AU2020100960A4 - An Anderson localizing optical fiber with the annular optical waveguide channel and its preparation method - Google Patents

An Anderson localizing optical fiber with the annular optical waveguide channel and its preparation method Download PDF

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AU2020100960A4
AU2020100960A4 AU2020100960A AU2020100960A AU2020100960A4 AU 2020100960 A4 AU2020100960 A4 AU 2020100960A4 AU 2020100960 A AU2020100960 A AU 2020100960A AU 2020100960 A AU2020100960 A AU 2020100960A AU 2020100960 A4 AU2020100960 A4 AU 2020100960A4
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anderson
optical waveguide
localizing
waveguide channel
optical fiber
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AU2020100960A
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Shitai Yang
Libo Yuan
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Guilin University of Electronic Technology
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Guilin University of Electronic Technology
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    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00112—Connection or coupling means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
    • A61B1/0017—Details of single optical fibres, e.g. material or cladding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/042—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by a proximal camera, e.g. a CCD camera
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4848—Monitoring or testing the effects of treatment, e.g. of medication
    • 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
    • G02B6/02042—Multicore optical fibres
    • 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
    • G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
    • G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
    • G02B6/02366—Single ring of structures, e.g. "air clad"
    • 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
    • G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
    • G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
    • G02B6/0238—Longitudinal structures having higher refractive index than background material, e.g. high index solid rods
    • 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
    • G02B6/03605—Highest refractive index not on central axis
    • G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
    • 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
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00577—Ablation
    • 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
    • A61B2018/2205—Characteristics of fibres
    • A61B2018/2222—Fibre material or composition

Abstract

The invention provides an Anderson localizing optical fiber with the annular optical waveguide channel. Its characteristics are: it includes an Anderson localizing optical waveguide channel, an annular core optical waveguide channel distributed around the Anderson localizing optical waveguide channel and a cladding. Among them, the Anderson localizing optical waveguide channel can laterally and locally limit the optical field, causing the optical field distribution to remain stable during the transmission process. The invention can be used for the image transmission channel of the endoscopic imaging system, and is especially suitable for the imaging diagnosis and treatment of the internal damage of fine tissues such as arteries and blood vessels. 1/3 DRAWINGS 1 FIG1 2-2 FIG.1 02 0 2-2 FIG.2

Description

1/3 DRAWINGS
1
FIG1
FIG.1
02
0 2-2
2-2 FIG.2
DESCRIPTION TITLE OF INVENTION
An Anderson localizing optical fiber with the annular optical waveguide channel and its
preparation method
TECHNICAL FIELD
[0001] The present invention relates to An Anderson localizing optical fiber with the annular
optical waveguide channel and its preparation method, and belongs to the technical field of
optical fiber.
BACKGROUND ART
[0002] Real-time imaging techniques of cell morphology and biological tissue structure in living
organisms play a vital role in basic research and clinical applications of biomedicine. For
traditional microscopic imaging technology, it is extremely difficult to obtain image information
inside living organs or tissues. Although people have used the characteristics of optical fiber
imaging systems that are easy to miniaturize and bend freely to initially solve such imaging
technical problems, traditional optical fiber imaging systems still face many bottlenecks. These
problems are mainly concentrated in the following points: 1. Poor compatibility with broadband
light sources; 2. Huge imaging unit size and complex structure; 3. Low imaging quality and slow
imaging speed; 4. Poor robustness.
[0003] For example, widely used multi-core optical fibers and multi-mode optical fibers have
strong mode coupling and low mode density. Any external mechanical disturbance or
temperature change will change the mode coupling and seriously reduce the image quality. The
existing image processing technology usually requires expensive and complicated experimental
equipment. These experimental devices are usually sensitive to environmental noise, difficult to
be compatible with broadband light sources, and have low imaging quality and slow imaging
speed.
[0004] The Anderson localizing optical fiber refers to the lateral disordered refractive index
structure of the optical fiber that can generate strong lateral scattering of the light wave, resulting
in the light wave being constrained by the lateral localized area and freely propagating along the
longitudinal direction. Therefore, these fibers not only exhibit the multimode transmission
characteristics of large-core fibers, but most of the modes are highly localized. This feature
makes them ideal for image transmission applications.
[0005] It is reported that Jian Zhao et al. prepared a flexible, lensless imaging system using
glass-air hole structured Anderson localizing optical fibers (Zhao J, Sun Y, Zhu Z, et al. Deep
Learning Imaging through Fully-Flexible Glass-Air Disordered Fiber [J]. ACS Photonics, 2018.).
The system takes advantage of the Anderson localizing fiber's lateral limitation of light waves,
combined with deep learning algorithms, to achieve high-quality imaging of objects which are a
few millimeters away from the end of the fiber, showing the Anderson localizing fiber on
flexible fiber optic endoscopes great application prospects.
[0006] For the endoscope system, the illumination light source is an important component. The
above literature suggests that the Anderson fiber can be used for imaging, but it cannot achieve
the function of transmitting illumination light within the same fiber. This means that when
constructing an endoscope-like system, this optical fiber needs to be combined with the
illumination light source to transmit the optical fiber. This undoubtedly increases the number of optical fibers that intervene in the human body, resulting in larger diameter devices.
SUMMARY OF INVENTION
[0007] The object of the invention is to provide an Anderson localizing optical fiber with the annular optical waveguide channel and its preparation method
[0008] The purpose of the invention is achieved as follows:
[0009] An Anderson localizing optical fiber with the annular optical waveguide channel. It includes an Anderson localizing optical waveguide channel, an annular core optical waveguide channel distributed around the Anderson localizing optical waveguide channel and a cladding.
[0010] The Anderson localizing optical waveguide channel in the composition is composed of quartz and randomly distributed air holes, capable of stable transmission Anderson Localization Mode.
[0011] The annularly distributed optical waveguide channel in the composition is coaxially distributed with the Anderson localizing optical waveguide channel, and may be a single annular core or multiple cores distributed uniformly and discretely on the circumference.
[0012] The total area of the randomly distributed air holes constituting the Anderson localizing optical waveguide channel accounts for 25% - 50% of the entire channel area, the diameter of the air holes is randomly distributed between 0.1 X- 10 k, and k is the wavelength of transmitted light.
[0013]A preparation method of the Anderson localizing optical fiber with the annular optical
waveguide channel:
[0014] Step 1: Take a large core multi-mode optical fiber preform and make holes in the core of
the preform to make the annular core preform with holes;
[0015] Step 2: Take a thin wall quartz tube, stack hollow small diameter quartz tubes with
different pore diameters into the thin wall quartz tube, and draw under pressure control in a high
temperature furnace to form a batch of porous preforms with different diameters and randomly
distributed holes;
[0016]Step 3: Take a thin wall quartz tube, insert a batch of porous preforms from step 2 into the
thin wall quartz tube, and then draw under pressure control in a high-temperature furnace to form
Anderson localizing optical waveguide preforms.
[0017] Step 4: Insert the Anderson localizing optical waveguide preform prepared in Step 3 into
the preform prepared in Step 1, combine it into a new preform and draw under pressure control
in a high-temperature furnace to prepare the Anderson localizing optical fiber with the annular
optical waveguide channel.
[0018]The invention has the following notable advantages:
[0019] (1) An Anderson localizing optical waveguide channel, it can be used as an image
transmission fiber, which is much smaller than traditional imaging fiber bundles.
[0020] (2) An optical waveguide structure with an annular distribution can be used as an
illumination beam transmission channel, so that optical fiber illumination and image collection
and transmission are integrated into a single optical fiber, and is particularly suitable for in vivo
diagnosis and treatment of diseases.
BRIEF DESCRIPTION OF DRAWINGS
[0021] FIG. 1 shows an Anderson localizing optical fiber with the annular optical waveguide
channel 1 with the core 1-1 is annular core of optical waveguide channel and an Anderson
localizing optical fiber channel 1-2.
[0022] FIG. 2 shows an Anderson localizing optical fiber with the annular optical waveguide
channels 2 with the uniformly distributed multiple circular cores 2-1 and an Anderson localizing
optical fiber channel 2-2.
[0023] FIG. 3 is an embodiment of the optical fiber proposed in the invention for the treatment
of endovascular thrombus clearance.
[0024] FIG. 4 - FIG. 7 show four steps in the preparation of an Anderson localizing fiber with an
annular optical waveguide channel.
DESCRIPTION OF EMBODIMENTS
[0025]A specific embodiment is taken to further illustrate the present invention.
[0026] Embodiment 1: the invention is applied to an example of the treatment of endovascular thrombus clearance.
[0027]The structure of the optical fiber proposed by the present invention may be various, for example, it may be a structure having an annular core channel 1-1 and an Anderson localizing waveguide channel 1-2 as shown in FIG. 1; or as shown in FIG. 2, the structure has annularly distributed circular cores channels 2-1 and an Anderson local waveguide channel 2-2. This embodiment will take the optical fiber with the structure shown in FIG. 1 as an example to illustrate the practical application of the present invention in the treatment of endovascular thrombus clearance.
[0028] The entire system is shown in FIG. 3. The system includes an incoherent broadband illumination light source 2, a surgical laser light source 3 with adjustable power, an optical fiber wavelength division multiplexer 4, an optical fiber side polished coupler 5, an Anderson localizing optical fiber 1 with an annular optical waveguide, and a camera system 9.
[0029] The optical fiber side polished coupler 5 is to side polish the single-mode optical fiber 6 and the Anderson localizing optical fiber 1 with the annular waveguide respectively, and then fit the side polished surface to make the single-mode optical fiber 6 and the Anderson localizing optical fiber with the annular waveguide coupled. In this way, not only the input light 7 in the single-mode fiber 6 can be coupled into the annular core, but also the light wave 8 containing image information can be stably transmitted through the Anderson localizing waveguide channel.
[0030] Among them, the illumination light source 2 uses an LED light source with a center
wavelength of 460 nm; the surgical laser light source 3 uses an infrared semiconductor laser with
a wavelength of 810 nm, and the power is adjustable from 0 to 3 W; the camera system 9 uses a
CCD detector, and an infrared cut-off filter is in front of the detector light sheet to prevent the
surgical laser from reaching the detector and affecting the imaging effect.
[0031]As shown in FIG. 3, the probe prepared by the optical fiber proposed by the present
invention is inserted into the arterial blood vessel 10 through a puncture needle. In order to find
the accurate thrombus area 11, it is necessary to obtain image information in the blood vessel 10.
When the illumination light source 2 is turned on, the illumination beam provides illumination
for the entire blood vessel. The scattered light of the tissue in the blood vessel 10 is collected and
transmitted by the Anderson localizing optical waveguide channel of the optical fiber. After
passing through the objective lens, the signal light is imaged on the CCD.
[0032] After adjusting the position of the optical fiber probe in the blood vessel until the image
acquisition system acquires the image of the thrombus area 11, the surgical laser light source 3 is
turned on, the power level is adjusted, and the thrombus is ablated.
[0033] The state of thrombus clearance in the blood vessel is monitored by the image acquisition
system until the thrombus is completely cleared.
[0034] Embodiment 2: a preparation method of this invention:
[0035] FIG. 4 to FIG. 7 show preparation steps of the optical fiber with the structure shown in FIG. 1. Specifically, it is divided into four steps, wherein, step 1 is for preparing the preform of the annular core waveguide structure in the optical fiber, steps 2 ~ 3 are for preparing the preform of the Anderson localizing optical waveguide channel in the middle of the fiber, and step 4 is the combination the above two preforms which are drawn into fibers in high temperature.
[0036] Step 1: Take a multi-mode optical fiber quartz preform 12 with a large-diameter germanium-doped core and pure quartz cladding, and use an ultrasonic drilling machine to drill holes in the core of the preform to prepare the annular core preform 13 with holes, which includes an inner wall 13-1 of an annular core and an intermediate hole 13-2, as shown in the right side of FIG. 4.
[0037] Step 2: Take a large diameter thin wall quartz tube 15 and a plurality of quartz capillaries 14 with different inner diameters, and use the rod assembly method to randomly fill the quartz capillary 14 with the holes of the thin wall quartz tube 15 at a high temperature, the combined rods are controlled to be drawn into porous silica capillaries 16 with different diameters.
[0038] Step 3: Take a large diameter thin wall quartz tube 15 and randomly stack the porous silica capillaries 16 of different diameters drawn in step 2 with a large diameter thin wall quartz tube 15 and control again at high temperature. It is pressed into thin rods to form preforms 17 with randomly distributed Anderson localizing waveguide channels.
[0039] Step 4: Insert the preform 17 of the Anderson localizing waveguide channel prepared in step 3 into the perforated annular core preform 13 obtained in step 1, and control the pressure and draw into fiber at high temperature, as shown in FIG. 1 the Anderson localizing fiber with an annular core 1.
[0040] In the descriptions and drawings, typical embodiments of the present invention have been disclosed. The invention is not limited to these exemplary embodiments. The specific terms are only used for generality and illustrative meaning, and are not intended to limit the protected scope of the present invention.

Claims (5)

1. An Anderson localizing optical fiber with the annular optical waveguide channel,
characterized in that: it includes an Anderson localizing optical waveguide channel, an annular
core optical waveguide channel distributed around the Anderson localizing optical waveguide
channel and a cladding.
2. An Anderson localizing optical fiber with the annular optical waveguide channel
according to claim 1, characterized in that the Anderson localizing optical waveguide channel in
the composition is composed of quartz and randomly distributed air holes, capable of stable
transmission Anderson Localization Mode.
3. An Anderson localizing optical fiber with the annular optical waveguide channel
according to claim 1, characterized in that: the annularly distributed optical waveguide channel
in the composition is coaxially distributed with the Anderson localizing optical waveguide
channel, and may be a single annular core or multiple cores distributed uniformly and discretely
on the circumference.
4. An Anderson localizing optical fiber with the annular optical waveguide channel
according to any one of claims 1-2, characterized in that: the total area of the randomly
distributed air holes constituting the Anderson localizing optical waveguide channel accounts for
% ~ 50% of the entire channel area, the diameter of the air holes is randomly distributed
between 0. 1X 10 X, and X is the wavelength of transmitted light.
5. A preparation method of the Anderson localizing optical fiber with the annular optical
waveguide channel, characterized in that:
Step 1: Take a large core multi-mode optical fiber preform and make holes in the core of
the preform to make the annular core preform with holes;
Step 2: Take a thin wall quartz tube, stack hollow small diameter quartz tubes with
different pore diameters into the thin wall quartz tube, and draw under pressure control in
a high-temperature furnace to form a batch of porous preforms with different diameters
and randomly distributed holes;
Step 3: Take a thin wall quartz tube, insert a batch of porous preforms from step 2 into
the thin wall quartz tube, and then draw under pressure control in a high-temperature
furnace to form Anderson localizing optical waveguide preforms
Step 4: Insert the Anderson localizing optical waveguide preform prepared in Step 3 into
the preform prepared in Step 1, combine it into a new preform and draw under pressure
control in a high-temperature furnace to prepare the Anderson localizing optical fiber
with the annular optical waveguide channel.
AU2020100960A 2020-06-08 2020-06-08 An Anderson localizing optical fiber with the annular optical waveguide channel and its preparation method Ceased AU2020100960A4 (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

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