CN115944383B - Optical coupling device for laser medical treatment - Google Patents
Optical coupling device for laser medical treatment Download PDFInfo
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- CN115944383B CN115944383B CN202310231746.2A CN202310231746A CN115944383B CN 115944383 B CN115944383 B CN 115944383B CN 202310231746 A CN202310231746 A CN 202310231746A CN 115944383 B CN115944383 B CN 115944383B
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Abstract
The invention discloses an optical coupling device for laser medical treatment, which comprises an optical fiber input connector, an optical component and an optical fiber output connector; wherein, a certain angle is formed between the optical fiber input connector and the optical fiber output connector, so that the input light and the output light are not in a straight line; the optical component comprises a laser focusing lens, a pump light reflecting mirror and a reflected light intercepting mirror, laser enters the laser focusing lens through an optical input connector to focus, the pump light reflecting mirror separates pump light and target laser in focused light, the reflected light intercepting mirror intercepts part of scattered light in the target laser, and the target laser processed by the optical component is output through an optical fiber output connector. The laser coupled by the invention can misplacement refract the reflected light in the light path, thereby avoiding the influence of the reflected light on the laser source, and effectively preventing the unabsorbed pump light in the cladding of the fiber laser from being burnt out by the fiber joint after focusing coupling.
Description
Technical Field
The invention relates to an optical system, in particular to an optical coupling device for laser medical treatment.
Background
Because the water molecules have strong middle infrared absorption peaks near the laser of the 2 micron wave band, when the laser of the wave band is used for operation, the blood at the laser irradiation part can be quickly coagulated, the operation wound surface is small, and the hemostatic property is good. The existing optical system of the laser medical operation equipment has the following problems: 1) The reflected light has a great influence on the stability of the laser light source; 2) The optical fiber connector is easy to burn after focusing coupling; 3) The optical lens end is polluted by the application of an optical fiber connector to cause secondary pollution; 4) The pump light which is not absorbed in the cladding of the fiber laser is directly burnt out by the application of the fiber connector after convergent coupling; 5) The laser output energy cannot be monitored in real time.
Disclosure of Invention
The invention aims to provide an optical coupling device for laser medical treatment, which can effectively avoid reflected light from damaging a laser light source, can monitor laser output energy in real time, can protect an optical lens end from secondary pollution caused by pollution of an applied optical fiber connector, and can intercept unabsorbed pump light in a cladding of the optical fiber laser and effectively dissipate heat.
The technical scheme adopted by the invention is as follows:
an optical coupling device for laser medical treatment is provided, comprising an optical fiber input connector, an optical component and an optical fiber output connector;
wherein, a certain angle is formed between the optical fiber input connector and the optical fiber output connector, so that the input light and the output light are not in a straight line;
the optical component comprises a laser focusing lens, a pump light reflecting mirror and a reflected light intercepting mirror, laser enters the laser focusing lens through an optical input connector to focus, the pump light reflecting mirror separates pump light and target laser in focused light, the reflected light intercepting mirror intercepts part of scattered light in the target laser, and the target laser processed by the optical component is output through an optical fiber output connector.
With the above technical solution, the optical coupling device further includes:
a laser energy mirror for reflecting a small portion of the laser light;
and the laser energy detector is used for detecting the laser energy of the laser reflected by the laser energy reflecting mirror.
With the technical scheme, the optical coupling device further comprises a pump light interception and absorption mechanism which is positioned on a pump light reflection path of the pump light reflector and used for intercepting and absorbing pump light.
With the above technical solution, the optical coupling device further includes:
the protective mirror is arranged at the front end of the optical fiber output connector in a replaceable manner;
the reflected light interception and absorption mechanism is positioned on the reflected light path of the protective mirror and is used for absorbing and intercepting the reflected light of the protective mirror.
By adopting the technical scheme, the laser entrance port of the optical fiber input connector is a small hole, and the laser exit port of the optical fiber output connector is also a small hole.
By adopting the technical scheme, the optical fiber plug detection mechanism for detecting the in-place condition of the optical fiber output connector is further arranged at the plugging position of the optical fiber output connector.
With the above technical solution, the optical coupling device further includes an indication light inlet through which the indication light enters the optical coupling device and is output from the optical fiber output connector.
By adopting the technical scheme, the pump light reflecting mirror, the reflected light interception mirror and the laser energy reflecting mirror are arranged on the same mounting plate.
By adopting the technical scheme, the insertion position of the protective mirror is also provided with the protective mirror in-place detection mechanism for detecting the in-place condition of the protective mirror.
By adopting the technical scheme, the pump light interception absorbing mechanism adopts a water cooling block or a TEC refrigerating sheet.
By adopting the technical scheme, the reflected light interception absorbing mechanism adopts a water cooling block or a TEC refrigerating plate.
By adopting the technical scheme, the angle between the optical fiber input connector and the optical fiber output connector is 5-10 degrees.
Connect above-mentioned technical scheme, whole device integration is on the casing, the casing includes inferior valve and upper cover, the inferior valve has the inner chamber of sinking, the upper cover is used for sealing the inferior valve, laser focusing lens installs and assembles into lens subassembly on optical lens mounting, lens subassembly installs on the optical fiber input connector or directly installs on the inferior valve, the front end at the inferior valve is installed to optical fiber input connector, the rear end at the inferior valve is installed to the optical fiber output connector, pumping light reflector, reflection light interception mirror and laser energy reflector are all installed at the inner chamber, pumping light interception absorption mechanism, laser energy detector, guard mirror and reflection light interception absorption mechanism are all installed on the lateral wall of inferior valve.
Further, the pump light reflecting mirror, the reflected light intercepting mirror and the laser energy reflecting mirror are arranged on the same mounting plate, and the mounting plate is arranged in the inner cavity through the locating pin.
Preferably, the fiber optic output connector is mounted using a plug-in connection.
Preferably, the protective mirror is mounted in a plug-in manner.
The invention also provides an optical coupling method for laser medical treatment, which comprises the following steps:
laser enters a laser focusing lens through an optical input connector to focus;
the pump light reflector separates pump light and target laser in the focused light;
the reflected light interception mirror intercepts part of scattered light in the target laser;
outputting the target laser processed by the optical component through an optical fiber output connector; and a certain included angle exists between the incident light direction of the optical input connector and the emergent light direction of the optical fiber output connector.
The beneficial effects of the invention are as follows: the invention is used in the optical coupling device of laser medical treatment, and a certain angle is formed between the optical fiber input connector and the optical fiber output connector, so that the input light and the output light are not in the same straight line, the reflected light can be refracted in a dislocation way, the influence of the reflected light on a laser source is avoided, and the stability of the light source is improved. The laser focusing lens can be used for enabling laser to be more concentrated and collimated, and the coupled laser can be effectively prevented from being incident into a cladding part of an optical fiber output connector due to insufficient focusing of the laser, so that the laser is burnt; in addition, the pump light in the laser can be effectively separated through the pump light reflecting mirror, so that the phenomenon that the applied optical fiber connector is burnt out after the unabsorbed pump light in the cladding of the optical fiber laser is focused and coupled can be effectively prevented.
Further, by arranging the protective lens at the front end of the optical fiber output connector, scraps generated when laser acts on a patient can be prevented from entering the optical component, so that the optical lens end can be protected from being polluted by the optical fiber application end to cause secondary pollution to optical components.
Further, the angle between the optical fiber input connector and the optical fiber output connector is 5-10 degrees, so that on one hand, the total reflection conduction of laser energy in the optical fiber can be ensured, and on the other hand, incident light with a certain angle can be prevented from being reflected back to the laser through the vertical plane of the optical fiber, and the laser is protected.
Further, by arranging the pump light interception absorbing mechanism, the pump light which is not absorbed in the intercepted fiber laser cladding can be effectively radiated.
Furthermore, the laser is incident and emitted from the small hole, so that the reflected light can be effectively prevented from damaging the laser light source.
Further, by arranging the laser energy reflector to reflect a small part of laser, and then detecting the laser energy reflected by the laser energy reflector through the laser energy detector, the laser output energy can be monitored in real time.
Drawings
Fig. 1 is a schematic perspective view of an optical coupling device for laser medical treatment according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a second optical coupling device for laser medical treatment according to an embodiment of the present invention.
Fig. 3 is a top view of an optical coupling device for laser medical treatment according to an embodiment of the present invention with a cover removed.
Fig. 4 is a schematic perspective view of an optical coupling device for laser medical treatment according to an embodiment of the present invention with an upper cover removed.
Fig. 5 is a schematic perspective view of an optical coupling device for laser medical treatment according to an embodiment of the present invention with a cover removed.
Fig. 6 is a schematic diagram of an optical coupling device for laser medical treatment in an embodiment of the present invention.
Fig. 7 is an optical path diagram of the paths of the optical fiber input connector, the laser focusing lens, the pump light reflecting mirror, the interception piece, and the laser energy reflecting mirror in the embodiment of the present invention.
Fig. 8 is a cross-sectional view of an optical fiber input connector in accordance with an embodiment of the present invention.
Fig. 9 is a cross-sectional view of an optical fiber output connector in accordance with an embodiment of the present invention.
FIG. 10 is a flow chart of an optical coupling method according to an embodiment of the invention.
In the figure: 1-a pump light interception and absorption mechanism; 2-a lower shell; 3-an optical fiber input connector; 4-an indicator light inlet; 5-a reflected light interception absorbing mechanism; 6-a laser energy detector; 7-an upper cover; 8-an optical fiber in-place detection mechanism; 9-an optical fiber output connector; 10-a laser focusing lens; 11-an optical lens mount; 12-a pump mirror; 13-a reflective light interception mirror; 14-a laser energy mirror; 15-mounting plates; 16-locating pins; 17-a protective mirror in-place detection mechanism; 18-a protective mirror; 19-small holes.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 and 3, an optical coupling device for laser medical treatment according to an embodiment of the present invention includes an optical fiber input connector 3, an optical component, and an optical fiber output connector 9. The optical fiber input connector 3 and the optical fiber output connector 9 form a certain angle, so that the input light and the output light are not on the same straight line, reflected light can be refracted in the optical fiber in a dislocation way, the influence of the reflected light on a laser source is avoided, and the stability of the light source is improved.
As shown in fig. 3 and 6, the optical component includes a laser focusing lens 10, a pump light reflecting mirror 12 and a reflected light intercepting mirror 13, the laser enters the laser focusing lens 10 through the optical fiber input connector 3 to focus, the pump light reflecting mirror 12 separates the pump light and the target laser in the focused light, the reflected light intercepting mirror 13 intercepts part of the scattered light in the target laser, and the target laser processed by the optical component is output through the optical fiber output connector. Because the conduction band of the laser beam (the laser beam contains the pump light and the target laser) has a certain divergence angle, the laser can be more intensively collimated through the laser focusing lens 10, so that the coupled laser is effectively prevented from being incident into the cladding part of the optical fiber output connector due to insufficient focusing of the laser, and is burnt; in addition, the pump light in the laser can be effectively separated through the pump light reflecting mirror 12, so that the phenomenon that the applied optical fiber joint is burnt out after the unabsorbed pump light in the cladding of the optical fiber laser is focused and coupled can be effectively prevented.
As shown in fig. 10, with the optical coupling device for laser medical treatment of the above-described embodiment, the following optical coupling method can be realized:
s1, laser enters a laser focusing lens through an optical input connector to be focused;
s2, a pump light reflector separates pump light and target laser in the focused light;
s3, a reflected light interception mirror intercepts part of scattered light in the target laser;
s4, outputting the target laser processed by the optical component through an optical fiber output connector; and a certain included angle exists between the incident light direction of the optical input connector and the emergent light direction of the optical fiber output connector.
Further, step S5 may be included to make a beam of indication light incident into the optical coupling device and exit through the optical fiber output connector 9, so as to observe the exiting laser.
In another embodiment of the present invention, the angle at which the fiber input connector 3 is directed to the fiber output connector 9 is determined by the half angle incidence angle of the applied fiber, and the included angle between the two is 5 ° to 10 °. The preferred application fiber half angle is 7 ° (i.e. the angle between the fiber input connector 3 and the fiber output connector 9 is also 7 °). The preferred included angle range of the invention can improve the total reflection conduction efficiency of laser energy in the optical fiber on one hand, and prevent laser from being reflected back to the laser through the vertical plane of the optical fiber on the other hand to protect the laser.
Specifically, the pump mirror 12 may be provided with a reflective anti-reflection film (or coating) that can reflect the pump light and also can anti-reflect the target laser light.
In a preferred embodiment of the present invention, the optical fiber input connector 3 adopts a small hole structure, the optical fiber output connector 9 also adopts a small hole structure, and reflected light can be effectively prevented from damaging the laser light source by adopting small holes to enter and emit laser light.
As shown in fig. 1 and 4, the optical coupling device for laser medical treatment according to an embodiment of the present invention further includes an indication light inlet 4, and the indication light inlet 4 may be disposed opposite to the optical fiber output connector 9, and the indication light enters the inside of the optical coupling device through the indication light inlet 4 and is output from the optical fiber output connector 9. The indicating light is colored light, and the indicating light is incident into the laser and can be used for marking a laser path, so that the indicating light is convenient for operators to observe and better assists laser medical treatment.
Further, as shown in fig. 3, the optical coupling device for laser medical treatment further comprises a laser energy mirror 14 and a laser energy detector 6, the laser energy mirror 14 being mainly used for reflecting a small part of the laser light, e.g. only 1% of the laser light needs to be reflected. The laser energy detector 6 is located on the laser energy reflection path of the laser energy mirror 14, and is used for detecting the laser energy of a small part of the laser reflected by the laser energy mirror, so that the laser output energy can be monitored in real time.
Further, as shown in fig. 3, the optical coupling device for laser medical treatment further includes a pump light interception and absorption mechanism 1, and the pump light interception and absorption mechanism 1 is located on a pump light reflection path of the pump light mirror 12. The pump light reflector 12 separates pump light and laser light, and the pump light is absorbed and intercepted by the pump light interception and absorption mechanism 1, so that the phenomenon that the optical fiber connector (namely the optical fiber output connector 9) is burnt out after the unabsorbed pump light in the cladding of the optical fiber laser is focused and coupled can be effectively prevented. The pump light interception and absorption mechanism 1 can adopt a water cooling block or a TEC refrigerating sheet, and can also use an air cooling structure if the condition allows, so that the pump light can be intercepted and the pump light which is not absorbed in the intercepted fiber laser cladding can be effectively radiated.
Further, as shown in fig. 3, the optical coupling device for laser medical treatment further includes a protection mirror 18 and a reflected light interception and absorption mechanism 5, the protection mirror 18 is interchangeably provided at the front end of the optical fiber output connector 9, and the reflected light interception and absorption mechanism 5 is located on the reflected light path of the protection mirror 18. The arrangement of the protective lens 18 prevents debris generated when laser light acts on the patient from entering the optical assembly, thereby protecting the optical lens end from contamination of the optical fiber application end and secondary pollution to optical components.
In the preferred embodiment of the present invention, the refractive index 2.446 of the laser focusing lens 10 is coated with 1950-2050nm wavelength antireflection film, and the incident angle is 5-7 degrees; the laser transmission range phi of the reflection light interception mirror 13 is 8mm; the transmittance T of the laser energy detection reflecting mirror is more than 99.8% at 1950-2050 nm; the laser energy detector 6 receives a reflected portion of the laser light and measures the total laser energy as a small portion of the laser energy.
As shown in fig. 1 to 5, in the present embodiment, the entire apparatus is integrated on a housing including a lower case 2 and an upper cover, the lower case 2 having a sunk inner cavity, and the upper cover for closing the lower case. A laser focusing lens 10, a pump light reflecting mirror 12, a reflected light intercepting mirror 13, and a laser energy reflecting mirror 14 are provided in this order on the optical path from the optical fiber input connector 3 to the optical fiber output connector 9. The laser focusing lens 10 can be installed on an optical lens fixing piece to form a lens assembly, the lens assembly is installed on the optical fiber input connector 3 or is directly installed on the lower shell 2, the optical fiber input connector 3 is installed at the front end of the lower shell 2, the optical fiber output connector 9 is installed at the rear end of the lower shell 2, the pumping light reflecting mirror 12, the reflecting light intercepting mirror 13 and the laser energy reflecting mirror 14 are all installed in an inner cavity, the pumping light intercepting and absorbing mechanism 1, the laser energy detector 6, the protecting mirror 18 and the reflecting light intercepting and absorbing mechanism 5 are all installed on the side wall of the lower shell 2, and the arrangement can integrate all elements of the whole device together and protect precise instruments.
The laser generated by the fiber laser is conducted through the fiber input connector 3, the conduction band of the laser beam (the laser beam contains pumping light and target laser) has a certain divergence angle, the laser focusing lens 10 focuses the laser, the pumping light reflector 12 separates the pumping light and the laser (the coating on the pumping light reflector can reflect the pumping light and the target laser is reflected), the laser passes through the reflecting light interception mirror 13 to intercept a small part of scattered light outside a focusing path, the laser energy reflector 14 reflects a small part of laser for detecting laser energy, and most of the energy of the laser beam is conducted and focused at the small hole position of the fiber output connector 9 and finally transmitted to the application fiber to complete the optical path coupling.
As shown in fig. 3 to 5, in the present embodiment, the pump light reflecting mirror 12, the reflected light intercepting mirror 13 and the laser energy reflecting mirror 14 are mounted on the same mounting plate, and the mounting plate 15 is mounted in the inner cavity by a plurality of positioning pins 16, which can achieve accurate positioning and mounting of the pump light reflecting mirror 12, the reflected light intercepting mirror 13 and the laser energy reflecting mirror 14, and ensure that the three have predetermined effects.
As shown in fig. 1 to 5, in the present embodiment, the optical fiber output connector 9 is installed by plugging, and an optical fiber plug detection mechanism for detecting the in-place condition of the optical fiber output connector is provided at the plugging position, and the optical fiber plug detection mechanism can detect the in-place condition by an optical coupler or a machine, so as to avoid misoperation of personnel.
As shown in fig. 3 to 5, in the present embodiment, the protection mirror 18 is installed in a plugging manner, and a protection mirror in-place detection mechanism 17 for detecting an in-place condition of the protection mirror 18 is provided at a plugging position, where the protection mirror in-place detection mechanism 17 can detect an in-place condition through an optocoupler or a machine, so as to avoid misoperation of personnel.
In this embodiment, the pump light interception absorbing means 1 and the reflected light interception absorbing means 5 each use a relatively common water cooling block.
In summary, in the device, the laser incidence has a certain angle, the reflected light can be misplaced and refracted, the influence of the reflected light on the laser source is avoided, and the laser is incident and emitted through the small holes, so that the damage of the reflected light to the laser source can be effectively avoided; the device can intercept the unabsorbed pump light in the cladding of the fiber laser and effectively dissipate heat, can protect the optical lens end from being polluted by the application end of the fiber, and can monitor the laser energy in real time.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (9)
1. An optical coupling device for laser medical treatment, characterized in that: the optical fiber connector comprises an optical fiber input connector, an optical component and an optical fiber output connector;
wherein, a certain angle is formed between the optical fiber input connector and the optical fiber output connector, so that the input light and the output light are not in a straight line;
the optical component comprises a laser focusing lens, a pump light reflecting mirror and a reflected light intercepting mirror, laser enters the laser focusing lens through an optical input connector to focus, the pump light reflecting mirror separates pump light and target laser in focused light, the reflected light intercepting mirror intercepts part of scattered light in the target laser, and the target laser processed by the optical component is output through an optical fiber output connector;
the optical coupling device also comprises a pump light interception and absorption mechanism which is positioned on a pump light reflection path of the pump light reflector and used for intercepting and absorbing pump light.
2. The optical coupling device for laser medical treatment according to claim 1, wherein: the optical coupling device further includes:
a laser energy reflecting mirror for reflecting a part of the laser light;
and the laser energy detector is used for detecting the laser energy of the laser reflected by the laser energy reflecting mirror.
3. The optical coupling device for laser medical treatment according to claim 1, wherein: the optical coupling device further includes:
the protective mirror is arranged at the front end of the optical fiber output connector in a replaceable manner;
the reflected light interception and absorption mechanism is positioned on the reflected light path of the protective mirror and is used for absorbing and intercepting the reflected light of the protective mirror.
4. The optical coupling device for laser medical treatment according to claim 1, wherein: the laser entrance of the optical fiber input connector is a small hole, and the laser exit of the optical fiber output connector is also a small hole.
5. The optical coupling device for laser medical treatment according to claim 1, wherein: and an optical fiber plug detection mechanism for detecting the in-place condition of the optical fiber output connector is further arranged at the plugging position of the optical fiber output connector.
6. The optical coupling device for laser medical treatment according to claim 1, wherein: the optical coupling device further includes an indication light inlet through which the indication light enters the interior of the optical coupling device and is output from the optical fiber output connector.
7. An optical coupling device for laser medical treatment as claimed in claim 3, wherein: the insertion position of the protective mirror is also provided with a protective mirror in-place detection mechanism for detecting the in-place condition of the protective mirror.
8. The optical coupling device for laser medical treatment according to claim 1, wherein: the pump light interception and absorption mechanism adopts a water cooling block or a TEC refrigerating sheet.
9. An optical coupling device for laser medical treatment according to any one of claims 1-8, characterized in that: the angle between the optical fiber input connector and the optical fiber output connector is 5-10 degrees.
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| CN202310231746.2A CN115944383B (en) | 2023-03-13 | 2023-03-13 | Optical coupling device for laser medical treatment |
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| CN202310231746.2A CN115944383B (en) | 2023-03-13 | 2023-03-13 | Optical coupling device for laser medical treatment |
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| CN115944383A (en) | 2023-04-11 |
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