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Chaos laser range-meaurement device and method of LD pumping solid laser

A technology of solid-state lasers and chaotic lasers, which is used in military, remote sensing, industrial and agricultural production, and communication fields. It can solve the problems of measurement uncertainty, short measurement distance, and measurement accuracy dependent on pulse width, and achieve a wide range of measurement distance and noise tolerance. The effect of large degree and strong anti-interference ability

Inactive Publication Date: 2009-04-15
TAIYUAN UNIV OF TECH
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Problems solved by technology

In order to solve the short measurement distance of geometric ranging in the prior art, the measurement accuracy of direct pulse ranging depends on the pulse width, the measurement uncertainty of using phase information ranging and the existence of using frequency information ranging must be high. The problem with the modulation source of the repetition rate

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  • Chaos laser range-meaurement device and method of LD pumping solid laser

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Embodiment Construction

[0016] The present invention LD pumps the device of chaotic laser ranging of solid-state laser, comprises solid-state laser, laser collimation system, beam splitter, target to be measured, telescope, photoelectric detector I, A / D converter I, photoelectric detector II, A / D converter II, adjustable electric delay line and computer, wherein said solid-state laser is pumped YAG, YVO by semiconductor laser (2) 4 or YLF laser crystal (3), and generate broadband chaotic laser by means of external light feedback, self-injection or modulation. The following is combined with the accompanying drawings to modulate the Nd pumped by the LD 3+ :YVO 4 The solid-state laser produces chaotic laser and carries out ranging as an example, and the present invention is further described:

[0017] The chaotic laser signal generating device of the present invention is composed of a laser current pulse drive power supply 1 , a semiconductor laser 2 and a microchip laser crystal 3 . The laser curren...

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Abstract

A chaos laser distance measurement device of LD pumping solid laser is prepared as forming said laser by semiconductor laser pumping laser crystal to generate wideband chaos laser, utilizing laser collimation system and beam splitter to divide chaos laser to be detection light being use as distance measurement signal and being illuminated on object to be measured as well as to be reference light being illuminated on detector then being inputted to computer, carrying out cross correlative comparison on two said lights by computer for measuring out round - trip flight time of detection light so as to calculate out distance to be measured.

Description

technical field [0001] The invention belongs to the field of laser ranging devices and methods thereof, in particular to a device and method for realizing laser ranging by using a solid laser pumped by a semiconductor laser to generate chaotic laser signals, which can be applied to industrial and agricultural production, military affairs, communications, and remote sensing and other fields. Background technique [0002] As an information carrier with extremely high monochromaticity, collimation and coherence, laser has become the preferred tool for distance measurement. There are basically two methods of using laser ranging: laser geometric ranging and laser time-of-flight ranging. [0003] The laser geometric ranging method uses PSD (Position Sensitive Device) or CCD to detect the spot position of the laser, and then calculates the distance to be measured according to the geometric relationship. It has good accuracy in very short distance measurement, but as the measureme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/08
Inventor 王云才王安帮王金定王冰洁
Owner TAIYUAN UNIV OF TECH
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