CN114361918A - Laser light source pumping system with variable wavelength - Google Patents
Laser light source pumping system with variable wavelength Download PDFInfo
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- CN114361918A CN114361918A CN202210275664.3A CN202210275664A CN114361918A CN 114361918 A CN114361918 A CN 114361918A CN 202210275664 A CN202210275664 A CN 202210275664A CN 114361918 A CN114361918 A CN 114361918A
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Abstract
The invention provides a laser light source pumping system with variable wavelength, which relates to the technical field of laser, and comprises a light source module, a temperature control module, a pumping module, a wavelength control module and a light emitting module, wherein a laser diode is a light source of the light source module, the temperature control module comprises a temperature sensor, a light sensor and a semiconductor refrigerating sheet, the temperature of the light source module during working is controlled, the light source of the light source module sequentially passes through a converging objective lens, a laser crystal and a frequency doubling crystal in the pumping module, an a grating and the converging objective lens are integrated, the light source passes through the a grating before passing through the pumping module, the light emitting module comprises an output mirror and a magnifier, one side of the output mirror is attached with a b grating, the light source is subjected to secondary treatment after passing through the b grating and is subjected to enhanced emission through the output mirror and the magnifier, the wavelength of the laser is changed according to requirements, the operation is simple, the internal structure of the laser is more compact, the space in the laser is fully utilized, and the volume of the laser is reduced.
Description
Technical Field
The invention relates to the technical field of laser, in particular to a laser light source pumping system with variable wavelength.
Background
Patent No. CN201680085735.6, a laser includes a gain section and a plurality of gratings. Each grating is coupled to the gain section to form a corresponding optical resonant cavity capable of producing light of a particular wavelength. The laser also includes a switch for selecting one of the plurality of gratings such that an optical cavity formed by the gain section and the selected grating produces an optical output of the laser. This provides a laser that can be tuned between different wavelengths and provides a simple degree of tuning control.
The patent number is CN201310230943.9, a laser pumping device, a pump light generated by a pump light source module is transmitted by a transmission module and then divided into two paths of pump lights with orthogonal polarization directions by a polarization separation module, wherein one path of pump light is input into a convergence module after being spatially combined with another path of pump light in a light beam combining module after being processed by a light beam deformation module, and the convergence module converges the combined pump light into a laser crystal. The invention is applied to an end-pumped solid-state laser which adopts light guide transmission as a pumping light source and takes the crystal with linear polarization absorption characteristic as a laser working substance, can change a beam of natural polarized light into a beam of linearly polarized light, and improves the power injection and homogenization of the laser crystal with linear polarization absorption characteristic to pumping light under the condition of keeping the uniform power and space distribution of the pumping light to the maximum extent through polarization separation, polarization direction adjustment and beam synthesis, thereby greatly optimizing the design of the laser.
The output light that the laser instrument of above-mentioned patent sent can't change the wavelength of laser according to the demand, makes the power and the wavelength of outputting light reach required numerical value, and the operating personnel of being not convenient for controls the wavelength at will, and the troublesome poeration.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the laser light source pumping system with the variable wavelength, which solves the problem that the wavelength of laser is changed according to requirements, is simple to operate, has a more compact internal structure of the laser, fully utilizes the internal space of the laser and reduces the volume of the laser.
In order to achieve the purpose, the invention is realized by the following technical scheme: a variable wavelength laser light source pumping system, said system comprising:
the laser diode is a light source of the light source module;
the temperature control module comprises a temperature sensor, an optical sensor and a semiconductor refrigerating sheet and controls the temperature of the light source module during working;
the light source of the light source module sequentially passes through the convergent objective lens, the laser crystal and the frequency doubling crystal in the pumping module;
the wavelength control module comprises an a grating, the a grating is integrated with a converging objective lens of the pumping module, and a light source passes through the a grating before passing through the pumping module;
the light-emitting module comprises an output mirror and a magnifier, one side of the output mirror is attached with a b grating, and the light source passes through the b grating again through the output mirror.
Preferably, the light source module comprises a light source assembly, and a light pipe is attached to the outlet end of the light source assembly.
Preferably, the temperature control module comprises a semiconductor refrigeration piece, a temperature sensor and an optical sensor, the semiconductor refrigeration piece is located on one side of the light source module, the temperature sensor is attached to the surface of the light source module, the optical sensor is arranged at one end of the laser light source pumping system, and the semiconductor refrigeration piece, the temperature sensor and the optical sensor are electrically connected with each other.
Preferably, the pumping module comprises a converging objective lens, a laser crystal and a frequency doubling crystal, wherein the frequency doubling crystal and the laser crystal are mutually abutted, and the central points of the light source component, the converging objective lens, the laser crystal and the frequency doubling crystal are horizontally aligned.
Preferably, the wavelength control module group includes the a grating, a grating one side is fixed with the sleeve, it is equipped with the screw thread post to assemble objective one end, and the sleeve of a grating one side and the screw thread post threaded connection who assembles objective one end, and the a grating offsets with the screw thread post that assembles objective one end, and the light pipe is located between a grating and the light source subassembly, and light pipe one end offsets with the a grating.
Preferably, the export module includes delivery mirror and magnifying glass, the delivery mirror surface is equipped with the lantern ring, the spacing groove has been seted up to the lantern ring inner wall, and delivery mirror and the mutual block of spacing groove, lantern ring side is equipped with the b grating, and the b grating bonds each other with lantern ring side, and the protruding and delivery mirror counterbalance in b grating middle part, delivery mirror one side is equipped with the magnifying glass.
Preferably, the a grating and the b grating respectively comprise base planes, the controllable grating is arranged between the two base planes, the head end and the tail end of the controllable grating are respectively bonded with the base planes, the convex surface of the controllable grating is bonded with the bonding layer, and the bonding layer is bonded with the convex surface of the controllable grating.
(I) advantageous effects
The invention provides a laser light source pumping system with variable wavelength and a laser light source based on the same. The method has the following beneficial effects:
1. the invention takes the laser diode as the light source component of the light source module, the output end of the laser diode is connected with the convergent objective lens through the light pipe, so that the emitted light is prevented from diffusing outwards after being emitted by the light source, the emitted light is guided, the light source can smoothly enter the pumping module, the light source sequentially passes through the convergent objective lens, the laser crystal and the frequency doubling crystal, the central positions of the light source component, the convergent objective lens, the laser crystal and the frequency doubling crystal are mutually level and level, and the light source is enhanced after passing through the pumping module.
2. The invention integrates the a grating and the converging objective lens of the pumping component by adding the a grating, the back of the frame of the a grating is fixed with a sleeve, the sleeve and the frame of the a grating are integrally injection molded, the sleeve is in threaded connection with a threaded column at one end of the converging objective lens, the sleeve and the threaded column are aligned to rotate the frame of the a grating, the a grating and the converging objective lens are quickly assembled, the a grating is a transmission grating, the middle array of the a grating is provided with equally spaced and balanced slits, a light source is emitted under the action of single slit diffraction and multi slit interference of the a grating before entering a pumping module, the required a grating is selected, the wavelength of light is changed under the condition that the bright lines and the dark lines are mutually matched, the a grating and the converging objective lens of the pumping component are integrated, the volume of the laser is reduced, the component in the laser is more compact, and the a grating is close to the light source component, the light source is firstly contacted with the a grating, the wavelength of the light source is firstly changed, the required light source is enhanced in the pumping module, and the precision of pumping enhancement is improved.
3. The temperature control module is composed of a single chip microcomputer, a wavelength detector, a temperature sensor, a semiconductor refrigeration piece and a light sensor, wherein the semiconductor refrigeration piece is arranged around the light source component, the temperature of the light source component during working is detected in real time through the temperature sensor, the power and the wavelength of a light source are detected through the light sensor and the wavelength detector respectively, the single chip microcomputer is input with an instruction to control the semiconductor refrigeration piece to cool the light source component according to the temperature detected by the temperature sensor, the output wavelength and the output power reach required values, the heat emitted by the light source component during working is controlled, the light source component and a grating are matched to work simultaneously, the power and the wavelength of the light source are accurately changed, and the operation is simple.
4. According to the invention, the output mirror and the limiting groove on the inner wall of the sleeve ring are mutually buckled, the sleeve ring has toughness so as to facilitate the installation of the output mirror, the surface of the b grating is adhered to one surface of the sleeve ring, the bulge in the middle of the b grating is abutted against one surface of the output mirror, the b grating is assembled with the output mirror of the light emitting module, the light source filters redundant light source again through the b grating after passing through the pumping module, finally the light source passing through the b grating is used as required light source, and the light source is secondarily enhanced and emitted through the output mirror and the magnifier, so that the secondary treatment and secondary enhancement of the treated light source are realized.
5. The invention changes the grating, the controllable grating is DFB grating, the controllable grating has elasticity of gram stretch, the a grating and the b grating can be stretched or contracted according to the requirement, the controllable gratings of the a grating and the b grating expand outwards under the action of the tensile force, the period of the controllable gratings is uniformly increased, the wavelength emitted by the laser changes along with the increase of the stretching amount, the base surfaces of the a grating and the b grating can be extruded reversely, the controllable gratings are mutually attached, the bonding layer bonds the extruded gratings, the bonding effect of the bonding layer is general, the bonded controllable gratings can be stretched through external force, the wavelength emitted by the laser changes along with the reduction of the stretching amount, the secondary change of the used gratings is realized, the wavelength emitted by the laser can be changed along with the stretching or extruding of the light beam, and the method is simple.
Drawings
FIG. 1 is an overall schematic diagram of a laser of the present invention;
FIG. 2 is an overall view of a converging objective lens of the present invention;
FIG. 3 is an overall view of the output mirror of the present invention;
FIG. 4 is a system diagram of the present invention;
FIG. 5 is a drawing of a grating stretch of the present invention;
fig. 6 is a contraction diagram of the present invention.
The method comprises the following steps of 1, a laser light source pumping system; 101. a light source assembly; 102. a semiconductor refrigeration sheet; 103. a temperature sensor; 104. a light sensor; 105. a light pipe; 106. a converging objective lens; 1061. a threaded post; 1062. a sleeve; 1063. a, grating; 107. a laser crystal; 108. frequency doubling crystals; 109. an output mirror; 1091. a collar; 1092. a limiting groove; 1093. b, grating; 110. a magnifying glass; 11. a base surface; 12. a controllable grating; 13; and (5) an adhesive layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 and 4, an embodiment of the present invention provides a laser source pumping system 1 with variable wavelength, where the laser source pumping system 1 includes:
the laser diode is a light source of the light source module;
the temperature control module comprises a temperature sensor 103, an optical sensor 104 and a semiconductor refrigerating sheet 102 and controls the temperature of the light source module during working;
the light source of the light source module sequentially passes through the convergent objective 106, the laser crystal 107 and the frequency doubling crystal 108 in the pumping module;
the wavelength control module comprises an a grating 1063, the a grating 1063 is integrated with the converging objective 106 of the pumping module, and a light source passes through the a grating 1063 before passing through the pumping module;
the light-emitting module comprises an output mirror 109 and a magnifier 110, one side of the output mirror 109 is attached with a b grating 1093, and the light source passes through the b grating 1093 again through the output mirror 109.
The light source module comprises a light source component 101, a light pipe 105 is attached to the outlet end of the light source component 101, the pumping module comprises a converging objective lens 106, a laser crystal 107 and a frequency doubling crystal 108, the frequency doubling crystal 108 is mutually abutted against the laser crystal 107, the central points of the light source component 101, the converging objective lens 106, the laser crystal 107 and the frequency doubling crystal 108 are horizontally aligned, the light source component 101 of the light source module is a laser diode, the output end of the laser diode is connected with the converging objective lens 106 through the light pipe 105, the light emitted by the light source is prevented from diffusing outwards, the emitted light is guided, the light source can smoothly enter the pumping module, the light source sequentially passes through the converging objective lens 106, the laser crystal 107 and the frequency doubling crystal 108, and the central positions of the light source component 101, the converging objective lens 106, the laser crystal 107 and the frequency doubling crystal 108 are mutually horizontally aligned, the laser crystal 107 and the frequency doubling crystal 108 are bonded possibly, and the light source is enhanced after passing through the pumping assembly.
Example two:
as shown in fig. 1 and 2, the wavelength control module includes an a-grating 1063, a sleeve 1062 is fixed on one side of the a-grating 1063, a threaded post 1061 is disposed at one end of the converging objective 106, the sleeve 1062 on one side of the a-grating 1063 is in threaded connection with the threaded post 1061 on one end of the converging objective 106, the a-grating 1063 abuts against one end of the converging objective 106, a light pipe 105 is disposed between the a-grating 1063 and the light source assembly 101, one end of the light pipe 105 abuts against the a-grating 1063, the a-grating 1063 and the converging objective 106 of the pumping assembly are integrated by adding the a-grating 1063, the sleeve 1062 is fixed on the back of the frame of the a-grating 1063, the sleeve 1062 and the frame of the a-grating 1063 are integrally formed by injection molding, the sleeve 1062 is in threaded connection with the threaded post 1061 on one end of the converging objective 106, the sleeve 1062 and the threaded post 1061 are aligned with the frame of the rotating the a-grating 1063, the a-grating 1063 and the converging objective 106 are assembled, the a-grating 1063 is a-grating, the array in the middle of the a-grating 1063 is provided with equally spaced and balanced slits, when a light source enters the pumping module, the light source is emitted under the action of single slit diffraction and multi slit interference of the a-grating 1063, the required a-grating 1063 is selected, the wavelength of light is changed under the condition that the light source is mutually matched with the dark fringes, the a-grating 1063 and the converging objective lens 106 of the pumping module are integrated, the volume of the laser is reduced, the components in the laser are more compact, the a-grating 1063 is close to the light source component 101, the light source is firstly contacted with the a-grating 1063, the wavelength of the light source is firstly changed, the proper a-grating 1063 is selected, the condition of the light fringes and the dark fringes is within a set range under the mutual modulation of the single slit diffraction and the multi slit interference of the a-grating 1063, the number of the light fringes is more than or more than the number of the dark fringes, the intensity of the light is reduced, the light intensity of the light is reduced, and the light intensity of the dark fringes is increased, so that the condition of the light fringes and the light fringes is controlled, a change in wavelength is achieved.
the optical path difference formula is as follows:
when the optical path difference is equal to the integral multiple of the wavelength, the more grating slit stripes are, the brighter bright stripes are, and the formula is as follows:
when the grating bright lines meet the dark lines of single slit diffraction, the light sources can be balanced to generate an electrode lack, and the formula is as follows:
example three:
as shown in fig. 1, the temperature control module includes a semiconductor chilling plate 102, a temperature sensor 103 and a light sensor 104, the semiconductor chilling plate 102 is located at one side of the light source module, the surface of the light source module is attached with the temperature sensor 103, one end of the laser light source pumping system 1 is provided with the light sensor 104, the semiconductor chilling plate 102, the temperature sensor 103 and the light sensor 104 are electrically connected with each other, the temperature control module is respectively composed of a single chip microcomputer, a wavelength detector, the temperature sensor 103, the semiconductor chilling plate 102 and the light sensor 104, the semiconductor chilling plate 102 is installed around the light source assembly 101, the temperature of the light source assembly 101 during operation is detected in real time through the temperature sensor 103, the light sensor 104 is installed below the outlet end of the laser light source pumping system 1, the wavelength detector and the light sensor 104 are respectively connected with the display, and detected information can be transmitted to the display for being convenient for a person to check, detect the power and the wavelength of light source respectively through light sensor 104 and wavelength detector, according to the temperature that temperature sensor 103 detected, input instruction singlechip control semiconductor refrigeration piece 102 cools down to light source subassembly 101, the data is looked over to the display simultaneously, make the wavelength and the power of output reach required numerical value, the heat that control light source subassembly 101 gived off when carrying out the during operation, the higher the power is lower for the temperature of light source subassembly 101, the shorter the wavelength, a grating 1063 and the pumping subassembly simultaneous working that the temperature control module group cooperation was selected, the power and the wavelength of accurate change light source.
Example four:
as shown in fig. 1 and 3, the outlet module includes an output mirror 109 and a magnifying lens 110, a collar 1091 is disposed on a surface of the output mirror 109, a limiting groove 1092 is disposed on an inner wall of the collar 1091, the output mirror 109 and the limiting groove 1092 are engaged with each other, a b grating 1093 is disposed on a side surface of the collar 1091, the b grating 1093 and a side surface of the collar 1091 are adhered to each other, a protrusion in a middle of the b grating 1093 abuts against the output mirror 109, the magnifying lens 110 is disposed on one side of the output mirror 109, the output mirror 109 and the limiting groove 1092 on the inner wall of the collar 1091 are engaged with each other, the collar 1091 has toughness to facilitate installation of the output mirror 109, the surface of the b grating 1093 and the face of the collar 1091 are adhered to each other, the protrusion in the middle of the b grating 1093 abuts against the face of the output mirror 109, the b grating 1093 and the output mirror 109 of the light output module are assembled, a light source passes through the b grating 1093 and a grating 1063, and a light source is filtered through the b grating 1093, finally, the light source passing through the b grating 1093 is the required light source, and the light source is secondarily enhanced and emitted through the output lens 109 and the magnifier 110, so that the secondary treatment and the secondary enhancement of the treated light source are realized.
Example five:
as shown in fig. 5 and 6, the a grating 1063 and the b grating 1093 have the same structure, the a grating 1063 and the b grating 1093 respectively include base surfaces 11, the base surfaces 11 are respectively connected to the converging objective 106 and the output mirror 109, a controllable grating 12 is bonded between the two base surfaces 11, the controllable grating 12 is made of a stretchable elastic material to prepare the DFB grating, the distance between the two base surfaces 11 is increased when the controllable grating 12 is under a tensile force, the laser emission wavelength is uniformly increased along the axial direction and is changed along with the increase of the tensile amount, on the contrary, the two base surfaces 11 can be pressed, the controllable grating 12 is pressed under a force, the protrusions on the surface of the controllable grating 12 are mutually attached, the adhesive layer 13 adheres the pressed controllable grating 12, the adhesive effect of the adhesive layer 13 is general, the adhered controllable grating 12 can be stretched by an external force, the wavelength emitted by the laser can be changed along with the decrease of the tensile amount, for example, when the a grating 1063 and the b grating 1093 are separately installed, the controllable grating 12 may be bent such that the period of the grating changes as the bending angle changes, thereby changing the wavelength of the light.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. However, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Under the condition of no more limitation, the element limited by the sentence 'include a reference structure' does not exclude that other same elements exist in the process, method, article or equipment including the element, the required photo and video are selected by checking the recorded photo and video at the terminal, the selected video is decomposed into photos through the terminal, the required decomposed photo is selected again, all the required photos are arranged, a low-pass filtering method is firstly carried out, the noise in the image is removed, high-frequency signals such as edges and the like are enhanced, the blurred image is made to be clear, the spatial domain image enhancement method is then used for carrying out gray level correction, gray level transformation, histogram correction and the like, meanwhile, the image enhancement processing is carried out on the photo, and when the dynamically blurred photo exists, the terminal classifies the dynamically blurred photo and the dynamic blur restoration processing is carried out at the same time.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A variable wavelength laser light source pumping system, said system comprising:
the laser diode is a light source of the light source module;
the temperature control module comprises a temperature sensor (103), an optical sensor (104) and a semiconductor refrigerating piece (102), and controls the temperature of the light source module during working;
the light source of the light source module sequentially passes through a converging objective lens (106), a laser crystal (107) and a frequency doubling crystal (108) in the pumping module;
the wavelength control module comprises an a grating (1063), the a grating (1063) is integrated with a converging objective lens (106) of the pumping module, and a light source passes through the a grating (1063) before passing through the pumping module;
the light-emitting module comprises an output mirror (109) and a magnifier (110), one surface of the output mirror (109) is attached with a b grating (1093), and a light source passes through the b grating (1093) again through the output mirror (109).
2. The variable wavelength laser light source pumping system according to claim 1, wherein: the light source module comprises a light source component (101), and a light pipe (105) is attached to the outlet end of the light source component (101).
3. The variable wavelength laser light source pumping system according to claim 2, characterized in that: the temperature control module comprises a semiconductor refrigeration piece (102), a temperature sensor (103) and an optical sensor (104), wherein the semiconductor refrigeration piece (102) is located on one side of the light source module, the surface of the light source module is attached with the temperature sensor (103), the optical sensor (104) is arranged at one end of the laser light source pumping system (1), and the semiconductor refrigeration piece (102), the temperature sensor (103) and the optical sensor (104) are electrically connected with one another.
4. The variable wavelength laser light source pumping system according to claim 2, characterized in that: the pumping module comprises a converging objective lens (106), a laser crystal (107) and a frequency doubling crystal (108), wherein the frequency doubling crystal (108) is mutually abutted to the laser crystal (107), and the central points of the light source assembly (101), the converging objective lens (106), the laser crystal (107) and the frequency doubling crystal (108) are horizontally aligned.
5. The variable wavelength laser light source pumping system according to claim 4, wherein: the wavelength control module comprises an a grating (1063), a sleeve (1062) is fixed on one side of the a grating (1063), a threaded column (1061) is arranged at one end of the converging objective lens (106), the sleeve (1062) on one side of the a grating (1063) is in threaded connection with the threaded column (1061) at one end of the converging objective lens (106), the a grating (1063) is abutted to one end of the converging objective lens (106), the light pipe (105) is located between the a grating (1063) and the light source component (101), and one end of the light pipe (105) is abutted to the a grating (1063).
6. The variable wavelength laser light source pumping system according to claim 2, characterized in that: the export module includes output mirror (109) and magnifying glass (110), output mirror (109) surface is equipped with lantern ring (1091), spacing groove (1092) have been seted up to lantern ring (1091) inner wall, and output mirror (109) and spacing groove (1092) block each other, lantern ring (1091) side is equipped with b grating (1093), and b grating (1093) and lantern ring (1091) side adhere to each other, and protruding and the counterbalance of output mirror (109) in b grating (1093) middle part, output mirror (109) one side is equipped with magnifying glass (110).
7. The variable wavelength laser light source pumping system according to claim 2, characterized in that: the a grating (1063) and the b grating (1093) respectively comprise base surfaces (11), a controllable grating (12) is arranged between the two base surfaces (11), the head end and the tail end of the controllable grating (12) are respectively bonded with the base surfaces (11), a bonding layer (13) is attached to the protruding surface of the controllable grating (12), and the bonding layer (13) is bonded with the protruding surface of the controllable grating (12).
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Application publication date: 20220415 |