Avalanche photodiode detection array applicable to ultra high-speed quantum secure communication system
A quantum secure communication and avalanche photoelectric technology, applied in the field of detection arrays, can solve the problems of APD not meeting the demand, the coding rate of the communication system not improving, limiting the coding rate of quantum secure communication, etc.
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[0018] figure 1 It is a schematic structural diagram of an avalanche photodiode detection array suitable for an ultra-high-speed quantum secure communication system in this embodiment.
[0019] Such as figure 1 As shown, an avalanche photodiode detection array 100 suitable for an ultra-high-speed quantum secure communication system has a first circulator 10 , a first Sagnac interference (Sagnac) ring 20 and a spectroscopic detection unit 30 . in,
[0020] The first circulator 10 has an input optical path 11 and two output optical paths 12a, 12b, and the input optical path 11 and the external signal light are welded together at 45°.
[0021] The first Sagnac interference (Sagnac) ring 20 is composed of a first polarization beam splitter 21 , a first phase modulator 22 and a first Faraday rotator 23 connected clockwise through an optical path (such as an optical fiber).
[0022] The first polarization beam splitter 21 has three optical paths, the common end is connected to an...
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