GHz near infrared single-photon detector avalanche signal extraction system
A single-photon detector and signal extraction technology, applied in the field of optical signal detection, can solve the problems of increasing system circuit redundancy and low avalanche signal amplitude, and achieve the effect of reducing PCB area and reducing redundancy
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[0012] The present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
[0013] Such as figure 2 As shown, a GHz near-infrared single photon detector avalanche signal extraction system includes an avalanche diode 100, a gate pulse signal generator 200 and a bias voltage unit 300, and the gate pulse signal generator 200 is loaded on the avalanche diode through a capacitor C1 The cathode of 100, the bias voltage unit 300 is loaded on the cathode of the avalanche diode 100 through the resistor R1, the anode of the avalanche diode 100 is respectively connected to the ground of the resistor R2 and the differential amplifier 400, the two output terminals of the differential amplifier 400, Output two signals with equal magnitude and opposite phases, one of which is directly input to the beam combiner 500 without delay, and the other signal is input to the beam combiner 500 after a period of...
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