Chaos laser range-measurement method and device based on semiconductor laser

Abstract

A method of using chaos laser to measure distance based on semiconductor laser includes modulating output character of semiconductor laser to make it emit chaos laser signal then splitting chaos laser signal to be reference light and detection light, using detection light to illuminate object to be measured carrying out correlative comparison of scattered back chaos detection light with chaos reference light, applying cross correlation manner to measure round - trip time of chaos detection light. The device for realizing said method is also disclosed.

Description

technical field [0001] The invention belongs to the field of laser ranging methods and devices, in particular to a method and device for realizing laser ranging by using semiconductor lasers to generate chaotic laser signals, which can be applied to many fields such as industrial and agricultural production, military affairs, communication, and remote sensing. Background technique [0002] Laser ranging is a method of distance measurement using laser signals. In the existing mid-range and long-distance laser ranging systems, according to the extraction methods of distance information, there are mainly three methods: time measurement, phase measurement and frequency measurement. [0003] The prior art [1] (see Raimo Ahola, Risto Myllyla, A new method forming the time-of-flight in fast laser range finding, [J].Proc.SPIEvol.654, 1986) is a time-of-flight method using light pulses Methods. The pulse laser emits a laser pulse signal with a short duration, which is reflected bac...

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Problems solved by technology

[0008] The problem to be solved by the present invention is to use the chaotic laser signal to replace the ranging signal used in the prior art, and to overcome the deficiency of complex circuit design in the prior art in order to improve the measurement accuracy

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