摘要
改进了连续变量量子存储的平衡零拍探测器,得到了一种可以实时测量短脉冲光信号正交分量的快速响应平衡零拍探测器。利用无电容电路,以及高量子效率、低结电容的光电二极管,获得的平衡零拍探测器的响应时间为65ns;当波长为795nm、功率大于100μW的激光入射时,在2.5 MHz处的信噪比超过12dB,相应的饱和功率为6.8mW。该平衡零拍探测器可以应用于连续变量量子存储、量子网络等研究领域中。
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 100μW 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.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第2期349-353,共5页
Acta Optica Sinica
基金
国家重点研发计划(2016YFA0301402)
国家自然科学基金(61775127
11474190
11654002)
山西青年三晋学者项目
山西省回国留学人员科研资助项目(2016-007)
关键词
量子光学
平衡零拍探测器
正交分量
短脉冲光信号
响应时间
信噪比
quantum optics
balanced homodyne detector
quadrature components
short pulsed optical signal
response time
signal-to-noise ratio
