US20040028346A1 - Polishing pad for polishing optical fiber connectors - Google Patents

Polishing pad for polishing optical fiber connectors Download PDF

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Publication number
US20040028346A1
US20040028346A1 US10/602,477 US60247703A US2004028346A1 US 20040028346 A1 US20040028346 A1 US 20040028346A1 US 60247703 A US60247703 A US 60247703A US 2004028346 A1 US2004028346 A1 US 2004028346A1
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Prior art keywords
microns
optical fibers
main body
polishing
sponge
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Abandoned
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US10/602,477
Inventor
Tetsuya Baba
Jun Tamura
Vuong Bang
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Nihon Micro Coating Co Ltd
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Nihon Micro Coating Co Ltd
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Priority to US10/602,477 priority Critical patent/US20040028346A1/en
Publication of US20040028346A1 publication Critical patent/US20040028346A1/en
Abandoned legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3873Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3885Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/22Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B19/226Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground of the ends of optical fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00Lapping machines or devices; Accessories
    • B24B37/04Lapping machines or devices; Accessories designed for working plane surfaces
    • B24B37/042Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3861Adhesive bonding
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3863Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using polishing techniques

Definitions

  • This invention relates to a method of polishing optical fiber connectors and a device which is used in such a method. More particularly, this invention relates to a polishing method as a part of a production process for connectors each with a plurality of optical fibers protruding from a front surface of a main body and a pad which is used in such a polishing process such that the variations in the length of protrusion can be reduced and the protruding optical fibers will each have a flatter front surface.
  • Optical fiber connectors of this type have been known, and it has also been known to polish such optical fiber connectors by using a fibrous material such as comprising nylon and polyethylene with abrasive particles attached thereto and without using a slurry.
  • This method is less than satisfactory for many reasons such that the process takes too long a time, that the finished surfaces tend to be scratched and that sufficient protrusions cannot be obtained.
  • Such prior art methods have not been able to sufficiently control the protrusions of the individual optical fibers such that the variations among the protrusions of the individual fibers were relatively large and the tips of the protruding optical fibers were not sufficiently even, smooth or flat, tending to become thinner near the front end.
  • a method embodying this invention may be characterized as comprising the steps of carrying out a preferential etching step of the front surface by using a textile pad free of abrading particles affixed thereto and a slurry containing abrading particles of a relatively larger size and thereafter polishing front portions of the optical fibers with a polishing pad with a porous and compressive sponge-like material without abrading particles affixed thereto and a slurry of another kind containing relatively smaller abrading particles.
  • a sponge-like material may comprise polyurethane and is required to have hardness within a specified range.
  • FIG. 1 is a greatly enlarged schematic perspective view of an optical fiber connector produced by a method embodying this invention
  • FIG. 2 is a schematic sectional side view of the optical fiber connector of FIG. 1 at a stage during a course of its production before epoxy is removed;
  • FIG. 3 is a schematic sectional side view of the optical fiber connector of FIG. 2 after the first two steps of a polishing method of this invention have been carried out;
  • FIG. 4 is a schematic sectional side view of the optical fiber connector of FIG. 2 after the third step of the polishing method of this invention has been carried out;
  • FIG. 5 is a schematic sectional side view of a polishing pad used in the fourth step of the polishing method of this invention.
  • FIG. 6 is a schematic sectional side view of the optical fiber connector of FIG. 2 after the fourth step of the polishing method of this invention has been carried out.
  • FIG. 1 shows schematically an example of optical fiber connector 10 produced by a method embodying this invention.
  • the optical fiber connector 10 is characterized as comprising a main body 15 (say, of a plastic material containing glass particles for providing desired physical characteristics), having a flat front surface 20 , an oppositely facing back surface 25 and a plurality of optical fibers 30 which extend through throughholes 22 provided through the main body 15 from the back surface 25 to the front surface 20 , protruding from the front surface 20 by a specified length which may be in the range of 1-3 microns or greater and being secured in the respective throughholes 22 by epoxy (not shown).
  • a main body 15 say, of a plastic material containing glass particles for providing desired physical characteristics
  • optical fibers 30 which extend through throughholes 22 provided through the main body 15 from the back surface 25 to the front surface 20 , protruding from the front surface 20 by a specified length which may be in the range of 1-3 microns or greater and being secured in the respective throughholes 22 by epoxy (not shown).
  • FIG. 2 shows the optical fiber connector 10 at one stage during the course of its production after the optical fibers 30 have each been secured inside respective one of the throughholes 22 by epoxy 35 .
  • a method of producing optical fiber connectors as shown in FIG. 1 from the stage shown in FIG. 2 may be described as including the following four steps, that is, the steps of removing the epoxy, rough polishing, preferential removal of the main body material and a final fine polishing.
  • a polishing machine of a known kind capable of loading a plurality of target objects to be polished and provided with a rotary disc and a mechanism for causing each of these loaded target objects to constantly come into contact with a new portion of a polishing pad removably attached to the rotary disc.
  • the first two of the four steps referred to above are carried out in conventional ways and hence will not be described in detail.
  • the first step of epoxy removal may be carried out, for example, by using a polishing film with abrading particles of silicon carbide with diameters about 16 microns on the rotary disc of such a polisher.
  • the second step of rough polishing may be carried out, for example, by using a polishing film with abrading particles of silicon carbide with diameters about 5 microns.
  • the third step is for preferentially etching off the front surface 20 of the main body 15 relative to the optical fibers 30 such that the optical fibers 30 remain protruding from the front surface 20 , as shown in FIG. 4.
  • a pad of textile material such as nylon or polyethylene without any abrading particles affixed thereonto.
  • a slurry containing abrading particles with average diameter in the range of 1-4 microns in an amount of 20-40% (hereinafter also referred to as “the first slurry”) is used together with the textile pad.
  • the abrading particles may comprise aluminum oxide or silicon carbide.
  • the fourth step is for final fine polishing for making the front surfaces of the protruding optical fibers 30 flatter, smoother and more even.
  • a polishing pad 50 according to this invention, as shown schematically in FIG. 5.
  • This polishing pad 50 is characterized as comprising a layer of sponge-like material 52 with thickness in the range of 300-1500 microns attached to an adhesive tape 54 .
  • the sponge-like material may be porous polyurethane with hardness in the range of 20-80 duro, having pores with sizes in the range of 20-100 microns.
  • compressibility and elasticity it may be characterized as having compressibility in the range of 5-40% and elasticity in the range of 30-120%.
  • the compressibility and elasticity are the values obtained from a sample piece of a suitable size by measuring its thickness To while compressing it with an initial load of 80 g, further adding an extra load of 800 g for 5 minutes and measuring its thickness T 1 afterward, removing this total load of 880 g and thereafter subjecting it to the initial load of 80 g for 30 seconds to measure its thickness T 0 ′ again.
  • the compressibility is calculated as 100(T 0 -T 1 )/T 0 and the compressive elasticity is calculated as 100 (T 0 ′-T 1 )/(T 0 -T 1 ).
  • the polishing pad 50 itself does not include any abrading particles.
  • a slurry of another kind containing abrading particles such as cerium oxide, diamond and aluminum oxide particles
  • abrading particles such as cerium oxide, diamond and aluminum oxide particles
  • the second slurry a slurry of another kind containing abrading particles with an average diameter in the range of 0.1-2.0 microns in an amount of about 20%.
  • test experiments carried out by the present inventors showed that optical fibers connectors with optical fibers protruding from the main body by an average length in the range of 1-4 microns could be obtained by a method embodying this invention, with variations in the length of protrusion less than 0.5 microns and the difference in the length of protrusion between mutually adjacent pair of optical fibers less than 0.2 microns.
  • the surface roughness of the optical fibers 30 thus polished was measured by means of an atomic force microscope (produced by Digital Instrument, Inc).
  • the surface roughness R a was 1.9 nm (at scan size 50 ⁇ 50 microns).
  • an optical fiber connector with only two optical fibers passing through a main body was polished by a conventional method.
  • the surface roughness R a was 5.2 nm (at scan size 50 ⁇ 50 microns).
  • a method according to this invention can polish a multi-fiber optical fiber connector (even of a kind with many more than two optical fibers therethrough) such that the polished optical fibers protrude from the front surface of the main body by an increased length (more than 1 micron and even more than 3 microns), that the front surfaces of the protruding optical fibers have reduced surface roughness and that the front surface of the main body is left with less visible scratches.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

Optical fiber connectors each with a plurality of optical fibers protruding from the front surface of a main body by improved and uniform distances are produced by being subjected to an etching step in which a textile pad free of abrading particles and a slurry containing abrading particles of a relatively larger size are used and thereafter to a final fine polishing step in which a polishing pad with a porous and compressive sponge-like material without affixed abrading particles and a slurry of another kind containing relatively smaller abrading particles are used. The sponge-like material may be polyurethane and is required to have hardness and pores with sizes within specified ranges.

Description

    BACKGROUND OF THE INVENTION
  • This invention relates to a method of polishing optical fiber connectors and a device which is used in such a method. More particularly, this invention relates to a polishing method as a part of a production process for connectors each with a plurality of optical fibers protruding from a front surface of a main body and a pad which is used in such a polishing process such that the variations in the length of protrusion can be reduced and the protruding optical fibers will each have a flatter front surface. [0001]
  • Optical fiber connectors of this type have been known, and it has also been known to polish such optical fiber connectors by using a fibrous material such as comprising nylon and polyethylene with abrasive particles attached thereto and without using a slurry. This method, however, is less than satisfactory for many reasons such that the process takes too long a time, that the finished surfaces tend to be scratched and that sufficient protrusions cannot be obtained. More significantly, such prior art methods have not been able to sufficiently control the protrusions of the individual optical fibers such that the variations among the protrusions of the individual fibers were relatively large and the tips of the protruding optical fibers were not sufficiently even, smooth or flat, tending to become thinner near the front end. [0002]
  • SUMMARY OF THE INVENTION
  • It is therefore an object of this invention to provide a new method of polishing optical fiber connectors with a plurality of optical fibers therethrough such that the optical fibers protrude from the front surface of a main body by an improved length of 1-3 microns and preferably longer with reduced variations and have flatter, smoother and more even front surfaces than was possible with prior art methods. [0003]
  • It is another object of the invention to provide a polishing pad with which such improved optical fibers can be produced. [0004]
  • A method embodying this invention, with which the above and other objects can be accomplished, may be characterized as comprising the steps of carrying out a preferential etching step of the front surface by using a textile pad free of abrading particles affixed thereto and a slurry containing abrading particles of a relatively larger size and thereafter polishing front portions of the optical fibers with a polishing pad with a porous and compressive sponge-like material without abrading particles affixed thereto and a slurry of another kind containing relatively smaller abrading particles. Such a sponge-like material may comprise polyurethane and is required to have hardness within a specified range. By a method of this invention with the use of a polishing pad as described above, optical fiber connectors with a plurality of fibers can be produced with the optical fibers protruding by longer distances and more uniformly, and having smoother front surfaces.[0005]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a greatly enlarged schematic perspective view of an optical fiber connector produced by a method embodying this invention; [0006]
  • FIG. 2 is a schematic sectional side view of the optical fiber connector of FIG. 1 at a stage during a course of its production before epoxy is removed; [0007]
  • FIG. 3 is a schematic sectional side view of the optical fiber connector of FIG. 2 after the first two steps of a polishing method of this invention have been carried out; [0008]
  • FIG. 4 is a schematic sectional side view of the optical fiber connector of FIG. 2 after the third step of the polishing method of this invention has been carried out; [0009]
  • FIG. 5 is a schematic sectional side view of a polishing pad used in the fourth step of the polishing method of this invention; and [0010]
  • FIG. 6 is a schematic sectional side view of the optical fiber connector of FIG. 2 after the fourth step of the polishing method of this invention has been carried out.[0011]
  • DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 shows schematically an example of optical fiber connector [0012] 10 produced by a method embodying this invention. The optical fiber connector 10 is characterized as comprising a main body 15 (say, of a plastic material containing glass particles for providing desired physical characteristics), having a flat front surface 20, an oppositely facing back surface 25 and a plurality of optical fibers 30 which extend through throughholes 22 provided through the main body 15 from the back surface 25 to the front surface 20, protruding from the front surface 20 by a specified length which may be in the range of 1-3 microns or greater and being secured in the respective throughholes 22 by epoxy (not shown). Although twelve optical fibers 30 are shown linearly arranged through the main body 15, neither the number of the optical fibers 30 nor their arrangement is intended to limit the scope of this invention. On the other hand, it is to be remembered that the present invention is particularly useful for connectors with many more than 2 optical fibers passing through and supported by a main body.
  • FIG. 2 shows the optical fiber connector [0013] 10 at one stage during the course of its production after the optical fibers 30 have each been secured inside respective one of the throughholes 22 by epoxy 35. A method of producing optical fiber connectors as shown in FIG. 1 from the stage shown in FIG. 2 may be described as including the following four steps, that is, the steps of removing the epoxy, rough polishing, preferential removal of the main body material and a final fine polishing. For carrying out all four of these steps, use may be suitably made of a polishing machine of a known kind capable of loading a plurality of target objects to be polished and provided with a rotary disc and a mechanism for causing each of these loaded target objects to constantly come into contact with a new portion of a polishing pad removably attached to the rotary disc.
  • The first two of the four steps referred to above are carried out in conventional ways and hence will not be described in detail. The first step of epoxy removal may be carried out, for example, by using a polishing film with abrading particles of silicon carbide with diameters about 16 microns on the rotary disc of such a polisher. The second step of rough polishing may be carried out, for example, by using a polishing film with abrading particles of silicon carbide with diameters about 5 microns. After these first two steps have been carried out, the optical fiber connector [0014] 10 will look as shown in FIG. 3, with the front surface 20 of the main body 15 roughly flat and the front surfaces of the optical fibers 30 substantially flush with this substantially flattened front surface 20 of the main body 15.
  • The third step is for preferentially etching off the [0015] front surface 20 of the main body 15 relative to the optical fibers 30 such that the optical fibers 30 remain protruding from the front surface 20, as shown in FIG. 4. For this preferential etching of the front surface 20 in the third step, use is made of a pad of textile material such as nylon or polyethylene without any abrading particles affixed thereonto. For the etching, a slurry containing abrading particles with average diameter in the range of 1-4 microns in an amount of 20-40% (hereinafter also referred to as “the first slurry”) is used together with the textile pad. The abrading particles may comprise aluminum oxide or silicon carbide. The use of such a textile pad and such a slurry can effectively etch the front surface 20 of the main body 15 without unnecessarily etching side surfaces of the optical fibers 30. In other words, the optical fibers 30 do not become pointed towards the tip as they tend to become by a prior art method of preferential etching.
  • The fourth step is for final fine polishing for making the front surfaces of the protruding [0016] optical fibers 30 flatter, smoother and more even. For this process, use is made of a polishing pad 50 according to this invention, as shown schematically in FIG. 5. This polishing pad 50 is characterized as comprising a layer of sponge-like material 52 with thickness in the range of 300-1500 microns attached to an adhesive tape 54. The sponge-like material may be porous polyurethane with hardness in the range of 20-80 duro, having pores with sizes in the range of 20-100 microns.
  • In terms of compressibility and elasticity, it may be characterized as having compressibility in the range of 5-40% and elasticity in the range of 30-120%. The compressibility and elasticity are the values obtained from a sample piece of a suitable size by measuring its thickness To while compressing it with an initial load of 80 g, further adding an extra load of 800 g for 5 minutes and measuring its thickness T[0017] 1 afterward, removing this total load of 880 g and thereafter subjecting it to the initial load of 80 g for 30 seconds to measure its thickness T0′ again. The compressibility is calculated as 100(T0-T1)/T0 and the compressive elasticity is calculated as 100(T0′-T1)/(T0-T1). The polishing pad 50 itself does not include any abrading particles. For the final fine finishing process, use is additionally made of a slurry of another kind containing abrading particles (such as cerium oxide, diamond and aluminum oxide particles) with an average diameter in the range of 0.1-2.0 microns in an amount of about 20% (hereinafter also referred to as “the second slurry”). The use of such a pad of a sponge-like material without abrading particles affixed thereto and a slurry of the aforementioned property can effectively flatten the front surfaces of the optical fibers 30 left protruding from the front surface 20 of the main body 15, as shown schematically in FIG. 6. Test experiments carried out by the present inventors showed that optical fibers connectors with optical fibers protruding from the main body by an average length in the range of 1-4 microns could be obtained by a method embodying this invention, with variations in the length of protrusion less than 0.5 microns and the difference in the length of protrusion between mutually adjacent pair of optical fibers less than 0.2 microns.
  • The surface roughness of the [0018] optical fibers 30 thus polished was measured by means of an atomic force microscope (produced by Digital Instrument, Inc). The surface roughness Ra was 1.9 nm (at scan size 50×50 microns). As a comparison test, an optical fiber connector with only two optical fibers passing through a main body was polished by a conventional method. The surface roughness Ra was 5.2 nm (at scan size 50×50 microns). This shows clearly that a method according to this invention can polish a multi-fiber optical fiber connector (even of a kind with many more than two optical fibers therethrough) such that the polished optical fibers protrude from the front surface of the main body by an increased length (more than 1 micron and even more than 3 microns), that the front surfaces of the protruding optical fibers have reduced surface roughness and that the front surface of the main body is left with less visible scratches.
  • The invention was described above by way of only one example and as applied to an optical connector of only one kind, but this example is not intended to limit the scope of the invention. Many modifications and variations are possible within the scope of the invention. For example, the number and arrangement of optical fibers through a main body of each of the connectors to be polished do not limit the scope of the invention. No example of polishing machine was disclosed but any commonly available machine, say, with a rotary disc, may be used in connection with this invention. The front surfaces of the optical fibers need not be polished so as to be perpendicular to the direction of their extension. In other words, the present invention applies equally well to the polishing of so-called angled fibers with front surfaces sloped with respect to the direction of their extension. In summary, all such modifications and variations that may be apparent to a person skilled in the art are considered to be within the scope of this invention. [0019]

Claims (17)

What is claimed is:
1. A method of polishing an optical fiber connector, said method comprising the steps of:
providing an optical fiber connector which comprises a main body having a front surface, an opposing back surface, a plurality of throughholes extending therethrough from said back surface to said front surface, and optical fibers each extending through a respective one of said throughholes and having a front end portion exposed at said front surface of said main body;
polishing said front surface of said main body with a textile pad free of abrading particles affixed thereto and a first slurry, said textile pad etching said front surface preferentially relative to said optical fibers such that the front end portions of said optical fibers protrude beyond the preferentially etched front surface of said main body; and
thereafter polishing said front portions of said optical fibers with a porous and compressive sponge-like material without abrading particles affixed thereto and a second slurry such that said front end portions of said optical fibers protrude beyond said preferentially etched front surface of said main body by lengths with variations which are within a specified value about an average length.
2. The method of claim 1 wherein said average length is over 1 micron.
3. The method of claim 2 wherein said average length is over 3 microns.
4. The method of claim 2 wherein said specified value is 0.5 microns.
5. The method of claim 3 wherein said specified value is 0.5 microns.
6. The method of claim 4 wherein said optical fibers are arranged linearly through said main body and the maximum difference between the protruding lengths of a mutually adjacent pair of said optical fibers is less than 0.2 microns.
7. The method of claim 5 wherein said optical fibers are arranged linearly through said main body and the maximum difference between the protruding lengths of a mutually adjacent pair of said optical fibers is less than 0.2 microns.
8. The method of claim 1 wherein said textile pad comprises nylon and said first slurry includes abrading particles with average diameter in the range of 3-5 microns.
9. The method of claim 1 wherein said textile pad comprises nylon and said first slurry includes abrading particles with average diameter in the range of 3-5 microns.
10. The method of claim 1 wherein said sponge-like material is polyurethane with hardness between 20-80 duro, having pores with sizes between 20-100 microns.
11. The method of claim 8 wherein said sponge-like material is polyurethane with hardness between 20-80 duro, having pores with sizes between 20-100 microns.
12. The method of claim 10 wherein said second slurry includes abrading particles with average diameter in the range of 0.1-2.0 microns.
13. The method of claim 11 wherein said second slurry includes abrading particles with average diameter in the range of 0.1-2.0 microns.
14. The method of claim 12 wherein front surfaces of said optical fibers have surface roughness Ra of less than 2 nm after being polished by said sponge-like material.
15. The method of claim 13 wherein front surfaces of said optical fibers have surface roughness Ra of less than 2 nm after being polished by said sponge-like material.
16. A polishing pad comprising a layer of a porous and compressive sponge-like material and an adhesive tape on which said layer is attached, said sponge-like material having hardness in the range of 20-80 duro, having pores with sizes in the range of 20-100 microns.
17. The polishing pad of claim 16 wherein said layer has a thickness in the range of 300-1500 microns.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090298391A1 (en) * 2007-03-09 2009-12-03 Kunio Yamada Method of polishing end face of multi-fiber optical connector
US20100247868A1 (en) * 2009-03-24 2010-09-30 Yoon Jong CHA Polyurethane porous product and manufacturing method thereof and polishing pad having polyurethane porous product

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004145212A (en) * 2002-10-28 2004-05-20 Shinko Electric Ind Co Ltd Optical fiber ribbon and method for processing optical fiber
US7914543B2 (en) * 2003-10-14 2011-03-29 Satiety, Inc. Single fold device for tissue fixation
US20060072879A1 (en) * 2004-09-30 2006-04-06 Lizhang Yang Optical fiber polishing method
US7140950B1 (en) * 2005-12-27 2006-11-28 3M Innovative Properties Company Fiber polishing apparatus and method for field terminable optical connectors
US7566259B2 (en) * 2007-01-03 2009-07-28 Adc Telecommunications, Inc. Method of manufacturing ferrule assemblies

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6099954A (en) * 1995-04-24 2000-08-08 Rodel Holdings, Inc. Polishing material and method of polishing a surface
US6126532A (en) * 1997-04-18 2000-10-03 Cabot Corporation Polishing pads for a semiconductor substrate
US20020013124A1 (en) * 2000-06-30 2002-01-31 Manabu Tsujimura Polishing apparatus
US6641471B1 (en) * 2000-09-19 2003-11-04 Rodel Holdings, Inc Polishing pad having an advantageous micro-texture and methods relating thereto
US20040053499A1 (en) * 2001-03-14 2004-03-18 Applied Materials, Inc. Method and composition for polishing a substrate
US6712681B1 (en) * 2000-06-23 2004-03-30 International Business Machines Corporation Polishing pads with polymer filled fibrous web, and methods for fabricating and using same

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310974A (en) * 1976-03-11 1982-01-19 The Singer Company Simulated lights for an airfield model
JPS63207552A (en) * 1987-02-23 1988-08-26 Nippon Telegr & Teleph Corp <Ntt> Face polishing device for bar stock
JPH0381708A (en) * 1989-08-25 1991-04-08 Nippon Telegr & Teleph Corp <Ntt> Method for polishing ultra-low reflection optical connector ferrule
US5135590A (en) * 1991-05-24 1992-08-04 At&T Bell Laboratories Optical fiber alignment method
US5566262A (en) * 1993-05-14 1996-10-15 The Furukawa Electric Co., Ltd. Optical fiber array and a method of producing the same
US5345529A (en) * 1993-07-06 1994-09-06 At&T Bell Laboratories Method for assembly of an optical fiber connective device
US5337384A (en) * 1993-07-06 1994-08-09 At&T Bell Laboratories Optical fiber connector
JP3289751B2 (en) * 1994-04-06 2002-06-10 日本電信電話株式会社 Removal method of adhesive for optical connector
JPH0829639A (en) * 1994-07-13 1996-02-02 Seiko Giken:Kk Polishing base plate of spherical surface polishing deevice for end face of optica fiber and spherical surface polishing mthod of optical fiber
JP3084471B2 (en) * 1994-09-28 2000-09-04 セイコーインスツルメンツ株式会社 Polishing method of ferrule end face of optical connector
JP3279912B2 (en) * 1996-03-14 2002-04-30 大日本印刷株式会社 Polishing tape for optical connector ferrule end face, method for polishing optical connector ferrule end face, and polishing apparatus for optical connector ferrule end face
US5815621A (en) * 1996-05-23 1998-09-29 Sumitomo Electric Industries, Ltd. Optical fiber connector ferrule with die and method of manufacturing same
JP3978253B2 (en) * 1997-04-07 2007-09-19 株式会社きもと Polishing film for optical fiber connector and polishing method using the same
EP0967499A4 (en) * 1997-12-16 2005-01-05 Furukawa Electric Co Ltd Optical part and method and device for polishing end face of the same
US6236787B1 (en) * 1998-07-08 2001-05-22 Optical Switch Corporation Method and apparatus for aligning optical fibers using an alignment spacer
JP2000121889A (en) * 1998-10-21 2000-04-28 Nec Corp Optical module and manufacture of optical module
US6106368A (en) * 1998-11-18 2000-08-22 Siecor Operations, Llc Polishing method for preferentially etching a ferrule and ferrule assembly
US6416236B1 (en) * 1999-09-07 2002-07-09 Siecor Operations, Llc Ferrule for facilitating fiber-to-fiber contact and associated fabrication method
US6595698B2 (en) * 2000-06-13 2003-07-22 Siwave, Inc. High density fiber terminator/connector
US6470123B1 (en) * 2000-07-18 2002-10-22 Fiberguide Industries, Inc. Large optical fiber array assembly and method
US6393187B1 (en) * 2000-08-03 2002-05-21 Lucent Technologies Optical fiber arrays with reduced return loss and methods for making same
US20020159729A1 (en) * 2001-04-27 2002-10-31 Dimascio Philip A. Optical fiber array

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6099954A (en) * 1995-04-24 2000-08-08 Rodel Holdings, Inc. Polishing material and method of polishing a surface
US6126532A (en) * 1997-04-18 2000-10-03 Cabot Corporation Polishing pads for a semiconductor substrate
US6712681B1 (en) * 2000-06-23 2004-03-30 International Business Machines Corporation Polishing pads with polymer filled fibrous web, and methods for fabricating and using same
US20020013124A1 (en) * 2000-06-30 2002-01-31 Manabu Tsujimura Polishing apparatus
US6641471B1 (en) * 2000-09-19 2003-11-04 Rodel Holdings, Inc Polishing pad having an advantageous micro-texture and methods relating thereto
US20040053499A1 (en) * 2001-03-14 2004-03-18 Applied Materials, Inc. Method and composition for polishing a substrate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090298391A1 (en) * 2007-03-09 2009-12-03 Kunio Yamada Method of polishing end face of multi-fiber optical connector
US20100247868A1 (en) * 2009-03-24 2010-09-30 Yoon Jong CHA Polyurethane porous product and manufacturing method thereof and polishing pad having polyurethane porous product

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US20030039452A1 (en) 2003-02-27
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US6632026B2 (en) 2003-10-14
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JP3867704B2 (en) 2007-01-10

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