JP4374280B2 - Optical connection structure and manufacturing method thereof - Google Patents

Description

The present invention relates to an optical connection structure and a manufacturing method thereof, and more particularly to a technique suitable for connecting single-core and multi-core optical fibers.

  Connection parts (connectors) such as FC, SC, MU, LC, and the like for MPF, MPX, and MTP types are provided for single-fiber connection of optical fibers, and for multi-fiber connection. Generally, these connectors can be connected by abutting from the axial direction of the optical fiber. For example, in an MPO type optical connector, plugs are inserted into the adapter from both sides, so that the plugs are positioned in the internal housing built in the adapter, and the MT connector ferrules held at the tip of the plug are abutted and connected. Is done.

  In particular, a push-pull method that facilitates insertion and removal of the optical fiber in the axial direction has been proposed. These push-pull connectors are inserted and removed in the axial direction of the optical fiber to be connected. Regarding the connection with the adapter attached to the apparatus wall surface, there is a feature that an optical fiber can be easily connected.

  By the way, in the conventional optical connection structure, when used for optical fiber connection on a printed circuit board (for example, a mother board) or in an apparatus, an optical connector is attached to the tip of the optical fiber connected to various optical components and optical modules. In many cases, the optical fiber connected to the optical component or the optical module is inserted and removed while bending the optical fiber.

On the other hand, as a technology related to this type, a connecting means for connecting butted ends of a pair of optical fibers to each other is connected to a base formed at the center of the upper surface, and a lid attached to the upper surface side of the base A thing provided with a body is proposed (for example, refer to patent documents 1).
JP-A-8-240731 (page 2-4, FIGS. 1 to 3)

  However, in the conventional optical connection structure, when the optical fiber connected to the optical component or the optical module is inserted or removed while bending, an excessive force due to the bending acts on the fixing portion of the optical fiber optical module, and the fixing portion is damaged. There was a fear.

  Also, in the conventional optical connection structure, the field of view of the operator in the insertion / removal direction is deteriorated, so that the work time becomes long, and when inserting, the end of the ferrule is split and brought into contact with the sleep or the guide shaft, causing damage or damage There was a fear. In addition, it is necessary to consider the arrangement of other devices in order to secure the space for inserting and removing the connector, and the space on the board cannot be effectively used because it cannot be installed.

  Further, in the conventional optical connection structure, the attaching / detaching direction is not stable, and the optical fiber connecting component may come into contact with the surrounding components due to the reaction, which may damage the optical fiber or the surrounding components. Further, in order to shorten the connection time or improve the connection workability, the latch is engaged at the time of attachment / detachment using a latch mechanism to simplify the attachment / detachment operation. Maintains stable pressure. However, this method complicates the structure and increases the number of parts, so that it takes a lot of time and money to design the optical connector, which increases the cost.

  On the other hand, what was described in Patent Document 1 was not considered for connecting the optical fiber after being bent.

  The present invention has been made in consideration of such circumstances, and when connecting optical fibers, it is easy to assemble, and the connection work can be performed without damaging the optical fiber fixing portion in the optical component or the optical module. An object of the present invention is to provide an optical connection structure that can be easily performed and that can effectively use a space on a substrate, and a method for manufacturing the same.

  In order to achieve the above object, according to the present invention, on the adapter having the alignment groove whose upper surface is opened, the optical connection for optically connecting the tips of the first and second optical fibers to each other in the alignment groove A pin-shaped introduction member is held by a plug attached to the adapter, the first optical fiber is inserted into the plug, and the distal end side of the first optical fiber is connected to the plug. The first optical fiber is bent as a bent portion, the rear portion of the first optical fiber is fixed to the plug, the second optical fiber is installed in the alignment groove, and then the plug is attached to the adapter. Mounting, pressing the tip ends of the first and second optical fibers from the vertical direction with the pin-shaped introduction member to closely support the alignment grooves, and extending the bent portions of the first optical fibers; Of the first optical fiber Optical connecting structure, characterized in that to match the end to the distal end of the second optical fiber is provided.

  According to the present invention, there is provided an optical connection structure for optically connecting the tip ends of the first and second optical fibers to each other in the alignment groove on the adapter having the alignment groove having an open upper surface, A pin-like introduction member is held by the first and second plugs attached to the adapter, and the first and second optical fibers are respectively inserted into the first and second plugs. The distal end side of the optical fiber is bent as a bent portion in the plug, while the rear portion of the first optical fiber is fixed to the plug, and the first and second plugs are attached to the adapter. Mounting, pressing the tip ends of the first and second optical fibers from the vertical direction with the pin-shaped introduction member to closely support the alignment grooves, and extending the bent portions of the first optical fibers; Of the first optical fiber Optical connecting structure, characterized in that to match the end to the distal end of the second optical fiber is provided.

  According to the present invention, there is provided an optical connection structure for optically connecting the tip of the first optical fiber and the optical joint surface of the optical component to each other on an adapter having an alignment groove whose upper surface is opened, A pin-shaped introduction member is held by a plug attached to the adapter, and the first optical fiber is inserted into the plug, and the distal end side of the first optical fiber is bent as a bent portion in the plug. On the other hand, the rear part of the bent portion of the first optical fiber is fixed to the plug, the optical component is aligned with the alignment groove of the adapter, and placed on the adapter, and the plug is attached to the adapter. The first optical fiber is pressed from the vertical direction with the pin-shaped introduction member so that the tip end of the first optical fiber is pressed and supported in close contact with the alignment groove, and the bent portion of the first optical fiber is extended. Fiber optic tip Optical connecting structure, characterized in that matching to the optical junction surface of the optical component is provided.

  The plug has a bent cell portion as a space for accommodating the bent portion of the first optical fiber, and an optical fiber fixing portion for fixing a rear portion from the bent portion of the first optical fiber at one end portion. It only has to have. In addition, a fiber bending member that presses the first optical fiber to form the bent portion while opening the bent portion may be detachably attached to the plug.

  The pin-shaped introduction member only needs to be held by an attachment hole or an attachment groove of the plug. The pressing fixing member that presses the pin-shaped introduction member from the vertical direction only needs to be attached to the adapter. The pin-shaped introduction member may be a columnar shape or a polygonal shape. The plug may be attached and detached in a direction perpendicular to the upper surface of the adapter. The plug and / or the pressing and fixing member may be fixed to the adapter by the engaging member.

  According to the present invention, there is provided a method for producing an optical connection structure in which a first optical fiber and a second optical fiber are optically connected to each other in an alignment groove on an adapter having an alignment groove having an open upper surface, An attachment process for attaching a pin-shaped introduction member to a plug to be attached to the adapter, and inserting the first optical fiber into the plug, and bending the tip side of the first optical fiber within the plug to form a bent portion On the other hand, a bending step of fixing the rear of the bent portion of the first optical fiber to the plug, an optical fiber installation step of installing the second optical fiber in the alignment groove, and attaching the plug to the adapter A mounting step, an optical fiber contact support step of pressing the tip ends of the first and second optical fibers from the vertical direction with the pin-shaped introduction member to support the alignment grooves closely, and extending the bent portion; The Against the leading end of the second optical fiber by moving the tip of the first optical fiber, a manufacturing method of the optical connecting structure; and a connection step of the optical connection is provided.

  According to the present invention, there is provided a method for producing an optical connection structure in which a first optical fiber and a second optical fiber are optically connected to each other in an alignment groove on an adapter having an alignment groove having an open upper surface, An attachment step of attaching a pin-like introduction member to the first and second plugs to be attached to the adapter, inserting the first and second optical fibers into the first and second plugs, and the first optical fiber A bending step of bending the distal end side of the first optical fiber as a bent portion while fixing the rear portion of the first optical fiber to the plug, and attaching the first and second plugs to the adapter A mounting step, an optical fiber contact support step for pressing and supporting the tip ends of the first and second optical fibers from the vertical direction with the pin-shaped introduction member to closely support the alignment groove, and extending the bent portion; The first light beam Against the leading end of the second optical fiber by moving the tip of the driver, a manufacturing method of the optical connecting structure; and a connection step of the optical connection is provided.

  According to the present invention, on an adapter having an alignment groove whose upper surface is opened, a method for producing an optical connection structure for optically connecting a tip of a first optical fiber and an optical joint surface of an optical component to each other, An attachment step of attaching a pin-shaped introduction member to a plug to be attached to the adapter; and inserting the first optical fiber into the plug and bending the distal end side of the optical fiber as a bent portion in the plug; A bending step of fixing the rear of the bent portion of the first optical fiber to the plug; an optical component installation step of aligning the optical component with the alignment groove of the adapter and installing the optical component on the adapter; and the plug Attaching the adapter to the adapter, pressing the tip of the first optical fiber from the vertical direction with the pin-shaped introduction member to closely support the alignment groove, and supporting the first optical fiber. And a connecting step of extending the bent portion of the optical fiber and connecting the tip end of the first optical fiber to the optical joint surface of the optical component. .

  The bending step may be performed by pressing the optical fiber with a fiber bending member to form a bent portion. The optical fiber contact and support step may include a step of attaching a pressing and fixing member to the adapter, and the pin-shaped introduction member pressed by the pressing and fixing member pressing the optical fiber. In the mounting step, the plug may be mounted so as to be detachable in the crossing direction with respect to the upper surface of the adapter.

  According to the present invention, the optical fiber can be reliably introduced into the alignment groove by the pin-like introduction member and brought into close contact with each other, and the effect of aligning the optical fibers with each other can be obtained. Further, the plug having the first optical fiber formed with the bent portion is attached to the adapter, and the optical fiber is optically connected to each other by opening and extending the bent portion of the first optical fiber. Therefore, the assembly is easy, and the connection work can be easily performed without damaging the optical fiber fixing portion in the optical component or the optical module. Furthermore, the space on the board can be used effectively, and therefore, the yield can be improved and the connection work efficiency can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The optical connection structure shown in FIG. 1 includes a first plug 3 to which a first optical fiber as shown in FIG. 2 is attached and an adapter 5 having an alignment groove 10 as shown in FIG. The first plug 3 in FIG. 2 includes an optical fiber fixing portion 6 that fixes a part of the optical fiber 1, a pin-like introduction member 8 attached to the attachment hole 7, and a latch 9. The adapter 5 includes an alignment groove 10 and a latch engaging portion 11.

  A method for manufacturing such an optical connection structure will be described below with reference to FIGS. First, the second optical fiber 2 is fixed to the adapter 5 (see FIG. 4A). Next, the front end side of the first optical fiber 1 fixed to the first plug 3 at the optical fiber fixing portion 6 is bent, and the first plug 3 is attached to the adapter 5 (see FIG. 4B). ). At that time, the first optical fiber and the second optical fiber are tightly supported in the alignment groove 10 by the pressing of the pin-shaped introduction member 8 (8a, 8b, 8c, 8d) of the first plug 3, and thereby are mutually connected. Aligned. Thereafter, the bent first optical fiber 1 is extended so that the first optical fiber 1 and the second optical fiber 2 are abutted, and the optical connection structure of the present invention is manufactured (FIG. 4 ( c)).

  Therefore, when connecting an optical fiber on a printed circuit board or in an apparatus, a plug is attached to the adapter from above, so that no connection work space is required on the circuit board, and space can be saved. Further, after the plug is attached to the adapter, the end of the optical fiber can be moved by extending the bent optical fiber, and the optical fiber can be connected. Therefore, since the optical fibers to be connected do not give each other an impact due to abrupt contact, there is no fear of breakage, and the connection work can be performed easily and safely. In addition, by pressing the optical fiber against the V-groove with the pin-shaped member, the optical fibers can be reliably aligned with each other, and the tip of the optical fiber can move smoothly in the optical fiber axial direction.

  The present invention defines an optical connection structure for optically connecting the tips of the first and second optical fibers with each other in the alignment groove on an adapter having an alignment groove having an open upper surface. However, when the first optical fiber is directly optically connected to an optical component such as a laser module, that is, when the second optical fiber is not connected, the connection structure of the present application should be used in substantially the same form. Is possible. An example is shown in FIG. That is, reference numeral 12 shown in FIG. 5 indicates a laser module, and other reference numerals are the same as those in FIG. By extending the length of the first optical fiber 1 to the end face of the laser module 12, PC connection becomes possible.

  In addition, an electrical terminal such as a third frame may be attached so that the adapter in the optical connection structure of the present application can be integrated with a package used for a laser module or the like and further mounted on a printed circuit board or the like. Thus, the connection between the optical fiber and the optical component without the second optical fiber is also included in the present invention.

  6 shows an optical connection structure between the first optical fiber 1 attached to the first plug 3 and the second optical fiber 2 attached to the second plug 4. FIG. A first plug 3 as shown, a second plug 4 as shown in FIG. 8, and an adapter 5 having an alignment groove 10 into which two plugs as shown in FIG. 9 can be mounted. The first plug 3 and the second plug 4 in FIGS. 7 and 8 are an optical fiber fixing portion 6 for fixing a part of the optical fiber, and a pin-like introduction member attached to the attachment hole 7 of the pin-like introduction member. 8 (8a, 8b, 8c, 8d) and a latch 9 are provided. Further, the adapter is provided with an alignment groove 10 and a latch engaging portion 11.

  A method for manufacturing such an optical connection structure will be described below with reference to FIGS. First, the distal end side of the first optical fiber 1 fixed to the first plug 3 at the optical fiber fixing portion 6 is bent (see FIG. 10A), and the first plug 3 is attached to the adapter 5. Next, the 2nd plug 4 is mounted | worn with the adapter 5 (refer FIG.10 (c)). At this time, the first optical fiber 1 and the second optical fiber 2 are pressed by the pin-like introduction members 8 (8a, 8b, 8c, 8d) of the first plug 3 and the second plug 4 to form the alignment grooves 10. Are closely attached to each other and thereby aligned with each other (see FIG. 10C).

  Thereafter, the bent first optical fiber 1 is extended so that the first optical fiber 1 and the second optical fiber 2 are abutted, and the optical connection structure of the present invention is manufactured (FIG. 10 ( d)). In the manufacturing method of the optical connection structure shown in FIG. 10, the first optical fiber 1 is bent before the first plug 3 is attached to the adapter 5, but conversely, the first plug 3 is connected to the adapter 5. The first optical fiber 1 may be bent after being attached to.

  Therefore, according to the above, by attaching the second optical fiber 2 to the second plug 4, all the optical fibers can be handled separately from the adapter. As a result, the operation of installing the adapter on the substrate can be easily performed, and there is no possibility of damaging the optical fiber during the installation operation.

  In the first plug 3 used in the optical connection structure of the present invention described above, the bent shape of the bent portion of the first optical fiber 1 is not particularly limited. However, in consideration of the effect of protecting the optical fiber, the first plug described above is provided with a bent cell portion and the bent portion is accommodated in the plug. However, the present invention is not limited to this, and the optical fiber must be damaged. For example, the bent portion may be exposed. Further, the bent portion can be manufactured by attaching the fiber bending member 18 as shown in FIG. 11 to the first plug 3 from above the first plug 3.

  By using such a fiber bending member, it is possible to safely perform the bending process without directly shaking the optical fiber having a small diameter. In addition, the shape of the optical fiber after connecting the optical fibers or between the optical fiber and the optical component is the same as that of the second optical fiber before the first optical fiber 1 is fully extended in the process of extending the first optical fiber 1. 2 and the first optical fiber 1 may be held in a bent state. In some cases, the first optical fiber 1 may be fully extended and the second optical fiber 2 may be bent. In either case, there is no particular problem unless the optical fiber is broken and the optical characteristics are not affected.

  The first optical fiber 1 and the second optical fiber 2 are mounted on the adapter 5 by attaching the first and second plugs 3 and 4 to the adapter 5 by the pin-like introduction member 8 attached to each plug 3 and 4. 5 in the alignment groove 10. 12 is attached to the adapter 5 as shown in FIG. 13, and the pin-shaped introduction member 8 is sandwiched between the pressing and fixing member 14 and the alignment groove 10, thereby pressing the optical fiber. It can also be fixed.

  Thereby, the optical fibers 1 and 2 can be more reliably fixed in the alignment groove 10, and the optical characteristics can be further stabilized. Further, as a method of attaching the pin-like introduction member 8 to the plugs 3 and 4, in FIG. 1, a through-hole opened from the side surface of the first plug is used, but the pin-like introduction member 8 is held by the plugs 3 and 4. If possible, a shape such as a groove opened from the upper surface as shown in FIG. 14 can be employed. Further, when the pin-like introduction member 8 is pressed into the alignment groove 10 using the pressing fixing member 14, the through holes for holding the pins or the lowermost surfaces of the grooves are aligned so that the pins are directly pressed against the alignment groove 10. It is also preferable to attach the pin-like introduction member 8 to the plugs 3 and 4 so as to be positioned below the upper surface of the groove.

  The first and second plugs 3 and 4 described above can be detachably attached to the upper surface of the adapter 5 in the crossing direction. In this case, since the connection worker can perform the connection work from above, the workability is improved and the connection yield can be improved. Further, when the optical connection structure of the present invention is used on a printed board, there is no connection work parallel to the board surface, so that a work space necessary for connection on the board is not necessary. This saves space on the substrate.

  In the above description, when the plugs 3 and 4 or the pressure fixing member 14 are attached to the adapter 5, the latch 9 and the latch engaging portion 11 are used for fixing. However, as shown in FIG. As shown in FIG. 16, the engaging member 15 opened to the plug can be provided at the plug mounting portion 16 and the pressing fixing member mounting portion 17 of the adapter. The engaging member is engaged by engaging the plug or the protrusion 32 of the pressing and fixing member 14 with the window 31 of the engaging member. A latch may be provided. These engaging members may be attached separately from the adapter or may be integrally formed. Thereby, it becomes possible to easily attach and detach each member from above.

 The material and shape of the plug and adapter used in the above-described optical connection structure of the present invention are not particularly limited, and those made of plastic, ceramic, metal, zirconia, glass metal, etc. are preferably used. The shape is not particularly limited as long as the plug can be securely fixed to the adapter. The shape of the alignment groove provided in the adapter is not particularly limited as long as the optical fiber is aligned, but is preferably V-shaped to stably hold the columnar optical fiber. . In addition, the alignment groove may be integrated with the adapter or may be separate, and the material thereof is not limited. However, a material similar to the material of the adapter can be appropriately selected and used.

 The optical fiber used in the optical connection component of the present invention is appropriately selected and used according to the application purpose of the optical connection structure. For example, quartz or plastic single mode optical fiber, multimode optical fiber, etc. are preferably used. Is done. Moreover, there is no restriction | limiting in the number of optical fibers connected at once, The opposite optical fiber for the number of alignment grooves can be connected. Therefore, the number of optical fibers fixed to the plug is not particularly limited, and an optical fiber tape core bundled with optical fibers can be used in the same manner.

  With respect to the optical fiber connection method, PC (Physical Contact) connection may be performed by polishing the tip or butting the optical fibers together while being cut. In the case of using a refractive index matching agent, the material, form, and installation method are not particularly limited, and the material may be selected and used according to the refractive index and material of the optical fiber. For example, silicone oil, Silicone grease or the like is preferably used. The form of the refractive index matching agent may be liquid or solid, and may be, for example, oil, grease, gel, or film.

  In order to produce an optical connection structure as shown in FIG. 1, 15 mm of the coating of the 250 μm diameter optical fiber core wire is removed from the end, and the optical fiber strand (125 μm diameter) is cut at 10 mm from the coating end. The first optical fiber core wire 1 and the second optical fiber core wire 2 in FIG. 1 were prepared. Next, the first plug 3 shown in FIG. 2, the adapter 5 shown in FIG. 3, and the fiber bending member 18 shown in FIG. 11 were made of ABS resin. Further, the 4-core plastic V-groove 10 was cut and fixed to the adapter 5.

  The optical connection structure was produced as follows. This will be described below with reference to FIG. First, stainless steel pins 8a, 8b, 8c, and 8d are used as pin-like introduction members provided in the first plug, are attached to the pin attachment holes 7 of the first plug, and the tip of the first optical fiber 1 is attached to the stainless steel pin 8b. , 8c, the first optical fiber 1 was fixed to the optical fiber fixing portion 6 of the first plug 3 with an adhesive. Further, the second optical fiber was fixed to the adapter with an adhesive 19 so that the tip was located in the center of the V-groove.

  Next, a fiber bending member 18 (not shown) (not shown) is attached to the first plug 3 to bend the first optical fiber 1 and retract the end of the optical fiber by 1 mm (FIG. 4A). )reference). Thereafter, the first plug 3 is attached and fixed to the adapter 5 by engaging the latch 9 with the latch engaging portion 11, and the first light is inserted into the V groove 10 by the stainless pins 8 a, 8 b, 8 c, 8 d. The fiber 1 and the second optical fiber 1 are pressed to align the end surfaces of the first optical fiber 1 and the second optical fiber 2 (see FIG. 4B), and then from the first plug 3 By removing the fiber bending member 18, the first optical fiber 1 is extended so that the first optical fiber 1 and the second optical fiber 2 are abutted, and the optical connection structure of the present invention is obtained (see FIG. 4 (c)).

 As described above, the optical connection structure thus obtained does not require a connection work space on the substrate by attaching the plug to the adapter from above in the connection of the optical fiber on the printed circuit board or in the apparatus. Space saving is possible. In addition, after the plug was attached to the adapter, the bent optical fiber was stretched to move the end of the optical fiber, and the optical fiber could be connected. As a result, the optical fibers to be connected do not receive an impact due to sudden contact, so there is no risk of breakage, the connection work can be performed easily and safely, and the yield is improved to improve the connection work efficiency. Improved.

 Further, by pressing the optical fiber into the V-groove with the stainless steel pin, the optical fiber can be reliably aligned, and the tip of the optical fiber can move smoothly in the optical fiber axial direction. For this reason, the connection work can be performed with a higher yield. After that, when the connection loss was measured at the connection point, it was 0.5 dB or less, and it was confirmed that the optical connection structure was sufficiently usable.

  In order to produce an optical connection structure as shown in FIG. 17, the coating of the 250 μm diameter four-core optical fiber ribbon is removed 15 mm from the end, and the optical fiber (125 μm diameter) is 10 mm from the coated end. The first optical fiber ribbon 21 and the second optical fiber ribbon 22 were prepared.

  Next, the first plug 3 shown in FIG. 18, the second plug 4 shown in FIG. 19, the adapter 5 shown in FIG. 20, the press fixing member 14 shown in FIG. 21, and the fiber bending member 18 shown in FIG. It was produced by. Further, the 4-core plastic V-groove 10 was cut and fixed to the adapter 5. Further, three engaging members 15 as shown in FIG. 15 for fixing the pressing fixing member 14 and the plugs 3 and 4 to the adapter 5 were made of phosphor bronze.

  The optical connection structure was produced as follows. This will be described below with reference to FIG. First, the stainless steel pin 8a for pressing the optical fiber into the V-groove is mounted on the first plug 3 in the pin mounting groove 7, and the first optical fiber 1 protrudes 1.5 mm from the tip of the first plug 3 Then, the first optical fiber 1 was fixed to the optical fiber fixing portion 6 of the first plug 3 with an adhesive. In addition, three stainless steel pins 8b, 8c, 8d are installed in the pin mounting groove of the second plug 4, and the second optical fiber 2 tip is positioned between the stainless steel pins 8b, 8c. The optical fiber 2 was fixed to the optical fiber fixing portion 6 of the second plug 4 with an adhesive.

  The fiber bending member 18 was attached to the first plug 3 manufactured as described above, the first optical fiber was bent, and the end of the optical fiber was drawn 1 mm (see FIG. 22A). Thereafter, the first plug 3 is attached and fixed to the adapter 5 by the engaging member 15, and then the second plug 4 is similarly attached and fixed to the adapter 5 (see FIG. 22B), and then the stainless steel pin. The fiber bending member 18 is attached to the adapter 5 along the notches of the plugs 3 and 4 so that the 8a, 8b, 8c and 8d are sandwiched between the V-groove 10 and the engaging member is the same as the plugs 3 and 4. 15, the first optical fiber 1 and the second optical fiber 2 are pressed into the V groove 10 by the stainless steel pins 8 a, 8 b, 8 c, 8 d, and the first optical fiber 1 and the second optical fiber 2 are pressed. The end face of the optical fiber 2 is aligned (see FIG. 22 (c)), and then the fiber bending member 18 is detached from the plugs 3 and 4, whereby the first optical fiber 1 is extended and the first optical fiber 1 is extended. Optical fiber 1 and second optical fiber Butt driver 2, the optical connecting structure of the present invention was E obtained (see FIG. 22 (d)).

 The obtained optical connection structure had excellent effects similar to those of Example 1. Further, as described above, by attaching the second optical fiber 2 to the second plug 4, all the optical fibers can be handled separately from the adapter, and the work of installing the adapter on the board can be easily performed. As a result, there is no risk of damaging the optical fiber during installation.

 Further, by pressing and fixing the stainless pin 8 between the pressing fixing member and the V-groove, the optical fiber can be more securely fixed in the V-groove and the optical characteristics can be further stabilized. In addition, since the plug and the pressing fixing member are attached and fixed to the adapter using the engaging member opened upward, each member can be attached and detached more easily from above. As a result, the connection work can be performed with a higher yield. After that, when the connection loss was measured at the connection point, it was 0.5 dB or less, and it was confirmed that the optical connection structure was sufficiently usable.

FIG. 1 is a plan view showing an optical connection structure of the present invention. FIG. 2 is a plan view showing the optical connection structure of the present invention. FIG. 3 is a plan view showing the optical connection structure of the present invention. FIG. 4 is a plan view showing the optical connection structure of the present invention. FIG. 5 is a plan view showing another optical connection structure of the present invention. FIG. 6 is a plan view showing another optical connection structure of the present invention. FIG. 7 is a plan view showing another optical connection structure of the present invention. FIG. 8 is a plan view showing another optical connection structure of the present invention. FIG. 9 is a plan view showing another optical connection structure of the present invention. FIG. 10 is a plan view showing a method for producing the optical connection structure of the present invention. FIG. 11 is a plan view showing a method for producing the optical connection structure of the present invention. FIG. 12 is a plan view showing a method for producing the optical connection structure of the present invention. FIG. 13 is a plan view showing a method for producing an optical connection structure of the present invention. FIG. 14 is a plan view showing a method for producing the optical connection structure of the present invention. FIG. 15 is a plan view showing a method for producing the optical connection structure of the present invention. FIG. 16 is a plan view showing a method for producing an optical connection structure of the present invention. FIG. 17 is a plan view showing an optical connection structure in the embodiment. FIG. 18 is a plan view showing an optical connection structure in the embodiment. FIG. 19 is a plan view showing an optical connection structure in the embodiment. FIG. 20 is a plan view showing an optical connection structure in the embodiment. FIG. 21 is a plan view showing an optical connection structure in the embodiment. FIG. 22 is a plan view showing an optical connection structure in the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 1st optical fiber 2,22 2nd optical fiber 3 1st plug 4 2nd plug 5 Adapter 6 Optical fiber fixing | fixed part 7 Mounting hole 8 Pin-shaped introduction member 9 Latch 10 Alignment groove 11 Latch engagement Part 12 Laser module 14 Press fixing member 15 Engaging member 16 Plug mounting part 17 Press fixing member mounting part 18 Fiber bending member 31 Window part 32 Projection part

Claims (16)

An optical connection structure for optically connecting the tips of the first and second optical fibers to each other in the alignment groove on an adapter having an alignment groove having an open upper surface,
A pin-shaped introduction member is held by the plug attached to the adapter,
Inserting the first optical fiber through the plug;
While bending the distal end side of the first optical fiber as a bent portion in the plug,
Fixing a rear portion of the first optical fiber from the bent portion to the plug;
After installing the second optical fiber in the alignment groove, the plug is attached to the adapter;
While pressing the tip ends of the first and second optical fibers from the vertical direction with the pin-like introduction member to closely support the alignment grooves,
Extending the bent portion of the first optical fiber;
An optical connection structure characterized in that the tip of the first optical fiber is butted against the tip of the second optical fiber. An optical connection structure for optically connecting the tips of the first and second optical fibers to each other in the alignment groove on an adapter having an alignment groove having an open upper surface,
Pin-like introduction members are held by the first and second plugs attached to the adapter,
Inserting the first and second optical fibers into the first and second plugs, respectively;
While bending the distal end side of the first optical fiber as a bent portion in the plug,
Fixing a rear portion of the first optical fiber from the bent portion to the plug;
Attaching the first and second plugs to the adapter;
While pressing the tip ends of the first and second optical fibers from the vertical direction with the pin-like introduction member to closely support the alignment grooves,
Extending the bent portion of the first optical fiber;
An optical connection structure characterized in that the tip of the first optical fiber is butted against the tip of the second optical fiber. An optical connection structure for optically connecting the tip of the first optical fiber and the optical joint surface of the optical component to each other on an adapter having an alignment groove having an open upper surface,
A pin-shaped introduction member is held by the plug attached to the adapter,
Inserting the first optical fiber through the plug;
While bending the distal end side of the first optical fiber as a bent portion in the plug,
Fixing a rear portion of the first optical fiber from the bent portion to the plug;
Align the optical component with the alignment groove of the adapter and place it on the adapter,
Attach the plug to the adapter,
While pressing the tip of the first optical fiber from the vertical direction with the pin-shaped introduction member to closely support the alignment groove,
Extending the bent portion of the first optical fiber;
An optical connection structure characterized in that the tip of the first optical fiber is butted against an optical joint surface of an optical component.   The plug has a bent cell portion as a space for accommodating the bent portion of the first optical fiber, and an optical fiber fixing portion for fixing a rear portion from the bent portion of the first optical fiber at one end portion. The optical connection structure according to claim 1, wherein the optical connection structure is provided.   5. The fiber bending member that presses the first optical fiber to form the bent portion while opening the bent portion, and is detachably attached to the plug. The optical connection structure according to any one of the above.   The optical connection structure according to any one of claims 1 to 5, wherein the pin-shaped introduction member is held by an attachment hole or an attachment groove of the plug.   The optical connection structure according to claim 1, wherein a pressing fixing member that presses the pin-shaped introduction member from a vertical direction is attached to the adapter.   The optical connection structure according to any one of claims 1 to 7, wherein the pin-shaped introduction member has a columnar shape or a polygonal shape.   The optical connection structure according to claim 1, wherein the plug is attached and detached in a direction perpendicular to an upper surface of the adapter.   The optical connection structure according to claim 1, wherein the plug and / or the pressing fixing member is fixed to the adapter by an engaging member. A method for producing an optical connection structure in which a first optical fiber and a second optical fiber are optically connected to each other in an alignment groove on an adapter having an alignment groove having an open upper surface,
An attachment step of attaching a pin-shaped introduction member to a plug attached to the adapter;
The first optical fiber is inserted into the plug, and the distal end side of the first optical fiber is bent in the plug to form a bent portion, while the rear of the bent portion of the first optical fiber is plugged. A bending process of fixing to
An optical fiber installation step of installing a second optical fiber in the alignment groove;
A mounting step of mounting the plug on the adapter;
An optical fiber contact support step of pressing the tip ends of the first and second optical fibers from the vertical direction with the pin-shaped introduction member to closely support the alignment grooves;
A method for producing an optical connection structure, comprising: a connecting step of extending the bent portion, moving the tip of the first optical fiber, butting it with the tip of the second optical fiber, and optically connecting them. A method for producing an optical connection structure in which a first optical fiber and a second optical fiber are optically connected to each other in an alignment groove on an adapter having an alignment groove having an open upper surface,
An attachment step of attaching a pin-shaped introduction member to the first and second plugs to be attached to the adapter, and inserting the first and second optical fibers into the first and second plugs;
A bending step of bending the distal end side of the first optical fiber in the plug to form a bent portion, and fixing the rear of the bent portion of the first optical fiber to the plug; and the first and second A mounting step of mounting the plug on the adapter;
An optical fiber contact support step of pressing the tips of the first and second optical fibers from the vertical direction with the pin-shaped introduction member to support the alignment grooves in close contact with each other;
A method for producing an optical connection structure, comprising: a connecting step of extending the bent portion, moving the tip of the first optical fiber, butting it with the tip of the second optical fiber, and optically connecting them. A method for producing an optical connection structure for optically connecting a tip of a first optical fiber and an optical joint surface of an optical component to each other on an adapter having an alignment groove having an open upper surface,
An attachment step of attaching a pin-shaped introduction member to a plug attached to the adapter;
The first optical fiber is inserted into the plug, and the distal end side of the optical fiber is bent as a bent portion in the plug, while the rear of the bent portion of the first optical fiber is fixed to the plug. Bending process;
An optical component installation step of aligning the optical component with the alignment groove of the adapter and installing the optical component on the adapter;
A mounting step of mounting the plug on the adapter;
An optical fiber contact support step of pressing the tip of the first optical fiber from the vertical direction with the pin-shaped introduction member to closely support the alignment groove;
And a connecting step of extending the bent portion of the first optical fiber and connecting the tip of the first optical fiber to an optical joint surface of an optical component. .   The method for producing an optical connection structure according to claim 11, wherein the bending step forms a bent portion by pressing an optical fiber with a fiber bending member.   12. The optical fiber contact support step includes a step of attaching a pressing and fixing member to the adapter, and the pin-shaped introduction member pressed by the pressing and fixing member presses the optical fiber. 14. A method for producing an optical connection structure according to any one of items 14 to 14. The method for producing an optical connection structure according to claim 11, wherein in the mounting step, the plug is detachably mounted in an intersecting direction with respect to the upper surface of the adapter.

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