CN117577505A - Micro focus excitation light source device for light and small TOF mass spectrometer - Google Patents
Micro focus excitation light source device for light and small TOF mass spectrometer Download PDFInfo
- Publication number
- CN117577505A CN117577505A CN202311383142.6A CN202311383142A CN117577505A CN 117577505 A CN117577505 A CN 117577505A CN 202311383142 A CN202311383142 A CN 202311383142A CN 117577505 A CN117577505 A CN 117577505A
- Authority
- CN
- China
- Prior art keywords
- laser
- seat
- gain medium
- lens
- adjusting seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005284 excitation Effects 0.000 title claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 47
- 238000005086 pumping Methods 0.000 claims abstract description 21
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims description 29
- 239000013078 crystal Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 230000017525 heat dissipation Effects 0.000 claims description 6
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 22
- 239000002184 metal Substances 0.000 description 22
- 230000006872 improvement Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0409—Sample holders or containers
- H01J49/0418—Sample holders or containers for laser desorption, e.g. matrix-assisted laser desorption/ionisation [MALDI] plates or surface enhanced laser desorption/ionisation [SELDI] plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/26—Mass spectrometers or separator tubes
- H01J49/34—Dynamic spectrometers
- H01J49/40—Time-of-flight spectrometers
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention relates to the technical field of time-of-flight mass spectrometers, in particular to a miniature microfocus excitation light source device for a light and small TOF mass spectrometer, which comprises: a laser (1) and an energy conditioning and focusing system (2); wherein the laser (1) comprises: the laser comprises an optical pumping source (12), a lens group (13), a laser gain medium (14) and a fixing and adjusting structure; wherein the fixing and adjusting structure is used for aligning and assembling the optical pumping source (12), the lens group (13), the laser gain medium (14) and the energy adjusting and focusing system (2); is used for adjusting the distance between the lens group (13) and the laser gain medium (14) based on the focal length of the lens group (13), and is also used for controlling the temperature of the optical pumping source (12) and the laser gain medium (14).
Description
Technical Field
The invention relates to the technical field of time-of-flight mass spectrometers, in particular to a miniature microfocus excitation light source device for a light and small TOF mass spectrometer.
Background
A Time Of Flight mass spectrometer (TOF) is an instrument for analyzing the ion species and content Of a substance by measuring the Time Of Flight Of different ions to determine their mass. The light and small TOF mass spectrometer has the advantages of light weight, small volume, strong measurement capability and the like, can theoretically realize the measurement of each element in the periodic table of the measured elements, namely the measurement of all elements from H-U, has the detection limit reaching ppb (part per billion) level, has the mass resolution reaching more than 1000, can distinguish isotopes of the elements, and has the key functions in the research of planetary formation and evolution process of the TOF, so that the TOF has important application prospect and advantage in deep space exploration.
Light and small TOF mass spectrometers require an excitation light source to ablate the sample, converting molecules or atoms in the sample into ions, the energy density of which must be above 1GW/cm "2, in order to produce such high irradiance intensities from compact solid state lasers, a short pulse Q-switch system is required, which is also advantageous for coupling with a TOF mass analyser. Conventional solid state lasers typically employ relatively large lasing media, require complex external support structures and cooling systems, are bulky, consume relatively high amounts of energy, and cannot meet the resource constraint requirements of deep space exploration.
Excitation light source arrangements with cooling systems are particularly important in light-weight and small-scale TOF mass spectrometers. The optical pump source and the laser gain medium can generate heat during operation, and the optical pump source and the laser gain medium are very sensitive to temperature change, and the laser wavelength can change by about 0.2-0.3nm when the temperature fluctuates by 1 ℃; the laser lifetime decreases by an order of magnitude for every 30 c increase in temperature. Therefore, in order to meet the requirement of deep space exploration, it is needed to design an excitation light source device with good cooling function for a light and small TOF mass spectrometer, and small in size and light in weight.
Disclosure of Invention
The invention aims to solve the problems that the existing laser for the light and small-sized time-of-flight mass spectrometer is complex in structure, huge in size and high in energy efficiency, and cannot meet the deep space detection resource constraint, so that a miniature micro-focus excitation light source device for the light and small-sized TOF mass spectrometer is provided.
In order to solve the above technical problems, the micro-focus excitation light source device for a light and small TOF mass spectrometer provided by the technical scheme of the present invention includes: a laser 1 and an energy conditioning and focusing system 2; wherein the laser 1 comprises: the optical pump comprises an optical pump source 12, a lens group 13, a laser gain medium 14 and a fixing and adjusting structure; wherein,
the optical pumping source 12 is used for modulating laser and outputting;
the lens group 13 is configured to receive the laser light output by the optical pumping source 12, and perform beam control and optical focusing processing on the laser light;
the laser gain medium 14 is configured to receive and amplify the laser light processed by the lens group 13, accumulate a gain of a signal when the laser light passes through, and become laser light with higher power, and take the laser light with higher power as output laser light of the laser 1;
the energy adjusting and focusing system 2 is used for adjusting the focal length and focal spot size of the output laser of the laser 1, continuously adjusting the power of the output laser of the laser 1, and outputting the adjusted laser to a target to be measured of a TOF mass spectrometer;
the fixing and adjusting structure is used for aligning and assembling the optical pumping source 12, the lens group 13, the laser gain medium 14 and the energy adjusting and focusing system 2; for adjusting the distance between the lens group 13 and the laser gain medium 14 based on the focal length of the lens group 13, and for controlling the temperature of the optically pumped source 12 and the laser gain medium 14.
As an improvement of the above device, the fixing and adjusting structure comprises:
the shell 11 is of a hollow structure, and a groove is formed in the bottom of the shell 11;
a semiconductor refrigerator 18, the semiconductor refrigerator 18 being disposed within the recess and having a height greater than the height of the recess;
a laser assembly adjusting seat 17, wherein the laser assembly adjusting seat 17 is fixedly connected to the shell 11, and the lower surface of the laser assembly adjusting seat is attached to the upper surface of the semiconductor refrigerator 18;
a lens holder 15, wherein the lens holder 15 is movably connected to the laser assembly adjusting holder 17 and is attached to the upper surface of the laser assembly adjusting holder 17, and is used for installing the lens group 13;
a press button 16, the press button 16 being selectively connected to the laser assembly adjustment seat 17 for clamping the laser gain medium 14 to the laser assembly adjustment seat 17; and
the thermistor 19 is arranged in the laser component adjusting seat 17 and is used for monitoring the temperature of the laser component adjusting seat 17 and adjusting the working temperature of the semiconductor refrigerator 18 according to the feedback value of the temperature; the optical pumping source 12 is mounted to the laser assembly adjusting seat 17 and is attached to the upper surface of the laser assembly adjusting seat 17;
the energy conditioning and focusing system 2 is mounted to a housing 11.
As a modification of the above-described apparatus, the projected shapes of the housing 11, the semiconductor refrigerator 18 and the laser module adjusting mount 17 are all rectangular; wherein,
the laser assembly adjustment seat 17 covers the semiconductor refrigerator 18;
the laser assembly adjustment seat 17 is mounted inside the housing 11 by means of four lugs 171 connected respectively to the vicinity of its four outer corners, wherein the lugs 171 are not in contact with the semiconductor refrigerator 18, so as to reduce the heat conduction between the laser assembly adjustment seat 17 and the housing 11.
As an improvement of the above device, the laser assembly adjusting seat 17 is provided with first bosses 173 at corresponding positions at two ends of the lens card seat 15, and a first boss through groove 174 is provided between the two first bosses 173, so as to reduce the contact area between the lens card seat 15 and the laser assembly adjusting seat 17, so as to reduce the heat dissipation power consumption of the laser assembly adjusting seat 17.
As an improvement of the above device, the laser component adjusting seat 17 is provided with a second boss 172 at a position corresponding to the press buckle 16, for placing the laser gain medium 14; wherein,
the second boss 172 is a trapezoidal boss, and is used for increasing the contact area between the laser gain medium 14 and the laser component adjusting seat 17 so as to improve heat conduction between the two;
the shape of the press buckle 16 is symmetrical to the second boss 172, and is used for clamping the laser gain medium 14 to the second boss 172, and cladding the non-working surface of the laser gain medium 14 together with the second boss 172.
As an improvement of the above device, a metal indium foil is further disposed between the second boss 172 and the laser gain medium 14 to increase the heat conduction efficiency between the laser gain medium 14 and the laser assembly adjusting seat 17.
As a modification of the above-described device, the lens holder 15 is provided with a lens opening 153 for mounting the lens group 13;
the two ends of the lens clamping seat 15 are respectively provided with a first strip-shaped lens clamping seat through groove 151 and a second strip-shaped lens clamping seat through groove 152 in the direction perpendicular to the laser component adjusting seat 17; the first through groove 151 and the second through groove 152 are parallel to the collimating light path between the lens group 13 and the laser gain medium 14;
the lens holder 15 is movably connected to the laser assembly adjusting holder 17 through a lens holder first through groove 151 and a lens holder second through groove 152 to adjust the distance between the lens group 13 and the laser gain medium 14.
As an improvement of the above device, the energy conditioning and focusing system 2 comprises:
a power adjuster 21 for continuously adjusting the power of the output laser light of the laser 1; and
a focusing assembly 22, the focusing assembly 22 being used for adjusting the focal length and focal spot size of the output laser light of the laser 1; the focusing assembly 22 is provided with a slot 223 for placing the power adjuster 21 to adjust the angle of the power adjuster 21;
the housing 11 is provided with:
a first opening 181 for mounting the focusing assembly 22 such that the focusing assembly 22 is aligned with the laser gain medium 14;
the second opening is used for connecting with an upper computer.
As an improvement of the device, the shell 11 is made of aluminum alloy, so as to reduce the weight of the shell 11;
the pressing buckle 16 and the laser component adjusting seat 17 are made of brass, and are used for guaranteeing heat conductivity;
the lens holder 15 is made of polyimide for ensuring heat insulation.
As an improvement of the above arrangement, the power regulator 21 includes: a combination of half wave plate and polarizing crystal or an optical filter;
the optical pumping source 12 includes: a semiconductor laser;
the laser gain medium 14 includes: nd, YAG laser crystal.
The miniature micro-focus excitation light source device for the light and small TOF mass spectrometer provided by the invention has the following advantages:
1. the lens clamping seat 15 is movably connected to the laser component adjusting seat 17, and provides a certain focal length adjusting distance for the lens group 13 by moving back and forth when being fixed with the laser component adjusting seat 17;
2. after the laser component adjusting seat 17 is fixed in the metal shell 11, except for the position of the fixed supporting lugs 171, the rest positions of the laser component adjusting seat 17 are not thermally conducted with the metal shell 11, and the supporting lugs 171 are not contacted with the semiconductor refrigerator 18, so that the heat insulation property between the laser component adjusting seat 17 and the metal shell 11 is ensured, and the rest positions of the laser component adjusting seat 17 are attached to the semiconductor refrigerator 18TEC to ensure the heat conduction efficiency between the two;
3. the pressing buckle 16 clamps the laser gain medium 14 to the laser component adjusting seat 17, so that heat conduction between the laser gain medium 14 and the laser component adjusting seat 17 is ensured, and cooling or heating of the laser gain medium 14 is facilitated; the press buckle 16 and the laser component adjusting seat 17 are made of brass, so that the heat conduction efficiency is high, and the temperature of the laser gain medium 14 can be quickly adjusted; the laser gain medium 14 is covered by the press button 16 and the laser component adjusting seat 17, so that the area of the laser gain medium 14 for heat conduction is fully increased, and the metal indium foil is arranged between the press button 16 and the contact surface of the laser component adjusting seat 17 and the laser gain medium 14 to fully exchange heat, so that the heat conduction efficiency is further improved, and the temperature adjustment of the laser gain medium 14 is accelerated;
4. when the device needs to dissipate heat, as the lens group 13 is a part which does not need to dissipate heat, the laser component adjusting seat 17 is provided with the first boss through groove 174 at the corresponding position of the lens clamping seat 15, so that the contact area with the lens clamping seat 15 is reduced, and the manufacturing material of the lens clamping seat 15 is polyimide with good heat insulation, so that the lens group 13 is insulated from the laser component adjusting seat 17 through the lens clamping seat 15, and the heat dissipation power consumption of the laser component adjusting seat 17 is reduced;
5. the shell 11 is made of aluminum alloy, so that the light weight is realized while enough structural support and protection are provided for the operation of an internal laser, and the resource constraint requirement of deep space exploration is met;
7. the focusing assembly 22 is provided with a slot 223 in which the power adjuster 21 is placed, so that an operator can conveniently adjust the angle of the power adjuster 21 from the outside and can conveniently replace the power adjuster 21 as required while continuously adjusting the output light rate of the laser.
8. The miniature micro-focus excitation light source device for the light and small TOF mass spectrometer is a miniature micro-focus excitation light source, the output pulse width is as low as picosecond, the single pulse energy can reach tens of micro-focus, the whole size is about 45 multiplied by 20mm < 3 >, the miniature micro-focus excitation light source can adjust focal length, focal spot size and output laser power according to the requirement, and the miniature micro-focus excitation light source device has wide application prospect in the fields of deep space detection, mass analysis and the like.
Drawings
FIG. 1 shows a perspective view of an assembled micro-microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer, according to an exemplary embodiment of the invention;
FIG. 2 shows a schematic diagram of the partial components of a miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer, according to an exemplary embodiment of the invention;
fig. 3 is a perspective view showing a structure in which the micro laser 1 of fig. 2 is assembled;
fig. 4 shows a perspective view of the laser module adjusting socket 17 of the micro laser 1 in fig. 2;
fig. 5 shows a perspective view of the press button 16 of the micro laser 1 in fig. 2;
fig. 6 shows a perspective view of the lens mount of the micro laser 1 of fig. 2;
fig. 7 shows a perspective view of the energy conditioning and focusing system 2 of fig. 2.
Drawing reference numerals
1. Micro laser 2, energy conditioning and focusing system 11, housing
12. Optical pumping source 13, lens group 14 and laser gain medium
15. Lens cassette 16, press button 17 and laser component adjusting seat
18. Semiconductor refrigerator 19, thermistor 21, and power conditioner
22. Focusing assembly 151, lens holder first through groove 152, lens holder second through groove
161. Pressing the first through hole 162, pressing the second through hole 171, and supporting lugs
172. Second boss 173, first boss 174, first boss through groove
175. Third boss 176, circular slot 181 first opening
182. A second opening 221, a first pair of interfaces 222, and a second pair of interfaces
223. Slot groove
Detailed Description
The technical scheme provided by the invention is further described below by combining with the embodiment.
The invention aims to meet the requirements of the fields of deep space detection, mass analysis and the like on a light and small TOF mass spectrometer, realize the design of miniaturization, high efficiency and reliability of an excitation light source, and provide a miniature micro-focus excitation light source device for the light and small TOF mass spectrometer, which has the advantages of compact structure, low power consumption, high frequency, high pulse power and convenient debugging and installation.
Example 1
The micro-micro focus excitation light source device for a light-weight and small-sized TOF mass spectrometer provided in this embodiment mainly includes a micro laser 1 and an energy adjustment and focusing system 2, wherein the micro laser 1 includes an optical pump source 12, a laser gain medium 14, a lens group 13, and a fixing and adjusting structure, and the energy adjustment and focusing system 2 includes a power adjuster 21 and a focusing assembly 22. In the micro laser 1 part, the main functions of the optical pumping source 12 are electronic excitation and energy injection, and the laser output can be modulated by adjusting the input current of the optical pumping source 12; the optical pump source 12 provides energy to excite electrons in the laser gain medium 14, transitioning them from the ground state to an excited state, thereby generating laser radiation, and in particular, the laser beam of the optical pump source 12 propagates through the lens group 13 to the laser gain medium 14, recombining electrons with holes therein and releasing photons; these photons interact with other excited state particles and generate stimulated radiation in the laser cavity, thereby triggering the lasing action and generating a laser beam with higher power, so as to achieve the purpose of amplifying laser output. The optical pump source 12 generally employs a semiconductor Laser (LD) as the optical pump source 12; therefore, the laser gain medium 14 amplifies the laser light output from the optical pumping source 12 focused by the lens group 13, and accumulates the gain of the signal when the laser light passes through, thereby making the laser light output of higher power.
A Nd: YAG laser crystal is generally used as the laser gain medium 14; the lens group 13 mainly relates to functions of beam control and optical focusing; the fixing and adjusting structure comprises: the laser component adjusting seat 17 is a rectangular plate made of materials with good heat conduction performance and mechanical performance; the lens clamping seat 15 is a round groove made of a material with good heat insulation performance; the crystal press button 16 is made of a material with good heat conduction performance and mechanical performance; the shell 11, the shell 11 adopts a metal shell 11, is a hexahedral cuboid shell and is assembled on the outermost layer of the whole structure; in addition, this part also requires a semiconductor cooler (TEC) 18 and a negative temperature coefficient thermistor (NTC) 19 to ensure the temperature requirements of the laser when operating. In the energy adjustment and focusing system 2 part, the power adjuster 21 is used for continuously adjusting the output power of laser, and the focusing assembly 22 is used for adjusting the focal length and focal spot size of the excitation light source and realizing micro-focus laser output.
Preferably, the laser assembly adjusting seat 17 is provided with three platforms for respectively placing the optical pump source 12, the laser gain medium 14 and the lens group 13 according to the distance requirement. The distance between the stages depends on the focal length of the lens group 13, and the different heights of the stages are used to ensure that the beams are concentric coaxially in cooperation with the heights of the elements. Leaving threaded holes in each land for securing the element.
Preferably, the fixing and adjusting structure is provided with a temperature adjusting device, a round groove is reserved below the front end platform of the laser component adjusting seat 17 and used for placing a negative temperature coefficient thermistor 19 to monitor the working temperature of the laser, and the working condition of the semiconductor refrigerator 18 is adjusted according to the feedback value.
Preferably, the middle part of the laser component adjusting seat 17 is provided with a through groove for placing the lens clamping seat 15, so that the bottom surface of the lens clamping seat 15 is higher than the bottom surface of the laser component adjusting seat 17. Since the lens group 13 is an element that does not require heat dissipation during laser operation, it is isolated from the heat-conducting medium to reduce heat dissipation power consumption.
Preferably, the lens holder 15 has an internal thread at one end for fixing the lens group 13. The two sides are provided with through grooves, the through grooves can be fixed with the fixed adjusting seat through screws, and the moving distance is reserved by the through grooves, so that the low mass center can be adjusted in a large range.
Preferably, the crystal press buckle 16 is provided with a through hole, and is matched with the laser component adjusting seat 17 through a screw. The laser gain medium 14 can be tightly fixed between the bottom plate and the press buckle in a buckling manner, so that the contact area is increased, and good heat conduction is facilitated.
Preferably, four corners of the laser component adjusting seat 17 extend outwards to form through holes for being connected and fixed with threaded holes in the metal shell 11, and the radiating area can be reduced in an epitaxial mode.
Preferably, the metal shell 11 has a rectangular recess in the bottom for placement of the semiconductor refrigerator 18. The height of the rectangular groove is smaller than the thickness of the semiconductor refrigerator 18, so that after the laser component adjusting seat 17 is matched with the metal shell 11, the lower surface of the laser component adjusting seat 17 is contacted with the surface of the semiconductor refrigerator 18 but not contacted with the bottom surface of the metal shell 11 except for through holes extending outwards from four corners, and uniform refrigeration is realized.
Preferably, the left side and the right side of the metal shell 11 are respectively provided with a connector slot and an extension lens opening, and the inside is hollow, so that the structural quality is reduced as much as possible. The extension lens port has standard internal threads for interfacing with the optical focusing system.
Preferably, the optical focusing system has standard external threads on one side for interfacing with the micro laser 1 and standard internal threads on the other side for interfacing with an optical sleeve or a subsequent focusing system. The optical focusing system can be internally provided with an optical lens with standard size, and can be expanded and prolonged as required to realize the adjustment of focal length and focal spot size.
Preferably, a recess is provided in the middle of the optical focusing system, which can be used to assemble the power adjuster 21, typically by selecting a filter or a combination of half-wave plates and polarizing crystals, to facilitate continuous adjustment of the laser output power.
The technical scheme of the embodiment is further specifically described below through the embodiment and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.
Fig. 1 shows a perspective view of an assembled micro-micro focus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to an exemplary embodiment of the present invention. The micro laser 1 is a light source excitation device, and the energy adjusting and focusing system 2 has the functions of adjusting the focal length, focal spot size and laser intensity of the light source, and the two are assembled and collimated through matched threads.
Fig. 2 shows a schematic diagram of the partial components of a micro focus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to an exemplary embodiment of the present invention. The micro laser 1 comprises an optical pumping source 12, a lens group 13, a laser gain medium 14 and a fixing and adjusting structure, wherein the fixing and adjusting structure comprises a metal shell 11, is well grounded and dampproof and isolated, and ensures the stability of the internal working environment of the laser; the lens clamping seat 15 is used for fixing the lens group 13, one end of the lens clamping seat is provided with standard internal threads which can be matched and fixed with the lens group 13, so that the light path level of the lens group 13 is ensured, and the lens clamping seat can be fixedly connected with the bottom plate through screws penetrating through the through grooves; the crystal pressing buckle 16 is used for fixing the laser gain medium 14, pressing the laser gain medium 14 on a structure through a screw, and can place a metal indium foil with good extensibility and heat conduction performance on a contact area to increase heat conduction efficiency, and perform homogenization refrigeration on the laser gain medium 14; the laser component adjusting seat 17 is used for assembling the optical pumping source 12, the laser gain medium 14 and the lens group 13, realizing light path collimation and providing a heat conducting medium; a semiconductor cooler (TEC) 18 and a negative temperature coefficient thermistor (NTC) 19 are used to make up the temperature regulating device to maintain the micro laser 1 operating in a specified temperature environment. The energy conditioning and focusing system 2 includes, in part, a power conditioner 21 and a focusing assembly 22.
In the embodiment of the present embodiment, the material of the metal housing 11 may be an aluminum alloy housing, which provides sufficient structural support and protection for the internal laser operation under light weight conditions. The crystal press button 16 and the laser component adjusting seat 17 can be made of brass, have excellent heat conductivity and are beneficial to heat conduction; the material of the lens holder 15 may be polyimide, which has good thermal stability and can be used for heat insulation.
Fig. 3 shows an external structural view of the micro laser 1 in fig. 2 after assembly. As shown in the figure, the metal housing 11 may be configured as a cubic frame, enclosing to form a bottom surface and two opposite sides, and the top cover is engaged with the bottom surface by screws, and a main structure for the micro laser 1 to work is placed in the enclosed space. A cuboid groove is reserved in the metal shell 11 and is used for placing a semiconductor refrigerator (TEC) 18, the height of the groove is smaller than that of the semiconductor refrigerator 18, so that after the laser component adjusting seat 17 is fixed in the metal shell 11, except for the fixing position, namely, except for the position of a supporting lug 171 for fixing, the rest lower surface of the laser component adjusting seat 17 is not contacted with the bottom surface of the metal shell 11, and only contacted with the semiconductor refrigerator 18, thereby ensuring the heat conduction efficiency; in addition, a second opening 182 is formed on the right side of the metal shell 11, and is used as a connector notch, and the size and the shape of the connector notch are set according to actual requirements and are used for communicating with an upper computer and supplying power; the left side of the metal shell 11 is provided with a first opening 181 serving as a lens opening for emitting light, and the assembled internal threads can be matched with a clamping ring to fix the light emitting lens on one hand and can be connected with the energy adjusting and focusing system 2 on the other hand.
Fig. 4 shows a perspective view of the laser module adjusting socket 17 of the micro laser 1 in fig. 2. The third boss 175 is a rectangular boss for placing the optical pump source 12, and a circular groove 176 is arranged below for placing a negative temperature coefficient thermistor (NTC) 19 to collect the system temperature; the first boss 173 is a rectangular boss and is used for placing the lens card holder 15, and a rectangular first boss through groove 174 is formed in the side surface and is used for isolating the lens card holder 15 and the laser component adjusting seat 17, so that heat dissipation power consumption is reduced; the second boss 172 is a trapezoidal boss for placing the laser gain medium 14.
Fig. 5 shows a perspective view of the crystal press 16 of the micro laser 1 in fig. 2. Because the laser gain medium 14 can generate heat and the temperature rise can seriously affect the performance when in operation, the connecting screws of the first pressing through hole 161 and the second pressing through hole 162 can enable the laser gain medium 14 to be respectively and tightly attached to the pressing buckle 16 and the laser component adjusting seat 17, the shape of the pressing buckle 16 is symmetrical with the second boss 172, the pressing buckle 16 and the laser component adjusting seat 17 tightly cover the non-working surface of the laser gain medium 14 together, the working surface of the laser gain medium 14 is the surface for receiving light and emitting light, and the non-working surface is all other surfaces. The structure enables the laser gain medium 14 to be in large-area contact with the fixing and adjusting structure, and the metal indium foil with good extensibility and heat conduction performance can be placed on the contact area to increase the heat conduction efficiency, so that the metal indium foil can fully exchange heat with the structure, and the temperature stability is kept by matching with the temperature adjusting device.
Fig. 6 shows a perspective view of a lens holder 15 of the micro laser 1 in fig. 2, where a first through groove 151 of the lens holder and a second through groove 152 of the lens holder are respectively provided with a certain length, and can move back and forth when being fixed with a laser assembly adjusting seat 17 by a screw, so as to provide a certain focal length adjusting distance for a lens group 13; the lens opening 153 is provided with internal threads matched with the selected lens group 13, and is used for fixing the lens group 13, so that the center of the lens group 13 is on a set horizontal line, and the position of the lens group 13 can be conveniently adjusted by matching with the through groove.
Fig. 7 shows a perspective view of the energy conditioning and focusing system 2 of fig. 2. The energy adjusting and focusing system 2 is a cylinder with a length of 28mm and a diameter of 16mm, the first pair of interfaces 221 is used for being in butt joint with a laser light outlet, namely the first opening 181 of the shell 11, the second pair of interfaces 222 can be in butt joint with an optical sleeve or a subsequent optical focusing system, and a standard-size focusing lens can be installed in each group of optical focusing systems according to requirements, so that adjustment of focal length and focal spot size is realized. A slot 223 is provided in the optical focusing system and a power adjuster 21 may be placed, typically selecting a filter or a combination of half-wave plates and polarizing crystals to achieve adjustment of the laser output power.
According to the description, the embodiment of the invention provides the miniature micro-focus excitation light source device which is light and small, low in power consumption and easy to assemble and adjust and is used for the light and small TOF mass spectrometer, compared with the prior art, the miniature micro-focus excitation light source device is more economical, more convenient, more stable and more efficient, and is suitable for being assembled into the light and small TOF mass spectrometer to meet the application in the fields of deep space detection, mass analysis and the like.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (10)
1. A miniature microfocus excitation light source apparatus for a lightweight miniaturized TOF mass spectrometer, the excitation light source apparatus comprising: a laser (1) and an energy conditioning and focusing system (2); wherein the laser (1) comprises: the laser comprises an optical pumping source (12), a lens group (13), a laser gain medium (14) and a fixing and adjusting structure; wherein,
the optical pumping source (12) is used for modulating laser and outputting;
the lens group (13) is used for receiving the laser output by the optical pumping source (12) and performing beam control and optical focusing treatment on the laser;
the laser gain medium (14) is used for receiving and amplifying the laser processed by the lens group (13), enabling the gain of the accumulated signal when the laser passes to become higher-power laser, and taking the higher-power laser as output laser of the laser (1);
the energy adjusting and focusing system (2) is used for adjusting the focal length and focal spot size of the output laser of the laser (1), continuously adjusting the power of the output laser of the laser (1) and outputting the adjusted laser to a target to be detected of the TOF mass spectrometer;
the fixing and adjusting structure is used for aligning and assembling the optical pumping source (12), the lens group (13), the laser gain medium (14) and the energy adjusting and focusing system (2); is used for adjusting the distance between the lens group (13) and the laser gain medium (14) based on the focal length of the lens group (13), and is also used for controlling the temperature of the optical pumping source (12) and the laser gain medium (14).
2. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer of claim 1, wherein the fixing and adjusting structure comprises:
the shell (11), the said shell (11) is hollow structure, its bottom has grooves;
a semiconductor refrigerator (18), the semiconductor refrigerator (18) being disposed within the recess and having a height greater than the height of the recess;
a laser component adjusting seat (17), wherein the laser component adjusting seat (17) is fixedly connected to the shell (11), and the lower surface of the laser component adjusting seat is attached to the upper surface of the semiconductor refrigerator (18);
a lens clamping seat (15), wherein the lens clamping seat (15) is movably connected to the laser component adjusting seat (17) and is attached to the upper surface of the laser component adjusting seat (17) for installing the lens group (13);
-a press-button (16), the press-button (16) being selectively connectable to the laser assembly adjustment seat (17) for clamping the laser gain medium (14) to the laser assembly adjustment seat (17); and
the thermistor (19) is arranged in the laser component adjusting seat (17) and is used for monitoring the temperature of the laser component adjusting seat (17) and adjusting the working temperature of the semiconductor refrigerator (18) according to the feedback value of the temperature;
the optical pumping source (12) is mounted to the laser component adjusting seat (17) and is attached to the upper surface of the laser component adjusting seat (17);
the energy conditioning and focusing system (2) is mounted to a housing (11).
3. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to claim 2, characterized in that the projected shapes of the housing (11), semiconductor refrigerator (18) and laser assembly adjustment seat (17) are all rectangular; wherein,
the laser assembly adjusting seat (17) covers the semiconductor refrigerator (18);
the laser assembly adjusting seat (17) is mounted inside the housing (11) by four lugs (171) respectively connected to the vicinity of the four outer corners thereof, wherein the lugs (171) are not in contact with the semiconductor refrigerator (18) so as to reduce heat conduction between the laser assembly adjusting seat (17) and the housing (11).
4. The miniature micro-focus excitation light source device for a light and small TOF mass spectrometer according to claim 2, wherein the laser component adjusting seat (17) is provided with first bosses (173) at corresponding positions at two ends of the lens card seat (15), and a first boss through groove (174) is provided between the two first bosses (173) for reducing the contact area between the lens card seat (15) and the laser component adjusting seat (17) so as to reduce the heat dissipation power consumption of the laser component adjusting seat (17).
5. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to claim 2, wherein the laser assembly adjustment seat (17) is provided with a second boss (172) at a position corresponding to the press-button (16) for placing the laser gain medium (14); wherein,
the second boss (172) is a trapezoid boss and is used for increasing the contact area between the laser gain medium (14) and the laser component adjusting seat (17) so as to improve heat conduction between the laser gain medium and the laser component adjusting seat;
the shape of the press buckle (16) is symmetrical to the second boss (172) and is used for clamping the laser gain medium (14) to the second boss (172) and cladding the non-working surface of the laser gain medium (14) together with the second boss (172).
6. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer of claim 5, wherein a metallic indium foil is further disposed between the second boss (172) and the laser gain medium (14) to increase thermal conductivity between the laser gain medium (14) and the laser assembly tuning block (17).
7. A miniature micro focus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to claim 2, characterized in that the lens holder (15) is provided with a lens opening (153) for mounting the lens group (13);
the two ends of the lens clamping seat (15) are respectively provided with a strip-shaped first through groove (151) of the lens clamping seat and a strip-shaped second through groove (152) of the lens clamping seat in the direction perpendicular to the laser component adjusting seat (17); the first through groove (151) of the lens clamping seat and the second through groove (152) of the lens clamping seat are parallel to a collimation light path between the lens group (13) and the laser gain medium (14);
the lens clamping seat (15) is movably connected to the laser component adjusting seat (17) through a first through groove (151) of the lens clamping seat and a second through groove (152) of the lens clamping seat so as to adjust the distance between the lens group (13) and the laser gain medium (14).
8. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to claim 2, wherein the energy conditioning and focusing system (2) comprises:
a power adjuster (21) for continuously adjusting the power of the output laser light of the laser (1); and
-a focusing assembly (22), the focusing assembly (22) being adapted to adjust a focal length and a focal spot size of an output laser light of the laser (1); -the focusing assembly (22) is provided with a slot (223) for placing the power adjuster (21) to adjust the angle of the power adjuster (21);
the housing (11) is provided with:
-a first opening (181) for mounting the focusing assembly (22), such that the focusing assembly (22) is assembled in alignment with the laser gain medium (14);
the second opening is used for connecting with an upper computer.
9. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer as set forth in claim 2,
the shell (11) is made of aluminum alloy and is used for reducing the weight of the shell (11);
the pressing buckle (16) and the laser component adjusting seat (17) are made of brass and are used for guaranteeing heat conductivity;
the lens clamping seat (15) is made of polyimide and is used for guaranteeing heat insulation.
10. The miniature microfocus excitation light source device for a lightweight miniaturized TOF mass spectrometer according to claim 2, wherein the power regulator (21) comprises: a combination of half wave plate and polarizing crystal or an optical filter;
the optical pumping source (12) comprises: a semiconductor laser;
the laser gain medium (14) includes: nd, YAG laser crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311383142.6A CN117577505A (en) | 2023-10-24 | 2023-10-24 | Micro focus excitation light source device for light and small TOF mass spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311383142.6A CN117577505A (en) | 2023-10-24 | 2023-10-24 | Micro focus excitation light source device for light and small TOF mass spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117577505A true CN117577505A (en) | 2024-02-20 |
Family
ID=89890715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311383142.6A Pending CN117577505A (en) | 2023-10-24 | 2023-10-24 | Micro focus excitation light source device for light and small TOF mass spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117577505A (en) |
-
2023
- 2023-10-24 CN CN202311383142.6A patent/CN117577505A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11848531B2 (en) | Compact mode-locked laser module | |
| KR100272193B1 (en) | Solid-state laser pumped with a semiconductor laser | |
| CA2089615C (en) | Laser light beam generating apparatus | |
| US5140607A (en) | Side-pumped laser with angled diode pumps | |
| US20120210589A1 (en) | Quantum cascade laser suitable for portable applications | |
| US5561684A (en) | Laser diode pumped solid state laser construction | |
| US7949022B2 (en) | Diode pumping of a laser gain medium | |
| FI115872B (en) | Method and apparatus for temperature control of an optoelectronic semiconductor component | |
| CN113471809B (en) | Tunable cat eye laser and adjusting method | |
| CN117577505A (en) | Micro focus excitation light source device for light and small TOF mass spectrometer | |
| WO2011154405A1 (en) | A tunable laser system | |
| JP3398967B2 (en) | Laser light generator | |
| EP1090445B1 (en) | Scalable vertically diode-pumped solid-state lasers | |
| EP0798826A2 (en) | Photoexcitation solid-state laser or amplifier and photoexcitation method | |
| CN216286754U (en) | Distributed ion trap system | |
| CN114361916B (en) | Heat sink structural part for laser and laser with heat sink structural part | |
| CN115719910A (en) | Terahertz radiation source system | |
| JP2006147987A (en) | Laser oscillator | |
| JPH09293919A (en) | Holding structure of optical components and semiconductor laser exciting solid state laser device | |
| CN108767652B (en) | Semiconductor laser integrated structure | |
| CN113889832A (en) | Passive Q-switched laser of pumping | |
| Kangara | Design and construction of tapered amplifier systems for laser cooling and atom trapping experiments | |
| EP0847114A1 (en) | Solid-state laser apparatus | |
| JPH0731494Y2 (en) | High frequency inductively coupled plasma mass spectrometer | |
| CN116759882A (en) | Multi-wavelength Raman laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |