However, its sensitivity is limited not only by shot noise from the signal frequency band but also by the extra shot noise from an image band, known as the 3-dB noise penalty. Here, we propose a method to remove shot noise from all these bands using squeezed light. We also demonstrate beyond-3-dB noise reduction experimentally, confirming that our method actually reduces shot noise from both the signal and extra bands simultaneously. Our work should boost the sensitivity of various spatial/temporal measurements beyond the current limitations.

引用

页码：19372 / 19387

页数：16