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High extinction ratio pulsed laser control system and its control method in quantum communication

A technology of pulsed laser and quantum communication, which is applied in the high extinction ratio pulsed laser control system and its control field, and can solve problems such as low extinction ratio, high cost, and complicated schemes

Active Publication Date: 2020-03-20
上海循态量子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the low extinction ratio of current pulsed lasers and the complex and high-cost defects of some externally modulated pulsed lasers, the present invention provides a high extinction ratio pulsed laser control system in quantum communication and its control method

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  • High extinction ratio pulsed laser control system and its control method in quantum communication
  • High extinction ratio pulsed laser control system and its control method in quantum communication

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] Such as figure 1 As shown, the high extinction ratio pulsed laser control system in the quantum communication of the present invention includes:

[0033] The synchronous clock source module generates a square wave modulation signal with an adjustable duty cycle. The clock is debounced by the debounce module to improve the quality of the clock output, and then two channels with the same frequency and the same duty cycle are generated by the clock distribution module. , the pulse clock signa...

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Abstract

The invention provides a high extinction ratio pulse laser control system in quantum communication and a control method thereof. The system comprises a synchronous clock source part, a delay and amplifier circuit part and a feedback voltage-stabilizing circuit part, wherein the synchronous clock source part produces a square wave modulation signal with adjustable duty ratio, and a synchronous signal with duty ratio of 50%, wherein the square wave modulation signal with adjustable duty ratio is used for the direct modulation of a laser device, and the synchronous signal is used for the externalmodulation of an electro-optical intensity modulator module. The system provided by the invention can provide a pulse laser source with the high extinction ratio meeting the continuous variable quantum communication, and is economic and reliable, simple and easy.

Description

technical field [0001] The invention relates to a high extinction ratio pulse laser control system and a control method thereof, in particular to a high extinction ratio pulse laser control system in quantum communication and a control method thereof. Background technique [0002] With the rapid development of computer information technology and the increasing severity of password deciphering methods and multi-way virus intrusion, the requirements of information technology for information security are increasing day by day. In recent years, due to the characteristics of the uncertainty principle and unclonability of quantum physics, the use of quantum for key distribution has attracted extensive attention from researchers. [0003] Quantum key distribution technology mainly includes discrete variable quantum key distribution and continuous variable quantum key distribution. The research on discrete variable quantum key distribution started earlier and is more mature. Conti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/50H04B10/524H04B10/54H04B10/70
Inventor 汪超黄鹏曾贵华
Owner 上海循态量子科技有限公司