Acta Optica Sinica, Volume. 38, Issue 2, 0227001(2018)
Fast Response Balanced Homodyne Detector for Continuous-Variable Quantum Memory
The balanced homodyne detector for continuous-variable quantum memory is improved, and a fast response balanced homodyne detector for real-time measurement of amplitude and phase quadrature components of short pulsed optical signals is obtained. By using the circuits without capacitors and the photodiodes with a high quantum efficiency and a low capacitance, the response time of 65 ns for this balanced homodyne detector is obtained. The signal-to-noise ratio is higher than 12 dB at 2.5 MHz when a laser with a power of more than 100 μW and a wavelength of 795 nm is incident, and the corresponding saturation power is 6.8 mW. This balanced homodyne detector can be applied in the continuous-variable quantum memory and the quantum network, and so on.
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Lixia Ma, Jiliang Qin, Zhihui Yan, Xiaojun Jia. Fast Response Balanced Homodyne Detector for Continuous-Variable Quantum Memory[J]. Acta Optica Sinica, 2018, 38(2): 0227001
Category: Quantum Optics
Received: Aug. 21, 2017
Accepted: --
Published Online: Aug. 30, 2018
The Author Email: Yan Zhihui (zhyan@sxu.edu.cn)