CN111367331B - System and method for realizing high-precision temperature control of large-caliber nonlinear crystal by adopting local intensified heating - Google Patents
System and method for realizing high-precision temperature control of large-caliber nonlinear crystal by adopting local intensified heating Download PDFInfo
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- CN111367331B CN111367331B CN202010151145.7A CN202010151145A CN111367331B CN 111367331 B CN111367331 B CN 111367331B CN 202010151145 A CN202010151145 A CN 202010151145A CN 111367331 B CN111367331 B CN 111367331B
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Abstract
The invention provides a system for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating, which is characterized by comprising a first heater, a second heater, a first intensified heating plate, a first rotating shaft, a first heat insulation material, a crystal frame, a third heater, a second rotating shaft, a second heat insulation material, a second intensified heating plate, the large-caliber nonlinear crystal, a fourth heater and a PID controller. Aiming at the characteristics of low heat conductivity coefficient, fragility and easy deliquescence of the large-caliber nonlinear crystal and the requirements of low temperature gradient and rapid heating in the heating process, the temperature of the crystal is kept stable after heating is finished, and the integral temperature difference delta T is less than 0.1 ℃. The system and the method for realizing the high-precision temperature control of the large-caliber nonlinear crystal by adopting the local intensified heating are suitable for the characteristics of low heat conductivity coefficient, frangibility and easy deliquescence of the large-caliber nonlinear crystal, and meet the requirements of low temperature gradient and quick heating in the heating process.
Description
Technical Field
The invention relates to the field of high-precision temperature control, in particular to a system and a method for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating.
Background
With the rapid development of the laser frequency conversion technology, a light source with high stability, high conversion efficiency and high beam quality becomes the main direction of the development of the nonlinear laser technology. Among them, a nonlinear crystal temperature control device with high efficiency and high precision becomes one of the core devices for achieving the above-mentioned object.
For nonlinear crystal materials, the requirements on the precision and stability of a temperature controller are high in order to achieve the condition of phase matching. The accuracy of the temperature is generally required to fluctuate within a temperature difference Δ T of less than 0.1 ℃. At present, temperature control devices for nonlinear crystal materials are mainly divided into two main categories, namely, the temperature control devices are realized by a red copper clamp and a high-precision water tank; the other scheme is realized by adopting a red copper clamp and a high-precision TEC temperature control instrument. The two schemes can meet the temperature control requirement that the temperature difference delta T is less than 0.1 ℃. However, both of these solutions are realized by the high-precision operation of the external temperature control device, and the device cost and technical threshold are high.
Disclosure of Invention
The invention provides a system and a method for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating, aiming at the characteristics of low heat conductivity coefficient, fragility and easy deliquescence of the large-caliber nonlinear crystal, the requirements of low temperature gradient and quick heating in the heating process and the requirements of keeping the temperature of the crystal stable and ensuring that the integral temperature difference delta T is less than 0.1 ℃ after the heating is finished.
The invention relates to a system and a method for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating, wherein a local intensified heating scheme is adopted to heat the large-caliber nonlinear crystal. The invention is suitable for temperature control of large-caliber nonlinear crystals.
The technical scheme of the invention is as follows:
a system for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating is characterized by comprising a first heater 4, a second heater 5, a first intensified heating plate 6, a first rotating shaft 7, a first heat-insulating material 8, a crystal frame 9, a third heater 10, a second rotating shaft 11, a second heat-insulating material 12, a second intensified heating plate 13, a large-caliber nonlinear crystal 14, a fourth heater 15, a PID (proportion integration differentiation) controller 19, a first sealing switch 20 and a second sealing switch 21, wherein the large-caliber nonlinear crystal 14 and the crystal frame 9 are fixedly connected together through mechanical clamping, the first heater 4 and the third heater 10 are embedded in the crystal frame 9, the first heat-insulating material 8 and the second heat-insulating material 12 are respectively adhered to the left side and the right side of the crystal frame 9, the first intensified heating plate 6 and the second intensified heating plate 13 are positioned on the two sides of the crystal frame 9 and are fixedly connected with the crystal frame 9 through the first rotating shaft 7 and the second rotating shaft 11 which are respectively installed on the upper side of the crystal frame, a first sealing switch 20 and a second sealing switch 21 are installed on the lower side of the crystal frame 9, the first sealing switch 20 is connected with the first reinforced heating plate 6 and the crystal frame (9), and the second sealing switch 21 is connected with the second reinforced heating plate 13 and the crystal frame (9). The second heater 5 and the fourth heater 15 are respectively installed at the outer sides of the first and second intensive heating plates 6 and 13, and the temperature sensors are respectively installed, and the temperatures of the first and second intensive heating plates 6 and 13 are controlled by the temperature sensors and the power line 18 and the PID controller 19.
The system is arranged on a cavity 3 through a mechanical device, a heater 4 is arranged on the outer side of the cavity 3, a left end cover 2 and a right end cover 16 are respectively arranged on the left side and the right side of the cavity 3, and a left window 1 and a right window 17 which can be used for light transmission are respectively arranged on the left end cover 2 and the right end cover 16.
All heaters in the system realize temperature control through a temperature sensor and a PID controller.
A method for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating is characterized by comprising the following steps:
when the large-caliber crystal is heated,
vertically placing a left strengthening heating plate and a right strengthening heating plate, closing a sealing switch, connecting the strengthening heating plates with a crystal frame, and forming a sealing space between the crystal and the strengthening heating plates;
setting temperature values of a first heater, a second heater and a fourth heater, controlling the three heaters to reach preset temperature values through a PID (proportion integration differentiation) controller, heating the temperature of gas in the cavity through the first heater, and heating the crystal through heat convection of air between the reinforced heating plate and the crystal;
step (3) when the temperature of the crystal is heated to a certain temperature value, starting a third heater, and heating the crystal through heat conduction;
step (4) when the temperature of the crystal reaches a stable state, closing the second heater and the fourth heater, opening the first sealing switch and the second sealing switch, and driving the strengthening heating plate through the motor to enable the strengthening heating plate to be horizontally placed;
and (5) continuing to start the first heater and the third heater, and keeping the temperature of the crystal.
The system and the method for realizing the high-precision temperature control of the large-caliber nonlinear crystal by adopting the local intensified heating are suitable for the characteristics of low heat conductivity coefficient, frangibility and easy deliquescence of the large-caliber nonlinear crystal, and meet the requirements of low temperature gradient and quick heating in the heating process.
The invention relates to a system and a method for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local intensified heating, wherein a local intensified heating scheme is adopted to heat the large-caliber nonlinear crystal. The invention is suitable for temperature control of large-caliber nonlinear crystals. After heating, the crystal temperature is kept stable and the integral temperature difference delta T meets the requirement that the temperature is less than 0.1 ℃.
Drawings
FIG. 1 is a schematic structural diagram of a system for implementing high-precision temperature control of a large-caliber nonlinear crystal by local intensified heating according to the present invention.
Fig. 2 is a schematic structural diagram of a system for implementing high-precision temperature control of a large-aperture nonlinear crystal by using local intensified heating according to the embodiment of the invention.
FIG. 3 is a view of the monitoring point location of the embodiment.
Fig. 4 is a temperature change curve of the monitoring point in embodiment 1 of the present invention.
FIG. 5 is a temperature change curve diagram of monitoring points in embodiment 2 of the present invention.
In the figure, 1-left window, 2-left end cover, 3-cavity, 4-first heater 1, 5-second heater 2, 6-first intensified heating plate, 7-first rotating shaft, 8-first heat insulation material, 9-crystal frame, 10-third heater, 11-second rotating shaft, 12-second heat insulation material, 13-second intensified heating plate, 14-nonlinear crystal, 15-fourth heater, 16-right end cover, 17-right window, 18-temperature sensor and power line, 19-PID controller, 20-first sealing switch, 21-second sealing switch.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 5, a system for realizing high-precision temperature control of a large-caliber nonlinear crystal by using local heating enhancement comprises a first heater 4, a second heater 5, a first heating plate 6, a first rotating shaft 7, a first heat-insulating material 8, a crystal frame 9, a third heater 10, a second rotating shaft 11, a second heat-insulating material 12, a second heating plate 13, a large-caliber nonlinear crystal 14, a fourth heater 15, a PID controller 19, a first sealing switch 20 and a second sealing switch 21, wherein the large-caliber nonlinear crystal 14 and the crystal frame 9 are fixedly connected together by mechanical clamping, the first heater 4 and the third heater 10 are embedded in the crystal frame 9, the first heat-insulating material 8 and the second heat-insulating material 12 are respectively adhered to the left side and the right side of the crystal frame 9, the first heating plate 6 and the second heating plate 13 are positioned on the two sides of the crystal frame 9 and fixedly connected with the crystal frame 9 by the first rotating shaft 7 and the second rotating shaft 11 respectively installed on the upper side of the crystal frame 9, a first sealing switch 20 and a second sealing switch 21 are installed on the lower side of the crystal frame 9, the first sealing switch 20 is connected with the first reinforced heating plate 6 and the crystal frame (9), and the second sealing switch 21 is connected with the second reinforced heating plate 13 and the crystal frame (9). The second heater 5 and the fourth heater 15 are respectively installed at the outer sides of the first and second intensive heating plates 6 and 13, and the temperature sensors are respectively installed, and the temperatures of the first and second intensive heating plates 6 and 13 are controlled by the temperature sensors and the power line 18 and the PID controller 19.
The system for realizing the high-precision temperature control of the large-caliber nonlinear crystal by adopting the local intensified heating is arranged on a cavity 3 through a mechanical device, a heater 4 is arranged outside the cavity 3, a left end cover 2 and a right end cover 16 are respectively arranged at the left side and the right side of the cavity 3, and a left window 1 and a right window 17 which can be used for transmitting light are respectively arranged on the left end cover 2 and the right end cover 16.
All heaters in the device realize temperature control through a temperature sensor and a PID controller.
The method for realizing the high-precision temperature control of the large-caliber nonlinear crystal by adopting the local intensified heating has the working process as follows:
when the large-caliber crystal is heated, the method comprises the following steps:
vertically placing a left strengthening heating plate and a right strengthening heating plate, closing a sealing switch, connecting the strengthening heating plates with a crystal frame, and forming a sealing space between the crystal and the strengthening heating plates;
setting temperature values of a first heater, a second heater and a fourth heater, controlling the three heaters to reach preset temperature values through a PID (proportion integration differentiation) controller, heating the temperature of gas in the cavity through the first heater, and heating the crystal through heat convection of air between the reinforced heating plate and the crystal;
step (3) when the temperature of the crystal is heated to a certain temperature value, starting a third heater, and heating the crystal through heat conduction;
step (4) when the temperature of the crystal reaches a stable temperature, closing the second heater and the fourth heater, opening the first sealing switch and the second sealing switch, and driving the strengthening heating plate through the motor to enable the strengthening heating plate to be horizontally placed, as shown in fig. 2;
and (5) continuing to start the first heater and the third heater, and keeping the temperature of the crystal.
Example 1
An ADP crystal of 200 mm. times.200 mm. times.2 mm was heated, the size of the cavity was 800 mm. times.400 mm, the room temperature was set at 20 ℃ and the heating target temperature was 40 ℃.
Two schemes are adopted for comparison, the first scheme is a traditional heating scheme, and a heater 1 and a heater 3 are adopted for heating simultaneously; the coordinates of the monitoring points are 1(0, 0), 2(95, 95), 3(50, 50), 4(0, 50), 5(0, 95), 6(-95 ), 7(-50, -50), 8(0, -95) and 9(0, -50), respectively.
The results show that with the first heating protocol, the crystals stabilize after about 3 hours. The overall temperature difference of the stabilized crystal is 0.21 ℃, and the maximum difference of the crystal reaches 18 ℃ in the heating process, so that the crystal is easy to damage.
Example 2
The second method adopts local intensified heating method to heat. The crystal temperature change is measured by adopting a nine-point temperature measurement method as shown in the figure, and the coordinates of the monitoring points are respectively 1(0, 0), 2(95, 95), 3(50, 50), 4(0, 50), 5(0, 95), 6(-95 ), 7(-50, -50), 8(0, -95) and 9(0, -50).
Heating using the second heating protocol stabilized the temperature of the crystals for approximately 5 and a half hours. The integral temperature difference of the stabilized crystal is 0.08 ℃, the maximum temperature difference of the crystal in the heating process is 2.1 ℃, and the crystal is not easy to damage.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A system for realizing high-precision temperature control of a large-caliber nonlinear crystal by adopting local strengthening heating is characterized by comprising a first heater (4), a second heater (5), a first strengthening heating plate (6), a first rotating shaft (7), a first heat-insulating material (8), a crystal frame (9), a third heater (10), a second rotating shaft (11), a second heat-insulating material (12), a second strengthening heating plate (13), a large-caliber nonlinear crystal (14), a fourth heater (15), a PID (proportion integration differentiation) controller (19), a first sealing switch (20) and a second sealing switch (21), wherein the large-caliber nonlinear crystal (14) and the crystal frame (9) are fixedly connected together through mechanical clamping, the first heater (4) and the third heater (10) are embedded in the crystal frame (9), the first heat-insulating material (8) and the second heat-insulating material (12) are respectively adhered to the left side and the right side of the crystal frame (9), the first strengthening heating plate (6) and the second strengthening heating plate (13) are positioned at two sides of the crystal frame (9) and are fixedly connected with the crystal frame (9) through a first rotating shaft (7) and a second rotating shaft (11) which are arranged at the upper side of the crystal frame (9) respectively, a first sealing switch (20) and a second sealing switch (21) are arranged at the lower side of the crystal frame (9), the first sealing switch (20) is connected with the first strengthening heating plate (6) and the crystal frame (9), and the second sealing switch (21) is connected with the second strengthening heating plate (13) and the crystal frame (9); the outer sides of the first reinforced heating plate (6) and the second reinforced heating plate (13) are respectively provided with a second heater (5) and a fourth heater (15), and are respectively provided with a temperature sensor, and the temperature of the first reinforced heating plate (6) and the temperature of the second reinforced heating plate (13) are controlled by the temperature sensor, a power line (18) and a PID controller (19).
2. The system for realizing the high-precision temperature control of the large-caliber nonlinear crystal by adopting the local intensified heating as claimed in claim 1 is characterized in that the system is installed on a cavity (3) through a mechanical device, a first heater (4) is installed outside the cavity (3), a left end cover (2) and a right end cover (16) are respectively installed on the left side and the right side of the cavity (3), and a left window (1) and a right window (17) which can be used for light transmission are respectively installed on the left end cover (2) and the right end cover (16).
3. The system for realizing high-precision temperature control of the large-caliber nonlinear crystal by adopting the local intensified heating as claimed in claim 1, characterized in that all heaters in the system realize the temperature control by a temperature sensor and a PID controller.
4. A method for achieving high precision temperature control of a large caliber nonlinear crystal high precision temperature control system using local enhanced heating as claimed in claim 1, characterized by comprising the steps of:
when the large-caliber crystal is heated,
step (1), vertically placing a first reinforced heating plate (6) and a second reinforced heating plate (13), closing a sealing switch, connecting the reinforced heating plates with a crystal frame, and forming a sealing space between the crystal and the reinforced heating plates;
setting temperature values of a first heater, a second heater and a fourth heater, controlling the three heaters to reach preset temperature values through a PID (proportion integration differentiation) controller, heating the temperature of gas in the cavity through the first heater, and heating the crystal through heat convection of air between the reinforced heating plate and the crystal;
step (3) when the temperature of the crystal is heated to a certain temperature value, starting a third heater, and heating the crystal through heat conduction;
step (4) when the temperature of the crystal reaches a stable state, closing the second heater and the fourth heater, opening the first sealing switch and the second sealing switch, and driving the first reinforced heating plate (6) and the second reinforced heating plate (13) through the motor to be horizontally placed;
and (5) continuing to start the first heater and the third heater, and keeping the temperature of the crystal.
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| US11204536B1 (en) * | 2020-12-17 | 2021-12-21 | Raytheon Company | Ultra-stable dual-mode operation optical crystal assembly for harmonic conversion |
| CN113325901B (en) * | 2021-02-08 | 2021-12-21 | 南京工业大学 | Large-caliber nonlinear crystal heating method, system and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008177336A (en) * | 2007-01-18 | 2008-07-31 | Seiko Epson Corp | Light source device, projector, and monitoring equipment |
| CN101359146A (en) * | 2008-09-04 | 2009-02-04 | 华中科技大学 | Temperature control device for non-linear crystal |
| CN103794971A (en) * | 2014-02-26 | 2014-05-14 | 哈尔滨工业大学 | High-precision temperature control device with adjustable crystal caliber |
| CN105244751A (en) * | 2015-10-12 | 2016-01-13 | 哈尔滨工业大学 | Frequency multiplication conversion apparatus for realizing temperature regulation of large-caliber crystals with double temperature control modes |
-
2020
- 2020-03-05 CN CN202010151145.7A patent/CN111367331B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008177336A (en) * | 2007-01-18 | 2008-07-31 | Seiko Epson Corp | Light source device, projector, and monitoring equipment |
| CN101359146A (en) * | 2008-09-04 | 2009-02-04 | 华中科技大学 | Temperature control device for non-linear crystal |
| CN103794971A (en) * | 2014-02-26 | 2014-05-14 | 哈尔滨工业大学 | High-precision temperature control device with adjustable crystal caliber |
| CN105244751A (en) * | 2015-10-12 | 2016-01-13 | 哈尔滨工业大学 | Frequency multiplication conversion apparatus for realizing temperature regulation of large-caliber crystals with double temperature control modes |
Non-Patent Citations (2)
| Title |
|---|
| Study on the temperature gradient evolution of large size nonlinear crystal based on the fluid-solid coupling theory;F.Z.Sun等;《7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment》;20141231;第9282卷;全文 * |
| The influence of window thermal conductivity on the temperature distribution of the ADP crystal with large aperture;Fuzhong Sun等;《Optics Communications》;20150122;第19-25页 * |
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