CN110471139A - Optical fiber and its application method - Google Patents
Optical fiber and its application method Download PDFInfo
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- CN110471139A CN110471139A CN201910717031.1A CN201910717031A CN110471139A CN 110471139 A CN110471139 A CN 110471139A CN 201910717031 A CN201910717031 A CN 201910717031A CN 110471139 A CN110471139 A CN 110471139A
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- attached bag
- bag layer
- optical fiber
- fibre core
- laser
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims description 18
- 239000010453 quartz Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 24
- 206010028980 Neoplasm Diseases 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
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
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
-
- 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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0283—Graded index region external to the central core segment, e.g. sloping layer or triangular or trapezoidal layer
-
- 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
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
-
- 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
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Radiation-Therapy Devices (AREA)
- Laser Surgery Devices (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
A kind of optical fiber and its application method, the optical fiber include: fibre core；Covering, the covering are sheathed on outside the fibre core, and the covering includes at least two attached bag layers being radially distributed from the inside to the outside.The applicable scene of the optical fiber is wide, can satisfy requirement of the different clinical applications to laser beam divergence.
Description
Technical field
The present invention relates to medical instruments field more particularly to a kind of optical fiber and its application methods.
Background technique
Treatment uses optical fiber to refer to using optical fiber as laser propagation medium, by utilizing the production treated to luminous energy
Product.
For example, the light that external light source issues is imported in vivo by optical fiber, the position for needing to check in human body is irradiated, then pass through
Optical fiber spreads out of the lesion image for the intracorporeal organ observed in vitro, with diagnosis and the treatment of assisting a physician.
In addition, optical fiber is by high energy pulse laser transfer to tumour position, when using the high energy of laser, collimation, effect
Between short and heat-affected zone it is small the features such as, tumour is cut off completely.
But the structure of existing fiber still has much room for improvement.
Summary of the invention
Problems solved by the invention is to provide a kind of optical fiber and its application method, and it is wide to be applicable in scene, can satisfy difference and faces
Requirement of the bed occasion to laser beam divergence.
To solve the above problems, the present invention provides a kind of optical fiber, comprising: fibre core；Covering, the covering are sheathed on the fibre
Outside core, the covering includes at least two attached bag layers being radially distributed from the inside to the outside.
Optionally, the refractive index of the fibre core is greater than the refractive index of the covering.
Optionally, radially from the inside to the outside, the refractive index of the attached bag layer is gradually reduced, and the refractive index of the fibre core is greater than
The refractive index of the attached bag layer of innermost layer.
Optionally, when the quantity of the attached bag layer is two, two attached bag layers are respectively the first attached bag layer and the
Two attached bag layers, the second attached bag layer are sheathed on outside the first attached bag layer.
Optionally, the fibre core and the first attached bag layer constitute the first sub-assembly, the first attached bag layer and described the
Two attached bag layers constitute the second sub-assembly, and the numerical aperture of first sub-assembly is less than the numerical aperture of second sub-assembly.
Optionally, the numerical aperture of first sub-assembly is 0.22, and the numerical aperture of second sub-assembly is 0.37.
Optionally, the refractive index of the fibre core is 1.5, and the refractive index of the first attached bag layer is 1.48, second son
The refractive index of covering is 1.44.
Optionally, the material of the fibre core is quartz, and the material of the first attached bag layer is fluorine-doped quartz, second son
The material of covering is plastics.
Optionally, the diameter of the fibre core be 550 microns, the first attached bag layer with a thickness of 600 microns, described second
Attached bag layer with a thickness of 750 microns.
Correspondingly, the present invention also provides a kind of optical fiber application method, including above-mentioned optical fiber is provided.
Compared with prior art, technical solution of the present invention has the advantage that
The optical fiber includes fibre core and the covering that is sheathed on outside the fibre core, and the covering includes radially dividing from the inside to the outside
At least two attached bag layers of cloth.It can be transmitted according to different applicable scenes, flexible choice using the fibre core or the covering
Laser, alternatively, utilizing the fibre core and the covering simultaneous transmission laser.For example, may be selected when using laser cutting tumour
Laser is transmitted using the fibre core, to obtain the small laser of the angle of divergence.Stop blooding for multiple blutpunktes, needs large area
When irradiation, then it may be selected to transmit laser using the covering, to obtain the big laser of the angle of divergence.Therefore the optical fiber can satisfy
It is wide to be applicable in scene for requirement of the different clinical applications to laser beam divergence.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the optical fiber of one embodiment of the invention；
Fig. 2 is sectional view of the optical fiber shown in FIG. 1 along the direction A1A2；
Fig. 3 is sectional view of the optical fiber shown in FIG. 1 along the direction C1C2.
Specific embodiment
It can be seen from background technology that the structure of existing fiber is still to be improved.
It is analyzed now in conjunction with a kind of optical fiber, the optical fiber includes: fibre core；Covering, the covering are sheathed on the fibre core
Outside.Laser is transmitted through the fibre core, and the angle of divergence of the laser of acquisition is the fixed angle of divergence.But clinical setting is complicated, needs sometimes
The laser that the angle of divergence is small is wanted, the laser for then needing the angle of divergence big sometimes.Utilize the angle of divergence for the laser that optical fiber transmission obtains
For the fixed angle of divergence, it is difficult to meet requirement of the different clinical applications to laser beam divergence.
In the technical solution of optical fiber provided by the invention, covering includes at least two attached bags being radially distributed from the inside to the outside
Layer, facilitates the applicable scene for widening the optical fiber, copes with complicated clinical setting.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Fig. 1 is the structural schematic diagram of the optical fiber 100 of one embodiment of the invention.Fig. 2 is optical fiber shown in FIG. 1 100 along A1A2
The sectional view in direction.Fig. 3 is sectional view of the optical fiber 100 shown in FIG. 1 along the direction C1C2.
Referring to figs. 1 to Fig. 3, a kind of optical fiber 100, comprising: fibre core 200；Covering 300, the covering 300 are sheathed on the fibre
Outside core 200.The covering 300 includes at least two attached bag layers being radially distributed from the inside to the outside.
As shown in Figure 1, the optical fiber 100 is cylindrical.The optical fiber 100 has opposite both ends, and wherein one end is sharp
Light incident side 101, the other end are laser output 102.The laser that laser light source projects enters institute by the laser light incident end 101
It states in optical fiber 100, is transmitted through the optical fiber 100, projected from the laser output 102.
As shown in Figures 2 and 3, the fibre core 200 and the covering 300 are cylindrical.The covering 300, which has, to be run through
The cavity at 300 both ends of covering, the cavity match with the fibre core 200.
In the present embodiment, laser can be transmitted through the fibre core 200, or be transmitted through the covering 300.In other embodiments
In, laser can also be transmitted through the fibre core 200 and the covering 300 simultaneously.
In the present embodiment, the refractive index of the fibre core 200 is 1.5.
In the present embodiment, the material of the fibre core 200 is quartz.The refractive index of quartz material is high, and high mechanical strength, curved
Qu Xingneng is good, it is not easy to be influenced by external electromagnetic radiation, therefore the material using quartz as the fibre core 200, so that institute
Fibre core 200 is stated with excellent optical transmission performance.
In the present embodiment, the diameter of the fibre core 200 is 550 microns.If the diameter of the fibre core 200 is excessive, so that logical
When crossing the transmission of fibre core 200 laser, it is easy to happen material dispersion and waveguide dispersion phenomenon, causes the laser of different wave length in institute
The transmission path difference stated in fibre core 200 is big, influences the laser intensity of output.If the diameter of the fibre core 200 is too small, the fibre
Core 200 and the coupling difficulty of laser light source are big, and the laser that laser light source projects is difficult to enter in the fibre core 200, cause to pass through
It is difficult that the fibre core 200 transmits laser.
In the present embodiment, the quantity of the attached bag layer is two.In other embodiments, the quantity of the attached bag layer may be used also
To be greater than two.
In the present embodiment, two attached bag layers are respectively the first attached bag layer 310 and the second attached bag layer 320, and described first
Attached bag layer 310 is sheathed on outside the fibre core 200, and the second attached bag layer 320 is sheathed on outside the first attached bag layer 310.
In the present embodiment, laser can be transmitted through the fibre core 200, or be transmitted through the first attached bag layer 310.At other
In embodiment, laser can also be transmitted through the fibre core 200 and the first attached bag layer 310 simultaneously.In addition, laser can also be through described
The transmission of second attached bag layer 320.
In the present embodiment, the fibre core 200 constitutes the first sub-assembly, first attached bag with the first attached bag layer 310
Layer 310 constitutes the second sub-assembly with the second attached bag layer 320, and the numerical aperture of first sub-assembly is less than described second group
The numerical aperture of component.
The numerical aperture of first sub-assembly influences the angle of divergence of the shoot laser transmitted through the fibre core 200.It is described
The numerical aperture of first sub-assembly is smaller, then the angle of divergence of the shoot laser through the fibre core 200 transmission is smaller.Described first group
The numerical aperture of component is bigger, then the angle of divergence of the shoot laser through the fibre core 200 transmission is bigger.
The numerical aperture of second sub-assembly influences the diverging of the shoot laser transmitted through the first attached bag layer 310
Angle.The numerical aperture of second sub-assembly is smaller, then the angle of divergence of the shoot laser through the first attached bag layer 310 transmission is got over
It is small.The numerical aperture of second sub-assembly is bigger, then the angle of divergence of the shoot laser through the first attached bag layer 310 transmission is got over
Greatly.
Since the numerical aperture of first sub-assembly is less than the numerical aperture of second sub-assembly, laser is in institute
It is small to state the angle of divergence transmitted in fibre core 200, and the angle of divergence that laser transmits in the first attached bag layer 310 is big.It can be according to not
Same applicable scene, flexible choice transmits laser using the fibre core 200 or the first attached bag layer 310, alternatively, utilizing institute
State fibre core 200 and the 310 simultaneous transmission laser of the first attached bag layer.Therefore the optical fiber 100 can satisfy different clinical fields
The requirement to laser beam divergence is closed, it is wide to be applicable in scene.
In the present embodiment, the numerical aperture of first sub-assembly is 0.22, and the angle of divergence is smaller, is passed through the fibre core 200
The area of the laser of defeated acquisition on the target tissue is small, the occasion for needing energy to concentrate suitable for tissue cutting, punching etc..
In the present embodiment, the numerical aperture of second sub-assembly is 0.37, and the angle of divergence is larger, through the first attached bag layer
The area of the laser that 310 transmission obtain on the target tissue is big, needs large area suitable for the hemostasis of multiple blutpunktes, the irradiation of light power etc.
The occasion of laser irradiation.
Radially from the inside to the outside, the refractive index of the attached bag layer is gradually reduced.In the present embodiment, the second attached bag layer
320 refractive index is less than the refractive index of the first attached bag layer 310.
The refractive index of the fibre core 200 is greater than the refractive index of the covering 300.Specifically, the refractive index of the fibre core 200
Greater than the refractive index of the attached bag layer of innermost layer.In the present embodiment, the refractive index of the fibre core 200 is greater than first attached bag
The refractive index of layer 310, thus guarantee to form total reflection when laser transmits in the fibre core 200 or the first attached bag layer 310,
To realize linear transfer.
The refractive index of the fibre core 200 is greater than the refractive index of the first attached bag layer 310, thus passing through the fibre core
When 200 transmission laser, laser forms total reflection between the fibre core 200 and the first attached bag layer 310, so that laser is by described
One end of fibre core 200 is transmitted to the other end.
Compared to the second attached bag layer 320, the refractive index of the first attached bag layer 310 is larger, thus by described
When first attached bag layer 310 transmits laser, laser is formed entirely between the first attached bag layer 310 and the second attached bag layer 320
Reflection, so that laser is transmitted to the other end by one end of the first attached bag layer 310.
In the present embodiment, the refractive index of the first attached bag layer 310 is 1.48.If the refraction of the first attached bag layer 310
Rate is excessive, so that the refractive index of the first attached bag layer 310 is greater than the refractive index of the fibre core 200, then laser is through the fibre
Core 200 can not form total reflection when transmitting, and laser is caused to form refraction between the fibre core 200 and the first attached bag layer 310,
Refraction effect causes laser to project outside the fibre core 200, so that major part or even whole laser gradually lose in transmission process
Fall, thus is difficult to laser being transmitted to the other end by one end of the fibre core 200.If the refractive index of the first attached bag layer 310
It is too small, cause the refractive index of the first attached bag layer 310 to be less than the refractive index of the second attached bag layer 320, then passes through described the
When one attached bag layer 310 transmits laser, laser can not be formed between the first attached bag layer 310 and the second attached bag layer 320
Total reflection, so that laser is reflected in the interface of the first attached bag layer 310 and the second attached bag layer 320, causes to swash
Anaclasis goes out outside the first attached bag layer 310, causes most of or even whole laser gradually to lose in transmission process, therefore
It is difficult to realize the transmission of laser by the first attached bag layer 310.
In addition, the refractive index and the first attached bag layer 310 of the numerical aperture of first sub-assembly and the fibre core 200
Refractive index it is related, the refractive index of the first attached bag layer 310 is appropriate, so that the numerical aperture of first sub-assembly meets
It is required that is, so that the numerical aperture of first sub-assembly is less than the numerical aperture of second sub-assembly.
In the present embodiment, the material of the first attached bag layer 310 is fluorine-doped quartz.The incorporation of fluorine element helps to reduce pure
The refractive index of quartz material, therefore compared to pure quartz material, the refractive index of fluorine-doped quartz material is lower.I.e. compared to the fibre
The refractive index of core 200, the first attached bag layer 310 is lower, to meet the requirement of laser transmission.
In the present embodiment, the first attached bag layer 310 with a thickness of 600 microns.The first attached bag layer 310 with a thickness of
The outer diameter of the first attached bag layer 310 and the half of internal diameter difference.If the thickness of the first attached bag layer 310 is excessive, swash
Light is easy to happen material dispersion and waveguide dispersion in through 310 transmission process of the first attached bag layer, causes swashing for different wave length
Transmission path difference of the light in the fibre core 200 is big, influences the laser intensity of output.If the thickness of the first attached bag layer 310
Spend small, the coupling difficulty of the first attached bag layer 310 and laser light source is big, and the laser that laser light source projects is difficult to enter described
In first attached bag layer 310, cause to transmit laser difficulty by the first attached bag layer 310.
In the present embodiment, the refractive index of the second attached bag layer 320 is 1.44.If the refraction of the second attached bag layer 320
Rate is excessive, so that the refractive index of the second attached bag layer 320 is greater than the refractive index of the first attached bag layer 310, then by described
First attached bag layer 310 transmit laser when, laser can not between the first attached bag layer 310 and the second attached bag layer 320 shape
At total reflection, laser is caused to reflect in the interface of the first attached bag layer 310 and the second attached bag layer 320, thus
It is difficult to laser being transmitted to the other end by one end of the first attached bag layer 310.If the refractive index mistake of the second attached bag layer 320
It is small, it is limited by the formation process level of the second attached bag layer 320, the difficulty for manufacturing the second attached bag layer 320 is big.
In addition, the numerical aperture of second sub-assembly and the first attached bag layer 310 and the second attached bag layer 320
Refractive index is related, and the refractive index of the second attached bag layer 320 is appropriate, so that the numerical aperture satisfaction of second sub-assembly is wanted
It asks, i.e., so that the numerical aperture of second sub-assembly is greater than the numerical aperture of first sub-assembly.
In the present embodiment, the material of the second attached bag layer 320 is plastics.
In the present embodiment, the second attached bag layer 320 with a thickness of 750 microns.The second attached bag layer 320 with a thickness of
The outer diameter of the second attached bag layer 320 and the half of internal diameter difference.If the thickness of the second attached bag layer 320 is blocked up, no
The necessary volume for increasing the optical fiber 100, so that big using the difficulty that the optical fiber 100 carries out medical operating operation.If institute
The thickness for stating the second attached bag layer 320 is excessively thin, and the second attached bag layer 320 is prone to wear, and causes outside the first attached bag layer 310
Dew, influences the optical transmission performance of the first attached bag layer 310.
In the present embodiment, the optical fiber 100 further include: coat 400, the coat 400 are sheathed on the covering 300
Outside.
The material of the coat 400 is elastic coating, and in the present embodiment, the material of the coat 400 includes propylene
Acid esters, silicon rubber and nylon.
The coat 400 helps avoid the impurity such as dust and pollutes 300 surface of covering, and can prevent the packet
300 surface abrasion of layer.
Correspondingly, the present invention also provides a kind of application method of above-mentioned optical fiber 100, including the optical fiber 100 is provided.
The application method further include: light source is provided, for issuing laser；The laser is transmitted through the fibre core 200, or
Person, the laser are transmitted through the covering 300.
In the present embodiment, the quantity of the attached bag layer is two.Two attached bag layers are respectively 310 He of the first attached bag layer
Second attached bag layer 320, the first attached bag layer 310 are sheathed on outside the fibre core 200, and the second attached bag layer 320 is sheathed on institute
It states outside the first attached bag layer 310.In other embodiments, the quantity of the attached bag layer can also be greater than two.
In the present embodiment, laser can be transmitted through the fibre core 200, or be transmitted through the first attached bag layer 310.In addition,
Laser can also be transmitted through the second attached bag layer 320.
In the present embodiment, on the one hand, when clinical application needs the small laser of the angle of divergence, such as utilizing laser cutting tumour
When, it may be selected to transmit laser using the fibre core 200, the laser beam divergence obtained through the fibre core 200 transmission is small, irradiation area
It concentrates, tumour fly-cutting can be fallen.On the one hand, when clinical application needs the big laser of the angle of divergence, for example, to it is multiple go out
It when blood clicks through whereabouts blood, may be selected to transmit laser using the first attached bag layer 310, be obtained through the first attached bag layer 310 transmission
Laser beam divergence it is big, irradiation area area is big, the case where convenient for observing multiple blutpunktes in time.
In the present embodiment, the optical fiber 100 further include: coat 400, the coat 400 are sheathed on the covering 300
Outside.
In other embodiments, the fibre core 200 and the covering 300 can be with laser described in simultaneous transmission.
In the present embodiment, laser is transmitted through the fibre core 200 and the first attached bag layer 310 simultaneously.
When the big laser of laser and the angle of divergence that clinical application needs the angle of divergence small simultaneously, by making the fibre core 200
And the 310 simultaneous transmission laser of the first attached bag layer, to meet requirement of the clinical application to laser beam divergence.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (11)
1. a kind of optical fiber characterized by comprising
Fibre core；
Covering, the covering are sheathed on outside the fibre core, and the covering includes at least two sons being radially distributed from the inside to the outside
Covering.
2. optical fiber as described in claim 1, which is characterized in that the refractive index of the fibre core is greater than the refractive index of the covering.
3. optical fiber as claimed in claim 2, which is characterized in that radially from the inside to the outside, the refractive index of the attached bag layer is gradually
Reduce, the refractive index of the fibre core is greater than the refractive index of the attached bag layer of innermost layer.
4. optical fiber as described in any one of claims 1 to 3, which is characterized in that when the quantity of the attached bag layer is two, two
A attached bag layer is respectively the first attached bag layer and the second attached bag layer, and the second attached bag layer is sheathed on the first attached bag layer
Outside.
5. optical fiber as claimed in claim 4, which is characterized in that the fibre core constitutes first with the first attached bag layer and combines
Part, the first attached bag layer and the second attached bag layer constitute the second sub-assembly, and the numerical aperture of first sub-assembly is less than
The numerical aperture of second sub-assembly.
6. optical fiber as claimed in claim 5, which is characterized in that the numerical aperture of first sub-assembly is 0.22, described the
The numerical aperture of two sub-assemblies is 0.37.
7. optical fiber as claimed in claim 6, which is characterized in that the refractive index of the fibre core is 1.5, the first attached bag layer
Refractive index is 1.48, and the refractive index of the second attached bag layer is 1.44.
8. optical fiber as claimed in claim 7, which is characterized in that the material of the fibre core is quartz, the first attached bag layer
Material is fluorine-doped quartz, and the material of the second attached bag layer is plastics.
9. optical fiber as claimed in claim 7, which is characterized in that the diameter of the fibre core is 550 microns, the first attached bag layer
With a thickness of 600 microns, the second attached bag layer with a thickness of 750 microns.
10. optical fiber as described in claim 1, which is characterized in that further include: coat, the coat are sheathed on the packet
Layer is outer.
11. a kind of optical fiber application method, which is characterized in that including providing optical fiber as described in any one of claim 1 to 10.
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| CN201910717031.1A CN110471139A (en) | 2019-08-05 | 2019-08-05 | Optical fiber and its application method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910717031.1A CN110471139A (en) | 2019-08-05 | 2019-08-05 | Optical fiber and its application method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111552026A (en) * | 2020-04-10 | 2020-08-18 | 桂林电子科技大学 | Optical fiber and system for human body intervention visual photodynamic therapy |
| CN114288017A (en) * | 2021-12-31 | 2022-04-08 | 华科精准（北京）医疗科技有限公司 | Treatment optical fiber and laser thermotherapy system comprising same |
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| CN111552026A (en) * | 2020-04-10 | 2020-08-18 | 桂林电子科技大学 | Optical fiber and system for human body intervention visual photodynamic therapy |
| CN114288017A (en) * | 2021-12-31 | 2022-04-08 | 华科精准（北京）医疗科技有限公司 | Treatment optical fiber and laser thermotherapy system comprising same |
| CN114288017B (en) * | 2021-12-31 | 2024-02-02 | 华科精准（北京）医疗科技有限公司 | Treatment optical fiber and laser thermal therapy system comprising same |
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