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Detection of 13.8 dB squeezed vacuum states by optimizing the interference eciency and gain of balanced homodyne detection

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摘要

Squeezed states belong to the most prominent nonclassical resources. They have compelling applications in precise measurement, quantum computation and detection. Here, we report on the direct measurement of 13.8 dB squeezed vacuum states by improving the interference eciency and gain of balanced homodyne detection. By employing an auxiliary laser beam, the homodyne visibility is increased to 99.8%. The equivalent loss of the electronic noise is reduced to 0.05% by integrating a junction eld-eect transistor (JFET) buering input and another JFET bootstrap structure in the balanced homodyne detector.

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作者单位:

    Shanxi University

引用该论文

Sun Xiaocong,Wang Yajun,Tian Long,Zheng Yaohui,Peng Kunchi. Detection of 13.8 dB squeezed vacuum states by optimizing the interference eciency and gain of balanced homodyne detection[J].Chinese Optics Letters,2019,17(7):07.