Laser system with controllable pulse state and control method thereof

By adjusting the cavity length and gas pressure within the FP cavity and controlling the power of the pump source, a controllable pulsed laser system is generated, solving the problems of low signal-to-noise ratio and high bit error rate in existing laser communication, and realizing reliable and secure laser communication with high signal-to-noise ratio and low bit error rate.

CN122073503AActive Publication Date: 2026-05-22LASER RES INST OF SHANDONG ACAD OF SCI
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Patent Information

Application Number
CN202610516438.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-20
Publication Date
2026-05-22
Estimated Expiration
2046-04-20

AI Technical Summary

Technical Problem

Existing laser communication methods suffer from low signal-to-noise ratio and high bit error rate during signal transmission, which affects communication reliability. Existing physical layer security schemes tend to simultaneously raise the bit error rate threshold of legitimate receivers, reducing signal reliability and security.

Method used

By adjusting the cavity length and gas pressure within the FP cavity, the power of the pump source is controlled, generating a controllable pulsed laser system. Abnormal wave morphology is used as a physical layer disturbance, and the laser is switched controllably by combining it with an FPGA microcontroller. The system outputs abnormal waves and dissipative soliton molecules in a predetermined frame structure, thereby improving the reliability and security of signal transmission.

Benefits of technology

It improves the reliability and security of signal transmission without affecting data segment transmission, reduces the performance requirements of the licensed receiver, stably outputs multi-soliton molecules, has a high signal-to-noise ratio and distinguishability, and reduces the bit error rate.

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Abstract

The invention relates to the technical field of laser, and provides a laser system with a controllable pulse state and a control method thereof. The control method of the laser system with the controllable pulse state comprises the steps that under the conditions that the cavity length of an FP cavity is in an initial fit state and the air pressure in the FP cavity is standard air pressure, a pump light source is controlled to adjust the pump power according to a first set; in response to the fact that the target pulse interval is smaller than the initial pulse interval, the pump light source is controlled to keep the target power unchanged, the air pressure of the FP cavity is adjusted to be within the preset range, and the cavity length of the FP cavity is adjusted through a second set; determining a target cavity length; controlling the laser to be output in a first pulse state; and controlling the laser to output in a second pulse state. According to the control method, the controllably generated abnormal wave form with the high peak power is introduced according to the preset frame structure to serve as a physical layer disturbance or random segment, and the reliability and safety of system signal transmission are improved under the condition that data segment transmission is not affected.
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