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

A technology of chaotic laser and ranging method, which is applied in the direction of measuring devices, instruments, electromagnetic wave re-radiation, etc., can solve problems such as complex circuit design, achieve the effect of no mechanical adjustment requirements, simple structure, and save external modulators and power supplies

Inactive Publication Date: 2006-09-13
TAIYUAN UNIV OF TECH
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  • Application Information

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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 t

Method used

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

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0020] In this embodiment of the method, the external optical feedback effect of the semiconductor laser 1 can be used to modulate the output characteristics of the semiconductor laser 1 to generate a chaotic laser signal. The output light is fed back to the semiconductor laser 1 by an external optical feedback element, and the semiconductor laser 1 emits a high-dimensional chaotic laser signal by adjusting the intensity of the feedback light. The chaotic laser signal generated by the semiconductor laser 1 is divided into two beams, one beam is used as a reference beam, and the other beam is used as a probe beam. light for comparison. By comparing the cross-correlation functions of the two beams of light, the round-trip flight time τ of the chaotic probe light in free space is measured, and the distance of the target 10 to be measured can be obtained using t...

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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...

Claims

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Application Information

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IPC IPC(8): G01S17/08
Inventor 王云才王冰洁王安帮
Owner TAIYUAN UNIV OF TECH
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