CN111290072A - Hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy - Google Patents
Hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy Download PDFInfo
- Publication number
- CN111290072A CN111290072A CN202010109052.8A CN202010109052A CN111290072A CN 111290072 A CN111290072 A CN 111290072A CN 202010109052 A CN202010109052 A CN 202010109052A CN 111290072 A CN111290072 A CN 111290072A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- multimode
- fiber
- hollow anti
- resonance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/023—Microstructured optical fibre having different index layers arranged around the core for guiding light by reflection, i.e. 1D crystal, e.g. omniguide
- G02B6/02304—Core having lower refractive index than cladding, e.g. air filled, hollow core
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
- A61B18/26—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Laser Surgery Devices (AREA)
Abstract
The invention discloses a hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy, and belongs to the technical field of holmium laser application. The device comprises a hollow anti-resonance optical fiber and a multimode optical fiber which are welded together. The end of the multimode fiber is fused into a spherical structure, and a waterproof structure with certain light convergence capacity is realized by adjusting the structural parameters of the spherical fiber core, including a spherical inclination angle, a spherical length and a curvature radius. The method comprises the following steps: firstly, a section of multimode optical fiber is taken and fused with a hollow anti-resonance optical fiber; the multimode fiber is cleaved leaving a length of less than 200 microns and the end face of the multimode fiber is then spheronized. The waterproof method and the waterproof device for the hollow anti-resonance optical fiber have the advantages of preventing the air hole structure of the hollow anti-resonance optical fiber from entering water and reducing the resistance of the optical fiber when the optical fiber is placed into an endoscope working cavity, and have certain light convergence capacity, so that the emergent light spot of the optical fiber is smaller and the energy is converged.
Description
Technical Field
The invention relates to a holmium laser, in particular to a hollow anti-resonant fiber waterproof method and a hollow anti-resonant fiber waterproof device for holmium laser lithotripsy.
Background
The holmium laser is a pulse solid laser with the wavelength of 2.1 mu m, and is applied to the field of laser lithotripsy. Laser light generated by the holmium laser is transmitted through the optical fiber. In the lithotripsy operation, an endoscope is required to be guided into a human body to a calculus position, and then an optical fiber penetrates through an endoscope pipeline. After the endoscope is led in, manual water injection is carried out to ensure that the sight of the endoscope is clear and broken stones are smoothly discharged. The holmium laser transmission optical fiber mainly used at present is a traditional quartz optical fiber, and the holmium laser transmission optical fiber has the problems of large diameter and low power threshold, so that the holmium laser is transmitted by using the hollow anti-resonance optical fiber with small optical fiber diameter and high power threshold, but the hollow anti-resonance optical fiber also has a problem that the air hole structure of the hollow anti-resonance optical fiber enters water to influence the transmission of the laser.
Disclosure of Invention
In order to solve the problems and prevent the hollow anti-resonance optical fiber from entering water to influence laser transmission, the invention provides a hollow anti-resonance optical fiber waterproof method and a hollow anti-resonance optical fiber waterproof device for holmium laser lithotripsy, which are characterized by being waterproof, small in resistance and small in size when being placed in an endoscope working cavity.
The invention provides a hollow anti-resonance optical fiber waterproof device for holmium laser lithotripsy. One end of the multimode optical fiber is welded with the hollow anti-resonance optical fiber. The end face of the other end of the multimode optical fiber is spherical.
The diameter of the core of the hollow anti-resonance optical fiber is 40 mu m, and the diameter of the cladding is 125 mu m.
The diameter of the core of the multimode optical fiber is 50 μm, the diameter of the cladding is 125 μm, and the length is less than 200 μm.
The radius of curvature of the spherical end face of the multimode optical fiber is 200-250 mu m.
The invention provides a hollow anti-resonance optical fiber waterproof method for holmium laser lithotripsy, which comprises the following steps:
a section of multimode optical fiber is taken to be welded with a hollow anti-resonance optical fiber;
the multimode fiber is cut to a length of less than 200 microns, and the end face of the multimode fiber is fused into a sphere, and the end serves as the end for transmitting holmium laser.
Compared with the prior art, the invention has the advantages and positive effects that: the hollow anti-resonance optical fiber waterproof method and the device provided by the invention can prevent the air hole structure of the hollow anti-resonance optical fiber from entering water, thereby influencing the transmission of laser, and the spherical structure reduces the resistance of the optical fiber when being placed into the working cavity of the endoscope, thereby reducing the damage risk of the endoscope in the process of placing the optical fiber, and simultaneously has certain light convergence capacity, so that the emergent light spot of the optical fiber is smaller, the energy is converged, and the lithotripsy time is favorably shortened.
Drawings
FIG. 1 is a schematic structural diagram of a hollow-core antiresonant optical fiber waterproof device for holmium laser lithotripsy provided by the invention;
FIG. 2 is a schematic diagram showing the variation of the spot size at the output end when the end face of the multimode optical fiber is not fused into a sphere in the present invention;
FIG. 3 is a schematic diagram showing the variation of the spot size at the output end when the end face of the multimode optical fiber is fused into a sphere according to the present invention;
FIG. 4 is a schematic diagram showing the distance from the output end of the multimode optical fiber to the light converging focus as a function of the radius of curvature when the multimode optical fiber is placed in air according to the present invention;
FIG. 5 is a schematic diagram showing the variation of the spot size with the radius of curvature at the focus of light convergence when the multimode optical fiber is placed in air in accordance with the present invention;
FIG. 6 is a schematic representation of the divergence angle of light transmission as a function of radius of curvature after the focal point of a multimode optical fiber of the present invention placed in air;
FIG. 7 is a schematic diagram showing the change of the spot size with the radius of curvature at 1mm from the output end of the multimode optical fiber when the multimode optical fiber is placed in air according to the present invention;
in the figure:
1-hollow anti-resonant fiber; 2-a multimode optical fiber; and 3-welding points.
Detailed description of the invention
The method and the device for waterproofing the hollow-core antiresonant optical fiber for holmium laser lithotripsy provided by the invention are further explained with reference to the attached drawings.
The hollow anti-resonance optical fiber waterproof device for holmium laser lithotripsy, disclosed by the invention, as shown in fig. 1, structurally comprises a hollow anti-resonance optical fiber 1 and a multimode optical fiber 2. The diameter of the fiber core of the hollow anti-resonance optical fiber 1 is 40 mu m, the diameter of the fiber core of the multimode optical fiber 2 is 50 mu m, and the hollow anti-resonance optical fiber 1 and the multimode optical fiber 2 are connected together through a welding point 3. Melting the end face of the multimode optical fibre 2 causes the end face to become spherical, the spherical structure affecting the transmission of light, for example the light emerging from the output end will be somewhat convergent. The core of the multimode fiber 2 is also fused into a sphere along with the cladding, and the structural parameters of the spherical core comprise a spherical inclination angle theta, a spherical length L and a curvature radius R. The variation data of the spot size of the emergent laser at the output end of the multimode optical fiber 2 in the air and in the water can be obtained through simulation, parameters such as the distance from the output end of the multimode optical fiber 2 to a light convergence focus, the spot size at the light convergence focus, the divergence angle of light transmission after the focus and the like can be obtained through analyzing the data, and the appropriate structural parameters can be preferably selected by adjusting the spherical inclination angle theta, the spherical length L and the curvature radius R and comparing the output light parameters in combination with practical application.
The specific structural design of the hollow anti-resonance optical fiber waterproof method and the device for holmium laser lithotripsy provided by the invention is optimized as follows:
the longer the length of the multimode optical fiber 2 fused with the hollow anti-resonance optical fiber 1, the greater the loss, and the shorter the length, the higher the difficulty of actual interception, so the compromise is to select the length of the multimode optical fiber 2 to be less than 200 μm.
Fig. 2 shows the change of the spot size at the output end when the end face of the multimode optical fiber 2 is not fused into a sphere, and it can be seen from the figure that the laser is transmitted from the output end in a divergent state. Fig. 3 shows the change of the spot size at the output end when the end face of the multimode fiber 2 is fused into a sphere, where the sphere inclination angle θ is 10 °, the sphere length L is 20 μm, and the curvature radius R is 100 μm, and it can be seen from the figure that the laser is converged and then divergently transmitted from the output end.
By respectively changing the spherical inclination angle theta, the spherical length L and the curvature radius R, the spherical inclination angle theta and the spherical length L which are obtained through simulation have little influence on the change condition of the light spot size of the output end, and the curvature radius R has larger influence, so that the change conditions of parameters such as the distance from the output end of the multimode optical fiber 2 to the light convergence focus, the light spot size of the light convergence focus and the divergence angle of light transmission after the focus are mainly simulated when the curvature radius R is changed.
When the multimode optical fiber 2 is placed in air, the radius of curvature R is larger than 400 μm, laser light is transmitted in a divergent state from an output end, and the diameter of the multimode optical fiber 2 is 125 μm, so that the range of variation of the radius of curvature R is 70 μm to 400 μm.
Fig. 4, 5, and 6 respectively show the influence of the radius of curvature R on the distance from the output end of the multimode optical fiber 2 to the light converging focus, the spot size at the light converging focus, and the divergence angle of light transmission after the focus, when the multimode optical fiber 2 is placed in air, the spherical inclination angle θ is 20 °, and the spherical length L is 20 μm. As can be seen from fig. 4, when the radius of curvature R is smaller than 200 μm, the larger the radius of curvature R, the longer the distance from the output end of the multimode optical fiber 2 to the light converging focus point; as can be seen from fig. 5, when the curvature radius R is increased, the spot size at the light converging focus tends to increase; as can be seen from fig. 6, the radius of curvature R increases, the divergence angle of light transmission after the focal point tends to decrease, and when the radius of curvature R is larger than 200 μm, the magnitude of the divergence angle tends to be uniform.
Fig. 7 shows the effect of the radius of curvature R on the spot size at 1mm at the output end of the multimode optical fiber 2 when the multimode optical fiber 2 is placed in air with a spherical tilt angle θ of 20 ° and a spherical length L of 20 μm, and it can be seen that the change rule of the spot size at 1mm at the output end of the multimode optical fiber 2 is consistent with the divergence angle of light transmission after the focus.
Theoretically, when the calculus is positioned at the light convergence focus and the light spot is small, the calculus breaking effect is good, but the distance from the output end of the optical fiber to the light convergence focus is only hundreds of micrometers at the moment, and the accurate control cannot be realized in the actual operation process, so that when the curvature radius R ranges from 200 micrometers to 400 micrometers, the divergence angle of light transmission after the focus and the size of the light spot at the position of 1mm at the output end of the multimode optical fiber 2 are smaller by combining the graph of fig. 6 and 7, and the calculus breaking is more beneficial.
When the multimode optical fiber 2 is placed in water, the curvature radius R is larger than 250 μm, the laser light is transmitted from the output end in a divergent state, and when the curvature radius R is smaller than 250 μm, the variation rule of each parameter is consistent with the case in air, so that the curvature radius R should be selected to be smaller than 250 μm.
The holmium laser stone breaking principle is that laser is emitted from the tail end of an optical fiber in an aligned mode with stones, part of the laser is absorbed by water around the stones to form a vaporization channel, the rest laser penetrating through the channel is absorbed by the stones, the stones are smashed and finally flushed out of a human body through water, and based on the principle, the range of the curvature radius R is selected to be 200-250 microns by combining the change rule of the sizes of light spots of the multimode optical fiber 2 which is placed in the air and placed in the water.
Correspondingly, the hollow anti-resonance optical fiber waterproof method for holmium laser lithotripsy is mainly characterized in that a section of multimode optical fiber 2 is firstly welded with a hollow anti-resonance optical fiber 1; then the multimode fiber 2 is cut to leave the length less than 200 microns; and finally, melting the tail end surface of the multimode fiber into a sphere, wherein the spherical tail end of the multimode fiber is the tail end for transmitting holmium laser. According to the above analysis, the spherical end face is fused into a size having a radius of curvature of 200 to 250 mm.
Through the design of the hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy, the obtained structure can be waterproof and can also play a role in converging laser, so that the emergent light spot of the optical fiber is smaller, the energy is converged, and the lithotripsy time is favorably shortened.
Claims (6)
1. A hollow anti-resonance optical fiber waterproof device for holmium laser lithotripsy is characterized by comprising a hollow anti-resonance optical fiber and a multimode optical fiber; one end of the multimode fiber is welded with the hollow anti-resonance fiber, and the end face of the other end of the multimode fiber is fused into a sphere.
2. The water repellent device for hollow-core antiresonant fibers for holmium laser lithotripsy according to claim 1, wherein the core diameter of the hollow-core antiresonant fiber is 40 μm and the cladding diameter is 125 μm.
3. The hollow-core antiresonant optical fiber water-repellent device for holmium laser lithotripsy according to claim 1, wherein the multimode optical fiber has a core diameter of 50 μm, a cladding diameter of 125 μm, and a length of less than 200 μm.
4. The hollow-core antiresonant optical fiber waterproof device for holmium laser lithotripsy as claimed in claim 1, wherein the spherical end face of the multimode optical fiber is the end for transmitting holmium laser, and the radius of curvature of the spherical end face is 200-250 μm.
5. A hollow anti-resonance optical fiber waterproof method for holmium laser lithotripsy is characterized by comprising the following steps:
a section of multimode optical fiber is taken to be welded with a hollow anti-resonance optical fiber;
and cutting the multimode optical fiber to leave a length of less than 200 microns, and then fusing the end face of the multimode optical fiber into a sphere, wherein one end of the multimode optical fiber with the spherical end face is the tail end for transmitting holmium laser.
6. The method for waterproofing a hollow-core antiresonant optical fiber for holmium laser lithotripsy according to claim 5, wherein the spherical end face of the multimode optical fiber has a radius of curvature of 200 to 250 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010109052.8A CN111290072A (en) | 2020-02-21 | 2020-02-21 | Hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010109052.8A CN111290072A (en) | 2020-02-21 | 2020-02-21 | Hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111290072A true CN111290072A (en) | 2020-06-16 |
Family
ID=71029306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010109052.8A Pending CN111290072A (en) | 2020-02-21 | 2020-02-21 | Hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111290072A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811497A (en) * | 2005-01-27 | 2006-08-02 | 日立电线株式会社 | Laser energy transmission optical fiber, laser energy transmission method and laser energy transmission device |
| CN102741722A (en) * | 2009-11-18 | 2012-10-17 | 波士顿科学国际医疗贸易公司 | Methods and apparatus related to a distal end portion of an optical fiber having a substantially spherical shape |
| WO2016048023A1 (en) * | 2014-09-24 | 2016-03-31 | 광주과학기술원 | Optical fiber tip capable of radial firing, method for manufacturing same, and medical optical fiber device comprising same |
| CN209827993U (en) * | 2018-12-06 | 2019-12-24 | 华南师范大学 | Flexible fixed-point phototherapy system based on band-gap microstructure optical fibers |
-
2020
- 2020-02-21 CN CN202010109052.8A patent/CN111290072A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811497A (en) * | 2005-01-27 | 2006-08-02 | 日立电线株式会社 | Laser energy transmission optical fiber, laser energy transmission method and laser energy transmission device |
| CN102741722A (en) * | 2009-11-18 | 2012-10-17 | 波士顿科学国际医疗贸易公司 | Methods and apparatus related to a distal end portion of an optical fiber having a substantially spherical shape |
| WO2016048023A1 (en) * | 2014-09-24 | 2016-03-31 | 광주과학기술원 | Optical fiber tip capable of radial firing, method for manufacturing same, and medical optical fiber device comprising same |
| CN209827993U (en) * | 2018-12-06 | 2019-12-24 | 华南师范大学 | Flexible fixed-point phototherapy system based on band-gap microstructure optical fibers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2012696C (en) | Method and apparatus for fabricating microlenses on optical fibers | |
| US5457759A (en) | Monolithic optical system and method of making same including improved coupling means between an optical fiber and a phototransducer | |
| JP2511571B2 (en) | Optical communication package, method of connecting optical power and optical fiber, method of manufacturing optical fiber microlens | |
| US5101090A (en) | Methods and apparatus for making optical fiber couplers | |
| CN100580491C (en) | Capillary pipe optical fibre light forceps and its manufacture method | |
| CN101236275A (en) | Optical forceps based on ring -shaped multi- core optical fibre | |
| US20110194816A1 (en) | Optical Fiber Having Cladding Scattering Centers | |
| US20060137403A1 (en) | High energy fiber terminations and methods | |
| CN201017078Y (en) | High power laser injection fiber coupling device | |
| CN107530828A (en) | Method for being coupled to laser beam in liquid injection beam | |
| CN207882578U (en) | A kind of laser bundling device | |
| CN111290072A (en) | Hollow anti-resonance optical fiber waterproof method and device for holmium laser lithotripsy | |
| CN203480079U (en) | End cap structure for reducing the entering of feedback light into optical fiber | |
| WO1985005262A1 (en) | Medical and surgical laser probe i | |
| CN112713490B (en) | Mid-infrared band continuous all-fiber oscillator | |
| CN101395513A (en) | Light input/output port of optical component and beam converting apparatus | |
| CN114280803B (en) | Manufacturing method of optical fiber laser beam combiner | |
| CN101852890A (en) | Single fiber optical tweezers manufacturing method based on corroded graded-index multimode fiber | |
| CN210296857U (en) | Side pump signal beam combiner for realizing annular light beam | |
| CN112068250B (en) | Combined optical fiber optical tweezers based on special optical fiber | |
| JPH05288967A (en) | Optical fiber for laser input | |
| CN109683235A (en) | A kind of multilayer fibers and the Optical Maser System for realizing bidifly light output | |
| CN112068249B (en) | Fiber optical tweezers based on special optical fiber and system | |
| CN113707356A (en) | Flexible optical micro-hand system and particle control method | |
| CN105068179B (en) | Optical fiber structure containing metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200616 |