WO2003085431A1 - Substrat pour reseau de fibres optiques et son procede de production - Google Patents
Substrat pour reseau de fibres optiques et son procede de production Download PDFInfo
- Publication number
- WO2003085431A1 WO2003085431A1 PCT/JP2003/003053 JP0303053W WO03085431A1 WO 2003085431 A1 WO2003085431 A1 WO 2003085431A1 JP 0303053 W JP0303053 W JP 0303053W WO 03085431 A1 WO03085431 A1 WO 03085431A1
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- WO
- WIPO (PCT)
- Prior art keywords
- optical fiber
- base material
- substrate
- groove
- fiber array
- Prior art date
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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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/368—Mechanical coupling means for mounting fibres to supporting carriers with pitch conversion between input and output plane, e.g. for increasing packing density
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/037—Re-forming glass sheets by drawing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/047—Re-forming tubes or rods by drawing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/07—Re-forming tubes or rods by blowing, e.g. for making electric bulbs
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
- C03C10/0027—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O as main constituents
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
- G02B6/3636—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3684—Mechanical coupling means for mounting fibres to supporting carriers characterised by the manufacturing process of surface profiling of the supporting carrier
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3648—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures
- G02B6/3652—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3834—Means for centering or aligning the light guide within the ferrule
- G02B6/3838—Means for centering or aligning the light guide within the ferrule using grooves for light guides
- G02B6/3839—Means for centering or aligning the light guide within the ferrule using grooves for light guides for a plurality of light guides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Definitions
- the present invention relates to an optical fiber array substrate used in an optical device for connecting a plurality of optical fibers and having a fixing groove for accommodating and positioning the plurality of optical fibers, and a method of manufacturing the same.
- a substrate having a straight V-groove is used for the alignment of such a plurality of optical fibers, and the substrate is formed by press working, cutting a plate material, or forming a silicon single crystal plate.
- a manufacturing method using a directional etching calorie of a material is used.
- V-grooves with high angular accuracy are precisely ground one by one, and each V-groove is required. Since it is necessary to finish at intervals and heights, the number of processing steps is large and complicated, and there is a problem that the yield rate is not increased and the cost is increased.
- the optical fiber since the surface of the linear V-groove is rough and the shape between the V-grooves is too sharp, the optical fiber is When the fiber is attached, the fiber may be damaged, and the substrate for the optical fiber array itself may be easily damaged or chipped, so that the bending strength may be reduced and the fiber may be broken.
- the V-groove which has been worked out, may be damaged during machining or the subsequent cleaning process.Furthermore, cracks are formed in the bottom and top of the V-groove in the grinding process, etc. The strength is low, and when handling substrates for optical fiber arrays, there is also the problem that they are often damaged, the production efficiency is low due to the reduced yield, and they are unsuitable for mass production.
- Japanese Patent Application Laid-Open No. 2-139913 discloses a method for producing an optical fiber array substrate in which a glass base material is heated and softened and drawn to a 1/10 dimension (same meaning as stretch molding).
- the stated force actually softens and deforms the base material during stretch forming, It is difficult to maintain the shape and control the dimensional accuracy, and as a result, the shape of the V-groove is deformed, especially the shape of the outer V-groove is greatly deformed, and the height of each V-groove varies. It is not uniform and cannot be used as an optical fiber array substrate used in applications requiring high precision.
- the substrate formed by the conventional stretch forming method is slightly stretched when the surface of the base material on which the V-groove is formed is heated and softened, and the central portion thereof is concave by about several ⁇ . Deform. Due to this deformation, the height of the V-groove at the center becomes several ⁇ lower than that of the V-groove at the periphery. It is extremely difficult to fabricate a high-precision V-groove substrate because ⁇ ⁇ varies.
- the conventional optical fiber array substrate 1 has the outer peaks forming the outermost V-grooves 2a and 2b among the V-grooves 2 for fixing the optical fiber. Since the portions 2d and 2e are greatly different in shape from the inner crest 2c, when the optical fiber 4 is fixed to the optical fiber array substrate 1 using a thermosetting adhesive, or when the optical fiber array is formed.
- the present invention has been made in view of the above-described problems, has high precision that can be used for high-speed, large-capacity optical communication applications, and damages an optical fiber array substrate and an attached optical fiber.
- Optical fiber array substrate that does not give and production efficiency It is an object of the present invention to provide a method for manufacturing an optical fiber substrate which is high and suitable for mass production.
- An optical fiber array substrate is an optical fiber array substrate made of glass or crystallized glass obtained by depositing crystals in amorphous glass, and having a plurality of optical fiber fixing grooves formed therein.
- it is required that at least the tip of the outer ridge forming the outer groove for fixing the optical fiber with respect to the contact with the optical fiber has substantially the same shape as the tip of the inner ridge with the contact with the optical fiber.
- the outer crest that forms the outer groove for fixing the optical fiber is at a different height from the top of the inner crest, or when the outer crest that forms the outer groove for fixing the optical fiber is If the outer lower end is not at a position lower than the height of the contact point between the optical fiber and the ridge forming the groove, the outer crest at the tip (upper part) of the contact point between the optical fiber and the groove.
- the shape of the inner peak is different from the shape of the inner peak, when the optical fiber is fixed to the optical fiber array substrate using a thermosetting adhesive, or after the optical fiber array is formed, the outer peak and the inner Due to the difference in heat capacity between the ridge and the top, a difference occurs in the thermal history between the outer optical fiber and the inner optical fiber supported in the groove, which is a factor that degrades the reliability of the optical fiber array.
- the top of the outer ridge forming the outer groove for fixing the optical fiber is located at substantially the same height as the top of the inner ridge, and Since the outer lower end of the outer ridge forming the outer groove is at a position lower than the height of the contact point between the ridge forming the groove and the optical fiber, the fabricated optical fiber array is supported in the groove. There is no large difference in the heat history between the outer optical fiber and the inner optical fiber due to the difference in the heat capacity of the peak.
- the manufactured optical fiber array since the outer ridge forming the outer groove for fixing the optical fiber has substantially the same shape as the inner ridge, the manufactured optical fiber array has a groove. There is almost no difference in the heat history due to the difference in the heat capacity of the crest between the outer optical fiber frame supported inside and the inner optical fiber.
- the cross-sectional shape of the side surface parallel to the groove of the substrate may be a convex R shape.
- the convex R-shape that forms the cross-sectional shape of the side surface of the substrate may be any shape that is continuous, has no irregular dents, and has a curvature, and the specific shape is not particularly limited.
- a partial cylindrical surface is suitable for dimensional control.
- a hole substantially parallel to the groove may be provided inside the substrate.
- a guide bin is inserted into the hole inside the board, or an adhesive or solder is inserted into the hole to minimize the opposing optical fiber array board or waveguide. It can be easily and firmly assembled with a gripping amount.
- the optical fiber is bonded and cured with a thermosetting adhesive or the like, the temperature of the entire substrate for the optical fiber array is easily homogenized, and the stress at the time of curing the adhesive is concentrated on a part of the optical fiber. There is no deterioration of optical characteristics.
- a hole having a substantially elliptical cross section or a hole having a substantially circular cross section can be employed.
- a plurality of holes may be provided inside the substrate. The hole penetrates through the inside of the substrate, and one or both ends are opened to the end surface of the substrate. Also, ? It is preferable that the cross-section of the recess is substantially constant along a direction substantially parallel to the groove of the substrate.
- the cross-sectional shape of the hole is substantially elliptical, when the optical fiber is bonded and cured with a thermosetting adhesive, the temperature uniformity of the entire substrate is further measured, and a part of the optical fiber is hardened with adhesive. There is no stress concentration during dagger, and there is no deterioration in optical characteristics.
- a guide bin having a circular cross section and a predetermined diameter is inserted into each of the holes, so that the optical fiber array on the other side is inserted. It can be easily, stably and accurately assembled to a substrate or a waveguide.
- the side groove serves as a pool for the adhesive used to fix the optical fiber in the groove for fixing the optical fiber, and when the optical fiber is fixed with the adhesive, even if the amount of the adhesive is slightly increased, the light is not removed.
- the top of the crest forming the groove for fixing the optical fiber be a flat surface.
- the top of the peak be a flat surface.
- the distance between the top of the mountain and the line connecting the center of the optical fiber installed in the groove may be within 52.5 Aim. preferable. If the top of the peak is separated from the line connecting the centers of the optical fibers mounted in the grooves upward by a distance exceeding 52.5 ⁇ , the height of the optical fiber mounted and fixed in the grooves is increased.
- the material of the optical fiber array substrate of the present invention is glass or crystallized glass in which crystals are precipitated in amorphous glass.
- Substrates for optical fiber arrays made of glass or crystallized glass with crystals precipitated in amorphous glass have similar polishing characteristics to optical fibers. It can be polished with high precision.
- a photocurable resin is applied to the groove, an optical fiber is arranged, and ultraviolet light is irradiated through the optical fiber array substrate. This makes it possible to fix the optical fiber.
- the substrate for an optical fiber array of the present invention is preferably manufactured by stretching a base material.
- the base material with the straight grooves processed by cutting is heat-softened and stretch-formed, so that the straight grooves are heat-softened, and the optical fiber array substrate is less likely to be scratched or chipped and is less likely to break. Become. Also, when the optical fiber is mounted on the optical: ray substrate, the optical fiber is not easily damaged.
- the dimensional accuracy required for the linear groove to be applied to the base material in advance is smaller than that of the optical fiber array substrate Therefore, the base material can be easily processed without using special processing equipment. Therefore, the labor and cost for processing can be significantly reduced. Further, by changing the reduction ratio at the time of stretch molding, the interval between the linear grooves can be freely changed.
- the surface of the optical fiber array substrate manufactured by stretch molding is a fire-polished and smooth surface, which makes it difficult for the optical fiber surface to be damaged when the optical fiber is mounted later, and that the substrate surface is cut. Also, there is almost no trouble such as breakage of the optical fiber substrate itself.
- the base material is thermally softened and stretched in an electric furnace and then rapidly cooled, so that the surface of the optical fiber array substrate after forming has a stress value of about 1 OMPa.
- a compressive stress layer is formed. Therefore, the strength of the optical fiber array substrate is increased, and sufficient strength can be maintained even when the optical fiber repeatedly moves along the groove.
- the optical fiber array substrate according to the present invention is made of glass or crystallized glass in which crystals are precipitated in amorphous glass, and has an optical fiber array in which a plurality of optical fiber fixing grooves are formed.
- a cross-sectional shape of a side surface in a direction parallel to a groove of the substrate is a convex R-shape.
- optical fiber array substrate The following configuration may also be employed in the optical fiber array substrate according to the present invention for the reasons described above.
- the optical fiber array substrate according to the present invention is made of glass or crystallized glass in which crystals are precipitated in amorphous glass, and has an optical fiber array in which a plurality of optical fiber fixing grooves are formed. And a hole substantially parallel to the groove inside the substrate.
- optical fiber array substrate The following configuration may also be employed in the optical fiber array substrate according to the present invention for the reasons described above.
- the cross-sectional shape of the hole is substantially elliptical.
- the distance between the top of the mountain and the line connecting the center of the optical fiber installed in the groove is within 52.5 ⁇ .
- the optical fiber substrate manufactured by stretching from the base material is formed in the above-mentioned hole inside the substrate in a direction (height direction) perpendicular to one surface of the substrate in which the groove is formed.
- the ratio of the dimension in the height direction to the dimension in the height direction of the substrate is 10 % Or more.
- the concave deformation of one surface of the raw substrate during the stretch molding by appropriately controlling the pressure in the hole during the stretch molding. If the above ratio is less than 10%, the concave deformation of one surface of the substrate during the stretch molding may not be sufficiently eliminated even when the pressure in the hole is high.
- the ratio to the widthwise dimension of the groove formation region is 20% or more. It is a form.
- the width dimension of each hole is the sum of the width dimensions of each hole.
- the substrate for an optical fiber array according to the present invention can be manufactured by the following manufacturing method.
- a base material made of glass provided with a plurality of linear grooves on one surface or crystallized glass is prepared.
- at least the tip side of the outer crest which is provided on one surface of the base material and forms the outer groove for fixing the optical fiber after molding, with respect to the contact point with the optical fiber, is in contact with the optical fiber of the inner crest. It is formed almost the same shape as the tip side from the contact.
- the base material is gripped by the holding portion of the feeding means and fed into the heating furnace, whereby the base material is heated to a predetermined temperature, and the lower part of the base material is stretched by being pulled by the pulling means.
- the formed body stretch-formed in this manner is cut into a predetermined length to obtain a long body having a shape similar to the base material and having a desired range H. Thereafter, the long body is cut into a desired length.
- the tip of the outer peak that forms the outer groove for fixing the optical fiber after molding is in contact with the optical fiber, and the inner peak is the contact with the optical fiber. Since it is formed to have substantially the same shape as the distal end side, the outer groove portion for fixing the optical fiber is not deformed, and can be formed with high precision and accuracy similarly to the inner groove portion.
- the outer ridge forming the outer groove for fixing the optical fiber after molding is formed in substantially the same shape as the inner ridge! / ,.
- the cross-sectional shape of the side surface parallel to the groove of the base material is formed in a convex R shape. If the side surface of the base material is flat, the side surface of the base material is unevenly heated during stretch forming, and a large temperature distribution is generated in the side surface, so that the cross-sectional shape of the formed body is easily deformed. On the other hand, by forming the cross-sectional shape of the side surface of the base material into a convex R shape, the side surface of the base material is easily heated uniformly during stretch forming, and the surface tension acts on the side surface of the base material when softened. In this case, precise dimensional stabilization of the molded body is possible, and a highly accurate substrate can be manufactured with high efficiency.
- the bending strength of the base material can be increased, chipping cracks can be prevented, and the yield of the substrate can be improved.
- An optical fiber array substrate can be efficiently manufactured by forming a hole along the longitudinal direction of the groove in advance in the base material to be stretch-formed.
- a groove having a substantially constant cross-sectional area is formed by penetrating the inside of the base material along the longitudinal direction of the groove, and the hole is changed to an arbitrary size during stretch forming, whereby the groove is formed.
- the dent on one side of the substrate can be corrected.
- the diameter of the hole becomes large, and the center of the area on one side of the substrate, which is closest to the hole by a straight line distance, The dent can be corrected.
- the diameter of the recess can also be reduced. For this reason, the height of the optical fiber array substrate can be freely changed, the variation in the height of the groove can be reduced, and an optical fiber array substrate with good dimensional accuracy can be manufactured.
- the width of the groove for fixing the optical fiber can be arbitrarily changed by changing the reduction ratio of the cross section of the elongate body to the cross section of the base material at the time of stretching. Therefore, it is possible to change the distance between the grooves of the optical fiber array substrate, and the grooves at various intervals required for the optical fiber to be mounted can be manufactured simply and quickly at a low cost without the need for new equipment such as dies. be able to. Also, adjust the temperature of the base material during stretch molding. By controlling the viscosity by the above method, the shape and interval of the groove can be minutely changed.
- the substrate for an optical fiber array according to the present invention can also be manufactured by the following manufacturing method. That is, a base material made of glass or crystallized glass provided with a plurality of linear grooves on one surface is prepared, the base material is held by the holding portion of the feeding means, and the base material is sent to the heating furnace. As a result, the base material is heated to a predetermined temperature, stretch-formed while pulling the lower part of the base material by a tension means to obtain a formed body, and the formed body is cut into a predetermined length to obtain a substantially similar shape to the base material.
- a step of preparing a base material includes: A method for manufacturing an optical fiber substrate that has a convex R-shaped cross section.
- the width of the groove for fixing the optical fiber can be changed arbitrarily by changing the reduction ratio of the cross section of the long body to the cross section of the base material during stretch molding.
- the substrate for an optical fiber array according to the present invention can also be manufactured by the following manufacturing method. That is, a base material made of glass or crystallized glass provided with a plurality of linear grooves on one surface is prepared, the base material is held by the holding portion of the feeding means, and the base material is sent to the heating furnace. As a result, the base material is heated to a predetermined temperature, stretch-formed while pulling the lower part of the base material by a tension means to obtain a formed body, and the formed body is cut into a predetermined length to obtain a substantially similar shape to the base material.
- the groove is substantially parallel to the groove inside the base material.
- the inner diameter of the hole of the base material is changed at the time of stretch forming, and the air pressure in the hole of the base material is controlled at the time of stretch forming.
- the width of the groove for fixing the optical fiber is arbitrarily changed by changing the reduction ratio of the cross section of the long body to the cross section of the base material during stretch molding.
- the manufacturing method of the present invention since a base material having a cross-sectional area larger than that of an optical fiber array substrate by several tens of times or more is stretch-formed, the dimensional accuracy required for a linear groove portion to be applied to the base material in advance has an Relaxed by several tens of times compared to the fiber array substrate. Therefore, processing can be easily performed without using a special processing device or the like, and labor and cost for processing can be reduced.
- FIG. 1 shows an optical fiber array substrate according to a first embodiment, where FIG. 1 (A) is a perspective view, FIG. 1 (B) is a side view, and FIG. 1 (C) is an enlarged photograph of a V-groove portion. It is.
- FIG. 2A and 2B show an optical fiber array substrate according to a second embodiment.
- FIG. 2A is a perspective view
- FIG. 2B is a side view
- FIG. 2C is an enlarged photograph of a V-groove. It is.
- FIG. 3 shows an optical fiber array substrate according to a third embodiment, where FIG. 3 (A) is a view from ⁇ f, FIG. 3 (B) is a side view, and FIG. 3 (C) shows an optical fiber.
- FIG. 4 is a side view showing a state where the liquid crystal display is fixed with an adhesive.
- FIG. 4 shows an enlarged side view of the V-groove portion.
- FIG. 4 (A) shows an optical fiber array substrate having a V-groove interval P of 127 ⁇
- FIG. 4 ( ⁇ ) shows an interval between the V-groove portions. Indicates an optical fiber array substrate of 250 ⁇ .
- FIG. 5 shows an optical fiber array substrate according to the fourth embodiment
- FIGS. 5 ( ⁇ ) to (D) show different partial centers of curvature of the side surfaces of the partial cylindrical shape, and different cross-sectional shapes and numbers of holes. Examples are given respectively.
- Figure 6 shows the base material used in stretch forming and the glass plate that is the base material.
- Figure 6 ( ⁇ ) shows the glass plate
- Figure 6 ( ⁇ ) shows the glass plate of Figure 6 (6)
- Fig. 6 (C) shows the glass plate
- Fig. 6 (D) shows the base material prepared by processing the 6 (C) glass plate.
- Fig. 7 conceptually shows the process of stretching and forming the base material.
- Fig. 7 (A) shows the process of stretching and forming the base material without holes
- Fig. 7 (B) shows the process of forming the base material with holes.
- the drawing shows the process of stretch forming.
- FIG. 8 conceptually shows a mode of dimension measurement of a stretched molded product molded from a base material.
- FIG. 9 shows a conventional optical fiber array substrate. Detailed description of the invention
- FIG. 1 shows an optical fiber array substrate 11 according to the first embodiment.
- the optical fiber array substrate 11 is made of, for example, transparent borosilicate glass, and has eight grooves (for example, V-grooves) on one surface of which eight-core optical fibers 14 are aligned and fixed in parallel with each other.
- V-grooves for example, V-grooves
- 1 and V-shaped groove portions 13 formed outside the outermost V-grooves 12 located on both side surfaces of the substrate 11.
- the side surfaces 11a and 11b of the substrate 11 parallel to the groove 12 are each a convex partial cylindrical surface having a center of curvature at the center of the substrate 11.
- the top of the outer peaks 1 2c and 1 2d forming the outermost V-groove 12 are at the same height as the top of the inner peak 12a, as shown in the enlarged view of Fig. 1 (B).
- the height of the bottom part 13 a of the side groove part 13 is lower than the contact point 12 e between the ridge line of the V groove 12 and the optical fiber 14.
- the height of the bottom 13 a of the side groove 13 is V, which is higher than the bottom of the groove 12.
- FIG. 2 shows an optical fiber array substrate 11 according to a second embodiment.
- the side surfaces 11a and 11b of the substrate 11 'parallel to the groove 12 are flat planes, respectively.
- Other configurations are the same as those of the embodiment shown in FIG. The dimensions of the optical fiber array substrate 11 shown in FIG. 1 were measured.
- the optical fiber array substrate 11 is fixed so that the end face can be observed from directly in front of the measuring microscope, and the optical fiber 14 is viewed on a screen viewed through a measuring microscope equipped with a CCD camera.
- the shape of the fixed linear V-grooves 12 was image-recognized, and the valley angle of each linear V-groove 12 and the distance between the V-grooves 12 were measured.
- the angle of the valley of the V groove 12 is 96 °
- the interval between the V grooves 12 is 127 ⁇ ⁇ 0.5 / im
- the variation of the height of the V groove 12 is within 0.5 ⁇ of soil. there were.
- the angle of the valley was 98 °.
- the flat surface 1 formed on the top of the crest 12a of the V-groove 12 was formed.
- the length of 2b was about 10 / zm.
- the optical fiber array substrate 11 has an optical fiber fixed to the V-groove 12 with an interval 127 of 127 ⁇ ⁇ ⁇ 0.
- the distance L between the line connecting the center 14a of 14 and the plane 12b of the peak 12a was 20 ⁇ within 52.5 m.
- FIG. 3 shows an optical fiber array substrate 15 according to the third embodiment.
- V-groove-shaped side grooves 17 are respectively formed outside the outermost V-grooves 12 located on both side surfaces of the substrate 15, and the height of the bottom of the side groove 17 is equal to that of the V-groove 12. It is almost the same height as the bottom.
- the outer ridges 12c and 12d are formed to have substantially the same size and shape as the inner ridge 12a by the side groove portion 17. Other configurations are the same as those of the embodiment shown in FIG.
- the dimensions of the optical fiber array substrate 15 shown in FIG. 3 were measured by the same measurement method as described above.
- the angle of the valley of the V groove 12 was 96 °
- the interval between the V grooves 12 was 250 / ⁇ ⁇ 0.5 ⁇
- the variation in the height of the V groove 12 was within ⁇ 0.5 ⁇ .
- the interval ⁇ between the V-grooves 12 is 250 ⁇ ⁇ ⁇ ⁇ 0.5 m
- the distance L from the plane 12b was 30 ⁇ within 52.5 ⁇ .
- an eight-core optical fiber 14 was fixed to an optical fiber array substrate 15 via an adhesive 16, and was fixed by holding it with a sheet glass 18.
- the width of the optical fiber array substrate 15 and the plate glass 18 is 2.8 mm, and the depth is 10 mm.
- 8 although the adhesive amount necessary for bonding the optical fiber 14 all of the core is about 1.
- the adhesive performed using the amount of the adhesive 16 slightly larger than this
- the adhesive 16 did not protrude from the side surface of the optical fiber array substrate 15, and the bonding could be performed neatly. If there is no reservoir allowance become side grooves 17 of the adhesive 16, to manage the amount of adhesive so that the adhesive 16 does not protrude, the adhesive amount of about 1.
- 0X 10- 3 ml or more 1. 4X needed to below 10- 3 ml there Ru. If the amount of the adhesive is less than 1. OX 10- 3 ml is 8 all core optical fiber the adhesive 16 not spread, when exceeds 1. 4X 10- 3 ml, the adhesive 16 substrate 15 side It will protrude. That is, whereas if there is no side groove portion 17 which is a reservoir margin of adhesive 16, shall manage amount of adhesive in the range of about 0. 4 X 10- 3 m 1, adhesive 16 in providing the groove portion 17 serving as a reservoir allowance case, the adhesive weight of about 1. 0X 10 one 3 ml or more, can be less than 1. 7X 10- 3 ml. That is, the control range of the adhesive of about 0. 7X 10 one 3: can be expanded up to ml.
- FIG. 5 shows an optical fiber array substrate 20 according to a fourth embodiment.
- the optical fiber array substrate 20 is made of, for example, transparent borosilicate glass.
- eight grooves (for example, V grooves) 22 for aligning and fixing eight-core optical fibers in parallel with each other, V-groove-shaped side groove portions 23 are respectively formed outside the outermost V-grooves 22 located on both side surfaces of 20.
- the interval between the V-grooves 22 and the interval between the V-groove 22 and the side groove portion 23 are each 250 m.
- the side surfaces 20a and 20b of the substrate 20 parallel to the V-groove 22 are each a convex partial cylindrical surface.
- a hole 21 substantially parallel to the groove 22 is provided inside the substrate 20.
- the centers of curvature M of the side surfaces 20 a and 20 b are respectively located at the center of the substrate 20.
- the centers of curvature M of the side surfaces 20 a and 20 b are offset from the center of the substrate 20 and are located inside the substrate 20.
- the centers of curvature M of the side surfaces 20a and 20b are respectively offset from the center of the substrate 20. And is located outside the substrate 20.
- the side surfaces 20a and 20b are not limited to the convex R surfaces having a single curvature, and may be a composite of convex R surfaces having different curvatures.
- the cross-sectional shape as shown in FIG. 5A is substantially circular
- the cross-sectional shape as shown in FIG. Fig. 5 (D) shows three holes with a substantially circular cross section as shown in Fig. 5 (C), which are concentrated in the lower central part of the area where the V-groove 22 is formed. It is possible to employ three holes each having a substantially circular cross section as shown in the figure, one in the lower central part of the V-groove 22 forming area, and one in each of the lower end parts.
- the hole 21 penetrates through the inside of the substrate 20 and opens at both end surfaces of the substrate 20.
- the substrate having the V-shaped groove 22 is formed by increasing (pressurizing) the internal pressure of the hole 21 during the stretch molding.
- One side of 20 has been modified to substantially eliminate the dent on one side.
- the air pressure in the central hole 21 is increased (pressurized) during the stretch forming, and the air pressure in the two holes 21 at both ends is increased.
- V groove by reducing (decompressing)
- the surface of the substrate 20 having 22 is modified to substantially eliminate the depression on one surface.
- the dimensions of the optical fiber substrate 20 shown in FIG. 5 were measured by the same measurement method as described above.
- the interval between the V-shaped grooves 22 was 250 ⁇ ⁇ 0. 0 in any of the embodiments shown in FIGS. 5 (A;) to (D).
- the variation in the height of the V-groove 22 is within 0.5 / zm of soil for each of the configurations shown in FIGS. 5A and 5B, and the variation shown in FIGS. 5C and 5D for each of the configurations shown in FIGS. Each was within ⁇ 0.4 / zm.
- a cylindrical material made of borosilicate glass is processed and, as shown in Fig. 6 (A), two planes 3 1 parallel to each other, leaving the side surfaces 31a and 31b, which are partially cylindrical surfaces.
- a glass plate 31 on which c and 31 d were formed was produced. Thereafter, one surface 31c of the glass plate 31 was processed to produce a base material 32 as shown in FIG. 6 (B).
- the side surfaces 32a and 32b of the base material 32 are convex R-shaped partial cylindrical surfaces.
- the base material 32 is attached to a stretch forming apparatus 40, heated by an electric furnace 42, and stretch-formed from the electric furnace 42. g is pulled by a drive roller (not shown), and the diameter of the side of the stretch-formed portion 32 g is measured with a laser beam (not shown) and controlled to a constant outer diameter while measuring the same diameter as the optical fiber substrate to be formed. A molded body having a cross-sectional shape and a cross-sectional dimension was formed.
- the side width (diameter of the partial cylindrical surface) W of the stretch molded portion 32 g is received by one laser beam L of the measuring device 50.
- the stretch-formed part 32g is slightly inclined during the stretch-forming. Even in the case that the width (diameter of the partial cylindrical surface) W is measured accurately, the width (diameter of the partial cylindrical surface) W is precisely controlled, so that the stretch-formed part 32 g, and consequently the light The dimensions of the fiber array substrate can be accurately controlled.
- the formed body formed by the stretch forming was cut into a length of 250 mm by a force cutter 43 to obtain a long material 34.
- the long member 34 obtained in this manner was precisely cut into a predetermined length to obtain an optical fiber lay substrate 11 as shown in FIG.
- an optical fiber array substrate having a V-groove interval of 250 ⁇ from the same base material 32 was produced.
- the angle of the valley of the V-groove in the optical fiber array substrate thus fabricated was 96 °
- the interval between the V-grooves was 250 ⁇ ⁇ 0.5 / xm
- the height of the optical fiber 14 fixed to the V-groove was 14 The variability was within ⁇ 0.5 ⁇ .
- the Ra value of the surface roughness was 0.04 / m. This is because the surface of the optical fiber array substrate was fire-polished due to thermal softening and the surface became smooth. Is shown.
- a compressive stress layer is formed on the surface of an optical fiber array substrate by a quenching method (taching) to reinforce the optical fiber array substrate
- the molded body for the optical fiber array substrate having a predetermined cross-sectional dimension and shape coming out of the furnace is cooled by cold air.
- Compressed layer is generated on the surface of glass by quenching by cooling or cooling.
- a long material for the substrate for the optical fiber array of about 25 O mm is placed in the ion exchange tank at about 400 ° C. about 1 immersed 0 hours in 0 3 molten salt. Then, removal of KN_ ⁇ 3 by washing, can flexural strength by three-point bending as mechanical strength to obtain a long material of a substrate for an optical Faibaarei that more than doubled Te ratio base to those of the untreated You.
- the alkali ion (K +) having a larger ionic radius replaces the alkali ion (N a +) in the glass at a temperature lower than the cooling temperature, so that the surface of the glass becomes 1%.
- Practical strength can be increased by generating a compressive stress layer of about 0 OMPa.
- a cylindrical material made of borosilicate glass was processed and, as shown in FIG. 6 (C), leaving side surfaces 31a and 31b which are partial cylindrical surfaces, A glass plate 31 was formed in which two planes 31c and 3Id parallel to each other were formed, and a hole 33d having a substantially circular cross-section was formed therein. Then, the surface 31 c of the glass plate 31 was processed to prepare a base material 33 as shown in FIG. 6D. On one surface 33 c of the base material 33, there are eight grooves 33 e having a straight valley angular force S 90 ° which become V grooves for fixing the optical fiber after molding, and a side groove outside the groove. 33 f processing is applied.
- the side surfaces 33a and 33b of the base material 33 are convex R-shaped partial cylindrical surfaces.
- a hole 33d is located at a central portion below one surface 33c of the base material 33.
- the same cross-sectional shape and shape as the optical fiber substrate to be formed can be obtained.
- a molded body having a cross-sectional dimension was formed. Thereafter, the molded body was cut into a length of 25 Omm by a cutter 43 to obtain a long material 35. Then, the long member 35 thus obtained was precisely cut into a predetermined length to produce an optical fiber array substrate 20 as shown in FIG. 5 (A).
- the crystallized glass shown in Table 1 was used as the material of the sheet glass 31 (base material 33), and two types of crystallized glass with a V groove interval of 127 zm and 250 / zm were used.
- An optical fiber array substrate was manufactured.
- the spacing P between the V grooves was 127 ⁇ ⁇ 0.5 ⁇ for the former, and 250 / im ⁇ 0.5 ⁇ , variation in height of optical fiber fixed in V-groove is within ⁇ 0.5 ⁇ in both cases, and all optical fiber array substrates have high dimensional accuracy.
- the glass fiber optics substrate for optical fiber arrays had improved transverse rupture strength compared to glass substrates, but its polishing properties were close to those of quartz-based optical fibers and were excellent. .
- the side groove outside the groove for fixing the optical fiber by forming the side groove outside the groove for fixing the optical fiber, at least the front end side of the peak outside the groove with respect to the contact with the optical fiber and the inside peak are formed.
- the force that makes the shape almost the same as the tip side from the point of contact with the optical fiber of the above, or the whole part of the crest outside the groove is almost the same shape as the whole part of the inside crest This is not limited to this. Maintains the height level of the outer lower end of the crest outside the groove to the side of the board, and the area from the outer crest to the side of the board is generally flat and down to the top of the crest May be used.
- the angle of the valley of the V-groove is 98 ° or 96 from the base material having the V-groove whose valley angle is S90 °.
- the optical fiber array substrate is manufactured as above, the angle of the V-groove of the optical fiber array substrate may be 90 ° or 100 °, and the cross-sectional shape of the groove for fixing the optical fiber is not limited to the V-groove, but is rectangular. Other shapes may be used. Xie No.
- Crystal growth boat 1000 1000 980 1050 1000 Main crystal English solid solution -Spoju / 3-Spoju -Spoju] 3-Spoju Men solid solution Men solid solution Men solid solution Men solid solution Men solid solution
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/507,955 US7406243B2 (en) | 2002-03-15 | 2003-03-14 | Optical fiber array substrate and method for producing the same |
CA002479319A CA2479319A1 (en) | 2002-03-15 | 2003-03-14 | Optical fiber array substrate and method for producing the same |
EP03708599A EP1486806A4 (en) | 2002-03-15 | 2003-03-14 | SUBSTRATE FOR OPTICAL FIBER NETWORK AND METHOD FOR PRODUCING THE SAME |
US12/036,108 US7616857B2 (en) | 2002-03-15 | 2008-02-22 | Optical fiber array substrate |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002072098 | 2002-03-15 | ||
JP2002-72098 | 2002-03-15 | ||
JP2002171141 | 2002-06-12 | ||
JP2002-171141 | 2002-06-12 | ||
JP2002-189090 | 2002-06-28 | ||
JP2002189090 | 2002-06-28 |
Related Child Applications (2)
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---|---|---|---|
US10507955 A-371-Of-International | 2003-03-14 | ||
US12/036,108 Continuation US7616857B2 (en) | 2002-03-15 | 2008-02-22 | Optical fiber array substrate |
Publications (1)
Publication Number | Publication Date |
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WO2003085431A1 true WO2003085431A1 (fr) | 2003-10-16 |
Family
ID=28794767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/003053 WO2003085431A1 (fr) | 2002-03-15 | 2003-03-14 | Substrat pour reseau de fibres optiques et son procede de production |
Country Status (5)
Country | Link |
---|---|
US (2) | US7406243B2 (ja) |
EP (2) | EP2402803A3 (ja) |
CN (1) | CN1310049C (ja) |
CA (1) | CA2479319A1 (ja) |
WO (1) | WO2003085431A1 (ja) |
Cited By (1)
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US7625132B2 (en) * | 2004-06-30 | 2009-12-01 | Hoya Corporation Usa | Packaging for a fiber-coupled optical device |
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US9139469B2 (en) | 2012-07-17 | 2015-09-22 | Corning Incorporated | Ion exchangeable Li-containing glass compositions for 3-D forming |
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US9810850B1 (en) * | 2016-08-15 | 2017-11-07 | Te Connectivity Corporation | Fiber gripper assembly for optical connectors |
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WO2021106163A1 (ja) * | 2019-11-28 | 2021-06-03 | 日本電信電話株式会社 | 光ファイバアレイ |
US11650381B1 (en) * | 2022-02-12 | 2023-05-16 | Globalfoundries U.S. Inc. | PIC die and package with cover for multiple level and multiple depth connections of fibers to on-chip optical components |
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- 2003-03-14 US US10/507,955 patent/US7406243B2/en not_active Expired - Fee Related
- 2003-03-14 CA CA002479319A patent/CA2479319A1/en not_active Abandoned
- 2003-03-14 EP EP11180969A patent/EP2402803A3/en not_active Withdrawn
- 2003-03-14 EP EP03708599A patent/EP1486806A4/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
US7406243B2 (en) | 2008-07-29 |
US20080159705A1 (en) | 2008-07-03 |
EP1486806A4 (en) | 2008-12-17 |
CN1310049C (zh) | 2007-04-11 |
CA2479319A1 (en) | 2003-10-16 |
US7616857B2 (en) | 2009-11-10 |
EP2402803A3 (en) | 2013-02-06 |
US20050129380A1 (en) | 2005-06-16 |
EP1486806A1 (en) | 2004-12-15 |
CN1643419A (zh) | 2005-07-20 |
EP2402803A2 (en) | 2012-01-04 |
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