CN217740972U - Heating structure of He-Ne laser - Google Patents
Heating structure of He-Ne laser Download PDFInfo
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- CN217740972U CN217740972U CN202222108104.7U CN202222108104U CN217740972U CN 217740972 U CN217740972 U CN 217740972U CN 202222108104 U CN202222108104 U CN 202222108104U CN 217740972 U CN217740972 U CN 217740972U
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Abstract
The utility model discloses a He-Ne laser heating structure, including the zone of heating, the zone of heating is arranged in laser pipe outside, sets up the heat-conducting layer outside the zone of heating, and the heat-conducting layer outside sets up the insulating layer. The utility model discloses a He-Ne laser heating structure has not only improved the thermal uniformity of laser pipe, has still improved the anti environmental interference's of laser pipe ability, makes the frequency stabilization performance of laser instrument obtain promoting.
Description
Technical Field
The utility model relates to a He-Ne laser instrument heating structure belongs to laser instrument technical field.
Background
The frequency stability of the He-Ne laser is one of key performance indexes of ultra-precise measurement, the laser heterodyne interferometry system usually measures physical quantities such as length, displacement and the like by taking the wavelength of the double-frequency He-Ne laser as a measurement standard, and the frequency stability of the laser directly influences the measurement precision.
Commonly used frequency stabilization methods for a dual-frequency He-Ne laser include lamb dip frequency stabilization, saturated absorption frequency stabilization, zeeman effect frequency stabilization and dual longitudinal mode frequency stabilization, and most of the frequency stabilization methods realize frequency stabilization by accurately controlling the length of a resonant cavity of the laser so as to stabilize the frequency of a laser tube. The double longitudinal mode frequency stabilized laser has a simple structure, is easy to realize a control strategy, and has high frequency stability, so that the double longitudinal mode frequency stabilized laser is widely applied. The double longitudinal mode frequency stabilized laser generally adopts thermal control to realize the frequency stabilization of the laser, namely a resistance wire is tightly wound on a laser tube resonant cavity of the laser, and the cavity temperature of the laser tube is adjusted by controlling the heat productivity of the resistance wire, thereby achieving the purpose of frequency stabilization control.
At present, most of common double longitudinal mode frequency-stabilized lasers in the market are self-radiating lasers, the working temperature of the lasers is usually 60-70 ℃, and the frequency stability of the lasers is 10 -8 Magnitude. For a self-radiating laser, if the laser cannot be heated and radiated sufficiently, the temperature point when the emitting frequency of the laser reaches stability is greatly influenced by the temperature of the laser tube and the ambient temperature, resulting in different temperature points reaching the frequency stabilization each time. Meanwhile, the laser adopting thermal frequency stabilization is easily influenced by external environmental factor changes, so that the frequency stability and reproducibility of the laser are poor.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: there is provided a heating structure of He-Ne laser to solve the above-mentioned problems in the prior art.
The utility model discloses the technical scheme who takes does: a heating structure of a He-Ne laser comprises a heating layer, wherein the heating layer is arranged outside a laser tube, a heat conduction layer is arranged outside the heating layer, and a heat insulation layer is arranged outside the heat conduction layer.
Preferably, the heating layer is formed by uniformly winding a resistance wire on the outer cylindrical surface of the laser tube cavity.
Preferably, the heat conductive layer is formed of a heat conductive paste covering the heating layer.
Preferably, the heat insulation layer is made of a heat insulation material.
The utility model has the advantages that: compared with the prior art, the utility model discloses a He-Ne laser instrument heating structure has not only improved the hot homogeneity of laser pipe, has still improved the anti environmental interference's of laser pipe ability, makes the frequency stabilization performance of laser instrument obtain promoting.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic sectional view of the present invention.
In the figure, the laser tube 1, the laser tube 2, the heating layer 3, the heat conduction layer 4, the heat insulation layer 5, the cathode and anode 6, the discharge tube 7 and the resonant cavity are arranged.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1-2, a He-Ne laser heating structure comprises a heating layer 2, the heating layer 2 is arranged outside a laser tube 1, a heat conduction layer 3 is arranged outside the heating layer 2, the heating layer needs to be isolated in order to ensure heat transfer stability, a heat insulation layer 4 is arranged outside the heat conduction layer 3, the heat insulation layer 4 is made of a heat insulation material, and the heat insulation layer 4 made of a heat insulation material can reduce heat loss and ensure temperature conduction stability of the heating layer. The internal structural parameters of the laser tube comprise a cathode and an anode 5, a discharge tube 6 and a resonant cavity 7.
The heating layer 2 is formed by uniformly winding resistance wires on the outer cylindrical surface of the laser tube cavity.
In order to improve the heating uniformity of the laser tube, the heat conducting layer 3 is formed by heat conducting glue covering the heating layer 2, the resistance wire is wrapped by the heat conducting glue to reduce the gap, heat generated by the resistance wire is uniformly applied to the laser tube, and the laser tube is heated more uniformly.
Zone of heating 2, heat-conducting layer 3 and insulating layer 4 are mainly through heat-conduction, outwards transmit the heat that heat and resistance wire produced of laser pipe 1 self in proper order, and carry out heat exchange through thermal convection between insulating layer 4 and the external environment, adopt the insulating layer after, can reduce heat exchange.
To illustrate the heating structure effect of the present invention, the following simulation was performed:
in this embodiment, as shown in fig. 2, the thermal structure of the laser tube is imported by using a Geometry unit in ANSYS, and the imported structure is processed by a software optimization algorithm and then is input into Icepak. The laser tube thermal structure material parameters are set in the Icepak, quartz glass used by the laser tube, a tungsten rod used by the anode, aluminum used by the cathode, nickel-chromium alloy used by the resistance wire, TX-FHC30 mixed silicon rubber used by the heat conduction layer and 150CA30Peek heat insulation materials used by the heat insulation layer are respectively used, after the material parameters of each part are set, the power consumption of the laser tube heating structure model can be set, and the actual heating and heat dissipation conditions of the laser tube can be accurately simulated.
The method comprises the steps of establishing different laser tube heating structure models in Solidworks2019 by taking the thickness of a heat insulation layer of a laser tube heating structure model, the heat conductivity coefficient of a heat insulation layer material and the layout mode of resistance wires as variables, guiding the laser tube heating structure models into Icepak, carrying out thermal simulation analysis on the different models by utilizing the Icepak, and recording corresponding laser tube temperature data. And optimally designing the heating structure of the laser tube by adopting orthogonal design according to the temperature data of the laser tube until the temperature distribution of the laser tube can meet the design requirement.
The temperature monitoring point data for the laser tube placed in air without any control is shown in table 1.
TABLE 1 laser tube temperature monitoring point data sheet in natural state
Resistance wires, heat conducting layers and heat insulating layers are added outside the laser tube, orthogonal optimization design is carried out through Icepak, and the obtained data of the temperature monitoring points of the laser tube are shown in the table 2.
TABLE 2 optimized data sheet of laser tube temperature monitoring points
As can be seen from the temperature data before and after the optimization of the laser tube heating structure, the maximum temperature of the laser tube before the optimization is 58.32 ℃, the maximum temperature difference of the temperature monitoring points is 7.5 ℃, while the maximum temperature of the laser tube after the optimization is increased to 59.42 ℃ due to the addition of a new heat source, and the maximum temperature difference of the temperature monitoring points is only 0.49 ℃. The temperature distribution difference of the laser tube is obviously reduced after the optimization design, the temperature distribution difference is less than 1 ℃, the optimization effect is good, and the design requirement can be met.
The research of the He-Ne laser for realizing frequency stabilization by adopting thermal control provides a simple and clear laser tube heating structure, and the heating structure of the laser tube is optimized on the basis of analyzing the larger temperature distribution difference of a laser tube cavity of the thermal frequency stabilization laser, so that the thermal uniformity of the laser tube cavity is improved, and the frequency of emergent light of the laser is more stable.
The utility model discloses a He-Ne laser instrument heating structure carries out the quadrature analysis to each factor that influences the laser tube thermal stability, has obtained the optimal parameter of each part of laser tube heating structure, has not only improved the thermal uniformity of laser tube, has still improved the anti environmental disturbance's of laser tube ability, makes the frequency stabilization performance of laser instrument obtain promoting.
The utility model discloses a He-Ne laser instrument heating structure after optimizing has improved the temperature distribution condition of laser pipe, has improved the thermal uniformity of laser pipe, makes the axial temperature distribution fluctuation of laser pipe reduce to about 0.5 ℃, has reduced the long change of laser tube chamber to improve laser frequency's stability. Tests show that the short-term frequency stability of the designed double longitudinal mode thermal frequency stabilization He-Ne laser is 1.47 multiplied by 10 -9 H, long-term frequency stability of 7.4X 10 -9 /24h。
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (4)
1. A He-Ne laser heating structure comprising a heating layer (2), the heating layer (2) being arranged outside a laser tube (1), characterized in that: a heat conduction layer (3) is arranged outside the heating layer (2), and a heat insulation layer (4) is arranged outside the heat conduction layer (3).
2. A He-Ne laser heating structure according to claim 1, wherein: the heating layer (2) is formed by uniformly winding a resistance wire on the outer cylindrical surface of the laser tube cavity.
3. A He-Ne laser heating structure according to claim 1 or 2, characterized in that: the heat conduction layer (3) is formed by heat conduction glue covered on the heating layer (2).
4. A He-Ne laser heating structure according to claim 1 or 2, characterized in that: the heat insulation layer (4) is made of heat insulation materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222108104.7U CN217740972U (en) | 2022-08-11 | 2022-08-11 | Heating structure of He-Ne laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222108104.7U CN217740972U (en) | 2022-08-11 | 2022-08-11 | Heating structure of He-Ne laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217740972U true CN217740972U (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202222108104.7U Active CN217740972U (en) | 2022-08-11 | 2022-08-11 | Heating structure of He-Ne laser |
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| CN (1) | CN217740972U (en) |
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2022
- 2022-08-11 CN CN202222108104.7U patent/CN217740972U/en active Active
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Effective date of registration: 20230703 Address after: 712000 Room 2001, Floor 2, Zhumengchuangxiang Space, Zone A, China South Korea Industrial Park, Gaoke 3rd Road, High tech Industrial Development Zone, Xianyang City, Shaanxi Province Patentee after: Shaanxi Xuanguang Future Electronic Technology Co.,Ltd. Address before: No. 312-07, Block E, Science Park, Xi'an University of Technology, No. 26, Gazelle Road, High tech Zone, Xi'an, Shaanxi 710048 Patentee before: Xi'an Xuanguang Technology Co.,Ltd. |
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