WO2006008965A1 - 光レセプタクル用フェルール保持部材及びその製造方法並びにそれを用いた光レセプタクル - Google Patents
光レセプタクル用フェルール保持部材及びその製造方法並びにそれを用いた光レセプタクル Download PDFInfo
- Publication number
- WO2006008965A1 WO2006008965A1 PCT/JP2005/012468 JP2005012468W WO2006008965A1 WO 2006008965 A1 WO2006008965 A1 WO 2006008965A1 JP 2005012468 W JP2005012468 W JP 2005012468W WO 2006008965 A1 WO2006008965 A1 WO 2006008965A1
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- WIPO (PCT)
- Prior art keywords
- sleeve
- holding member
- transparent body
- ferrule
- optical receptacle
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
- G02B6/327—Optical coupling means having lens focusing means positioned between opposed fibre ends with angled interfaces to reduce reflections
-
- 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
-
- 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
- G02B6/3845—Details of mounting fibres in ferrules; Assembly methods; Manufacture ferrules comprising functional elements, e.g. filters
-
- 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
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
Definitions
- the present invention relates to a ferrule holding member for an optical receptacle used for optically connecting an optical fiber connector to a light receiving / emitting element, and a manufacturing method thereof, and an optical receptacle using the same.
- the present invention relates to a ferrule holding member for an optical stubless optical receptacle and related technology.
- a conventional optical receptacle has a cylindrical built-in ferrule inserted into the proximal end portion of the inner hole of the sleeve by press-fitting or bonding, as disclosed in Patent Document 1 below as an example. It is constructed by inserting and attaching a sleeve holder to the outer periphery of the base end of the sleeve. Then, a ferrule (plug ferrule) is inserted into the distal end side of the inner hole of the sleeve, and the optical fiber on the plug ferrule side and the optical fiber on the built-in ferrule side come into contact with each other at the respective end faces. It is optically connected.
- Patent Document 1 Japanese Patent Laid-Open No. 10-332988 (FIG. 4)
- Patent Document 2 Japanese Patent Laid-Open No. 4-223412
- the optical receptacle disclosed in Patent Document 1 uses a built-in ferrule, the connection with the plug ferrule is PC-connected, and the connection loss is minimized.
- the outer diameter, inner diameter and concentricity of the built-in ferrule must be finished with high accuracy.
- the accuracy is that the outer diameter is 1.249mm ⁇ 0.5 ⁇ m, the inner diameter is 126.5 ⁇ ⁇ ⁇ 0.5 m (when using an optical fiber with a diameter of 125 m), The concentricity is 1. or less, and submicron accuracy is required. This is the reason why the manufacturing costs are soaring.
- PC connection Physical Contact Connection
- PC connection is an optical fiber connector in which the ferrule end face is polished to form a convex spherical surface, and the optical fiber core is in close contact with the ferrule end face. A connection method that reduces reflection.
- the optical fiber inserted in the inner hole of the built-in ferrule needs to be fixed with an adhesive, but this operation must be relied on manually and requires a lot of labor and cost.
- the difference between the outer diameter of the optical fiber and the inner diameter of the built-in ferrule, that is, the clearance is 1 to 2 111 (maximum eccentricity is 1. O ⁇ m)
- the optical fiber is inserted into the inner hole of the built-in ferrule.
- Eccentricity and maximum concentricity between the outer diameter and inner diameter are 1.4 m (maximum eccentricity is 0.7 ⁇ m), so there are few things that exceed the allowable connection loss of 0.5 dB.
- L is the distance between the center of the core of the optical fiber attached to the plug ferrule and the center of the core of the optical fiber attached to the built-in ferrule (distance between the cores), and D is the mode fiber. Inenoled, diameter.
- the eccentric amount of the optical fiber in the inner hole is 1 ⁇ m at the maximum, and the maximum eccentric amount due to the concentricity of the outer diameter and the inner diameter is Therefore, the maximum eccentricity is 1. Therefore, theoretically, the maximum distance between the cores is 3.
- the mode field diameter is 10 / zm
- a connection loss as large as 2. OdB can occur.
- the allowable value of the connection loss in the optical communication receptacle is 0.5 dB, and inevitably the dimensional accuracy of the built-in ferrule must be higher than the allowable value, which increases the cost. It is inevitable.
- due to environmental fluctuations there is a risk that the optical fiber may protrude or retract from the end face of the built-in ferrule. In some cases, the connection loss tends to increase, and PC connection may not be possible.
- the end face of the built-in ferrule on the side in contact with the plug ferrule must be polished to a convex spherical surface with high precision so that it can be connected to a PC.
- This operation is also performed one or several built-in ferrules at a time. Since it can only be polished, it is inferior in mass productivity, which also causes an increase in manufacturing costs.
- polishing flaws easily enter the end face of the built-in ferrule and the return loss becomes small.
- the first technical problem of the present invention is that it can be manufactured at a low cost, has a small connection loss, and forms a convex curved surface connected to the end face of the ferrule on the tip side so as to have an appropriate shape and characteristics.
- An object of the present invention is to provide a ferrule holding member for an optical receptacle, a method for manufacturing the same, and an optical receptacle using the same.
- the second technical problem of the present invention is that a ferrule holding member for an optical receptacle that can be manufactured at low cost, has a low connection loss, and does not cause a decrease in coupling efficiency, a manufacturing method thereof, and a method for using the same. It is to provide an optical receptacle.
- a ferrule holding member for an optical receptacle according to the present invention which has been made to solve the first technical problem, includes a sleeve having an inner hole for inserting a ferrule, and an inner hole of the sleeve. And a transparent body having a first end face for contacting the end face of the ferrule at an intermediate position in the axial direction of the sleeve, and the first end face of the transparent body was obtained by thermal treatment. It is characterized by a convex curved surface force.
- the transparent body has a first end face at an intermediate position in the axial direction of the sleeve, preferably at a central position in the axial direction, between the ferrule (plug ferrule) and the optical element (light emitting element or light receiving element). It delivers light.
- the transparent body is preferably a columnar body that is also a solid single member.
- the ferrule holding member for an optical receptacle is composed of a sleeve and a transparent body, and the first end surface of the transparent body that contacts the end surface of the ferrule (plug ferrule) is thermally treated. Therefore, it can be manufactured at low cost and the connection loss is small.
- the transparent body plays the role of delivering light between the plug ferrule and the light receiving element or light emitting element, as well as the built-in ferrule, and does not require an optical fiber. There is no need for labor, labor and cost for inserting and bonding.
- this transparent body does not have a waveguide structure such as an optical fiber unlike the built-in ferrule, so that it can be decentered as long as it is PC-connected so that there is no axial deviation from the core of the optical fiber of the opposing plug ferrule.
- connection loss can only exceed 0.5 dB if the problem is only the surface quality of the PC connection surface and the light transmittance of the transparent body at the communication wavelength.
- the first end surface of the transparent body is solidified after being softened and deformed by heat treatment, so that the first end surface becomes a convex curved surface having an appropriate shape due to surface tension or the like, and its characteristics or properties are mirror surface or mirror surface. It can be a close surface.
- the transparent body precursor can be softened and deformed by thermal treatment, and the first end face can be formed into an appropriately shaped convex curved surface. For this reason, the tolerance of the dimensional accuracy of the transparent body precursor is increased, the yield is improved, and the transparent body precursor can be produced at low cost.
- the first end surface of the transparent body is formed by thermal treatment, even if dirt such as organic matter adheres to the surface of the transparent precursor, heat cleaning is performed, and light loss due to the dirt can be suppressed.
- the first end surface of the transparent body is preferably an unpolished surface.
- the first end surface of the transparent body becomes a mirror surface or a surface close to the mirror surface by thermal treatment, so that it is possible to omit a polishing step that causes a cost increase,
- it is possible to suppress a reduction in reflection loss that makes it difficult for polishing flaws to enter the end face it is possible to obtain a surface that is optically superior to a polishing surface that uses force.
- a region force convex spherical surface having a radius of 75 m or more around the axial center line of the sleeve at the first end surface of the transparent body is preferable.
- the convex spherical surface need not be a convex spherical surface having a single radius of curvature over the entire region, and may be a surface in which convex spherical surfaces having different curvature radii are smoothly and continuously connected. .
- the curvature radius of the convex spherical surface and the inner diameter d of the sleeve have a relationship of p> dZ2.
- the radius of curvature of the convex spherical surface is preferably 3 to 50 mm.
- a ferrule holding member for an optical receptacle made to solve the second technical problem includes a sleeve having an inner hole for inserting a ferrule, and the sleeve.
- a transparent body having a first end face disposed in the inner hole of the rib and for contacting the end face of the ferrule at an intermediate position in the axial direction of the sleeve, and the transparent body is connected to the inner surface of the sleeve. It is characterized in that it is fixed directly by thermal treatment.
- the ferrule holding member for the optical receptacle is composed of the sleeve and the transparent body, and the transparent body is directly and thermally fixed to the inner surface of the sleeve.
- the connection loss is small and the coupling efficiency is not lowered.
- the optical fiber is not attached to the transparent body, the advantages associated with this can be obtained.
- the transparent body precursor can be softened and deformed to thermally fix the transparent body to the inner surface of the sleeve. Therefore, the yield can be improved, and the transparent precursor can be produced at low cost.
- the transparent body is thermally bonded to the inner surface of the sleeve, the bonding efficiency is reduced without changing the bonding position of the transparent body even when exposed to fluctuations in temperature or high temperature and humidity. There is no risk of incurring.
- the adhesion strength between the sleeve and the transparent body is 49 N or more.
- the fixing strength is 49N or more, the transparent body can be prevented from loosening, and the durability can be improved.
- the fixing strength between the sleeve and the transparent body after standing at a high temperature and high humidity of 85 ° C and 85% Rh for 2000 hours is 49N or more.
- the transparent body and the sleeve are preferably hermetically sealed.
- the airtightness of the space formed between the optical receptacle and the optical element in Kogu specifically hereinafter 1 X 10- 9 Pa'm 3 / sec High airtightness can be maintained.
- the means for performing the thermal treatment is arc discharge, laser, flame or Is preferably a heat treatment furnace or other indirect heating.
- the thermal treatment here refers to both a thermal treatment for making the first end surface of the transparent body a convex curved surface and a thermal treatment for fixing the transparent body to the inner surface of the sleeve. Including. These are preferably performed simultaneously by the same thermal treatment.
- a CO laser wavelength: 10 m
- an electric furnace is used as the heat treatment furnace.
- a furnace can be used.
- the 10Log ⁇ (nf-nb) 2 / (nf + nb) 2 ⁇ force becomes 3 ⁇ 47 or more, so that the reflected return light can be suppressed and the optical characteristics are adversely affected. It is avoided. In this case, it is more preferable that ⁇ 10Log ⁇ (nf-nb) (nf + nb) 2 ⁇ is 40 or more.
- the average thermal expansion coefficient differential force between 30 and 380 ° C between the sleeve and the transparent body is preferably 8 ppmZ ° C or less.
- the difference in average thermal expansion coefficient between 30 and 380 ° C between the sleeve and the transparent body is more preferably lppmZ ° C or less.
- the transparent body preferably has an infrared light transmittance of 85% or more at a wavelength of 800 to 1700 nm at a wall thickness of 1 mm.
- the transparent body is advantageous for transmitting the optical communication wavelength, and is suitable for optical communication applications.
- the transparent body and the Z or sleeve are advantageous in transmitting ultraviolet light.
- the isolator chip is fixed to the end face of the transparent body using an ultraviolet curable adhesive. It is.
- the transparent body preferably has a glass strength.
- the transparent body has glass strength, it has excellent weather resistance.
- the transparent body has a borosilicate glass strength.
- the transparent body when the transparent body also has a borosilicate glass power, it has an advantage that it has a thermal expansion coefficient that is close to or the same as that of the sleeve material, and has a small difference in refractive index from the core portion of the optical fiber, which is particularly excellent in weather resistance. It becomes.
- the borosilicate glass is specifically, by mass%, SiO 65-85%
- borosilicate glass has a mass of 0 / ⁇ , SiO 67 ⁇ 80%, BO 12 ⁇ 19%, Li O + Na O + KO 2 ⁇ 9.5
- a flat surface inclined with respect to the axial perpendicular surface of the sleeve is formed on the second end surface opposite to the first end surface of the transparent body.
- the sleeve is preferably made of ceramics, crystallized glass, metal or resin.
- a slit is formed in the sleeve.
- the slit is preferably formed so as to extend parallel to the direction along the axis of the sleeve.
- the first technical problem and the second technical problem are also solved by an optical receptacle using the optical receptacle ferrule holding member configured as described above.
- a method for manufacturing a ferrule holding member for an optical receptacle according to the present invention for solving the first technical problem includes a sleeve having an inner hole for inserting a ferrule, and the sleeve
- the sleeve When manufacturing a ferrule holding member for an optical receptacle comprising a transparent body having a first end face for contacting the end face of the ferrule at an intermediate position in the axial direction of the sleeve.
- the step of forming the first end face of the transparent body into a convex curved surface is characterized in that after the transparent body precursor is inserted into the inner hole of the sleeve, the transparent body precursor is softened using a thermal treatment means. Is.
- the ferrule (plug ferrule) can be obtained only by inserting the transparent body precursor into the inner hole of the sleeve and softening the transparent body precursor by a thermal treatment means. Since the first end face of the transparent body that contacts the end face of the transparent body can be a convex curved surface due to surface tension or the like, the manufacturing cost is reduced and the connection loss is reduced. Also, the first end surface of the transparent body is solidified after being softly deformed by the heat treatment means, so that the characteristics or properties thereof can be a mirror surface or a surface close to the mirror surface.
- the transparent body precursor is softened and deformed by thermal treatment, and the first end face is formed into a convex curved surface having an appropriate shape. Therefore, the yield that the tolerance of the dimensional accuracy of the transparent body precursor is large is improved, and the transparent body precursor can be produced at low cost.
- the first end face of the transparent body is formed by thermal treatment, even if dirt such as organic matter adheres to the surface of the transparent precursor, it is heat cleaned and effectively removes dirt that increases light loss. Can be removed.
- the manufacturing method of the ferrule holding member for an optical receptacle according to the present invention made to solve the second technical problem includes a sleeve having an inner hole for inserting a ferrule, and the sleeve
- a ferrule holding member for an optical receptacle comprising a transparent body having a first end face for contacting the end face of the ferrule at an intermediate position in the axial direction of the sleeve.
- the step of adhering the transparent body and the sleeve is characterized in that after the transparent body precursor is inserted into the inner hole of the sleeve, the transparent body precursor is softened using a thermal treatment means. .
- the transparent body can be applied to the inner surface of the sleeve only by inserting the transparent body precursor into the inner hole of the sleeve and softening the transparent body precursor by a thermal treatment means. Since it can be directly and thermally fixed, the manufacturing cost and the connection loss can be reduced. Furthermore, even if the dimensional accuracy of the transparent body precursor is poor, the transparent body precursor can be softened and deformed to thermally fix the transparent body to the inner surface of the sleeve. Yield increases, and a transparent precursor can be produced at low cost.
- the transparent body is thermally bonded to the inner surface of the sleeve, the bonding efficiency of the transparent body does not change even when exposed to fluctuations in temperature or high temperature and high humidity environments, resulting in a decrease in bonding efficiency. There is no fear.
- the thermal treatment means is preferably arc discharge, laser, flame, heat treatment furnace or other indirect heating.
- the transparent body precursor can be easily softened and deformed, and the first end face of the transparent body can be formed into an appropriate convex curved surface by surface tension or the like.
- deviation eccentricity
- Indirect heating is performed, for example, by heating the entire sleeve in which the transparent body precursor is placed in the inner hole using a heat treatment furnace. The heat treatment temperature at this time is higher than the soft soft spot of the sleeve or the soft soft spot of the glass rod lower than the melting point.
- the transparent body precursor is preferably a glass rod or a resin rod.
- the transparent precursor is easily and reliably softened and solidified into a transparent body having the convex curved surface as the first end surface by a thermal treatment means, or a transparent body is formed on the inner surface of the sleeve. It can be easily and reliably thermally fixed.
- the glass rod is mass%
- a resin rod can also be used, and specifically, a thermoplastic resin such as polycarbonate resin, polyethylene resin, polypropylene resin, talyl resin, and fluorine resin can be used.
- the end surface of the glass rod or the resin rod is preferably chamfered.
- the first end surface of the transparent body attached to the inner hole of the sleeve is Since the convex surface is formed by thermal treatment, the characteristics or properties of the first end surface can be made to be a mirror surface or a suitable surface close to the mirror surface, and the manufacturing cost can be reduced and the connection loss can be reduced. . In addition, even if dirt such as organic matter adheres to the surface of the transparent body precursor, the first end face of the transparent body is heat-cleaned to become a clean surface. It is possible to suppress light loss due to the like.
- the transparent body attached to the inner hole of the sleeve is used as the inner surface of the sleeve. Since it is fixed directly and thermally by heat treatment, the two can be firmly fixed, the manufacturing cost can be reduced and the connection loss can be reduced, and the tolerance of the dimensional accuracy of the transparent precursor can be increased. Furthermore, even when exposed to fluctuations in temperature or high temperature and high humidity environments, the bonding position of the transparent body does not change, and the reduction in bonding efficiency can be suppressed as much as possible.
- FIG. 1 is a longitudinal front view showing an optical receptacle on which a ferrule holding member for an optical receptacle according to an embodiment of the present invention (hereinafter simply referred to as a ferrule holding member) is mounted
- FIG. 2 is a ferrule according to an embodiment of the present invention.
- FIG. 6 is a longitudinal front view showing a state in which the plug ferrule is inserted into the holding member.
- the optical receptacle 1 is obtained by mounting a ferrule holding member 3 inside a holder 2 having a flange 2a at the end on the base end side.
- the ferrule holding member 3 includes a cylindrical sleeve 4 fitted and fixed in the fitting hole of the holder 2, and a cylindrical solid transparent member thermally fixed to the inner surface of the base end side of the sleeve 4.
- Body 5 is a component.
- the first end surface 5a on the distal end side of the transparent body 5 is located in the middle of the sleeve 4 in the axial direction (substantially central portion in the axial direction).
- the first end surface 5a of the transparent body 5 is a convex curved surface obtained by thermal treatment and an unpolished surface, and the axial center line Z of the sleeve 4 A region with a radius of 75 ⁇ m or more centered on is a convex spherical surface.
- the curvature radius p of the convex spherical surface and the inner diameter d of the sleeve 4 have a relationship of p> dZ2, and specifically, the curvature radius p of the convex spherical surface is set to 3 to 5 Omm. .
- the end surface 6 a of the plug ferrule 6 inserted from the front end side force of the sleeve 4 is configured to contact the convex spherical surface of the first end surface 5 a of the transparent body 5.
- the optical fiber 7 mounted in the inner hole of the plug ferrule 6 has a diameter of the core portion 7a of about 10 ⁇ m and a diameter of the outer peripheral side cladding portion 7b of about 125 ⁇ m.
- the convex spherical surface of the first end surface 5 a of the transparent body 5 is configured to contact the core portion 7 a of the optical fiber 7.
- the transparent body 5 is fixed directly and thermally on the inner surface of the sleeve 4, and the fixing strength of both is set to 49 N or more. Even after standing for 2000 hours under high temperature and high humidity of% Rh, it is fixed so as to have a strength of 49N or more.
- the transparent body 5 and the sleeve 4 are hermetically sealed.
- both the thermal treatment means for fixing the transparent body 5 to the inner surface of the sleeve 4 and the thermal treatment means for making the first end surface 5a of the transparent body 5 a convex curved surface are both arc discharges.
- Laser, flame, heat treatment furnace or other indirect heating is used.
- a CO laser (wavelength: 10 m) is used as the laser, and an electric furnace is used as the heat treatment furnace in the indirect heating.
- the refractive index (nb) of the transparent body 5 and the refractive index (nf) of the core portion 7a of the optical fiber 7 attached to the inner hole of the plug rule 6 are 10Log ⁇ (nf-nb) V (nf + nb) 2 ⁇ ⁇ 37 is satisfied.
- the difference in average thermal expansion coefficient between the sleeve 4 and the transparent body 5 at 30 to 380 ° C. is 8 ppm / ° C. or less, preferably lppm Z ° C. or less.
- the transparent body 5 has an infrared light transmittance of 85% or more at a wavelength of 800 to 1700 nm at a wall thickness of 1 mm, and at least a part or all of the transparent body 5 and the sleeve 4 ( In this embodiment, all of the transparent body 5) has an ultraviolet light transmittance of 75% or more at a wavelength of 300 to 450 nm with a thickness of 1 mm.
- the transparent body 5 also has glass or resin, preferably borosilicate glass power, and borosilicate glass is SiO 65-85 in mass%.
- borosilicate glass has a mass of 0 / o, SiO 67-80%,
- the sleeve 4 is a cylindrical single member, and can be formed of ceramics, crystallized glass, metal, or resin.
- ceramics zirconia
- crystallized glass Li O -Al O — SiO system, j8-spodumene solid as main crystal phase
- Crystallized glass on which a solution is deposited is deposited.
- the sleeve 4 is Li O -Al O -SiO system
- the second end surface 5 b opposite to the first end surface 5 a of the transparent body 5 is 4 with respect to the axial perpendicular surface (surface perpendicular to the axial center line Z) 8 of the sleeve 4.
- the end surface 4b on the base end side of the sleeve 4 is also a flat surface that is flush with the same inclination angle ex.
- FIG. 3 is a longitudinal front view showing an optical receptacle equipped with a ferrule holding member according to another embodiment of the present invention.
- the optical receptacle 21 is obtained by mounting a ferrule holding member 23 inside a holder 22 having a flange 22a.
- the ferrule holding member 23 is made of an insulating material made of ceramics, crystallized glass, glass, or resin, and has a cylindrical thick sleeve 24 fitted and fixed in the fitting hole of the holder 22.
- a cylindrical solid transparent body 5 that is thermally fixed to the inner surface on the proximal end side of the sleeve 24 is a constituent element.
- the sleeve 24 Only the base end portion of the sleeve 24 is press-fitted or bonded and fixed to the holder 22, and the holder 22 has a shape that does not cover the distal end portion of the sleeve 24. Further, since the sleeve 24 is thicker than the sleeve 4 used in the optical receptacle 1 shown in FIG. 1, the sleeve 24 is excellent in mechanical strength, and the tip portion is covered by the holder 22 even if it is not necessary. Hard to break! / If the optical receptacle 21 has such a structure, the tip thereof does not emit or receive electromagnetic waves as an antenna (because the tip of the sleeve 24 is not covered by the holder 22). ), Mounting an optical receptacle, and it is difficult to adversely affect transmission / reception electronic components (for example, laser diodes).
- transmission / reception electronic components for example, laser diodes
- ferrule holding members 3 and 23 having the above-described configuration are manufactured by the following method.
- a glass material is drawn to produce a long original glass rod 9, and the plurality of original glass rods 9 thus manufactured are indicated by reference B in FIG.
- the glass rods 10 are cut into a predetermined dimension in the axial direction, and both end surfaces thereof are roughly polished, so that a plurality of glass rods 10 as transparent precursors are collected at a time, as indicated by symbol C in FIG. Get at the same time.
- both end faces 11a of the respective glass rods are chamfered l ib, and the chamfered glass rod 11 is made of ceramics (as shown by E in the figure).
- Zircoyu or crystallized glass (Li O-Al O -SiO system, mainly
- Crystalline glass that precipitates ⁇ -spodumene solid solution as a crystalline phase is inserted into the inner hole of cylindrical sleeve 4.
- the built-in body 12 is put in an electric furnace or is
- the glass rod 11 is irradiated with light and light from the opening 4c on the distal end side of the sleeve 4 to deform the glass rod 11 softly.
- the end surface (first end surface) 11a on the front end side of the glass rod 11 becomes a convex curved surface due to surface tension, and at the same time, the glass rod 11 is thermally fixed to the inner surface of the sleeve 4.
- the base end side end portion of the built-in body 12 is polished to make the base end side end portion an inclined flat surface, whereby the ferrule holding member 3 as described above is obtained. Note that the above manufacturing method can be performed in the same procedure even when a raw resin rod made of a long resin material is used as a starting material.
- optical receptacle holding member of the present invention will be described in detail based on examples.
- different thermal treatments were performed using different glass rods 11 and sleeves 4, and various evaluations were performed.
- the results are shown below.
- Table 1 shows Examples 1 to 4 using an electric furnace
- Table 2 shows Examples 5 and 6 using a carbon dioxide laser.
- the refractive index at a wavelength of 1310 nm of the core portion of the optical fiber one (SMF) was 1.452
- the refractive index at a wavelength of 1550 was 1.449.
- the ferrule holding member of Examples 1 to 4 was obtained by placing in a set electric furnace and holding the heat treatment time shown in Table 1 and softening and taking out the glass rod.
- the difference in average thermal expansion coefficient between the glass rod (transparent body) and the sleeve at 30 to 380 ° C. is 3.2 ppm / ° in Examples 1 to 3.
- Example 4 0.5 ppm / °. Met.
- a distance D to a certain reference surface force transparent body 5 in the sleeve 4 is measured in advance, and a predetermined force is applied to the first end surface 5a of the transparent body 5 for a predetermined time (10 seconds). Then measure the distance D again, and if the distance does not change within the measurement error range, the printing force! It must have a fixed strength greater than As a result of experiments based on such technical ideas, in Examples 1 to 4 by the electric furnace heating shown in Table 1 above and Examples 5 and 6 by the laser shown in Table 2 above, the fixing strength exceeds 98 N. It was found that all showed sufficient bond strength.
- Table 3 above shows the 4 °, 6 °, 8 °, and 15 ° angles of the second end surface of the ferrule holding member of Example 4 described above with respect to the axis perpendicular to the axis of the sleeve 4 (inclination angle of the flat surface).
- 2 shows the results of measuring the coupling efficiency of six optical receptacles each configured as a plane having a gap. In the measurement of the coupling efficiency, as shown in FIG. 6, first, the ferrule 6 on which the optical fiber 7 is mounted is inserted into the optical receptacle 1 and kept in a state where a pressing pressure of about 1 kgf is applied.
- the laser diode 12 is driven at a constant current by the DC stabilized power supply 13, and the light emitted from the laser diode 12 is condensed by the condenser lens 14 and incident from the second end face side of the transparent body 5,
- the coupling efficiency is evaluated based on the value measured by the optical power meter 15 of the optical power transmitted to the optical fiber 7 when the optical axis is adjusted so that the optical coupling efficiency with the optical fiber 7 is maximized.
- Table 3 above shows the measured values.
- the optical power meter 15 measured the optical power transmitted to the optical fiber 7 when coupled directly to the optical fiber 7 mounted on the ferrule 6 without using the optical receptacle 1 under the same conditions (coupling efficiency).
- Coupled efficiency was 512 / z W.
- the inclination angle of the flat surface is 4-15 °. It was found that the coupling efficiency of the ferrule holding member of Example 4 was kept high.
- FIG. 1 is a longitudinal front view showing an optical receptacle equipped with a ferrule holding member according to an embodiment of the present invention.
- FIG. 2 is an enlarged vertical front view of a main part showing a state in which a ferrule (plug ferrule) is inserted into a ferrule holding member according to an embodiment of the present invention.
- FIG. 3 is a longitudinal sectional front view showing an optical receptacle equipped with a ferrule holding member according to another embodiment of the present invention.
- FIG. 4 is a schematic view showing the manufacturing status of the ferrule holding member according to the embodiment of the present invention.
- FIG. 5 is a schematic view for explaining an experimental result in the example of the present invention.
- FIG. 6 is a schematic diagram for explaining a coupling efficiency measurement method in an example of the present invention. Explanation of symbols
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/596,368 US7771129B2 (en) | 2004-07-15 | 2005-07-06 | Ferrule holding member for an optical receptacle, method of manufacturing the same, and optical receptacle using the same |
EP05757799A EP1767970A4 (en) | 2004-07-15 | 2005-07-06 | FERRULE SUPPORT FOR OPTICAL SOCKET, METHOD FOR PRODUCING FERRULE SUPPORT AND OPTICAL SOCKET EMPLOYING FERRULE SUPPORT |
KR1020067026254A KR101112517B1 (ko) | 2004-07-15 | 2005-07-06 | 광 리셉터클용 페룰 유지 부재 및 그 제조 방법, 그것을사용한 광 리셉터클 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004208627 | 2004-07-15 | ||
JP2004-208627 | 2004-07-15 | ||
JP2005-195179 | 2005-07-04 | ||
JP2005195179A JP4606954B2 (ja) | 2004-07-15 | 2005-07-04 | 光レセプタクル用フェルール保持部材及びその製造方法並びにそれを用いた光レセプタクル |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006008965A1 true WO2006008965A1 (ja) | 2006-01-26 |
Family
ID=35785085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/012468 WO2006008965A1 (ja) | 2004-07-15 | 2005-07-06 | 光レセプタクル用フェルール保持部材及びその製造方法並びにそれを用いた光レセプタクル |
Country Status (6)
Country | Link |
---|---|
US (1) | US7771129B2 (ja) |
EP (1) | EP1767970A4 (ja) |
JP (1) | JP4606954B2 (ja) |
KR (1) | KR101112517B1 (ja) |
TW (1) | TWI382211B (ja) |
WO (1) | WO2006008965A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US7989379B2 (en) * | 2005-06-29 | 2011-08-02 | Nippon Electric Glass Co., Ltd. | Optical glass |
CN103299224A (zh) * | 2011-01-11 | 2013-09-11 | 康宁股份有限公司 | 带有具有相对的成一定角度的平表面的透镜的光连接器 |
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JP2007304469A (ja) * | 2006-05-15 | 2007-11-22 | Fujifilm Corp | レーザモジュールおよびその組立装置 |
JP2008046520A (ja) * | 2006-08-21 | 2008-02-28 | Fujifilm Corp | 光コネクタ並びに光ファイバモジュールおよびその組立方法 |
JP2009139895A (ja) * | 2007-12-11 | 2009-06-25 | Sumitomo Electric Ind Ltd | 光モジュールおよび光モジュールの製造方法 |
JP5071673B2 (ja) * | 2008-04-28 | 2012-11-14 | 住友電気工業株式会社 | 光レセプタクル |
JP5093898B2 (ja) * | 2008-06-25 | 2012-12-12 | 富士フイルム株式会社 | 多心フェルール及び光ファイバの接続構造 |
EP2264420A1 (en) * | 2009-06-19 | 2010-12-22 | Acterna, LLC | Optical reflective marker adaptor for a patch cord in OTDR applications |
WO2012058240A1 (en) * | 2010-10-26 | 2012-05-03 | Biolase Technology, Inc. | Collimating coupler for laser treatment devices |
EP3064166B1 (de) * | 2015-03-06 | 2018-07-04 | Schott AG | Hermetisch abgedichtete led-leuchte sowie verfahren zur herstellung einer hermetisch abgedichteten led-leuchte |
JP2017122754A (ja) * | 2016-01-04 | 2017-07-13 | 株式会社エンプラス | 光レセプタクル、光モジュールおよび測定方法 |
KR20220029032A (ko) | 2020-09-01 | 2022-03-08 | 송기창 | 온돌 마루용 1액형 접착제 조성물 |
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CN103299224A (zh) * | 2011-01-11 | 2013-09-11 | 康宁股份有限公司 | 带有具有相对的成一定角度的平表面的透镜的光连接器 |
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Also Published As
Publication number | Publication date |
---|---|
TWI382211B (zh) | 2013-01-11 |
US7771129B2 (en) | 2010-08-10 |
KR20070042923A (ko) | 2007-04-24 |
JP2006053537A (ja) | 2006-02-23 |
US20080193087A1 (en) | 2008-08-14 |
JP4606954B2 (ja) | 2011-01-05 |
TW200604612A (en) | 2006-02-01 |
KR101112517B1 (ko) | 2012-03-14 |
EP1767970A1 (en) | 2007-03-28 |
EP1767970A4 (en) | 2011-02-09 |
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