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Dual-mode intelligent response laser protection structure and optical detector with the structure

An optical detector and laser protection technology, applied in optics, optical components, instruments, etc., can solve the problem of inability to defend against super-strong lasers, and achieve continuous and effective protection, wide protection spectrum, and high stability.

Active Publication Date: 2020-01-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing laser protection structure cannot defend against ultra-strong lasers (exceeding the damage threshold of general protective materials), the purpose of the present invention is to provide a corresponding protective measure for lasers of different intensities, so as to realize protection against all intensities of lasers. Defensive laser protection structure, and optical detector with the laser protection structure

Method used

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  • Dual-mode intelligent response laser protection structure and optical detector with the structure
  • Dual-mode intelligent response laser protection structure and optical detector with the structure
  • Dual-mode intelligent response laser protection structure and optical detector with the structure

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Using sapphire as the substrate, the thickness is 0.5mm, polished on both sides, the surface roughness is below 4nm, and the surface is ultrasonically treated in acetone and ethanol for about 10 minutes before coating, and then the surface is blown dry with nitrogen.

[0062] On the treated substrate, use the magnetron sputtering method to grow the vanadium dioxide thin film layer with low phase change threshold. The specific parameters are: the pre-vacuum degree of the sputtering chamber is -4 Pa, control the flow rate of argon and oxygen at 100sccm and 50sccm respectively, (total flow rate 150sccm), substrate temperature is 500°C, sputtering temperature is 500°C, sputtering pressure is 1.5Pa, sputtering time is 25min, sputtering power is 200W, the target used for sputtering is vanadium trioxide. The prepared low phase transition threshold vanadium dioxide film layer is a layer of pure vanadium dioxide component, brown in color, epitaxial growth along the substrate orie...

Embodiment 2

[0070] The difference with Example 1 is:

[0071] The anti-reflection layer is further grown in the low phase transition threshold vanadium dioxide thin film layer of embodiment 1, and its material is WO 3 , the magnetron sputtering parameters are: the mixed gas of argon and oxygen is passed into the sputtering deposition chamber, the total gas pressure is controlled at 1.5Pa, the oxygen partial pressure ratio is about 40%, and the intermediate frequency power supply is used, and the power supply current is controlled At 5A, the power is preferably 2.0kw, and high-purity tungsten is used as the sputtering target for sputtering deposition, and the deposition time is 5 minutes. The prepared anti-reflection layer has a thickness of 50nm;

[0072] Further growth anti-reflection layer at the phase change threshold vanadium dioxide thin film layer of embodiment 1, its material is WO 3 , the magnetron sputtering parameters are: the mixed gas of argon and oxygen is passed into the s...

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Abstract

The invention relates to a dual-mode intelligent response laser protection structure and an optical detector with the same. The dual-mode intelligent response laser protection structure comprises a first vanadium dioxide film, a second vanadium dioxide film and a controllable laser shielding valve which are sequentially arranged from the side face of a laser protection object to the laser incidentside, wherein the phase change threshold value of the second vanadium dioxide film is higher than the phase change threshold value of the first vanadium dioxide film and is not higher than the damagethreshold value of the first vanadium dioxide film; the second vanadium dioxide thin film is used as a photoelectric switch to be connected into a control circuit, and when the second vanadium dioxide thin film is changed into a metal state, the control circuit is switched on to send a starting signal to drive the controllable laser shielding valve to shield a laser light path.

Description

technical field [0001] The invention relates to a photoelectric switch, a phase change material, and a laser protection technology of nonlinear optics, in particular to a metal-semiconductor phase change material with dual-mode intelligent response optical detector laser protection structure and device. Background technique [0002] With the development of modern laser technology, the threat of laser to the photoelectric detection system of aircraft, satellite and other equipment is increasing. Laser light may cause damage and even blindness to human eyes and photoelectric detection systems. High-precision photoelectric detection equipment is generally at 10uJ / cm 2 The left and right lasers will be blinded, and once the photoelectric detection equipment is blinded, it will not work normally on the equipped aircraft and satellites. In order to meet the needs of the normal operation of the photoelectric detection system in the strong laser countermeasure environment in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/14
Inventor 金平实曹逊杨阳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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