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CN105610045B - Temperature control device for laser resonant cavity - Google Patents

Temperature control device for laser resonant cavity Download PDF

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Publication number
CN105610045B
CN105610045B CN201610179169.7A CN201610179169A CN105610045B CN 105610045 B CN105610045 B CN 105610045B CN 201610179169 A CN201610179169 A CN 201610179169A CN 105610045 B CN105610045 B CN 105610045B
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crystal
furnace body
resonant cavity
temperature control
control device
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CN201610179169.7A
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CN105610045A (en
Inventor
吕新杰
刘奕辰
陈伟
李宇昕
赵刚
祝世宁
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Nanjing University
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Nanjing University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1317—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
    • H01S3/137—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity for stabilising of frequency

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

The invention provides a temperature control device for a laser resonant cavity, which comprises a furnace body and a base, wherein the furnace body and the base are arranged in a variable-frequency laser resonant cavity; the top of the furnace body is provided with a crystal carrying table, and the side surface of the crystal carrying table is provided with a wedge-shaped sliding block, and the top of the crystal carrying table is provided with an elastic pressing sheet to tightly push and press the nonlinear crystal, so that the mechanical stability of the crystal is ensured; the whole structure is a sandwich structure, the center is a furnace body, the exposed part of the furnace body with heat insulation materials at the periphery is only a light-transmitting part, the heat exchange of the furnace body with the outside is reduced, and the heat balance of the crystal is ensured. The heating speed is reduced by adopting the low-power heating resistance wire, the temperature generated by temperature supersaturation is prevented from oscillating up and down, the volume of the furnace body is reduced, the frontal area of the furnace body is matched with the crystal surface, and most of heat is transferred to the crystal. The tested crystal temperature can be accurate to 0.05 ℃. The heat insulation layer is subjected to light passing treatment, so that the phenomenon that the device blocks light in a folding resonant cavity is avoided, and the device is suitable for various laser resonant cavities.

Description

A kind of temperature control device in laser resonator
Technical field
The present invention relates to nonlinear optics laser frequency fields, and in particular to one kind is placed in frequency conversion laser resonant cavity and uses In the temperature control device for fixing and controlling laser frequency crystal temperature effect.
Background technique
In nonlinear optics, nonlinear crystal is the core devices of laser frequency, and laser level is right by crystal Laser progress is wavelength converting, and control light realizes the frequency conversion of different wave length laser by the different location and corresponding temperature of crystal Output, 1 degree Celsius of general temperature change, transmitting optical maser wavelength can change 0.15nm.Therefore one is needed in laser frequency technology Kind temperature regulating device carries out temperature control processing to crystal to fix aid nonlinear crystal.Laser frequency crystal is humorous in laser frequency Position deformation and temperature change, which can export the frequency conversion of laser, in vibration chamber produces a very large impact, and laser frequency resonant cavity is again a variety of Multiplicity, a kind of high mechanical stability, temperature-control performance are good and are applicable to the crystal of different structure resonant cavity aid temperature control device It is essential.
Temperature control device furnace body volume currently on the market is big, is not particularly suited for a variety of laser resonators, crystal fixed form It is single, it is not suitable for Multiple Type thickness crystal, mechanical stability is poor, influences vulnerable to temperature deformation.
Summary of the invention
Goal of the invention: in order to solve above-mentioned the deficiencies in the prior art, the present invention provides one kind in laser resonator Temperature control device, furnace body is small in size, good mechanical stability, and temperature control accurate, ability are strong and are suitable for a variety of laser resonators.
Technical solution: a kind of temperature control device in laser resonator, including being placed in frequency conversion laser resonant cavity Furnace body and pedestal；The side wall of the furnace body is equipped with through-hole and groove, and the top of the furnace body, which is equipped with, carries brilliant platform, the brilliant platform of load Side wall is equipped with convex baffle, and the brilliant platform of the load is equipped with wedge block and crystal accommodating chamber, and the wedge-shaped side of the wedge block is set It sets in the side close to the crystal accommodating chamber；Flexible pressure is all provided at the top of the wedge block and the crystal accommodating chamber Piece, the side of the elastic pressuring plate and the boss of the convex baffle are equipped with, and temperature control device overall structure is sandwich knot Structure, center are furnace body, and surrounding is heat-barrier material, and the exposed position of furnace body is light passing part.
Further, the surrounding of the furnace body and top are equipped with thermal insulation board, and the thermal insulation board is fixedly connected on the pedestal On.
Further, a side wall of the furnace body is equipped with step, and the lower part of the step is equipped with through-hole and through-hole side Equipped with groove；The through-hole is used to place heating rod, and heating rod is goed deep into furnace body by through-hole, two groups of parallel connections of coiling on heating rod Heating wire；The groove is for placing thermistor, for detecting the temperature of furnace body material, furnace body and places thermistor Material is brass or red metal.
Further, the furnace body carries brilliant platform entire area and is all used to and crystal contact, the crystalline substance of the furnace body, the furnace body Body receiving cavity area is identical as crystalline areas, and wedge block is close to elastic pressuring plate elasticity and wraps crystal；Wedge block and Elastic pressuring plate material is all the easy heat-conducting such as brass.
Further, described thermal insulation board two parts are set as wave structure containing all concave and concave inner wall inside upper cover.
Further, the thermal insulation board is the low material of thermal conductivity；Resistive heater in the furnace body is the two of parallel connection Group resistance wire；It is used when being kept the temperature using one group of small-power resistance wire.
Further, the furnace body is fixedly installed on the base by isolated tube.
Further, the isolated tube is hollow round tube, is screwed setting on the base.
Further, temperature control device thermal insulation board corner is provided with light hole, has opened up path channels.
The utility model has the advantages that the present invention provides a kind of temperature control device in laser resonator, by carrying brilliant platform side Elastic pressuring plate is arranged to push tight nonlinear crystal in setting wedge block, top, ensure that the mechanical stability of crystal；It carries simultaneously Brilliant platform, wedge block, elastic pressuring plate are the high material of thermal conductivity, and making crystal surrounding has heat source heating, reduce crystal and outer The heat exchange on boundary.Using the resistive heater of small size, it is big to avoid heating power, causes in heated saturation bring temperature Lower fluctuation, reduces furnace body volume；Thermal insulation layer has done light passing processing, and avoiding device in fold resonator has light-baffling phenomena, fits For a variety of laser resonators.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is furnace body attachment structure schematic diagram of the invention；
Fig. 3 is furnace structure schematic diagram of the invention；
Fig. 4 is the schematic diagram of internal structure of thermal insulation board of the invention；
Fig. 5 is thermal insulation board cover inside structural schematic diagram of the invention；
Fig. 6 is the inside path channels schematic diagram of temperature control device of the present invention；
Wherein, figure a is straight chamber access diagram, and figure b is ring resonator access diagram.
Specific embodiment
The present invention will be further described below with reference to the drawings.
Furnace body 1, isolated tube 3, thermal insulation board 4, step 5, through-hole 6, groove 7, carries brilliant platform 8, convex baffle 9, wedge shape at pedestal 2 Sliding block 10, crystal accommodating chamber 11, elastic pressuring plate 12, threaded hole 402, circular hole 401.
As shown in Figure 1, a kind of temperature control device in laser resonator, including being placed in frequency conversion laser resonant cavity Furnace body 1, pedestal 2 and thermal insulation board 4.
As shown in Fig. 2, furnace body 1 is fixed on pedestal 2 by isolated tube 3, isolated tube 3 plays support to furnace body 1 and makees With isolated tube 3 is hollow round tube, is screwed and is arranged on pedestal 2.
As shown in figure 3, the top of furnace body 1, which is equipped with, carries brilliant platform 8, the side wall for carrying brilliant platform 8 is equipped with convex baffle 9, carries on brilliant platform 8 Equipped with wedge block 10 and crystal accommodating chamber 11, the wedge-shaped side of wedge block 10 is positioned close to the side of crystal accommodating chamber 11, Crystal accommodating chamber 11 integrally wraps crystal, crystal surrounding is made to have heat source for placing nonlinear crystal, avoid crystal with Extraneous heat exchange.
The top of wedge block 10 and crystal accommodating chamber 11 is equipped with elastic pressuring plate 12, and elastic pressuring plate 12 (is placed in thermal insulation board Cover inside) side and the boss of convex baffle 9 be equipped with.Wedge block 10 and elastic pressuring plate 12 are non-for fixed aid Linear crystal ensure that the mechanical stability of crystal to push tight nonlinear crystal.Device occurs in annular chamber in order to prevent Light-baffling phenomena, setting carry the convex baffle 9 that brilliant platform side block body is slimline, avoid light-baffling phenomena.
One side wall of furnace body 1 is equipped with step 5, and the lower part of step 5 is equipped with through-hole 6 and through-hole side is equipped with groove 7；Through-hole 6 are used to place heating rod, and heating rod is goed deep into furnace body by through-hole, two groups of heating wire in parallel of coiling on heating rod；Groove 7 is used In placing thermistor, for detecting the temperature of furnace body material, furnace body and the material for placing thermistor are brass or red metal etc. Material that is easily thermally conductive, being not easy deformation.
The surrounding of furnace body 1 and top are equipped with thermal insulation board 4, and thermal insulation board 4 is fixedly connected on pedestal 2, and thermal insulation board top opens up Light hole, avoiding device in fold resonator has light-baffling phenomena.Pedestal 2 is hard material production, such as duralumin；It is set on pedestal 2 There is threaded hole, pedestal 2 is connected with each other by screw and thermal insulation board 4, furnace body 1.
There are gaps between furnace body 1 and thermal insulation board 4.Thermal insulation board 4 is heat-barrier material production, such as polytetrafluoroethylene (PTFE), is used for Completely cut off influence of the external thermal field to furnace body temperature, reduces heat exchange.
As shown in figure 4, the 4 concave and concave inner wall in inside of thermal insulation board is set as wave structure, concave structure can make heat product It is tired, reduce the influence of extraneous thermal field.The corner location of thermal insulation board 4 is equipped with threaded hole 402.The heat-insulated of 1 bottom of furnace body is set Plate center is equipped with circular hole 401, and isolated tube 3 passes through circular hole 401 and connects pedestal 2.Fig. 5 is thermal insulation board cover inside structure of the invention Schematic diagram.
In different laser resonators, path channels are as shown in Figure 6 inside temperature control device: where figure a is simple straight Chamber, optical path is not folded, and common temperature control device can meet its requirement；Figure b is ring resonator, and temperature control device design is small Ingeniously, and since optical path is bent, temperature control device is provided with light hole in 4 corner of thermal insulation board, has opened up path channels, has avoided dress Setting has light-baffling phenomena in annular or the resonant cavity folded.
The present invention provides a kind of temperature control devices in laser resonator, by sliding in the brilliant platform side setting wedge shape of load Elastic pressuring plate is arranged to push tight nonlinear crystal in block, top, ensure that the mechanical stability of crystal；Brilliant platform is carried simultaneously, wedge shape Sliding block, elastic pressuring plate are the high material of thermal conductivity, and making crystal surrounding has heat source heating, reduce crystal and extraneous heat is handed over It changes；Using the resistive heater of small size, it is big to avoid heating power, and heated saturation bring temperature is caused to fluctuate up and down； Reduce furnace body volume；Thermal insulation layer has done through-hole, i.e. light passing and has handled, and avoiding device in fold resonator has light-baffling phenomena.Furnace Body is small in size, structure is simple, good mechanical stability, is suitable for a variety of laser resonators.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (6)

1.一种用于激光谐振腔中的温控装置，其特征在于：包括放置在变频激光谐振腔中的炉体（1）和底座（2）；所述炉体（1）的顶部设有载晶台（8），所述载晶台(8)的面积与晶体面积相同,载晶台(8)全部面积都用来与晶体接触，所述载晶台（8）的侧壁设有凸形挡板（9），所述载晶台（8）上设有楔形滑块（10）和晶体容纳腔（11），所述楔形滑块（10）的楔形边设置在靠近所述晶体容纳腔（11）的一侧；所述楔形滑块（10）和所述晶体容纳腔（11）的顶部均设有弹性压片（12），所述弹性压片（12）的侧边与所述凸形挡板（9）的凸台配合设置，楔形滑块（10）与弹性压片（12）弹性紧贴并包裹住晶体；温控装置整体结构为三明治结构，中心为炉体（1），四周为隔热板（4），炉体（1）的裸露部位为通光部分，所述隔热板（4）固定连接在所述底座（2）上；1. A temperature control device for use in a laser resonant cavity, characterized in that: it comprises a furnace body (1) and a base (2) placed in the frequency conversion laser resonant cavity; the top of the furnace body (1) is provided with The crystal stage (8), the area of the crystal stage (8) is the same as that of the crystal, the entire area of the crystal stage (8) is used for contact with the crystal, and the side wall of the crystal stage (8) is provided with A convex baffle plate (9), a wedge-shaped slider (10) and a crystal accommodating cavity (11) are arranged on the crystal stage (8), and the wedge-shaped edge of the wedge-shaped slider (10) is arranged close to the crystal One side of the accommodating cavity (11); the wedge-shaped slider (10) and the top of the crystal accommodating cavity (11) are provided with elastic pressing pieces (12), and the sides of the elastic pressing pieces (12) are The bosses of the convex baffle plate (9) are arranged in cooperation, and the wedge-shaped slider (10) and the elastic pressing sheet (12) are elastically close to and wrap the crystal; the overall structure of the temperature control device is a sandwich structure, and the center is the furnace body ( 1), surrounded by a heat insulating plate (4), the exposed part of the furnace body (1) is a light-transmitting part, and the heat insulating plate (4) is fixedly connected to the base (2); 所述炉体（1）的一个侧壁设有台阶（5），所述台阶（5）的下部设有通孔（6）和通孔（6）旁侧的凹槽（7）；所述通孔（6）用来放置加热棒，加热棒通过通孔（6）深入炉体（1）内，加热棒上绕制两组并联的电热丝；所述凹槽（7）用于放置热敏电阻，以检测炉体（1）材料的温度，炉体（1）及凹槽（7）的材料为黄铜或红铜；One side wall of the furnace body (1) is provided with a step (5), and the lower part of the step (5) is provided with a through hole (6) and a groove (7) beside the through hole (6); the The through hole (6) is used to place the heating rod, the heating rod penetrates into the furnace body (1) through the through hole (6), and two groups of parallel heating wires are wound on the heating rod; the groove (7) is used for placing the heating rod. Varistor to detect the temperature of the furnace body (1) material, the furnace body (1) and the groove (7) are made of brass or red copper; 楔形滑块（10）和弹性压片（12）的材料皆为黄铜。The material of the wedge-shaped slider (10) and the elastic pressing piece (12) are all brass. 2.根据权利要求1所述的一种用于激光谐振腔中的温控装置，其特征在于：所述隔热板（4）含上盖，上盖内壁皆呈凹形，且凹形结构具体波浪结构。2 . The temperature control device used in a laser resonant cavity according to claim 1 , wherein the heat insulating plate ( 4 ) includes an upper cover, and the inner walls of the upper cover are all concave and have a concave structure. 3 . Concrete wave structure. 3.根据权利要求1所述的一种用于激光谐振腔中的温控装置，其特征在于：所述炉体（1）中的电热丝为并联的两组电阻丝；其中一组小功率电阻丝用于保温。3. A temperature control device for use in a laser resonant cavity according to claim 1, characterized in that: the heating wires in the furnace body (1) are two groups of resistance wires connected in parallel; Resistance wire is used for insulation. 4.根据权利要求1所述的一种用于激光谐振腔中的温控装置，其特征在于：所述炉体（1）通过隔离管（3）固定设置在所述底座（2）上。4 . The temperature control device used in a laser resonant cavity according to claim 1 , wherein the furnace body ( 1 ) is fixedly arranged on the base ( 2 ) through an isolation tube ( 3 ). 5 . 5.根据权利要求4所述的一种用于激光谐振腔中的温控装置，其特征在于：所述隔离管（3）为中空的圆管，通过螺丝固定设置在所述底座（2）上。5. A temperature control device for use in a laser resonant cavity according to claim 4, characterized in that: the isolation tube (3) is a hollow circular tube, which is fixed on the base (2) by screws superior. 6.根据权利要求1所述的一种用于激光谐振腔中的温控装置，其特征在于：所述隔热板（4）拐角处设置有通光孔，用于开设光路通道。6 . The temperature control device used in a laser resonant cavity according to claim 1 , characterized in that: the corners of the heat insulating plate ( 4 ) are provided with light-passing holes for opening optical paths. 7 .
CN201610179169.7A 2016-03-25 2016-03-25 Temperature control device for laser resonant cavity Active CN105610045B (en)

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CN109921271A (en) * 2017-12-13 2019-06-21 中国科学院大连化学物理研究所 A crystal thermostat with adjustable mechanical position
CN110161726B (en) * 2019-05-15 2022-07-12 上海硅酸盐研究所中试基地 Bridge type crystal radiating block

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CN203312263U (en) * 2013-05-23 2013-11-27 京东方科技集团股份有限公司 Tool for locking and attaching encapsulation transistor
CN205985739U (en) * 2016-03-25 2017-02-22 南京大学 A temperature control device used in laser resonator

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CN102570250A (en) * 2011-04-06 2012-07-11 北京国科世纪激光技术有限公司 Optical crystal heat radiation apparatus and optical crystal heat radiation system
CN102570252A (en) * 2012-01-18 2012-07-11 清华大学 Nonlinear crystal temperature control device
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