Quantum random number generator for chip structure homodyne detection

• Main Authors: XIA YUEFENG, XIA CONGJUN, LI ZAIGUANG
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a quantum random number generator for chip structure homodyne detection. The quantum random number generator is characterized in that a light source (1), a polarization controller (2), an input waveguide (3), a multimode interference device (4), an output waveguide (5), a photodiode (6), a trans-impedance amplifier (7), a multiplier (8), a low-pass filter (9), an analog-to-digital converter (10) and an extractor (11) are integrated on a chip; the light source (1) emits the continuous laser, the continuous laser is multiplied by a sinusoidal signal through the multiplier(8) and then is filtered through the low-pass filter (9) to obtain a signal of a required frequency band, the signal is converted through the analog-digital converter (10) to obtain a digital signal,and the digital signal is extracted through the extractor (11) to obtain a final random number QRN and output the final random number QRN. The input waveguide, the output waveguide, the multimode interference device and the p