JP4825861B2 - Optical functional module - Google Patents

Description

  The present invention relates to an optical functional component module in which an optical functional component to which an optical fiber is connected, such as an optical splitter used in a network constructed of optical fibers, is built in a casing.

  With the recent expansion of Internet users and the spread of broadband applications such as videophones and video distribution, communication networks using optical fibers are also used for access networks. A network constructed with optical fibers, that is, an optical line network, is widely used for constructing an optical line network of a PON (Passive Optical Network) type from the viewpoint that it can be economically constructed.

  When constructing a PON type optical line network, it is necessary to install an optical splitter in the middle of the path in order to distribute and integrate communication light.

  FIG. 6 is an explanatory diagram showing the installation position of the optical splitter in the conventional access network. In FIG. 6, reference numeral 30 denotes a communication carrier building, 31 a user building, 32 a user's house, 33 a premises optical cabinet, 34 an aerial light closure, 35 a hand hole, 36 a CC box, and 37 a manhole. .

  As shown in FIG. 6, from the OSU of the OLT (Optical Line Terminal) in the carrier's building 30 through the IDM (Integrated Distribution Module) through the underground manhole 37, CC box 36, and hand hole 35, the user's Wiring is performed from the on-site optical cabinet 33 of the building 31 to an ONU (Optical Network Unit). Further, the OLT OSU in the communication company building 30 is wired to the ONU of the user home 32 through the aerial optical closure 34 via the IDM.

  The optical splitter is installed in the telecommunications carrier's building 30 if it is in the office, and is installed in the aerial optical closure 34, the premises cabinet 33, and the like.

  Currently used optical splitters are generally PLC (Planar Lightwave Circuits) type optical splitters, which have superior optical characteristics and reliability compared to, for example, fiber fusion type optical splitters, and can be manufactured in a smaller size. Since it is possible, it is widely used commercially.

  FIG. 7 is an external view showing a general PLC type optical splitter (8 branches). As shown in FIG. 7, an input-side single-core wire 39 made of a normal SM optical fiber is formed from one end of a main body portion 38 in which a main body PLC is incorporated in a rectangular parallelepiped housing having a width of 4 mm, a height of 4 mm, and a length of 40 mm. In addition, an output side 4-core tape core 40 made of a normal SM optical fiber is led out from the other end of the main body 38 and configured.

  Especially for an optical splitter installed outdoors, an optical splitter may be installed together with service provision, and a single PLC type optical splitter is often used. As a form for installing this PLC type optical splitter, it is often stored and used in an aerial light closure or a tray that can be stored in a premise cabinet in the current lifting operation.

  This tray is generally [1] a part for fixing the above rectangular parallelepiped casing of the PLC type optical splitter, and [2] a bending radius (for example, a bending radius of 30 mm) where the extra length of the input and output optical fiber cores is constant. ) It consists of a part that guides and protects the core wire so that it does not become below, and [3] a part that fixes a fusion sleeve used for optical connection with other optical cables and a mechanical splice.

  However, in order to improve workability in field work, a shape in which the tray and the PLC type optical splitter are integrated has begun to be used. Specifically, it is a housing in which a PLC-type optical splitter is housed inside from the stage of shipping and shipping, and at least the above [1] and [2] are provided.

  FIGS. 8A, 8B, 8C, and 8D are configuration explanatory views showing an existing splitter module. As shown in FIG. 8A, the housing 41 of the splitter module is provided with a re-stable type optical connector 42 as an interface related to light input (one input), and relates to light output (eight outputs). As an interface, a re-sectorable optical connector 43 is provided.

  Further, as shown in FIG. 8B, the housing 44 of the splitter module is provided with a re-stable type optical connector 42 as an interface related to light input (one input), and outputs light (eight outputs). As an interface, there is an output side code type in which an optical fiber portion outside the housing is optically coded, and further an optical connector 45 is provided at the end of the output cord.

  Further, as shown in FIG. 8C, the optical fiber portion outside the housing is optically encoded as an interface for light input (one input) in the splitter module housing 46, and further, light is input to the input cord end. An input side cord type provided with a connector 47. As an interface related to light output (8 outputs), an optical fiber portion outside the housing is optically coded, and further an output side cord type provided with an optical connector 45 at the end of the output cord. There is.

  Also, as shown in FIG. 8D, the optical fiber portion outside the housing is optically encoded as an interface for light input (1 input) in the splitter module housing 48, and further, light is input to the input cord end. The input side cord type provided with the connector 47 is provided with a re-sectorable type optical connector 43 as an interface for light output (eight outputs).

  Hereinafter, the entire shape including the optical connector is referred to as a “splitter module”, and the casing in which the PLC type optical splitter is stored is referred to as a “splitter module casing”.

  FIG. 9 is a configuration explanatory view showing an example of an existing splitter module. As shown in FIG. 9, a PLC type optical splitter 38 housed in a case-like housing is built in the housing 46 of the splitter module. An input-side optical cord 49 is connected to the PLC-type optical splitter 38 and led out to the input side of the splitter module housing 46, and an optical connector 47 is provided at the tip of the input-side optical cord 49. The output side optical cord 50 is connected to the PLC type optical splitter 38 and led out from the output side of the casing 46 of the splitter module, and the optical connector 45 is provided at the tip of the output side optical cord 50.

  The splitter module casing 46, the input side optical cord 49, and the output side optical cord 50 constitute a splitter module.

  FIG. 10 is an explanatory diagram showing the internal structure of a general splitter module housing. As shown in FIG. 10, the splitter module generally includes an optical branching unit such as a PLC type optical splitter 38, an optical connecting unit such as a fusion sleeve 52 and an optical core wire when optically connecting inside. And an optical fiber guide portion 16 for guiding the inner optical fiber so as not to be less than the minimum bending radius R2. A dotted line 51 is an outline when the splitter module is rectangular.

  As described above, the size of the housing of the splitter module depends on the storage method, but particularly in the plane direction (X, Y direction), the bending radius required for storing the optical fiber extra length (normal single mode (SM)) In the case of an optical fiber, the bending radius is limited to 30 mm. In the height direction (Z direction), the thickness (about 5 mm) of the main body of the PLC type optical splitter is a minimum required thickness.

  In the future, with the further increase in FTTH (Fiber To The Home) users, it is necessary for communication carriers to install more optical equipment. Along with this increase in optical equipment, the number of installations increased by reducing the size of the splitter module housing and changing the shape of the splitter module housing in order to efficiently use the limited installation space. Density mounting), which is a subject to be examined.

  Examples of the existing technology include the technology described in the following documents, but the description of the size of the housing of the splitter module and the shape of the housing capable of mounting a plurality of splitter modules with high density are as follows: Not necessarily.

JP 2007-121398 A 2007 IEICE 2007 Society Conference B-10-10

  The present invention has been made in view of the above circumstances, and enables an optical functional component module such as a splitter module to be miniaturized and space-saving, and enables high-density mounting of the optical functional component module. The purpose is to provide.

In order to achieve the above object, the present invention provides an optical functional component module in which an optical functional component to which an optical fiber is connected is incorporated in a casing, and is fitted to the casing of another optical functional component module having the same shape. The housing is configured to have a concavo-convex shape according to the shape of the built-in optical functional component, and a plurality of concavo-convex pairs in which the convex portion can be fitted into the concave portion is provided. The portions are arranged on both sides of the line symmetry axis of the casing, and the thickness dimension of each convex portion is formed substantially the same.

  According to the present invention, in the optical functional component module, two or more optical functional components are built in the housing, and a guide portion is provided in the housing for setting an optical fiber connected to the optical functional component to a predetermined bending radius. The guide portion is shared by a plurality of optical fibers.

  The optical functional component module of the present invention enables downsizing and space saving of the optical functional component module such as a splitter module, enables high-density mounting of the optical functional component module, and increases the number of mounting in a narrow space. It is possible to provide an optical functional component module that can be made to operate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that parts corresponding to the same parts are described with the same reference numerals.
FIG. 1A is a perspective view showing an optical functional component module according to the first embodiment of the present invention, and FIG. 1B is a diagram showing the light inside the optical functional component module according to the first embodiment of the present invention. It is a top view which shows fiber wiring.

  1A and 1B, 11 is an optical functional component module, for example, a housing of a splitter module, 12 is a convex portion of the housing, 13 is an optical fiber housed in the housing, and 14 is a PLC type optical splitter. It is. The casing 11 other than the convex portion 12 is a concave portion. Y1 is the length of the housing at least 70 mm, X1 is the housing width at least 30 mm, Z1 is the thickness of the housing 11 of the convex portion 12 and about 5 mm, and Z2 is a housing other than the convex portion 12 11 is about 3 mm, X2 is a storage width of the optical fiber 13, 30 mm, Y2 is a storage length of the optical fiber 13, and R1 is a minimum bending radius of 15 mm when the optical fiber 13 is stored.

  As shown in FIGS. 1A and 1B, an optical fiber 13 is connected to a PLC type optical splitter 14, which is an example of an optical functional component, and is built in a housing 11. The casing 11 is configured to have an uneven shape according to the shape of the built-in PLC type optical splitter 14 so that the splitter module can be overlaid.

  In FIGS. 1A and 1B, it is assumed that one PLC type optical splitter is housed in the casing 11 of one splitter module. Note that the four types of input / output interfaces shown in FIG. 8 are assumed.

  A step is provided in the thickness direction of the casing 11 of the splitter module. Specifically, with respect to the case 11 of the splitter module in which the PLC type optical splitter is built in, the PLC type optical splitter 14 is installed only in the vicinity where the PLC type optical splitter 14 (about 4 mm × 40 mm in plane size) is stored. The shape is such that it can be covered. That is, the total of the thickness (height) of the PLC type optical splitter 14 and the thickness of the wall of the casing 11 covering the upper and lower sides of the PLC type optical splitter 14 is about 5 mm. As an example of the dimensions of the housing 11, the PLC type optical splitter 14 has a width of about 4 mm and a total length of about 3 mm of 10 mm, and the length (depth) of the PLC type optical splitter 14 is about 40 mm. That is, an area having a size of about 10 mm × 50 mm needs a thickness of at least about 5 mm.

  On the other hand, the portion of the splitter module housing 11 that accommodates the optical fiber other than the PLC type optical splitter 14 has a shape in which the dimension of the splitter module housing 11 is reduced. That is, the total of the width of the optical tape core and the thickness of the wall of the housing 11 covering the top and bottom of the optical tape core is about 2.5 mm. As an example of the storage form, the shape of the core wire of the optical fiber 13 including the PLC type optical splitter 14 is a shape of a track in an athletic field. The bending diameter (minimum bending radius R1) is 15 mm, the width X2 is 30 mm, the depth (length Y2) is 40 mm of the PLC-type optical splitter 14, and the length of two semicircles for securing the bending diameter is 15 mm. It becomes the shape of 70 mm in total of x2. For this reason, the size of the housing 11 needs to be at least 30 mm × 70 mm including the above-mentioned 5 mm thick portion (in actuality, the thickness of the case is included, so it is necessary to add several mm). It becomes.

  Due to the above shape, the casing 11 of the splitter module according to the present embodiment is partly located compared to the conventional casing of the splitter module having a uniform thickness (eg, thickness of about 5 mm). Since the thickness of the housing can be reduced, the volume of the housing can be reduced. This enables high-density mounting on an optical closure or the like.

  2A and 2B are a side view and a plan view showing a first example of the optical functional component module according to the second embodiment of the present invention, and FIGS. 2C and 2D are views of the present invention. The side view and top view which show the 2nd example of the optical functional component module which concerns on 2nd Embodiment, FIG.2 (e), (f) is the 1st of the optical functional component module which concerns on the 2nd Embodiment of this invention. It is the side view and top view which show the example of 3.

  2 (a) to 2 (f), reference numerals 15, 17, and 18 denote optical functional component modules, for example, a housing of a splitter module, and reference numeral 16 denotes an optical core made of an arc that secures a bending radius so as not to be less than the minimum bending radius R2. It is a guide part.

  As shown in FIGS. 2A and 2B, inside the casing 15 of the splitter module, two optical fiber guide parts 16 are provided side by side, and the optical fiber guide parts 16, 16 are provided. Two PLC type optical splitters 14 and 14 are separately provided in the middle portion of the optical fiber guides 16 and 16 so as to sandwich the optical fiber core guide portions 16 and 16 therebetween. The extension lines of the PLC type optical splitters 14 and 14 are provided so as to coincide with the tangent lines on the outer periphery of the optical fiber guides 16 and 16. This is a measure for avoiding buckling of the optical fiber 13 inside the casing 15 of the splitter module.

  The optical fiber guides 16 and 16 guide the extra length portions of the input and output optical fibers 13 and 13 connected to the two PLC type optical splitters 14 and 14, respectively. A plurality of optical fibers 13 and 13 are shared.

  The shape of the splitter module casing 15 is such that a portion corresponding to the PLC type optical splitter 14, 14 is formed as a convex portion with an increased thickness, and the other portion is formed as a concave portion with a reduced thickness.

  2 (c) and 2 (d), two optical fiber guides 16 and 16 are provided side by side inside the housing 17 of the splitter module, and the optical fiber guides 16 and 16 are arranged side by side. Two PLC-type optical splitters 14 and 14 are provided in the middle portion of 16 so as to be in contact with the optical fiber guide portions 16 and 16 in parallel. The extension lines of the PLC type optical splitters 14 and 14 are provided so as to coincide with the tangent lines on the outer periphery of the optical fiber guides 16 and 16.

  The optical fiber guides 16 and 16 guide the extra length portions of the input and output optical fibers 13 and 13 connected to the two PLC type optical splitters 14 and 14, respectively. A plurality of optical fibers 13 and 13 are shared.

  As for the shape of the casing 17 of the splitter module, a part corresponding to the PLC type optical splitters 14 and 14 is formed as a convex part with an increased thickness, and the other part is formed as a concave part with a reduced thickness.

  For example, two types of PLC-type light can be obtained using an optical fiber of a type that can be made to have a bending radius of 15 mm and a size equivalent to that of an existing splitter module (122 mm × 94 mm: see Non-Patent Document 1). It is possible to incorporate a splitter.

  As shown in FIGS. 2 (e) and 2 (f), four optical fiber guide parts 16, 16, 16, 16 are located in the corners of the square inside the casing 18 of the splitter module. And four PLC type optical splitters 14, 14, 14, 14 are provided outside the intermediate portion of the optical fiber guides 16, 16, 16, 16. , 16 so as to be in contact with each other and distributed evenly every 90 degrees. An extension line of each of the PLC type optical splitters 14, 14, 14, 14 is provided so as to coincide with a tangent line on the outer periphery of the optical fiber guide parts 16, 16, 16, 16.

  The optical fiber guide sections 16, 16, 16, 16 have extra length portions of input / output optical fibers 13, 13, 13, 13 connected to four PLC type optical splitters 14, 14, 14, 14, respectively. The optical fiber guides 16, 16, 16, 16 are guided and shared by the plurality of optical fibers 13, 13, 13, 13.

  The shape of the casing 18 of the splitter module is such that a portion corresponding to the PLC type optical splitter 14, 14, 14, 14 is formed as a convex portion with an increased thickness, and the other portion is formed as a concave portion with a reduced thickness. .

  That is, a plurality of PLC type optical splitters are housed in a casing of one splitter module. Note that the four types of input / output interfaces shown in FIG. 8 are assumed.

  This shape increases the volume of each splitter module housing. However, when compared with the total volume of a plurality of splitter module housings (with one PLC-type optical splitter), The volume can be reduced.

  FIG. 3 is a perspective view showing an optical functional component module according to the third embodiment of the present invention. In FIG. 3, reference numeral 19 denotes an optical functional component module such as a splitter module housing, and reference numeral 20 denotes a convex portion of the housing 19.

  As shown in FIG. 3, an optical functional component to which the optical fiber 13 is connected, for example, a PLC type optical splitter 14 is built in a casing 20 of the splitter module. The casing 20 is configured in such a shape that there is a step in uneven thickness depending on the shape of the built-in PLC type optical splitter 14 so that the splitter module can be overlaid. In other words, the casing 20 portion of the splitter module corresponding to the portion where the PLC type optical splitter 14 exists is formed as a convex portion, and the other portion of the casing 20 of the splitter module is formed as a concave portion. In this case, the thickness of the convex portion of the housing 20 is formed approximately twice the thickness of the concave portion of the housing 20.

  For example, it is assumed that a plurality of splitter modules are stored in a certain space (eg, aerial light closure). In the case where the thickness of the casing 20 of the splitter module has a step, the casings 20 of the plurality of splitter modules can be alternately superposed to form a shape with few irregularities, for example, a rectangular parallelepiped. Note that the four types of input / output interfaces shown in FIG. 8 are assumed.

  Specifically, the thickness (about 2.5 mm) of the splitter module housing 20 at the recessed portion accommodating the optical fiber 13 is set to the thickness of the splitter module housing at the convex portion accommodating the PLC type optical splitter 14. By making the thickness of the body 20 half (Z1 = about 5 mm minimum), the two splitter modules can be alternately stacked and handled as a uniform rectangular parallelepiped.

  As an example, the dimension of the housing 20 of the splitter module is such that the concave portion with a thickness of 2.5 mm includes at least 30 mm × 70 mm including the convex portion with a thickness of 5 mm (X1 = minimum 30 mm). As described above, Y1 = 70 mm or more is necessary, and since the thickness of the case is actually included, it is necessary to add several mm). On the other hand, the convex portion having a thickness of 5.0 mm covers the width of the PLC-type optical splitter 14 with a thickness of 5.0 mm when the two splitter modules are overlapped in the form as shown in FIG. Since it is necessary, a length of X3 = 10 mm or more is required. On the other hand, at least Y1 = 70 mm or more is required for the depth (length). Therefore, a shape having a size of 10 mm × 70 mm is an example.

  As in this embodiment, housing the plurality of splitter modules in a combination of steps makes it possible to eliminate a so-called dead space and store the plurality of splitter modules with higher density.

  FIGS. 4A and 4B are configuration explanatory views showing an optical functional component module according to the fourth embodiment of the present invention. In FIGS. 4A and 4B, reference numerals 21 and 22 denote optical functional component modules, for example, a housing of a splitter module.

  As shown in FIG. 4A, an optical functional component in which an optical fiber 13 is connected to a casing 21 of a splitter module having a guide portion of R2 = 30 mm as an optical fiber guide portion, for example, a PLC type optical splitter 14 is accommodated. In this case, the width of the casing 21 of the splitter module is X4 = 60 mm, the length of the PLC type optical splitter 14 is Y3 = 40 mm, and the length of the casing 21 of the splitter module is Y4 = 100 mm.

  On the other hand, as shown in FIG. 4B, an optical functional component such as a PLC type optical splitter 14 in which an optical fiber 13 is connected to a casing 22 of a splitter module having a guide portion of R1 = 15 mm as an optical fiber guide portion. When accommodated, the width of the casing 22 of the splitter module is X2 = 30 mm, the length of the PLC type optical splitter 14 is Y3 = 40 mm, and the length of the casing 22 of the splitter module is Y2 = 70 mm.

  That is, the type of the optical fiber 13 used for the input and output optical cores of the PLC type optical splitter 14 is accommodated from a single mode fiber (minimum bending radius 30 mm) as shown in FIG. Even so, the optical fiber is changed to a type that does not cause excessive loss. Specifically, as shown in FIG. 4B, an optical fiber having a smaller mode field diameter (for example, an optical fiber having a minimum bending radius of 15 mm), HAF (Hole-Assisted Fiber), PCF (Photonic Crystal Fiber), or the like. By using (minimum bending radius 5 to 10 mm), the bending radius is reduced.

  As a result, the minimum bending radius can be reduced, the bending radius of the optical fiber guide portion that secures the minimum bending radius inside can be reduced, and the required area can be reduced. As a result, the size in the plane direction (x, y direction) of the housing of the splitter module can be reduced. In this case, the four types of input / output interfaces shown in FIG. 8 are assumed.

  For example, assembling the configuration shown in FIG. 4, by changing from an optical fiber with a normal bending radius of 30 mm to an optical fiber with a bending radius of 15 mm, the module calculated from the optical fiber wiring, excluding the case thickness, etc. The area of the plane is reduced from 6000 square millimeters (100 mm × 60 mm) to 2100 square millimeters (70 mm × 30 mm), which is reduced to 35%.

  5A and 5B are a plan view and a side view showing an optical functional component module according to the fifth embodiment of the present invention. In FIGS. 5A and 5B, reference numeral 23 denotes an optical functional component module, for example, a splitter module housing, 24 denotes an axis of line symmetry of the splitter module housing 23, 25 denotes an optical core guide portion of R1 = 15 mm, and O1. Is the first recess of the splitter module casing 23, O2 is the second recess of the splitter module casing 23, T1 is the first protrusion of the splitter module casing 23, and T2 is the splitter module casing 23. It is the 2nd convex part.

  As shown in FIGS. 5A and 5B, the housing 23 of the splitter module incorporates an optical functional component to which the optical fiber 13 is connected, for example, a PLC type optical splitter 14. A portion of the housing 23 where the PLC type optical splitter 14 is disposed is formed on the first convex portion T1. Note that a fusion sleeve or the like may be built in the casing 23 of the splitter module.

A first concave portion O1 formed of a hollow portion having a dimension capable of fitting the first convex portion T1 is provided in a portion of the casing 23 which is symmetric with respect to the PLC type optical splitter 14 and the line symmetry axis 24. A cylindrical second convex portion T2 and a second convex portion T2 are fitted to the casing 23 between the first convex portion T1 and the first concave portion O1 at symmetrical positions with the line symmetry axis 24 in between. A circular second recess O2 having possible dimensions is formed in pairs. Two pairs of the second convex portion T2 and the second concave portion O2 are arranged side by side.

  The first convex portion T1 and the second convex portion T2 are disposed on both sides of the line symmetry axis 24, and the thickness dimensions of the convex portions T1 and T2 are substantially the same (eg, 5.0 mm). The thickness of the other part of the housing 23 is made constant (an example is 2.5 mm, except for the recesses). Further, even on a smooth surface with the surface on the convex portion T1, T2 side of the housing 23 facing down, the convex portions T1, T2 are arranged at even positions so that the housing 23 does not shake. Place on top.

  That is, when the shape of the surface of the casing 23 of the splitter module is uneven, the two splitter modules are overlapped to be a shape that can be handled as a solid with little unevenness. Note that the four types of input / output interfaces shown in FIG. 8 are assumed.

By taking the shape of the splitter module housing in this way, it becomes possible to fit two identically shaped splitter module housings together. Further, even when the convex portion side of the single splitter module casing is placed downward (toward a smooth plane), the splitter module casing can be disposed without shaking. Thereby, the freedom degree of the installation form in an aerial light closure etc. spreads.

  As described above, according to the embodiment of the present invention, the splitter module can be miniaturized and can be installed in a narrow space in an apartment building. In addition, it is possible to increase the number of mountings in a limited space in the aerial light closure.

  Also, by increasing the thickness of only the PLC type optical splitter casing of the splitter module casing, the volume of the splitter module casing can be reduced compared to a conventional splitter module having a uniform thickness. Can be realized.

  In addition, by incorporating a plurality of PLC type optical splitters in a single splitter module casing, the optical splitter can be compared with a case where only one PLC type optical splitter is built in a single splitter module casing. Since it is possible to reduce the volume of the casing of the splitter module required per one, it is possible to contribute to the downsizing and high density of the splitter module as a result.

  Furthermore, by combining the housings of a plurality of splitter modules and forming a shape that eliminates dead space throughout the plurality of modules, it is possible to increase the density of the housings of the splitter modules.

  In addition, by using an optical fiber that is resistant to bending as the input / output optical fiber of the PLC type optical splitter inside the splitter module housing, the shape of the splitter module housing can be made smaller than the conventional shape (the splitter module The size of the casing in the planar direction can be reduced).

In addition, the two identically-shaped splitter module cases can be fitted to each other. Further, even when the convex portion side of the single splitter module casing is placed downward (toward a smooth plane), the splitter module casing can be disposed without shaking. Furthermore, if the splitter module housing is the same as the existing splitter module housing, the splitter module housing can be installed on the existing tray by placing both the front and back surfaces of the splitter module. Can be achieved.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

(A) is a perspective view which shows the optical functional component module which concerns on the 1st Embodiment of this invention, (b) shows the optical fiber wiring inside the optical functional component module which concerns on the 1st Embodiment of this invention. It is a top view. (A)-(f) is the side view and top view which show the optical functional component module which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the optical functional component module which concerns on the 3rd Embodiment of this invention. It is a structure explanatory view showing an optical functional component module concerning a 4th embodiment of the present invention. (A), (b) is the top view and side view which show the optical functional component module which concerns on the 5th Embodiment of this invention. It is structure explanatory drawing which shows the installation position of the optical splitter in the conventional access network. It is an external view which shows a general PLC type | mold optical splitter (8 branches). It is a structure explanatory view showing an existing splitter module. It is a structure explanatory view showing an example of an existing splitter module. It is a block diagram showing the internal structure of a general splitter module housing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Optical functional component module, for example, the housing | casing of a splitter module, 12 ... The convex part of a housing | casing, 13 ... Optical fiber accommodated in the inside of a housing | casing, 14 ... PLC type | mold optical splitter.

Claims (2)

An optical functional component module in which an optical functional component to which an optical fiber is connected is built in a housing,
In order to be able to fit together with the housing of another optical functional component module having the same shape, the housing is configured to have an uneven shape according to the shape of the optical functional component incorporated therein, and the convex portion is formed into a concave portion. An optical functional component characterized in that a plurality of pairs of concaves and convexes that can be fitted are provided, each convex part is arranged on both sides of the line symmetry axis of the housing, and the thickness dimension of each convex part is formed substantially the same. module. The housing the optical functional part is built two or more, the guide portion for the optical fiber connected to the optical functional part in a predetermined bending radius is provided in the casing, sharing the guide portion by a plurality of optical fibers The optical functional component module according to claim 1 .

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