WO2023182954A1 - Novelty in a laser pumping chamber assembly - Google Patents
Novelty in a laser pumping chamber assembly Download PDFInfo
- Publication number
- WO2023182954A1 WO2023182954A1 PCT/TR2022/050315 TR2022050315W WO2023182954A1 WO 2023182954 A1 WO2023182954 A1 WO 2023182954A1 TR 2022050315 W TR2022050315 W TR 2022050315W WO 2023182954 A1 WO2023182954 A1 WO 2023182954A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laser
- pumping chamber
- laser crystal
- reflector
- flash lamps
- Prior art date
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 28
- 239000013078 crystal Substances 0.000 claims abstract description 34
- 239000011521 glass Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract description 8
- 239000002826 coolant Substances 0.000 abstract description 7
- 230000005923 long-lasting effect Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000005855 radiation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
- H01S3/092—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp
- H01S3/093—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp focusing or directing the excitation energy into the active medium
-
- 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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state lasers
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/061—Crystal lasers or glass lasers with elliptical or circular cross-section and elongated shape, e.g. rod
-
- 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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
Definitions
- the present invention relates to a laser pumping chamber assembly that allows the use of a diffuse reflector surface instead of the model of medical laser devices that operates with dual elliptical glass reflector, especially laser epilation devices.
- the reflective surface stimulates the laser crystal homogeneously by reflecting diffusely, hot spots are prevented in the obtained laser light, the other optical mirrors found after the laser crystal and the laser pumping chamber in the system are long-lasting.
- the reflective surface does not come into contact with the liquid. Since the reaction with the liquid and the heat trap are at a minimum level, the reflector is long-lasting. Since the coolant flow from the laser pumping chamber is unidirectional, the circulation pump has a longer life because a curved structure that will create counter pressure is eliminated.
- the overall efficiency of the laser system is defined as the ratio of the output energy of the laser beam to the input energy of the pumping source.
- a reflective surface is used in a laser pumping chamber so as to maximize the efficiency of a solid-state laser pumped with a flash lamp.
- the reflective surface concentrates the light output from the flash lamp source onto the laser crystal rod. Homogeneous light distribution of the reflective surface is required so as to illuminate the laser crystal rod homogeneously and to eliminate the hot spots in the laser beam. Undesirable fluctuations and roughness occur on the surface due to production in dual elliptical glass reflectors coated with silver and protective metal on the glass.
- the surface is exposed to solarization by the accumulation of the heating energy of the light coming out of the flash lamp thereon, while the metal-coated reflector on the glass works in coolant at approximately 50°C.
- the device cools down to ambient temperature when not in use. Cracks occur in the metal coating and the glass reflector may break from the tension accumulated on the reflector as a result of the heating and cooling phases, loosening occurs between the glass and metal coating due to the difficulty of adherence. As a result of these, the reflective surface deteriorates and darkening occurs. This situation disrupts the homogeneous light distribution falling on the laser crystal, and there is a reduction in the intensity of the reflected light. In this case, more excitation of a certain region of the laser crystal causes a decrease in power and the formation of hot spots in the laser light produced as a result of less excitation of some regions and the laser optics system suffers from these hot spots.
- Novelty in laser pumping chamber assembly realized to achieve the aims of the present invention is illustrated in the attached figures.
- Figure-1 is a perspective view of the inventive laser pumping chamber assembly.
- Figure-2 is a perspective view of the inventive laser pumping chamber assembly in an exploded state.
- the inventive laser pumping chamber assembly (1) comprising the following;
- Laser crystal (3) which, when excited by the light source, resonates with the optical mechanism at both ends and produces lasers
- Reflective surface (5) consisting of fluorescent reflective powder or ceramic reflective block
- Flash lamp flow tube (6) which filters the light coming out of the flash lamps and allows the cooling liquid to pass through it
- Body cover (8) which protects the fluorescent powder reflector or ceramic reflector from the external environment and prevents the light from the flash lamps from scattering to the environment
- Inlet adapter plate (9) that provides the connection and liquid isolation between the inlet plate (11) and the body (4),
- Outlet adapter plate (10) that provides the connection and liquid isolation between the outlet plate (12) and the body (4)
- Inlet plate (11) at one end of the body (4) which keeps the flash lamps (2) and the laser crystal (3) on the optical axis and allows the circulation of the cooling liquid
- Outlet plate (12) at the other one end of the body (4), which keeps the flash lamps (2) and the laser crystal (3) on the optical axis and allows the circulation of the cooling liquid.
- the reflective surface (5) does not come into contact with the coolant with the help of the geometric structure of the inventive laser pumping chamber assembly (1). Since the reaction with the liquid and the heat trap are at a minimum level, the reflector is long-lasting. Since the coolant flow from the laser pumping chamber (1) is unidirectional, the circulation pump has a longer life because a curved structure that will create counter pressure is eliminated. Ideally, it is desired that the radiation emitted from the flash lamp (2) and the absorption bands of the laser crystal (3) rod overlap. In this way, the thermal load on the laser crystalrod and the associated optical distortions are minimized.
- UV radiation which is an important part of the laser pump spectrum converts into useful longer wavelength radiation with this three-hole glass tube (7) and the flash lamp flow tube (6) surrounding the flash lamps (2). In this way, it increases the energy output of the laser or laser amplifier.
- the powder and ceramic reflector material provides diffuse reflection and ensures homogeneous illumination of the laser crystal (3). Therefore, undesirable hot spots are prevented in the laser light formed by the laser with a homogeneous distribution, and a homogeneous laser light is obtained.
- the geometric structure of the inventive laser pumping chamber assembly (1) provides easy assembly.
- the reflective powder is allowed to be filled and the reflective surface (5) is allowed to be changed by only opening the body cover (8).
- Improvements in the inventive laser pumping chamber assembly (1) is obtaining a homogeneous laser light free from hot spots as it provides homogeneous light collection on the laser crystal (3). Therefore, the power of the produced laser light increases and the power decrease is slower depending on the usage time.
- the service life of optical lenses increases since the damage to the optical materials in the laser system from hot spots is minimized with the homogeneous laser light. Thus, it offers the user an economical and efficient use.
- Fluorescent powder reflector and ceramic reflective materials used in the inventive laser pumping chamber assembly (1) can be produced more easily than the dual elliptical glass reflector material and since it is available, it provides a practical use to the user.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a laser pumping chamber (1) assembly that allows the use of a diffuse reflector surface instead of the model of medical laser devices that operates with dual elliptical glass reflector, especially laser epilation devices. The reflective surface (5) does not come into contact with the liquid. Since the reaction with the liquid and the heat trap are at a minimum level, the reflector is long‐lasting. Since the coolant flow from the laser pumping chamber (1) is unidirectional, the circulation pump has a longer life because a curved structure that will create counter pressure is eliminated. Since the reflective surface (5) stimulates the laser crystal (3) homogeneously by reflecting diffusely, hot spots are prevented in the obtained laser light, the other optical mirrors used after the laser crystal and the laser pumping chamber in the system are long - lasting.
Description
NOVELTY IN A LASER PUMPING CHAMBER ASSEMBLY
Field of the Invention
The present invention relates to a laser pumping chamber assembly that allows the use of a diffuse reflector surface instead of the model of medical laser devices that operates with dual elliptical glass reflector, especially laser epilation devices.
Since the reflective surface stimulates the laser crystal homogeneously by reflecting diffusely, hot spots are prevented in the obtained laser light, the other optical mirrors found after the laser crystal and the laser pumping chamber in the system are long-lasting. The reflective surface does not come into contact with the liquid. Since the reaction with the liquid and the heat trap are at a minimum level, the reflector is long-lasting. Since the coolant flow from the laser pumping chamber is unidirectional, the circulation pump has a longer life because a curved structure that will create counter pressure is eliminated.
Prior Art
Today, different models of medical laser devices are used for laser production as a result of excitation of various laser crystal rods with a flash lamp in the laser beam source that produces laser.
In the medical laser device of the state of the art, silver, gold and similar reflective metal on dual elliptical glass and a protective metal coated reflective surface (dual elliptical glass reflector) protecting them are used in the laser
pumping chamber. There are two flash lamps and a laser crystal rod at their focal point within this reflective cavity. The dual elliptical glass reflector concentrates the light output from the flash lamps on the laser crystal rod. In this way, as a result of the illumination of the laser crystal rod and the collection of light thereon, the laser crystal is excited and the environment is provided for the laser output at the appropriate wavelength of the crystal. Complete reflective surface, the dual elliptical glass reflector, the laser crystal rod, and the flash lamps operate in a coolant that cools the laser pumping chamber.
The overall efficiency of the laser system is defined as the ratio of the output energy of the laser beam to the input energy of the pumping source. A reflective surface is used in a laser pumping chamber so as to maximize the efficiency of a solid-state laser pumped with a flash lamp. The reflective surface concentrates the light output from the flash lamp source onto the laser crystal rod. Homogeneous light distribution of the reflective surface is required so as to illuminate the laser crystal rod homogeneously and to eliminate the hot spots in the laser beam. Undesirable fluctuations and roughness occur on the surface due to production in dual elliptical glass reflectors coated with silver and protective metal on the glass. Furthermore, the surface is exposed to solarization by the accumulation of the heating energy of the light coming out of the flash lamp thereon, while the metal-coated reflector on the glass works in coolant at approximately 50°C. The device cools down to ambient temperature when not in use. Cracks occur in the metal coating and the glass reflector may break from the tension accumulated on the reflector as a result of the heating and cooling phases, loosening occurs between the glass and metal coating due to the difficulty of adherence. As a result of these, the reflective surface deteriorates and darkening occurs. This situation disrupts the homogeneous light distribution falling on the laser crystal, and there is a reduction in the intensity of the reflected light. In this case, more excitation of a certain region of the laser crystal
causes a decrease in power and the formation of hot spots in the laser light produced as a result of less excitation of some regions and the laser optics system suffers from these hot spots.
Existing medical laser devices are insufficient for the user in terms of long-lasting and efficient use due to the reasons mentioned above.
Description of the Invention
Novelty in laser pumping chamber assembly realized to achieve the aims of the present invention is illustrated in the attached figures.
In these figures;
Figure-1 is a perspective view of the inventive laser pumping chamber assembly.
Figure-2 is a perspective view of the inventive laser pumping chamber assembly in an exploded state.
The parts that constitute the inventive laser pumping chamber assembly e are enumerated as follows in the attached figures:
1- Laser Pumping Chamber Assembly
2- Flash Lamp
3- Laser Crystal
4- Body
5- Reflective Surface
6- Flash Lamp Flow Tube
7- Three Hole Glass Tube
8- Body Cover
9- Inlet Adapter Plate
10- Outlet Adapter Plate
11- Inlet Plate
12- Outlet Plate
The inventive laser pumping chamber assembly (1) comprising the following;
- Two flash lamps (2) that provide excitation of the laser crystal as a light source,
Laser crystal (3), which, when excited by the light source, resonates with the optical mechanism at both ends and produces lasers,
Body (4) with fluorescent powder reflector or ceramic reflective material inside,
Reflective surface (5) consisting of fluorescent reflective powder or ceramic reflective block,
Flash lamp flow tube (6), which filters the light coming out of the flash lamps and allows the cooling liquid to pass through it,
- Three-hole glass tube (7), which allows cooling of the flash lamps and laser crystal with the cooling liquid flowing inside, while protecting the reflective surface outside from the contact of the cooling liquid,
Body cover (8), which protects the fluorescent powder reflector or ceramic reflector from the external environment and prevents the light from the flash lamps from scattering to the environment,
Inlet adapter plate (9) that provides the connection and liquid isolation between the inlet plate (11) and the body (4),
Outlet adapter plate (10) that provides the connection and liquid isolation between the outlet plate (12) and the body (4),
Inlet plate (11) at one end of the body (4), which keeps the flash lamps (2) and the laser crystal (3) on the optical axis and allows the circulation of the cooling liquid,
Outlet plate (12) at the other one end of the body (4), which keeps the flash lamps (2) and the laser crystal (3) on the optical axis and allows the circulation of the cooling liquid.
Inlet plate (11), outlet plate (12) and inlet adapter plate (9), outlet adapter plate (10) that provide liquid-tight mounting of laser crystal (3) and flash lamps (2) of the inventive laser pumping chamber assembly (1) to the system processed in accordance with the design and the liquid inlet and outlet of the laser pumping chamber (1) are cooled without direct contact with the reflective surface (5) around the laser pumping chamber (1) by direct contact with the laser crystal (3) and flash lamps (2) with flow in one direction and the service life of the circulation pump is extended in the design.
The reflective surface (5) does not come into contact with the coolant with the help of the geometric structure of the inventive laser pumping chamber assembly (1). Since the reaction with the liquid and the heat trap are at a minimum level, the reflector is long-lasting. Since the coolant flow from the laser pumping chamber (1) is unidirectional, the circulation pump has a longer life because a curved structure that will create counter pressure is eliminated.
Ideally, it is desired that the radiation emitted from the flash lamp (2) and the absorption bands of the laser crystal (3) rod overlap. In this way, the thermal load on the laser crystalrod and the associated optical distortions are minimized. Since the light emitted from the flash lamp (2) may cause solarization of the laser crystal (3) rod and deterioration of the liquid coolant used to cool the pump cavity, it is desirable to reduce the ultraviolet part of the flash lamp (2) radiation. Thus, a doped flash lamp flow tube (6) and three-hole glass tube (7) are used. Thus, a diffuse reflective laser pumping cavity that has the properties to convert light of an undesirable wavelength to a desired longer wavelength, while also increasing the spectral overlap between the flash lamp (2) and the laser crystal (3) materials provided. Undesired ultraviolet (UV) radiation which is an important part of the laser pump spectrum converts into useful longer wavelength radiation with this three-hole glass tube (7) and the flash lamp flow tube (6) surrounding the flash lamps (2). In this way, it increases the energy output of the laser or laser amplifier.
The powder and ceramic reflector material provides diffuse reflection and ensures homogeneous illumination of the laser crystal (3). Therefore, undesirable hot spots are prevented in the laser light formed by the laser with a homogeneous distribution, and a homogeneous laser light is obtained.
The geometric structure of the inventive laser pumping chamber assembly (1) provides easy assembly. The reflective powder is allowed to be filled and the reflective surface (5) is allowed to be changed by only opening the body cover (8).
Improvements in the inventive laser pumping chamber assembly (1) is obtaining a homogeneous laser light free from hot spots as it provides homogeneous light
collection on the laser crystal (3). Therefore, the power of the produced laser light increases and the power decrease is slower depending on the usage time.
The service life of optical lenses increases since the damage to the optical materials in the laser system from hot spots is minimized with the homogeneous laser light. Thus, it offers the user an economical and efficient use.
Since the light coming out of the flash lamps (2) is applied on the laser crystal (3) by filtering the same, undesired heating effect on the laser crystal (3) is removed, thus this extends its service life.
Fluorescent powder reflector and ceramic reflective materials used in the inventive laser pumping chamber assembly (1) can be produced more easily than the dual elliptical glass reflector material and since it is available, it provides a practical use to the user.
Claims
CLAIMS - Laser pumping chamber assembly (1) of the present invention comprising of two flash lamps (2) that provide excitation of the laser crystal as a light source, laser crystal (3), which, when excited by the light source, resonates with the optical mechanism at both ends and produces lasers, body (4) with fluorescent powder reflector or ceramic reflective material inside, reflective surface (5) consisting of fluorescent reflective powder or ceramic reflective block, flash lamp flow tube (6), which filters the light coming out of the flash lamps and allows the cooling liquid to pass through it, three-hole glass tube (7), which allows cooling of the flash lamps and laser crystal with the cooling liquid flowing inside, while protecting the reflective surface outside from the contact of the cooling liquid, body cover (8) which protects the fluorescent powder reflector or ceramic reflector from the external environment and prevents the light from the flash lamps from scattering to the environment and characterized in that the present invention comprises inlet adapter plate (9) that provides the connection and liquid isolation between the inlet plate (11) and the body (4), outlet adapter plate (10) that provides the connection and liquid isolation between the outlet plate (12) and the body (4), inlet plate (11) at one end of the body (4), which keeps the flash lamps (2) and the laser crystal (3) on the optical axis and allows the circulation of the cooling liquid, outlet plate (12) at the other one end of the body (4), which keeps the flash lamps (2) and the laser crystal (3) on the optical axis and allows the circulation of the cooling liquid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2022004590 | 2022-03-25 | ||
| TR2022/004590 | 2022-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023182954A1 true WO2023182954A1 (en) | 2023-09-28 |
Family
ID=88101935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2022/050315 WO2023182954A1 (en) | 2022-03-25 | 2022-04-11 | Novelty in a laser pumping chamber assembly |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2023182954A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012156435A (en) * | 2011-01-28 | 2012-08-16 | Toshiba Corp | Yag laser oscillation device |
| CN205282866U (en) * | 2015-12-18 | 2016-06-01 | 深圳市镭康机械设备有限公司 | Improve ceramic laser pumping cavity of structure |
| CN110224284A (en) * | 2019-06-12 | 2019-09-10 | 深港产学研基地（北京大学香港科技大学深圳研修院） | A kind of high reliability antidetonation small-sized YAG laser |
-
2022
- 2022-04-11 WO PCT/TR2022/050315 patent/WO2023182954A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012156435A (en) * | 2011-01-28 | 2012-08-16 | Toshiba Corp | Yag laser oscillation device |
| CN205282866U (en) * | 2015-12-18 | 2016-06-01 | 深圳市镭康机械设备有限公司 | Improve ceramic laser pumping cavity of structure |
| CN110224284A (en) * | 2019-06-12 | 2019-09-10 | 深港产学研基地（北京大学香港科技大学深圳研修院） | A kind of high reliability antidetonation small-sized YAG laser |
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