CN219535165U - Dual-wavelength self-frequency doubling device and treatment laser - Google Patents
Dual-wavelength self-frequency doubling device and treatment laser Download PDFInfo
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- CN219535165U CN219535165U CN202320396938.4U CN202320396938U CN219535165U CN 219535165 U CN219535165 U CN 219535165U CN 202320396938 U CN202320396938 U CN 202320396938U CN 219535165 U CN219535165 U CN 219535165U
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Abstract
The utility model relates to the technical field of laser systems, in particular to a dual-wavelength self-frequency doubling device and a treatment laser, which comprise a light source, a first self-frequency doubling crystal, a beam splitting part and a second self-frequency doubling crystal which are sequentially arranged on a light path, wherein the first self-frequency doubling crystal is used for converting initial light emitted by the light source into first fundamental frequency light and first frequency doubling light, the beam splitting part is used for separating the first fundamental frequency light from the first frequency doubling light and transmitting the first fundamental frequency light to the second self-frequency doubling crystal, and the second self-frequency doubling crystal is used for converting the first fundamental frequency light into second fundamental frequency light and second frequency doubling light.
Description
Technical Field
The utility model relates to the technical field of laser systems, in particular to a dual-wavelength self-frequency doubling device and a treatment laser.
Background
The current methods for treating malignant tumors include the following methods: surgery, radiation therapy, chemotherapy, targeted therapy, immunotherapy, and photodynamic therapy.
Photodynamic therapy belongs to a new technology of tumor minimally invasive therapy, and is different from other tumor therapy means, belongs to tumor selective therapy, and has the effects of retaining organ functions (such as tongue cancer laryngeal cancer can retain sound functions, cervical cancer can retain fertility functions) and beautifying (skin cancer does not need skin grafting). The early tumor can be radically cured by photodynamic therapy, and is more suitable for photodynamic therapy of patients with advanced tumors unsuitable for operation and radiotherapy or refractory tumor patients with recurrent after radiotherapy and chemotherapy.
The photodynamic therapy medicine for malignant tumor is photosensitizer, the photosensitizer with wider application range is campiposide (hematoporphyrin derivative), and the adaptation diseases of campiposide are numerous, such as laryngeal cancer, liver cancer, skin cancer and the like, and the photodynamic therapy medicine has 5 absorption peaks at 200nm-800nm, wherein the absorption at 504nm and 572nm is stronger.
At present, most of therapeutic apparatuses in the market are 630nm wavelength semiconductor therapeutic apparatuses, the wavelength is single, and the depth of the treated tissue is limited. The method for realizing 572nm yellow light laser at home and abroad mainly comprises the following steps: dual wavelength intracavity sum frequency, raman laser frequency doubling, optical pump semiconductor vertical external cavity surface emitting lasers, intracavity frequency doubling, and the like. However, the above technique has a problem in that the frequency conversion process is complicated.
Disclosure of Invention
In order to simplify the process of frequency conversion of light emitted by a light source, the utility model provides a dual-wavelength self-frequency doubling device and a treatment laser.
The utility model provides a dual-wavelength self-frequency doubling device and a treatment laser, which adopt the following technical scheme:
in a first aspect, the present utility model provides a dual-wavelength self-frequency doubling device, including a light source, a first self-frequency doubling crystal, a beam splitting part and a second self-frequency doubling crystal sequentially arranged on a light path, where the first self-frequency doubling crystal is configured to convert initial light emitted by the light source into first fundamental frequency light and first frequency doubling light, the beam splitting part is configured to split the first fundamental frequency light from the first frequency doubling light, and conduct the first fundamental frequency light to the second self-frequency doubling crystal, and the second self-frequency doubling crystal is configured to convert the first fundamental frequency light into second fundamental frequency light and second frequency doubling light.
By adopting the technical scheme, the initial light emitted by the light source enters the first self-frequency doubling crystal, the first fundamental frequency light is converted into the first fundamental frequency light through energy level transition, the first fundamental frequency light is converted into the first frequency doubling light through the first self-frequency doubling crystal in a nonlinear manner, the light splitting part separates the first fundamental frequency light from the first frequency doubling light, the first frequency doubling light is directly led out, the first fundamental frequency light is conducted to the second self-frequency doubling crystal, the second fundamental frequency light is converted into the second fundamental frequency light through energy level transition, and the second fundamental frequency light is converted into the second frequency doubling light through the second self-frequency doubling crystal in a nonlinear manner, so that the light frequency conversion process emitted by the light source is simplified.
Optionally, the first self-frequency doubling crystal incident surface is plated with an initial light high-transmittance film.
By adopting the technical scheme, the initial light high-transmittance film can reduce the reflection effect of the first self-frequency doubling crystal incident surface on the initial light, and reduce the loss of the initial light.
Optionally, the incident surface of the first self-frequency doubling crystal is plated with a first fundamental frequency light high-reflection film.
By adopting the technical scheme, the first fundamental frequency light high-reflection film can improve the reflection effect of the first self-frequency doubling crystal incident surface on the first fundamental frequency light and reduce the first fundamental frequency light escaping from the first self-frequency doubling crystal incident surface.
Optionally, the first self-frequency multiplication crystal incident surface is plated with a first frequency multiplication light high-reflection film.
By adopting the technical scheme, the first frequency doubling light high-reflection film can improve the reflection effect of the first self-frequency doubling crystal incident surface on the first frequency doubling light and reduce the first frequency doubling light escaping from the first self-frequency doubling crystal incident surface.
Optionally, the first self-frequency doubling crystal emergent surface is plated with an initial light high-reflection film.
By adopting the technical scheme, the initial light high-reflection film can improve the reflection effect of the first self-frequency doubling crystal emergent surface facing the initial light, so that the initial light can be more completely transited to the first fundamental frequency light.
Optionally, the outgoing surface of the first self-frequency doubling crystal is plated with a first fundamental frequency light high-permeability film.
By adopting the technical scheme, the first fundamental frequency light high-permeability film can reduce the reflection effect of the first self-frequency doubling crystal emergent face on the first fundamental frequency light and reduce the loss of the first fundamental frequency light.
Optionally, the first self-frequency multiplication crystal emergent surface is plated with a first frequency multiplication light high-transmission film.
By adopting the technical scheme, the first frequency doubling light high-permeability film can reduce the reflection effect of the first self-frequency doubling crystal emergent face on the first frequency doubling light and reduce the loss of the first frequency doubling light.
Optionally, the device further comprises a filtering part, wherein the filtering part is used for filtering the first fundamental frequency light and the second fundamental frequency light and guiding out the second frequency doubling light.
By adopting the technical scheme, the filtering part can filter out the first fundamental frequency light and the second fundamental frequency light emitted by the second self-frequency doubling crystal, only the second frequency doubling light is reserved, and the second frequency doubling light is led out.
Optionally, the optical filtering portion includes a first fundamental frequency light high reflection film plated on the second self-frequency doubling crystal exit surface.
By adopting the technical scheme, the first fundamental frequency light high-reflection film can improve the reflection effect of the second self-frequency doubling crystal emergent face on the first fundamental frequency light, and reduce the first fundamental frequency light emitted by the second self-frequency doubling crystal emergent face.
Optionally, the filtering portion includes a second fundamental frequency light high reflection film plated on the second self-frequency doubling crystal exit surface.
By adopting the technical scheme, the second fundamental frequency light high-reflection film can improve the reflection effect of the second self-frequency doubling crystal emergent face on the second fundamental frequency light, and reduce the second fundamental frequency light emitted from the second self-frequency doubling crystal emergent face.
Optionally, the incident surface of the second self-frequency doubling crystal is plated with a first fundamental frequency light high-permeability film.
By adopting the technical scheme, the first fundamental frequency light high-permeability film can reduce the reflection effect of the incidence surface of the second self-frequency doubling crystal on the first fundamental frequency light, and reduce the loss of the first fundamental frequency light.
Optionally, the incident surface of the second self-frequency doubling crystal is plated with a second fundamental frequency light high-reflection film.
By adopting the technical scheme, the second fundamental frequency light high-reflection film can improve the reflection effect of the second self-frequency doubling crystal incidence surface on the second fundamental frequency light, and reduce the second fundamental frequency light escaping from the second self-frequency doubling crystal incidence surface.
Optionally, the incident surface of the second self-frequency doubling crystal is plated with a second frequency doubling light high-reflection film.
By adopting the technical scheme, the second frequency doubling light high-reflection film can improve the reflection effect of the second self-frequency doubling crystal incidence surface on the second frequency doubling light and reduce the second frequency doubling light escaping from the second self-frequency doubling crystal incidence surface.
Optionally, the second self-frequency doubling crystal emergent surface is plated with a second frequency doubling light high-permeability film.
By adopting the technical scheme, the second frequency doubling light high-permeability film can reduce the reflection effect of the second self-frequency doubling crystal emergent face on the second frequency doubling light and reduce the loss of the second frequency doubling light.
Optionally, the beam splitting part includes a beam splitter, and the beam splitter is plated with a first frequency doubling light high reflection film and a first fundamental frequency light high transmission film.
By adopting the technical scheme, the first frequency doubling light high-reflection film can improve the reflection effect of the spectroscope on the first frequency doubling light, the first fundamental frequency light high-transmission film can reduce the reflection effect of the spectroscope on the first fundamental frequency light, most of the first frequency doubling light can be reflected on the spectroscope, and most of the first fundamental frequency light can be transmitted through the spectroscope, so that the effect of separating the first fundamental frequency light and the first frequency doubling light is realized.
Optionally, a first focusing lens is disposed between the light source and the first self-frequency doubling crystal.
By adopting the technical scheme, the first focusing lens can focus divergent initial light and conduct the divergent initial light into the first self-frequency doubling crystal.
Optionally, a second focusing lens is arranged between the light splitting part and the second self-frequency doubling crystal.
By adopting the technical scheme, the second focusing lens focuses the divergent first fundamental frequency light and transmits the first fundamental frequency light into the second self-frequency doubling crystal, so that the conversion efficiency is improved.
Optionally, the optical device further comprises a first light guide part and a second light guide part, wherein the first light guide part and the second light guide part are arranged on the optical path, the first light guide part is used for guiding out the first frequency doubling light, and the second light guide part is used for guiding out the second frequency doubling light.
By adopting the technical scheme, the loss when the first frequency doubling light is led out can be reduced by arranging the first light guide part, and the loss when the second frequency doubling light is led out can be reduced by arranging the second light guide part.
Optionally, a first coupling lens is disposed between the light splitting portion and the first light guiding portion.
By adopting the technical scheme, the first coupling lens can converge the first frequency multiplication light emitted by the light splitting part, so that the conversion efficiency is improved.
And a second coupling lens is arranged between the second self-frequency doubling crystal and the second light guide part.
By adopting the technical scheme, the second coupling lens can converge the second frequency multiplication light led out by the second self frequency multiplication crystal, and the conversion efficiency is improved.
And a reflective mirror is arranged between the light splitting part and the first light guiding part.
By adopting the technical scheme, the reflector can adjust the first frequency multiplication light emitted by the light splitting part to a required direction.
In a second aspect, the utility model also provides a therapeutic laser comprising a dual wavelength self-frequency doubling device as described above.
By adopting the technical scheme, when the dual-wavelength self-frequency doubling device is used, the treatment laser can emit treatment light with two wavelengths simultaneously.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the first self-frequency doubling crystal converts the initial light emitted by the light source into first fundamental frequency light and first frequency doubling light, the light splitting part splits the first fundamental frequency light from the first frequency doubling light, the first fundamental frequency light is led into the second self-frequency doubling crystal, the second self-frequency doubling crystal converts the first fundamental frequency light into second fundamental frequency light and second frequency doubling light, and finally the second self-frequency doubling crystal leads out the second frequency doubling light, so that the frequency conversion process of the light emitted by the light source is simplified;
2. the method comprises the steps of plating an initial light high-transmission film, a first fundamental frequency light high-reflection film and a first frequency doubling light high-reflection film on the incidence surface of a first self-frequency doubling crystal, plating the initial light high-reflection film, the first fundamental frequency light high-transmission film and the first frequency doubling light high-transmission film on the emergence surface of the first self-frequency doubling crystal, plating the first fundamental frequency light high-transmission film, a second fundamental frequency light high-reflection film and a second frequency doubling light high-reflection film on the incidence surface of a second self-frequency doubling crystal, and plating the second frequency doubling light high-transmission film, the first fundamental frequency light high-reflection film and the second fundamental frequency light high-reflection film on the emergence surface of the second self-frequency doubling crystal, so that the loss of light in a light path can be reduced, and the efficiency of initial light conversion is improved.
Drawings
Fig. 1 is a schematic structural diagram of a dual-wavelength self-frequency doubling device according to an embodiment of the present utility model.
Reference numerals illustrate: 1. a light source; 2. a first self-frequency doubling crystal; 3. a second self-frequency doubling crystal; 4. a beam splitter; 5. a first focusing lens; 6. a second focusing lens; 7. a first light guide portion; 8. a second light guide portion; 9. a first coupling lens; 10. a second coupling lens; 11. a reflective mirror.
Detailed Description
The technical solution in the embodiment of the present utility model will be clearly and completely described below with reference to fig. 1. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiment of the utility model discloses a dual-wavelength self-frequency doubling device and a treatment laser. The therapeutic laser can be a therapeutic laser of a tongue cancer therapeutic instrument, a laryngeal cancer therapeutic instrument, a cervical cancer therapeutic instrument, a skin cancer therapeutic instrument and the like.
Referring to fig. 1, the dual-wavelength self-frequency doubling device includes a light source 1, a first self-frequency doubling crystal 2, a beam splitting section, and a second self-frequency doubling crystal 3, which are sequentially arranged on an optical path.
After the initial light emitted by the light source 1 enters the first self-frequency doubling crystal 2, the doped ions in the first self-frequency doubling crystal 2 are excited, the energy level is changed to form first fundamental frequency light, and the first fundamental frequency light passes through the first self-frequency doubling crystal 2 to perform nonlinear frequency doubling conversion on the first frequency doubling light. In this embodiment, the light source 1 is a semiconductor laser diode LD, and according to the usage scenario, the light source 1 may be a fiber laser, a gas laser, a liquid laser, or the like in other embodiments.
In this embodiment, the incident surface of the first self-frequency doubling crystal 2 is coated with an initial light high-transmission film, a first fundamental frequency light high-reflection film and a first frequency doubling light high-reflection film, and the emergent surface of the first self-frequency doubling crystal 2 is coated with an initial light high-reflection film, a first fundamental frequency light high-transmission film and a first frequency doubling light high-transmission film. So set up, reduce the reflection of initial light at the incident surface, make most initial light get into first from frequency doubling crystal 2, and can not follow first from frequency doubling crystal 2 exit face escape, still promoted first fundamental frequency light and first frequency doubling light all at the transmissivity of exit face, promoted the conversion effect of first from frequency doubling crystal 2.
In other embodiments, the incident surface and the exit surface of the first self-frequency doubling crystal 2 may not be coated with the initial light high-transmittance film, the first fundamental frequency light high-reflection film, and the first frequency doubling light high-reflection film, or only some of them may be coated with the first self-frequency doubling crystal.
Referring to fig. 1, the beam splitter splits the first fundamental frequency light output from the frequency doubling crystal 2 from the first frequency doubling light. In this embodiment, the beam splitting section is a beam splitter 4 coated with a first frequency doubling light high reflection film and a first fundamental frequency light high transmission film, when the first fundamental frequency light and the first frequency doubling light output by the first self-frequency doubling crystal 2 are transmitted to the beam splitter 4, the first frequency doubling light is reflected by the first frequency doubling light high reflection film, and the first fundamental frequency light can pass through the beam splitter 4 through the first fundamental frequency light high transmission film, so as to separate the first fundamental frequency light and the first frequency doubling light. In other embodiments, the beam splitting part may be a prism, a cone mirror, a lens group, or the like according to different usage scenarios.
Referring to fig. 1, the beam splitting section transmits the first fundamental frequency light to the second self-frequency doubling crystal 3, and after the first fundamental frequency light enters the second self-frequency doubling crystal 3, ions doped in the second self-frequency doubling crystal 3 are excited, energy level transitions to form second fundamental frequency light, and the second fundamental frequency light is converted into second frequency doubling light through nonlinear frequency doubling of the second self-frequency doubling crystal 3.
In this embodiment, the incident surface of the second self-frequency doubling crystal 3 is coated with a first fundamental frequency light high-transmission film, a second fundamental frequency light high-reflection film and a second frequency doubling light high-reflection film, and the emergent surface of the second self-frequency doubling crystal 3 is coated with a second frequency doubling light high-transmission film. By the arrangement, the reflection of the first fundamental frequency light on the incident surface can be reduced, so that most of the first fundamental frequency light enters the second self-frequency doubling crystal 3; the second fundamental frequency light and the second frequency doubling light can not escape from the incident surface of the second self-frequency doubling crystal 3, the transmittance of the second frequency doubling light on the emergent surface is improved, and the conversion effect of the second self-frequency doubling crystal 3 is improved.
In other embodiments, the incident surface and the emergent surface of the second self-frequency doubling crystal 3 may not be coated with the first fundamental frequency light high-transmittance film, the second fundamental frequency light high-reflection film and the second frequency doubling light high-reflection film, or only a part of the films thereof may be coated.
The second self-frequency doubling crystal 3 is also provided with a light filtering part, and the light filtering part comprises a first fundamental frequency light high-reflection film and a second fundamental frequency light high-reflection film which are plated on the emergent surface of the second self-frequency doubling crystal 3. By the arrangement, the light emitted by the second self-frequency doubling crystal 3 can be filtered to be second frequency doubling light, so that the treatment effect of the output light is improved. In other embodiments, the filtering portion may be a beam splitter, a cone mirror, or a prism according to different usage scenarios.
Referring to fig. 1, a first focusing lens 5 is disposed between a light source 1 and a first self-frequency doubling crystal 2, and a second focusing lens 6 is disposed between a light splitting section and a second self-frequency doubling crystal 3. The first focusing lens 5 can focus the divergent initial light, so that the conversion efficiency of the first self-frequency doubling crystal 2 is improved; the second focusing lens 6 can focus the divergent first fundamental frequency light, so as to improve the conversion efficiency of the second self-frequency doubling crystal 3.
Referring to fig. 1, the optical path is further provided with a first light guide portion 7 and a second light guide portion 8, where the first light guide portion 7 can guide the first frequency-doubled light to a desired place; the second light guide 8 can guide the second frequency-doubled light to a desired place. In this embodiment, the first light guiding portion 7 and the second light guiding portion 8 are optical fibers, and the first light guiding portion 7 and the second light guiding portion 8 may be lenses or mirror groups according to different usage scenarios.
Referring to fig. 1, a reflective mirror 11 is disposed between the beam splitter and the first light guide 7, and when the beam splitter 4 splits the first fundamental frequency light from the first frequency-doubling light, the first fundamental frequency light is perpendicular to the direction of the first frequency-doubling light, and when the first frequency-doubling light and the second frequency-doubling light are required to be irradiated simultaneously, the reflective mirror 11 may be disposed parallel to the beam splitter 4, so as to adjust the direction of the first frequency-doubling light and reflect the first frequency-doubling light to the same direction as the light-emitting direction of the second frequency-doubling light.
Referring to fig. 1, a first coupling lens 9 is disposed between the light splitting part and the first light guiding part 7, a second coupling lens 10 is disposed between the second self-frequency doubling crystal 3 and the second light guiding part 8, and the first coupling lens 9 is used for coupling the first frequency doubling light into the first light guiding part 7, so that the light loss between the light splitting part and the first light guiding part 7 can be reduced; the second coupling lens 10 is used for coupling the second frequency multiplication light into the second light guide portion 8, so that the light loss between the second self-frequency multiplication crystal 3 and the second light guide portion 8 can be reduced.
The dual-wavelength self-frequency multiplication device provided by the embodiment of the utility model is used for treating malignant tumors, wherein the initial light wavelength is 976nm, the first fundamental frequency light wavelength is 1008nm, the first frequency multiplication light wavelength is 504nm, the second fundamental frequency light wavelength is 1144nm, and the second frequency multiplication light wavelengthIs 572nm. The substrates of the first self-frequency doubling crystal 2 and the second self-frequency doubling crystal 3 may be gdcub or YCOB based on the frequency of the incident light. In this embodiment, the base materials of the first self-frequency doubling crystal 2 and the second self-frequency doubling crystal 3 are YCOB, and the doped ion is Yb 3+ The doping concentration is 17%, and the YCOB optimum phase matching angle (112.8 degrees, 33.7 degrees).
The implementation principle of the dual-wavelength self-frequency doubling device provided by the embodiment of the utility model is as follows: the initial light emitted by the light source 1 is focused by the first focusing lens 5, then is converted into first fundamental frequency light by the first self-frequency doubling crystal 2, then is converted into first frequency doubling light, the first fundamental frequency light and the first frequency doubling light led out by the first self-frequency doubling crystal 2 are separated by the light splitting part, the first fundamental frequency light is conducted to the second focusing lens 6, is focused by the second focusing lens 6, is converted into second fundamental frequency light by the second self-frequency doubling crystal 3, then is converted into second frequency doubling light, the first frequency doubling light is reflected to the same direction as the second frequency doubling light by the reflector 11, is conducted to the first light guiding part 7 for guiding after being coupled by the first coupling lens 9, and the second frequency doubling light is conducted to the second light guiding part 8 for guiding after being coupled by the second coupling lens 10, so that the light frequency conversion process emitted by the light source is simplified.
Meanwhile, the incidence surface of the first self-frequency doubling crystal 2 is plated with an initial light high-transmission film, a first fundamental frequency light high-reflection film and a first frequency doubling light high-reflection film, the emergent surface of the first self-frequency doubling crystal 2 is plated with the initial light high-reflection film and the first fundamental frequency light high-transmission film, the incidence surface of the second self-frequency doubling crystal 3 is plated with the first fundamental frequency light high-transmission film, the second fundamental frequency light high-reflection film and the second frequency doubling light high-reflection film, and the emergent surface of the second self-frequency doubling crystal 3 is plated with the second frequency doubling light high-transmission film, the first fundamental frequency light high-reflection film and the second fundamental frequency light high-reflection film so as to reduce the loss of light in the double-wavelength self-frequency doubling device and improve the conversion efficiency.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (10)
1. The dual-wavelength self-frequency doubling device is characterized by comprising a light source (1), a first self-frequency doubling crystal (2), a light splitting part and a second self-frequency doubling crystal (3) which are sequentially arranged on a light path, wherein the first self-frequency doubling crystal (2) is used for converting initial light emitted by the light source (1) into first fundamental frequency light and first frequency doubling light, the light splitting part is used for separating the first fundamental frequency light from the first frequency doubling light and conducting the first fundamental frequency light to the second self-frequency doubling crystal (3), and the second self-frequency doubling crystal (3) is used for converting the first fundamental frequency light into second fundamental frequency light and second frequency doubling light.
2. The dual wavelength self-frequency doubling device according to claim 1, wherein the incident surface of the first self-frequency doubling crystal (2) is plated with an initial light high-transmittance film; and/or the number of the groups of groups,
the incident surface of the first self-frequency doubling crystal (2) is plated with a first fundamental frequency light high-reflection film; and/or the number of the groups of groups,
the incident surface of the first self-frequency doubling crystal (2) is plated with a first frequency doubling light high-reflection film; and/or the number of the groups of groups,
the emergent surface of the first self-frequency doubling crystal (2) is plated with an initial light high-reflection film; and/or the number of the groups of groups,
the emergent surface of the first self-frequency doubling crystal (2) is plated with a first fundamental frequency light high-permeability film; and/or the number of the groups of groups,
the emergent surface of the first self-frequency doubling crystal (2) is plated with a first frequency doubling light high-permeability film.
3. The dual wavelength self-frequency doubling device according to claim 1, further comprising a filtering part for filtering the first fundamental frequency light and the second fundamental frequency light and guiding out the second frequency doubled light.
4. The dual-wavelength self-frequency doubling device according to claim 3, wherein the filtering part comprises a first fundamental frequency light high-reflection film plated on the emergent surface of the second self-frequency doubling crystal (3); and/or the number of the groups of groups,
the optical filtering part comprises a second fundamental frequency light high-reflection film plated on the emergent surface of the second self-frequency doubling crystal (3).
5. The dual-wavelength self-frequency doubling device according to claim 1, wherein the incident surface of the second self-frequency doubling crystal (3) is plated with a first fundamental frequency light high-transmittance film; and/or the number of the groups of groups,
the incidence surface of the second self-frequency doubling crystal (3) is plated with a second fundamental frequency light high-reflection film; and/or the number of the groups of groups,
the incidence surface of the second self-frequency doubling crystal (3) is plated with a second frequency doubling light high-reflection film; and/or the number of the groups of groups,
and the emergent surface of the second self-frequency doubling crystal (3) is plated with a second frequency doubling light high-permeability film.
6. The dual wavelength self-frequency doubling device according to claim 1, wherein the beam splitting part comprises a beam splitter (4), and the beam splitter (4) is plated with a first frequency doubling light high reflection film and a first fundamental frequency light high transmission film.
7. The dual-wavelength self-frequency doubling device according to claim 1, wherein a first focusing lens (5) is arranged between the light source (1) and the first self-frequency doubling crystal (2); and/or the number of the groups of groups,
a second focusing lens (6) is arranged between the light splitting part and the second self-frequency doubling crystal (3).
8. The dual wavelength self-frequency doubling device according to claim 1, further comprising a first light guiding part (7) and a second light guiding part (8) arranged on an optical path, wherein the first light guiding part (7) is used for guiding out the first frequency doubling light, and the second light guiding part (8) is used for guiding out the second frequency doubling light.
9. The dual-wavelength self-frequency doubling device according to claim 8, wherein a first coupling lens (9) is arranged between the light splitting part and the first light guiding part (7); and/or the number of the groups of groups,
a second coupling lens (10) is arranged between the second self-frequency doubling crystal (3) and the second light guide part (8); and/or the number of the groups of groups,
a reflector (11) is arranged between the light splitting part and the first light guiding part (7).
10. A therapeutic laser comprising a dual wavelength self-frequency doubling device as claimed in any one of claims 1 to 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117919021A (en) * | 2024-03-21 | 2024-04-26 | 天津迈达医学科技股份有限公司 | Optical path system for anterior ocular segment laser therapeutic apparatus and anterior ocular segment laser therapeutic apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117919021A (en) * | 2024-03-21 | 2024-04-26 | 天津迈达医学科技股份有限公司 | Optical path system for anterior ocular segment laser therapeutic apparatus and anterior ocular segment laser therapeutic apparatus |
| CN117919021B (en) * | 2024-03-21 | 2024-06-04 | 天津迈达医学科技股份有限公司 | Optical path system for anterior ocular segment laser therapeutic apparatus and anterior ocular segment laser therapeutic apparatus |
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