JP2003248145A - Optical transmitting / receiving module and manufacturing method thereof - Google Patents

Abstract

(57) [Summary] [PROBLEMS] An optical fiber is securely fixed when a narrow groove is formed, and a cut surface of the optical fiber is formed as a smooth surface to prevent irregular reflection of an optical signal. SOLUTION: An insertion hole 2 is formed so as to penetrate in the axial direction of a holding substrate 1, and an optical fiber 3 inserted into the insertion hole 2 has a substantially U-shaped cross section so that a part of the peripheral surface is exposed. A bottomed window 4 is formed in the holding substrate 1, and the bottom surface 4 a of the window 4 is positioned closer to the opening of the window 4 than the midpoint P of the optical fibers 3. Is formed. The narrow groove 6 is formed so as to cross the axial direction of the holding substrate 1 so as to cut the end of the optical fiber 3 in the insertion hole 2, and the optical filter 7 is inserted into the small groove 6. The cut ends of the optical fibers 3 and 3 are abutted to each other via an optical filter 7 to split the light, so that the optical fibers 3 and 3 can be optically coupled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a communication device that connects a telephone station from a home with a single optical fiber using a media converter, and particularly to an optical transceiver module using a holding substrate such as an optical branching device or an optical demultiplexer for cost reduction and characteristic deterioration prevention. .

[0002]

2. Description of the Related Art In recent years, for example, a communication system has become widespread in which an optical fiber is wired between a telephone station and a general household to enable bidirectional high speed communication. In such a communication system, in order to enable bidirectional communication with a single optical fiber, signals of different wavelengths are multiplexed and sent to the optical fiber, and each wavelength is transmitted by an optical transceiver module installed in a station or home. Each signal is converted into an electrical signal, and the optical transceiver module is equipped with, for example, a filter so as to traverse the optical fiber. This filter reflects or refracts one of the signals with different wavelengths and transmits the other signal. By doing so, signals having different wavelengths are separated.

As an optical transceiver module of this type, a flat glass block (glass substrate) a as shown in FIG. 9 is used.
V-groove b so as to extend in the axial direction at (see FIG. 10)
Alternatively, a rectangular groove c (see FIG. 11) is formed, an optical fiber d is inserted into the V groove b or the rectangular groove c, and fixed with an adhesive, and then shown by a broken line in FIG. 10 or 11. Such a small width groove e for cutting the optical fiber d is provided, and a filter (not shown) is inserted into the small width groove e.

[0004]

In the conventional optical transmission / reception module constructed as described above, the optical fiber d is V
Even if it is inserted in the groove b or the rectangular groove c and fixed by an adhesive, the optical fiber d is formed when the narrow groove e is formed.
May cause a floating phenomenon due to the forming pressure of the narrow groove, and as a result, the ground surface of the optical fiber d may be rough. However, since it is extremely difficult to grind the roughened cut surface after that, there is a problem that the optical signal causes irregular reflection.

Therefore, according to the present invention, when the narrow groove is formed, the optical fiber is surely fixed, and the ground surface of the optical fiber is formed into a smooth surface to prevent irregular reflection of the optical signal. It is intended to provide a module.

[0006]

In order to achieve the above object, the present invention provides an insertion pore formed in a holding substrate so as to penetrate in the axial direction of the holding substrate, and a pair of insertion pores inserted into the insertion pore. The bottomed window portion formed on the holding substrate so that a part of the peripheral surface of the optical fiber is exposed, and the bottom surface of the window portion are formed closer to the opening side of the window portion than the axis of the optical fiber, thereby supporting the optical fiber. It has a holding part and a narrow groove formed in the holding substrate so as to intersect with the holding substrate in the axial direction, and an optical filter is inserted into the narrow groove and the end faces of the optical fibers are butted to each other through the optical filter. It is characterized in that an optical fiber is formed so that it can be optically coupled by branching the optical fiber.

According to the present invention, even if a part of the peripheral surface of the optical fiber is exposed from the holding substrate due to the formation of the window, the bottom surface of the window is located closer to the opening side of the window than the midpoint of the optical fiber. Since the holding portion for holding the optical fiber is formed, even if the narrow groove is formed on the holding substrate while the optical fiber is inserted into the insertion hole, the rising pressure of the optical fiber is caused by the forming pressure of the narrow groove. It is possible to form a smooth end face without causing the occurrence of irregular reflection of the optical signal. In addition, the optical fiber can be ground on the ground surface by allowing the optical fiber to be inserted and removed from the insertion hole after the grounding, so that the irregular reflection of the optical signal can be surely prevented. Then, when the optical fiber is returned into the insertion hole again, it is preferable to fix the optical fiber and the holding substrate with an adhesive.

Further, according to the present invention, the insertion hole formed in the holding substrate so as to penetrate in the axial direction of the holding substrate and a part of the peripheral surfaces of the pair of optical fibers to be inserted into the insertion hole are exposed. A bottomed window portion formed on the holding substrate, a holding portion that holds the optical fiber by forming the bottom portion of the window portion on the opening side of the window portion with respect to the optical fiber axis line, and the holding substrate axial direction It has a small width groove formed on the holding substrate so as to intersect with the optical fiber, and the optical fiber can be optically coupled by inserting the optical filter into the small width groove and abutting the end faces of the optical fiber through the half mirror to branch the light. It is characterized in that it is formed.

Also according to the present invention, even if a part of the peripheral surface of the optical fiber is exposed from the holding substrate due to the formation of the window, the bottom surface of the window is located closer to the opening side of the window than the midpoint of the optical fiber. Since the holding portion for holding the optical fiber is formed, even if the narrow groove is formed on the holding substrate while the optical fiber is inserted into the insertion hole, the floating pressure of the optical fiber is caused by the forming pressure of the narrow groove. It is possible to form a smooth end face without causing the occurrence of irregular reflection of the optical signal. Further, the optical fiber can be ground at the end face by allowing the optical fiber to be inserted into and removed from the insertion hole after forming the narrow groove, and thus, the irregular reflection of the optical signal can be surely prevented. Then, when the optical fiber is returned into the insertion hole again, it is preferable to fix the optical fiber and the holding substrate with an adhesive.

Further, according to the present invention, there are provided insertion pores formed in the holding substrate so as to penetrate in the axial direction of the holding substrate, and narrow grooves formed in the holding substrate so as to intersect in the axial direction of the holding substrate. The optical fiber is formed so that the optical fiber can be optically coupled by inserting the optical filter into the narrow groove and causing the end faces of the optical fiber to abut against each other through the optical filter to branch the light.

According to the present invention, since the window is abolished and the periphery of the optical fiber is fixedly held by the insertion pores when the narrow groove is formed on the holding substrate, the narrow groove of the narrow groove is formed during grinding. Without causing the floating phenomenon due to the forming pressure,
A smooth ground surface can be formed, and the optical signal does not cause irregular reflection. In addition, the optical fiber can be ground on the ground surface by allowing the optical fiber to be inserted and removed from the insertion hole after the grounding, so that the irregular reflection of the optical signal can be surely prevented. Then, when the optical fiber is returned to the inside of the insertion hole again, it is preferable to fix the optical fiber and the holding substrate with an adhesive. Further, if a transparent glass substrate is used as the holding substrate and the holding substrate itself is configured to be light-transmissive, even if the window portion is eliminated, the holding substrate will not be used for optical signal propagation.

Further, according to the present invention, there is provided an insertion hole formed in the holding substrate so as to penetrate in the axial direction of the holding substrate, and a narrow groove formed in the holding substrate, and the optical filter is inserted in the narrow groove. Then, the half mirrors are formed so that they can be optically coupled by abutting the end faces of the optical fibers through an optical filter and branching them.

Also according to the present invention, when the narrow groove is formed on the holding substrate, the periphery of the optical fiber is fixed and held by the insertion pores, so that a lifting phenomenon occurs due to the forming pressure of the narrow groove during grinding. Without doing so, a smooth ground surface can be formed, and the optical signal does not cause irregular reflection. In addition, the optical fiber can be ground on the ground surface by allowing the optical fiber to be inserted and removed from the insertion hole after the grounding, so that the irregular reflection of the optical signal can be surely prevented. Then, when the optical fiber is returned to the inside of the insertion hole again, it is preferable to fix the optical fiber and the holding substrate with an adhesive.

Further, according to the present invention, if a transparent glass substrate is used as the holding substrate and the holding substrate itself is configured to be light-transmissive, even if the window is eliminated and the holding substrate is large, it can be used for optical signal propagation of the holding substrate. Don't come

Further, according to the present invention, a light receiving element capable of receiving the optical signal demultiplexed by the optical filter or the optical signal branched by the half mirror can be attached to the window portion.

Therefore, according to the present invention, since the light receiving element is attached to the window provided on the holding substrate, it is possible to take out a specific signal among the signals having different wavelengths propagating in the optical fiber.

Further, according to the present invention, the light emitting element or the light receiving element can be mounted on one end of the holding substrate.

Therefore, at one end of the holding substrate,
It becomes possible to send a signal to the outside by the light emitting element or to configure an optical branching device by the light receiving element.

Further, the present invention can be used by mounting the holding substrate on the printed circuit board.

Further, according to the present invention, the first step of forming a bottomed window portion on the holding substrate so as to open the insertion pores penetrating along the axial direction of the holding substrate, and the bottom surface of the window portion. The second step of forming a small groove on the holding substrate that intersects the insertion hole in the axial direction, and inserting a pair of optical fibers into the insertion hole and abutting the end faces of the optical fibers in the small groove. The third step is to insert an optical filter for branching the optical fiber or a half mirror for abutting the end faces of the optical fiber to branch the optical fiber so that the optical fiber can be optically coupled. The optical fiber is held by a holding portion formed when the bottom surface of the window portion is positioned closer to the opening side of the window than the axis of the optical fiber when inserted. Optical transceiver module by the holding board, since it is formed in the holding board narrow groove intersecting the insertion pores prior to inserting the optical fiber insertion pores, thereby preventing the uplift phenomenon as in the prior art optical fiber. Also,
Since the optical fiber is inserted into the insertion hole of the holding substrate after the narrow groove is formed, the end surface of the optical fiber can be formed into a precise smooth surface by grinding in advance, and the optical signal will cause irregular reflection after optical coupling. There is no. Further, after inserting the optical fiber into the insertion hole again, it is preferable to fix the optical fiber to the holding substrate in the insertion hole with an adhesive.

Further, according to the present invention, the first step of inserting the optical fiber into the insertion hole penetrating along the axial direction of the holding substrate, and a part of the peripheral surface of the optical fiber is exposed on the holding substrate. A window part having a substantially U-shaped cross-section is formed, and a bottom surface of the window part is located closer to an opening side of the window part than a midpoint of the optical fiber and forms a holding part for holding the optical fiber. And a third step of forming a narrow groove in the holding substrate so as to intersect the holding substrate in the axial direction so as to cut an optical fiber in the insertion hole on the bottom surface of the window portion, Inserting an optical filter for abutting the abraded end faces of the optical fibers to branch the light into the narrow groove or a half mirror for abutting the abutted end faces of the optical fibers for the optical branch to form an optical fiber capable of optical coupling In the optical transmitter-receiver module using the holding substrate obtained by the manufacturing method having the step of, the bottom surface of the window portion has the axis of the optical fiber even if a part of the optical fiber peripheral surface is exposed from the holding substrate due to the formation of the window portion. Since the holding portion for holding the optical fiber is formed closer to the opening side of the window than the window, even if the narrow groove is formed on the holding substrate while the optical fiber is inserted into the insertion hole, the small width is small. It is possible to form a smooth abraded surface on the end face side of the optical fiber without causing the floating phenomenon of the optical fiber due to the forming pressure of the groove, and to prevent irregular reflection of the optical signal. Further, the optical fiber can be ground at the end face by allowing the optical fiber to be inserted into and removed from the insertion hole after forming the narrow groove, and thus, the irregular reflection of the optical signal can be surely prevented. Then, when the optical fiber is returned to the inside of the insertion hole again, it is preferable to fix the optical fiber and the holding substrate with an adhesive.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an optical transceiver module using a holding substrate according to the present invention will be described below with reference to the drawings.

FIG. 1 is a horizontal cross-sectional view depicting an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of the same. The holding substrate 1 has insertion pores penetrating in the axial direction thereof. 2 (center hole) is formed.

A pair of bare optical fibers 3, 3 from which the covering material 3a has been peeled off is inserted and inserted into the insertion hole 2 so that the optical fibers 3, 3 can be inserted and removed, and the end faces of the optical fibers 3, 3 are butted against each other.

Further, a U-shaped window portion 4 opening upward is formed in the central upper portion of the holding substrate 1 so as to expose a part of the upper peripheral surfaces of the optical fibers 3 and 3,
The bottom surface 4a of the window portion 4 is located closer to the opening side of the window portion 4 than the axis S of the optical fibers 3 and 3, and a holding portion 5 that holds the optical fibers 3 and 3 is formed.

Further, on the bottom surface 4a of the window portion 4, the insertion hole 2 is formed.
A narrow groove 6 is formed so as to intersect the holding substrate 1 in the axial direction.

The narrow groove 6 is formed so as to be inclined with respect to the axis of the holding substrate 1, and the inclination angle is preferably about 60 ° to match the inclination angle of the optical filter described later.

The end faces of the optical fibers 3 and 3 have insertion holes 2
Before or after the insertion, the optical fibers 3 and 3 may be once removed from the insertion pores 2 and then ground. After that, if the optical fibers 3 and 3 are inserted into the insertion hole 2, they are accurately guided by the ultra-precision formed insertion hole 2, and the optical axes of both end faces can be aligned.

When the optical fibers 3 and 3 are mounted on the holding substrate 1, an optical filter 7 is interposed between the end faces of the optical fibers 3 and 3 as shown in FIG. Are abutted through the optical filter 7 to cause optical branching, and the optical fibers 3 are formed so as to be optically coupled. Then, after that, in the insertion hole 2, the optical fiber 3,
3 is stuck.

As the optical filter 7, a deflection filter having a characteristic of selectively absorbing a certain component of the transmitted electromagnetic wave to produce plane polarized light, a light attenuating filter having a characteristic of reducing the amount of light, and a wavelength propagating in the optical fibers 3 and 3. A typical example is a wavelength division filter having a characteristic of reflecting or diffracting and separating a specific signal among signals having different wavelengths.

As shown in FIG. 3, the window 4 provided on the holding substrate 1 is provided with a light receiving element 8 in contact with the optical filter 7. When the light receiving element 8 is provided, the optical filter 7 is provided.
A wavelength division filter is used as. As a result, the wavelength division filter as the optical filter 7 is
A specific signal among signals having different wavelengths propagating in the inside is reflected or diffracted to be separated, and the separated optical signal is received by the light receiving element 8 to demultiplex the specific signal,
It becomes possible to configure the optical branch.

If a half mirror is used as the optical filter 7, it has a characteristic of reflecting or diffracting and separating about half of the signals having the same wavelength that propagate in the optical fibers 3 and 3. By allowing the light receiving element 8 to receive the separated optical signal, a specific signal can be branched to form an optical branch.

A light emitting element 9 capable of transmitting a signal to the optical fiber 3 is attached to the outer end side of one optical fiber 3.
Although optical communication is performed on the outer end side of the other optical fiber 3, it is possible to provide a light receiving element instead of the light emitting element 9.

4 and 5 show a manufacturing method of the embodiment configured as described above.

First, explaining the case shown in FIG. 4, a holding substrate 1 in which the insertion pores 2 penetrate axially is prepared in advance (FIG. 4 (1)), and in the first step, the holding substrate is prepared. A window 4 having a bottom is formed in the holding substrate 1 so that the insertion pore 2 penetrating along the axial direction of 1 is opened (FIG. 4 (2)).

Next, as a second step, a narrow groove 6 is formed in the holding substrate 2 so as to intersect the insertion hole 2 in the axial direction on the bottom surface of the window 4 (FIG. 4C).

Next, in the third step, the optical fibers 3, 3 from which the coating material 3a on one end side has been peeled off are inserted into the insertion pores 2 from the outer end side of the insertion pores 2, and the width is reduced. An optical filter 7 (or a half mirror) for abutting the end faces of the optical fibers 3 and 3 to branch the light into each other is inserted into the groove 6 to form the optical fibers 3 and 3 so that they can be optically coupled (FIG. 4).
(4).

Although the end faces of the optical fibers 3 and 3 are to be cut into inclined faces in order to interpose the optical filter 7, the optical coupling of the optical fibers 3 and 3 is made more reliable to prevent irregular reflection. Therefore, it is preferable to grind this inclined surface. Since the end faces of the optical fibers 3 and 3 are ground with the optical fibers 3 and 3 removed from the insertion pores 2, a more accurate smooth surface can be obtained.

If the optical filter 7 is formed by laminating a filter thin film on the inclined surface, the insertion of the optical filter 7 can be omitted.

Then, the optical fibers 3 and 3 are inserted and the pores 2 are attached.
The bottom surface 4a of the window 4 when inserted into the optical fiber 3, 3
The optical fibers 3, 3 are held by the holding portion 5 formed so as to be located closer to the opening side of the window portion 4 than the axis line of.

Next, referring to FIG. 5, first, one ends of the optical fibers 3 are prepared in a bare state in which the coating material 3a is peeled off.

In the first step, the optical fibers 3 and 3 are
Is an insertion hole 2 penetrating along the axial direction of the holding substrate 1.
Insert from both ends (Fig. 4 (1)).

Next, as a second step, after a radial blade of the holding substrate 1 is cut by a wide blade, it is moved in the axial direction to expose a part of the peripheral surfaces of the optical fibers 3, 3 to the holding substrate 1. Thus, the window portion 4 having a substantially U-shaped cross section is formed. Then, the bottom surface of the window portion 4 is positioned closer to the opening side of the window portion 4 than the midpoint of the optical fibers 3 and 3 to form the holding portion 5 that holds the optical fibers 3 and 3 (FIG. 4 (2)).

Even if the cladding of the optical fiber may be scraped when the window portion 4 is formed, there is no problem as long as the blade does not reach the core.

If necessary, after forming the window portion 4, precision is obtained by grinding the bottom surface 4a using a narrow blade.

Next, as a third step, the bottom surface 4a of the window 4 is formed.
Then, a small width groove 6 is formed so as to cross the axial direction of the holding substrate 1 so as to grind the end faces of the optical fibers 3 and 3 in the insertion hole 2 (FIG. 4C).

In the third step, the end faces of the optical fibers 3 and 3 are also cut into inclined faces. To make the inclined faces even smoother, the optical fibers 3 and 3 are to be made smoother.
3 is taken out from the holding substrate 1, the end surface is ground, and then inserted into the insertion pore 2 again.

Next, as a fourth step, an optical filter 7 for abutting the ablated end faces of the optical fibers to branch the light into the narrow groove 6 or a half mirror for abutting the abutting faces of the optical fibers 3 and 3 to branch the light is inserted. Then, the optical fibers 3 and 3 are formed so that they can be optically coupled (FIG. 4 (4)).

According to the above-described embodiment, even if a part of the peripheral surface of the optical fibers 3, 3 is exposed from the holding substrate 1 due to the formation of the window portion 4, the bottom surface 4a of the window portion 4 has the optical fibers 3, 3. Located closer to the opening side of the window 4 than the axis S of
Since the holding portion 5 that holds the optical fibers 3 and 3 is formed, even if the narrow groove 6 is formed in the holding substrate 1 while the optical fibers 3 and 3 are inserted into the insertion hole 2, the narrow groove 6 is formed. By the forming pressure of 1, the smooth surface can be formed even on the end faces of the optical fibers 3 and 3 without causing the floating phenomenon of the optical fibers 3 and 3, and the optical signal does not cause irregular reflection. Further, by making the optical fibers 3 and 3 removable from the insertion pores 2 after grinding, it is possible to grind the end faces, and thus it is possible to reliably prevent irregular reflection of an optical signal. Then, when the optical fibers 3 and 3 are returned to the insertion pores 2 again, it is preferable to fix the optical fibers 3 and 3 and the holding substrate 1 with an adhesive.

6 and 7 show another embodiment according to the present invention, which is different from the above embodiment in the holding substrate 1.
A transparent glass substrate is used as the holding substrate 1 so that the holding substrate 1 itself is light-transmissive, so that the window portion 4 is eliminated and the narrow groove 6 is formed so as to penetrate the upper portion of the holding substrate 1. Therefore, the light receiving element 8 or the light emitting element 9 is provided on the upper surface side of the holding substrate 1 on the opening side of the narrow groove 6.

With this structure, the narrow groove 6 is formed.
Since the optical fibers 3 and 3 are fixed and held by the insertion pores 2 when forming the optical fiber on the holding substrate 1,
Even if the narrow groove 6 is formed while being inserted into the insertion hole 2, a smooth end face can be formed without causing a floating phenomenon due to the forming pressure of the narrow groove 6, and irregular reflection of the optical signal occurs. There is no. The optical fibers 3 and 3 are
Since it is possible to remove from the insertion hole 2 after forming the narrow groove 6, it is possible to grind the end face, which further prevents irregular reflection of the optical signal. Then, when the optical fiber is returned to the inside of the insertion hole 2, it is preferable to fix the optical fibers 3 and 3 and the holding substrate 1 with an adhesive.

FIG. 8 shows an example in which a plurality of light receiving elements 9 are arranged in series on a single holding substrate 1, and the optical fibers 3, 3 are arranged above the holding substrate 1 so as to be continuous in the axis S direction. A plurality of U-shaped window portions 4 opening upward are formed by notches so that a part of the upper peripheral surface of 3 is exposed, and a light receiving element 9 is attached to each window portion 4, respectively. A small width groove 6 is formed on the bottom surface 4a of the window portion 4 so as to face each of the elements 9 so as to cut the optical fibers 3 and 3 in the insertion hole 2 and to intersect in the axial direction of the holding substrate 1. Optical filters 7 are formed in the narrow grooves 6, respectively, and optical fibers 3, 3 are inserted through the optical filters 7.
Optical coupling is achieved by abutting the end faces of.

FIG. 9 uses a pair of holding substrates 1 and 1 in which the light receiving elements 8 are arranged in the windows 4 and 4, respectively. The filter 7 is arranged and configured. With this configuration, WDM that multiplex-transmits three or more wavelengths such as four wavelengths and eight wavelengths
It can also be used for the system.

It is also possible to mount each module of each of the embodiments shown in FIGS. 3, 7, 8 and 9 described above on a printed circuit board.

[0055]

According to the present invention, when the optical fiber is cut to form the narrow groove in the holding substrate, the shiny fiber is not inserted into the insertion hole, or even if it is inserted, the optical fiber is held by the holding portion. Since it is suppressed by the holding substrate by doing so, a smooth ground surface can be formed without causing the floating phenomenon of the optical fiber due to the forming pressure of the narrow groove, and the optical signal does not cause irregular reflection. .

Further, according to the present invention, the end face can be ground by pulling out the optical fiber from the insertion hole after forming the narrow groove, and therefore, the irregular reflection of the optical signal can be surely prevented. Then, when the optical fiber is returned to the inside of the insertion hole again, it is preferable to fix the optical fiber and the holding substrate with an adhesive.

[Brief description of drawings]

FIG. 1 is a cross-sectional view depicting an embodiment according to the present invention.

[Fig. 2] Similarly, a vertical sectional view

FIG. 3 is a cross-sectional view showing a state in which the product is completed in the embodiment according to the present invention.

FIG. 4 shows a manufacturing method according to an embodiment of the present invention, in which (2) to (4) sequentially depict first to third steps from the preparation step (1).

FIG. 5 shows a manufacturing method according to an embodiment of the present invention, in which (1) to (4) sequentially depict first to fourth steps.

FIG. 6 is a cross-sectional view depicting another embodiment of the present invention.

[Fig. 7] Similarly, a vertical sectional view

FIG. 8 is a transverse sectional view corresponding to FIG. 3, showing a modification of the embodiment according to the present invention.

FIG. 9 is a transverse sectional view corresponding to FIG. 3, showing still another modification of the embodiment according to the present invention.

FIG. 10 is an exploded perspective view of a conventional optical transceiver module

11 is a vertical cross-sectional view of FIG.

FIG. 12 is a vertical cross-sectional view of still another conventional optical transceiver module corresponding to FIG.

[Explanation of symbols]

1 holding substrate 2 Insertion pores 3 optical fiber 4 windows 4a bottom 5 holding part 6 narrow groove 7 Optical filter 8 Light receiving element 9 Light emitting element

Claims (10)

[Claims] 1. A holding hole formed in the holding substrate so as to penetrate in the axial direction of the holding substrate, and the holding so that a part of a peripheral surface of a pair of optical fibers inserted in the insertion hole is exposed. A bottomed window portion formed on the substrate, a holding portion for holding the optical fiber by forming the bottom portion of the window portion on the opening side of the window portion with respect to the axis of the optical fiber, and the holding A narrow groove formed in the holding substrate so as to intersect in the axial direction of the substrate, and an optical filter is inserted into the narrow groove so that the end faces of the optical fibers are butted against each other through the optical filter to branch the light. An optical transceiver module characterized in that the optical fiber is formed so as to be optically coupled. 2. The holding hole so that an insertion hole formed in the holding substrate so as to penetrate in the axial direction of the holding substrate and a part of a peripheral surface of a pair of optical fibers inserted into the insertion hole are exposed. A bottomed window portion formed on the substrate, a holding portion for holding the optical fiber by forming the bottom portion of the window portion on the opening side of the window portion with respect to the axis of the optical fiber, and the holding A narrow groove formed in the holding substrate so as to intersect in the axial direction of the substrate, and a half mirror is inserted into the narrow groove so that the end faces of the optical fibers are butted against each other through the optical filter to split the light. An optical transceiver module characterized in that the optical fiber is formed so as to be optically coupled. 3. An insertion pore formed in the holding substrate so as to penetrate in the axial direction of the holding substrate, and a narrow groove formed in the holding substrate so as to intersect in the axial direction of the holding substrate. An optical transmission / reception module, wherein an optical filter is inserted into the narrow groove and the end faces of the optical fiber are butted against each other through the optical filter to cause optical branching so that the optical fiber can be optically coupled. 4. An insertion hole formed in the holding substrate so as to penetrate in the axial direction of the holding substrate, and a narrow groove formed in the holding substrate so as to intersect in the axial direction of the holding substrate. The optical transceiver module is characterized in that the optical fibers are optically coupled by inserting an optical filter into the narrow groove and abutting the end faces of the optical fibers through the half mirror to optically branch the optical fibers. 5. The optical transceiver module according to claim 1, wherein the holding substrate is controlled to be made of glass. 6. An optical signal demultiplexed by the optical filter,
Alternatively, a light receiving element capable of receiving an optical signal optically branched by the half mirror is attached to the window portion.
The optical signal receiving module described. 7. The optical transceiver module according to claim 1, further comprising a light emitting element or a light receiving element mounted on one end of the holding substrate. 8. The optical transceiver module according to claim 1, wherein the holding substrate is mounted on a printed circuit board. 9. A first step of forming a bottomed window portion on the holding substrate so as to open an insertion hole penetrating along the axial direction of the holding substrate, and the insertion step on the bottom surface of the window portion. The second step of forming a narrow groove on the holding substrate so as to intersect in the axial direction of the attachment pores, and inserting the pair of optical fibers into the insertion pores, and And a third step of forming an optical fiber so that the optical fibers can be optically coupled by inserting an optical filter for abutting the end faces with each other for optical branching or a half mirror for abutting the end faces of the optical fiber for optical branching. The optical fiber is held by a holding portion formed so that the bottom surface of the window portion is located closer to the opening side of the window portion than the axis of the optical fiber when the optical fiber is inserted into the insertion hole. Manufacturing method of optical transceiver module. 10. A first step of inserting an optical fiber into an insertion hole penetrating along the axial direction of a holding substrate, and a cross-section substantially U-shaped so that a part of the peripheral surface of the optical fiber is exposed on the holding substrate. A second step of forming a window-like window portion, and forming a holding portion for holding the optical fiber, the bottom surface of the window portion being located closer to the opening side of the window portion than the midpoint of the optical fiber, A third step of forming a narrow groove on the holding substrate so as to intersect with the axial direction of the holding substrate on the bottom surface of the window portion, and an optical filter for abutting the end faces of the optical fibers in the narrow groove to perform optical branching. Alternatively, a half mirror for abutting the end faces of the optical fiber with each other to branch the light is inserted to form the optical fiber so as to be optically coupled.
And a holding part formed so that the bottom surface of the window part is located closer to the opening side of the window part than the axis of the optical fiber when the optical fiber is inserted into the insertion hole. A method of manufacturing an optical transceiver module, characterized in that it holds the optical fiber.