Modulator driving method and system suitable for quantum state random optical signal

• Main Authors: DAI YUNQI, PAN JIANHAI, SHENG YINGJIE
• Format: Patent
• Language: Chinese; English
• Published: 31.12.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention provides a modulator driving method and system suitable for a quantum state random optical signal, and the system comprises: a current source group which comprises at least two current sources respectively used for outputting an adjustable current signal; a power supply connected with the input end of each current source and used for supplying power to each current source; a currentswitch group which is connected with the output end of each current source, receives a switch control signal and controls the output of each current source according to the switch control signal to form a driving signal; and a modulator which is connected with the current switch group, receives the driving signal and modulates the quantum state random optical signal input into the modulator according to the driving signal. According to the invention, 0 Hz (i.e., direct current)-10 GHz broadband driving can be satisfied, the problem of substrate jitter of the existing driving circuit is effectively solved, the signal q