Device and method of generating high-speed picosecond narrow pulse laser

Abstract

The invention discloses a device of generating high-speed picosecond narrow pulse laser. A control module is electrically connected with a signal driving module, a constant current compensation module and a temperature control module respectively; the signal driving module, the constant current compensation module and the temperature control module are electrically connected with a laser tube; the control module converts an input triggering signal into a radio frequency driving signal by the signal driving module, and outputs the radio frequency driving signal to the laser tube to drive a laser device to work at a constant temperature to output laser; the control module controls the working temperature of the laser tube by the temperature control module to allow the laser device to work at a constant temperature; and the control module controls the magnitude of compensation current by the constant current compensation module to allow the laser device to output at constant current. The invention further discloses a method of generating the high-speed picosecond narrow pulse laser. The device is stable in output, can be suitable for a quantum key distribution system with quantum light and synchronous light multiplexing an optical fiber, and has the characteristics of concision, convenience and low cost.

Description

[0001] technical field [0002] The invention relates to a pulse generating device and method for generating quantum light and synchronous light in the field of quantum encryption communication, in particular to a device and method for generating high-speed picosecond narrow pulse laser. Background technique [0003] At present, picosecond lasers below 1 GHz are relatively mature, and there are already commercial products in the world. The operating frequency of the 10ps order pulse laser of Germany Advanced Laser Diode is 10MHz; the operating frequency of the 20ps laser of Japan HAMAMATSU is 100MHz; the operating frequency of the Swiss IDQ pulse laser is 500MHz. The operating frequency of the device can reach 1GHz, the minimum pulse width can reach the order of 50ps, and the performance is far superior to existing products. [0004] The quantum key distribution system is based on the unclonability and uncertainty of quantum, which makes the quantum key distribution system ...

AI Technical Summary

Problems solved by technology

Single-photon sources are usually used as quantum light, but the real single-photon source technology is very difficult, and currently only weakly coherent light can be used to replace single-photon sources

The disadvantage of weakly coherent light is that it is more complicated to realize, and the high-speed picosecond-level narrow-pulse laser is attenuated to the single-photon level, and quantum operations can be performed to realize quantum communication.

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