CN112992650A - Structure for improving pumping light transmission efficiency of integrated liquid-cooled xenon lamp - Google Patents

Abstract

The utility model provides a promote structure of integral type liquid cooling xenon lamp pumping light transmission efficiency, includes coolant liquid, baffle glass and gain medium, its characterized in that still includes a plurality of reflection strips that are triangular prism shape, and the figure N of reflection strip is M +1, and wherein M is xenon lamp figure, the reflection strip is isosceles triangle's triangular prism about for the bottom surface, the distance 1mm of reflection strip and baffle glass is less than or equal to d1 and is less than or equal to 10mm, reflection strip and xenon lamp tube outer wall normal distance 1mm is less than or equal to d2 and is less than or equal to 5 mm. According to the invention, the triangular prism-shaped reflection strip soaked in the cooling liquid is adopted to compress the xenon lamp light transmission divergence angle, so that the efficiency of the xenon lamp pumping light penetrating through the partition plate glass is improved, the utilization rate of the integrated liquid cooling xenon lamp pumping light is greatly improved, the energy supply is reduced, and the transmission efficiency of light from the xenon lamp to the surface of the gain medium is improved.

Description

Structure for improving pumping light transmission efficiency of integrated liquid-cooled xenon lamp

Technical Field

The invention relates to a liquid-cooled xenon lamp, in particular to a structure for improving the pumping light transmission efficiency of an integrated liquid-cooled xenon lamp in a repetition frequency amplifier.

Background

The xenon lamp is widely used for a pumping source of a laser amplifier, in particular to a sheet laser amplifier due to the advantages of wide emission spectrum line width, high cost performance and the like. However, because the gain medium has narrow absorption lines, most of the pump light is dissipated in the form of heat, and the repetition frequency operation of the chip amplifier is severely limited. In order to realize the repetitive frequency output of the sheet amplifier, particularly the large-caliber (the diameter is more than or equal to 100mm) sheet amplifier, the xenon lamp generally adopts an independent liquid cooling structure, specifically, a water sleeve is independently added outside each xenon lamp, and cooling liquid flows in a gap between the water sleeve and the tube wall of the xenon lamp for cooling. On the basis of keeping the xenon lamp to be independently disassembled, in order to reduce the sealing installation requirement and simplify the structure, the inventor previously invented an integrated xenon lamp liquid cooling structure (patent No. CN201811323474.4), but because the pumping light sequentially passes through the cooling liquid (refractive index n1), the partition glass (refractive index n2) and the air (refractive index n3) to enter the gain medium, and n3 < n1 < n2, part of the pumping light is reflected after reaching the surface of the partition glass and cannot pass through the partition glass to enter the air side, and finally the pumping light transmission efficiency is low.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a structure for improving the pumping light transmission efficiency of an integrated liquid-cooled xenon lamp, and the solution of the invention is as follows:

a structure for improving the pumping light transmission efficiency of an integrated liquid-cooled xenon lamp comprises cooling liquid, partition plate glass and a gain medium, and is characterized by further comprising a plurality of reflecting strips in a triangular prism shape, wherein the number N of the reflecting strips is equal to M +1, and M is the number of xenon lamps;

each reflection strip is soaked in cooling liquid and axially distributed along the center of each xenon lamp, the upper bottom surface and the lower bottom surface of each reflection strip are isosceles triangles, the bottom edges of the isosceles triangles on the upper bottom surface are collinear, and the bottom edges of the isosceles triangles on the lower bottom surface are collinear.

Each reflecting strip can be independently arranged on the flat reflector or can be integrally processed with the flat reflector.

Compared with the prior art, the invention has the advantages that:

by adding the reflection strips on two sides of the integrated liquid-cooled xenon lamp, the divergence angle of the pump light of the xenon lamp is compressed, the incidence angle of the pump light passing through the partition plate glass is reduced, the transmission efficiency of the pump light of the xenon lamp is greatly improved, and energy is saved.

Drawings

Fig. 1 is a schematic view of a structure for improving the pumping light transmission efficiency of the integrated liquid-cooled xenon lamp according to the present invention, wherein a is a schematic view of the structure, and b is a partially enlarged view of a.

1-flat reflector, 2-reflection strip, 3-xenon lamp, 4-cooling liquid, 5-gain medium and 6-partition glass.

Fig. 2 is a performance test light path diagram of the present embodiment.

Detailed Description

The present invention will be described in more detail by way of examples, but the scope of the present invention is not limited to the examples.

Examples

Referring to fig. 1, fig. 1 is a schematic structural diagram of a method for improving pumping light transmission efficiency of an integrated liquid-cooled xenon lamp, as shown in the figure, a structure for improving pumping light transmission efficiency of an integrated liquid-cooled xenon lamp includes a plurality ofreflection bars 2, where the number N of thereflection bars 2 is 16 (where the number M of the xenon lamps is 15, and the center distance is 15mm), the upper bottom surface and the lower bottom surface of eachreflection bar 2 are isosceles triangles with a bottom edge length of 6mm and a center height of 16mm, the total length is 200mm, the reflection bars are immersed in a cooling liquid 4, the distance d1 between thereflection bars 2 and apartition glass 6 is 1mm, the normal distance d2 between thereflection bars 2 and the outer wall of axenon lamp 3 lamp tube is 1mm, the outer surface of thereflection bars 2 is plated with a high reflection film (silver + silica protective film), the reflectivity of the high reflection film at a waveband of 400 + 1100nm is between 85% and 95%, thereflection bars 2 are fixedly mounted, the bottom edges of the isosceles triangles on the upper bottom surface are collinear, and the bottom edges of the isosceles triangles on the lower bottom surface are collinear.

Thegain medium 5 is made of neodymium glass, ray tracing display is carried out by adopting TracePro software, the transmission efficiency of pump light which starts from thexenon lamp 3 and passes through the distilled water 4 and thepartition plate glass 6 to reach the gain medium 5 (the neodymium glass) is relatively improved by 17.3 percent compared with the transmission efficiency when the reflectingstrip 2 is not used (only the reflector 1), and the efficiency improvement amplitude is obvious. Meanwhile, a small signal test is carried out on the gain capability of the repetition frequency chip amplifier of the pumping transmission structure by adopting thegraph 2, and a test result shows that under certain xenon lamp pumping energy, after thereflection strip 2 is used, the gain coefficient of the small signal is improved to 4.6/m from the original 4.1/m (only the flat reflector 1), and the amplification is obvious.

Claims (4)

1. A structure for improving the pumping light transmission efficiency of an integrated liquid-cooled xenon lamp comprises cooling liquid, partition plate glass and a gain medium, and is characterized by further comprising a plurality of reflecting strips in a triangular prism shape, wherein the number N of the reflecting strips is equal to M +1, and M is the number of xenon lamps;

each reflection strip is soaked in cooling liquid and axially distributed along the center of each xenon lamp, the upper bottom surface and the lower bottom surface of each reflection strip are isosceles triangles, the bottom edges of the isosceles triangles on the upper bottom surface are collinear, and the bottom edges of the isosceles triangles on the lower bottom surface are collinear.

2. The structure for improving the transmission efficiency of the pump light of the integrated liquid-cooled xenon lamp according to claim 1, wherein the distance between the reflecting strip and the partition glass is 1mm or more and d1 or more and 10mm or less.

3. The structure for improving the transmission efficiency of the pump light of the integrated liquid-cooled xenon lamp according to claim 1, wherein the normal distance between the reflection strip and the outer wall of the xenon lamp tube is 1mm or more and d2 or more and 5mm or less.

4. The structure for improving the pumping light transmission efficiency of the integrated liquid-cooled xenon lamp according to claim 1, wherein the outer surfaces of the reflection strips are plated with reflection films, the reflectivity is greater than or equal to 85%, and the wavelength band is 400nm-1100 nm.

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