JP2003195119A - Optical transmission module, optical reception module, and optical transmission and reception module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical transmission and reception module of which slits can be easily manufactured and which dispenses with an optical waveguide thereby having low loss. <P>SOLUTION: The slits 4a to 4d are formed perpendicularly to a surface where an optical fiber 3 is installed and obliquely to the optical axis of the optical fiber 3 in a substrate; and wavelength selective filters 5a to 5d which reflect projection light beams from light emitting elements 7a and 7b and light from the optical fiber 3 respectively are inserted into the slits 4a to 4d and the light emitting elements 7a and 7b and light receiving elements 8a and 8b are provided in contact with the optical fiber 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmitter module, an optical receiver module, and an optical transmitter / receiver module used in a bidirectional optical communication system realized by wavelength-multiplexing lights having different wavelengths.

[0002]

2. Description of the Related Art With the rapid development of the Internet market in recent years, there has been a demand for high-speed and large-capacity optical communication, and a wavelength division multiplexing optical communication module is required to meet the demand. Challenges of this wavelength division multiplexing optical communication module include miniaturization, high performance, and low cost.

Various types of optical transceiver modules have been developed so far, and these optical transceiver modules have, for example, a wavelength selection filter inserted in an optical waveguide.
The invention disclosed in Japanese Patent No. 68705 and the Electronics Society Conference C- sponsored by the Institute of Electronics, Information and Communication Engineers of 1997, in which a wavelength selective filter is directly inserted in an optical fiber.
Proposed in 3-89. Each of these configurations is shown in FIG.
And it demonstrates based on FIG.

In the conventional optical transmission / reception module shown in FIG. 10, a groove 102 is provided at a branch portion of an optical branching waveguide formed on a Si substrate 101, and an input light is transmitted through the groove 102 according to a wavelength. Multilayer filter (hereinafter referred to as wavelength selection filter) for branching in the direction of reflection and the direction of reflection 1
03 has been inserted. This wavelength selection filter 103
Transmits the light of wavelength 1.55 μm from the optical fiber 104 and the optical waveguide 105 and makes it enter the light receiving element 107 installed on the Si terrace 106, while the light emitting element 10
The optical fiber 10 reflects the light of wavelength 1.3 μm from 8
4 has the property of emitting light. In this way, the wavelength selection filter 103 realizes the optical transmission / reception effect.

That is, the light receiving element 107 and the light emitting element 10
8 is disposed at a position facing each other with the wavelength selection filter 103 interposed therebetween, and the oscillation wavelength of the light emitting element 108 is 1.3 μm.
m, the wavelength of the light incident on the optical fiber 104 is 1.55 μm
m, the wavelength of the emitted light is 1.3 μm. The wavelength selection filter 103 has a transmission wavelength of 1.55 μm and a reflection wavelength of 1.3 μm.

In FIG. 10, a light receiving element 109 for monitoring is arranged near the light emitting element 108, and an electric wiring 110 is connected to each of the light receiving element 109 for monitoring, the light receiving element 107 and the light emitting element 108. ing.
The reinforcing glass 11 that forms the same plane as the installation surface of the optical fiber 104 at the exit end of the optical fiber 104.
1 is installed.

On the other hand, in the conventional optical transceiver module shown in FIG. 11, a V-shaped groove 202 and a U-shaped groove 203 are formed on a Si substrate 201, and these V-shaped grooves 202 and U are formed.
An optical fiber 204 is embedded in the V-shaped groove 203. Then, the slit 205 is formed in a direction orthogonal to the U-shaped groove 203, and the wavelength selection filter 206 is inserted into the slit 205, whereby the optical fiber 20
It is configured to be obliquely inserted into a part of 4.

Therefore, in the conventional optical transceiver module shown in FIG. 11, the wavelength selection filter 2 is provided in the optical fiber 204.
By inserting 06, the wavelength selection filter 20
The light having the wavelength of 1.55 μm is reflected by the light receiving element 20
On the other hand, the light having a wavelength of 1.3 μm emitted from the light emitting element 208 passes through the wavelength selection filter 206 as it is and enters the optical fiber 204. In FIG. 11, the light receiving element 207 and the light emitting element 208 are each connected to an electric wiring 209.

[0009]

However, in the conventional optical transceiver module shown in FIG. 10 described above, a loss occurs at the branch point of light or the connection point between the optical fiber 104 and the optical waveguide 105. In addition, the fine optical waveguide 10
5 must be formed. In this case, there is a problem that the manufacturing process is complicated and the cost becomes high.

In the conventional optical transceiver module shown in FIG. 11, the slit 2 for inserting the wavelength selection filter 206 is used.
05, the optical fiber 20 of the Si substrate 201 is formed.
Since the slit 205 must be formed obliquely with respect to the installation surface of No. 4, the manufacturing process becomes complicated to obtain a desired angle. In addition, the optical transceiver module shown in FIG.
It was difficult to realize an integrated multi-wavelength optical transceiver module used for wavelength division multiplexing communication of two or more waves.

The present invention has been made in consideration of the above circumstances, and provides an optical transmission module, an optical reception module, and an optical transmission / reception module which can easily manufacture a slit and do not require an optical waveguide. The purpose is to

[0012]

In order to solve the above-mentioned problems, the present invention according to claim 1 provides an optical transmission module for guiding light emitted from a light-emitting element to an optical fiber wire installed on a substrate. A slit is formed in a direction perpendicular to the installation surface of the optical fiber strand of the substrate and obliquely with respect to the optical axis of the optical fiber strand, and wavelength selection for reflecting the emitted light of the light emitting element in the slit is formed. It is characterized in that the light emitting element is provided so as to be in contact with the optical fiber element while inserting the filter. In this way, by forming the slits in the direction perpendicular to the installation surface of the optical fiber element of the substrate and obliquely with respect to the optical axis of the optical fiber element, it is possible to manufacture the slit for inserting the wavelength selection filter. It will be easier. Further, since the light emitting element is provided so as to be in contact with the optical fiber element wire, an optical waveguide is not required, and an optical transmission module with low loss can be realized.

According to a second aspect of the present invention, in a light receiving module for receiving light from an optical fiber element wire installed on a substrate with a light receiving element, the surface of the substrate on which the optical fiber element wire is installed is arranged. A slit is formed in a vertical direction and obliquely with respect to the optical axis of the optical fiber element, and a wavelength selection filter for reflecting light from the optical fiber element is inserted into the slit, while the optical fiber element is inserted. It is characterized in that the light receiving element is provided in contact with a line. In this way, by forming the slits in the direction perpendicular to the installation surface of the optical fiber element of the substrate and obliquely with respect to the optical axis of the optical fiber element, it is possible to manufacture the slit for inserting the wavelength selection filter. It will be easier. Further, since the light receiving element is provided so as to be in contact with the optical fiber element wire, an optical waveguide is not required, and an optical receiving module with low loss can be realized.

According to a third aspect of the present invention, the optical transmission / reception in which the light emitted from the light emitting element is guided to the optical fiber wire installed on the substrate, and the light from the optical fiber wire is received by the light receiving element. In the module, a slit is formed in a direction perpendicular to the installation surface of the optical fiber strand of the substrate, and obliquely with respect to the optical axis of the optical fiber strand, and the light emitted from the light emitting element and the slit are formed in the slit. A wavelength selection filter that reflects light from each of the optical fiber strands is inserted, and the light emitting element and the light receiving element are provided in contact with the optical fiber strands. In this way, by forming the slits in the direction perpendicular to the installation surface of the optical fiber element of the substrate and obliquely with respect to the optical axis of the optical fiber element, it is possible to manufacture the slit for inserting the wavelength selection filter. It will be easier. Also, by providing the light emitting element and the light receiving element in contact with the optical fiber,
An optical waveguide is unnecessary, and a low-loss optical transceiver module can be realized.

According to a fourth aspect of the present invention, in the optical transceiver module according to the third aspect, two or more sets of optical systems of at least one of the light emitting element and the light receiving element are provided in the optical fiber element wire. Characterize. In this way, by providing at least one optical system of at least one of the light emitting element and the light receiving element on the optical fiber, it is possible to simultaneously transmit and receive a plurality of wavelength-multiplexed signals with one optical fiber. It will be possible.

The invention according to claim 5 is the invention according to claim 3 or 4.
In the optical transmitter / receiver module according to the item 1, a light receiving element for monitoring that monitors light transmitted through the wavelength selection filter is provided, and the light receiving element for monitoring, the light emitting element, and the light receiving element are arranged on one side of the optical fiber strand. It is characterized by having done. By arranging the monitor light-receiving element, the light-emitting element, and the light-receiving element on one side of the optical fiber wire in this manner, the structure is such that no element is provided on the other side of the optical fiber wire. The size of the module can be reduced.

The invention according to claim 6 is the invention according to claim 3 or 4.
In the optical transmitter-receiver module according to the item 1, the monitor light-receiving element and the light-emitting element are arranged so as to face each other with the optical fiber strand interposed therebetween. By arranging the monitor light-receiving element and the light-emitting element so as to face each other with the optical fiber strand interposed therebetween, it is possible to arrange the light-emitting element and the light-receiving element at the end portions of the substrate. The distance between each element and the electric circuit is shortened, and as a result, the wire bonding distance can be shortened.

According to a seventh aspect of the present invention, in the optical transceiver module according to the third aspect, the slit into which the wavelength selection filter is inserted includes the core of the optical fiber element wire and is outside the surface of the substrate. It is characterized in that it is formed on the side. In this way, since the slit includes the core of the optical fiber element and is formed outside the surface of the substrate, it does not reach the substrate when processing the slit for inserting the wavelength selection filter. It is possible to avoid damaging patterns such as electrodes installed on the substrate and markers attached to the surface of the substrate. For this reason, the degree of freedom in element arrangement is increased, and the degree of integration can be further increased.

According to an eighth aspect of the present invention, in the optical transceiver module according to the third aspect, a marker for alignment when processing the slit is provided on the substrate, and the light emitting element is provided by this marker. The light receiving element and the monitor light receiving element are also used for alignment when they are arranged on the substrate. In this way, a marker for alignment when processing the slit on the substrate is attached, and this marker can also be used as alignment when arranging the light emitting element, the light receiving element and the monitor light receiving element on the substrate. As a result, the wavelength selection filter can be provided at a predetermined angle and interval with respect to the optical axis of the optical fiber element wire, and the coupling between the light emitting element and the light receiving element and the optical fiber element wire is made unadjusted. Will be easier.

According to a ninth aspect of the present invention, in the optical transceiver module according to the third aspect, the light emitting element is provided on one side surface of the optical fiber element wire, and the light receiving element and the monitor light receiving element are provided on the other side surface. It is characterized in that each element is arranged. Thus, by arranging the light emitting element on one side of the strand of the optical fiber and the light receiving element and the monitor light receiving element on the other side, it is possible to arrange elements of the same type in parallel on one side. It is possible to provide an arrayed device, and it is possible to simplify the device mounting process.

According to a tenth aspect of the present invention, in the optical transceiver module according to the ninth aspect, the light emitting element, the light receiving element and the monitor light receiving element are respectively arrayed. In this way, the light emitting element,
By arraying the light-receiving elements and the light-receiving elements for monitoring, the optical transceiver module can be downsized and the mounting cost can be reduced.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 is a perspective view showing a first embodiment of an optical transceiver module according to the present invention, FIG.
FIG. 3 is a plan view of FIG. 1.

As shown in FIGS. 1 and 2, the optical transmitter-receiver module of the present embodiment has a rectangular flat plate shape Si.
A substrate 1 is provided, and a single V-shaped groove 2 is formed on the Si substrate 1 in the length direction thereof, and an optical fiber element wire 3 is installed in the V-shaped groove 2 and is not shown. It is fixed with an adhesive such as resin.

In the direction which is oblique to the optical axis direction of the optical fiber element wire 3 and which is perpendicular to the installation surface of the optical fiber element wire 3 on the Si substrate 1, four filters are arranged at predetermined intervals. Slits 4a to 4d for insertion are respectively formed,
Wavelength selective filters 5a to 5d, which are wavelength-multiplexed, are inserted into these slits 4a to 4d, respectively.

On one side (one side) of the optical fiber strand 3 on the Si substrate 1, the wavelength selection filters 5a to 5d are provided.
A light receiving element 6a for monitoring, which monitors light transmitted through
6b and a light emitting element 7 for emitting light to the optical fiber strand 3.
a, 7b and light receiving elements 8a, 8b for receiving the light from the optical fiber element wire 3 are respectively arranged.
The a and 7b and the light receiving elements 8a and 8b are arranged so as to be in contact with the optical fiber strands 3, respectively. That is, the light emitting elements 7a and 7b and the light receiving elements 8a and 8b are directly coupled to the optical fiber strands 3, respectively.

Further, the light emitting elements 7a and 7b are arranged near the wavelength selection filters 5a and 5c, respectively, and the light receiving elements 8a and 8b are arranged near the wavelength selection filters 5b and 5d, respectively. . And the light emitting element 7
In the vicinity of a and 7b, monitor light receiving elements 6a and 6b are provided.
b is arranged. Therefore, each of the wavelength selection filters 5a to 5d includes the optical fiber wire 3 and the light emitting elements 7a and 7b.
And the light receiving elements 8a and 8b are installed at an angle at which they are most optically coupled with each other.

Electrodes 9 are formed in a pattern on the upper and lower surfaces of each of the monitor light receiving elements 6a and 6b, the light emitting elements 7a and 7b, and the light receiving elements 8a and 8b.

On the other hand, on the Si substrate 1, as shown in FIG.
Markers 10 are attached, and these markers 1
0 is used for alignment when forming the slits 4a-4d and when mounting each optical system of the monitor light receiving elements 6a, 6b, the light emitting elements 7a, 7b, and the light receiving elements 8a, 8b.

Next, the transmitting and receiving states of the optical transceiver module of this embodiment will be described.

When the transmission signal emitted from the light emitting element 7a is incident on the optical fiber element wire 3, it is reflected by the wavelength selection filter 5a, and the transmission signal advances in the optical axis direction of the optical fiber element wire 3. Meanwhile, the other wavelength selection filters 5b, 5c and 5d through which the transmission signal is to pass.
Then, all is transmitted without being reflected. Here, although a small amount of light leaks from the end surface of the light emitting element 7a opposite to the emission surface, this small amount of light is received by the monitor light receiving element 6a, and automatic output control (APC: Automa) is performed.
tic Power Control) is applied to control the output light intensity to be constant.

On the other hand, the signal from the terminal on the side opposite to the transmission signal passes through the optical fiber strand 3 and is all transmitted through the wavelength selection filters 5c and 5d which do not select this signal.
All are reflected by the wavelength selection filter 5b that selects this signal. The signal thus reflected is received by the light receiving element 8a.

As described above, according to the present embodiment, since the light emitting elements 7a and 7b and the light receiving elements 8a and 8b are arranged so as to be in contact with the optical fiber element wires 3, respectively, the optical waveguide is not used, and the optical waveguide is used. Loss is small.

Further, according to the present embodiment, by using the wavelength selection filters 5a to 5d, it is possible to transmit and receive light of a large number of wavelengths with one optical fiber element wire 3, so that the cost can be reduced. It is possible to realize an optical transceiver module that can be miniaturized.

Further, according to this embodiment, the slit 4a is formed in the direction perpendicular to the installation surface of the optical fiber element wire 3 of the Si substrate 1 and obliquely with respect to the optical axis of the optical fiber element wire 3.
The formation of the slits 4d to 4d facilitates the production of the slits 4a to 4d.

That is, in this embodiment, the Si substrate 1
Slit 4a oblique to the installation surface of the optical fiber strand 3 of
4 to 4d are formed, the slits 4a to 4d are formed in the direction perpendicular to the installation surface of the optical fiber element wire 3 of the Si substrate 1, so that the slits 4a to 4d are formed.
The process of manufacturing d becomes easy.

The light emitting element 7 is attached to the optical fiber wire 3.
By providing two sets of optical systems of a and 7b and light receiving elements 8a and 8b, it becomes possible to simultaneously transmit and receive a plurality of wavelength-multiplexed signals by one optical fiber element wire 3.
In this case, the same effect can be obtained even if two or more optical systems of at least one of the light emitting elements 7a and 7b and the light receiving elements 8a and 8b are provided in the optical fiber strand 3.

Further, the monitor light receiving elements 6a and 6b, the light emitting elements 7a and 7b, and the light receiving elements 8a and 8b are arranged on one side of the optical fiber element wire 3, whereby the optical fiber element wire 3 is formed.
Since an element is not provided on the other side, the optical transceiver module can be downsized.

In the present embodiment, light transmission / reception in which the light emitted from the light emitting elements 7a and 7b is guided to the optical fiber element wire 3 while the light from the optical fiber element wire 3 is received by the light receiving elements 8a and 8b. Although the module has been described, the invention is not limited to this. An optical transmission module that guides the light emitted from the light emitting elements 7a and 7b to the optical fiber element wire 3, or the light from the optical fiber element wire 3 is received by the light receiving elements 8a and 8b. Even when applied to the optical receiving module, the same effect as that of the present embodiment can be obtained.

<Second Embodiment> FIG. 3 is a perspective view showing a second embodiment of the optical transceiver module according to the present invention, and FIG.
FIG. 4 is a plan view of FIG. 3. In addition, in the present embodiment, the same or corresponding portions as those of the first embodiment will be described with reference to FIGS.
The same reference numerals are used. The same applies to the other embodiments.

As shown in FIGS. 3 and 4, the structure of this embodiment different from that of the first embodiment is the arrangement of the monitor light-receiving elements 6a and 6b. That is, the monitor light-receiving elements 6a and 6b are arranged so as to face the light-emitting elements 7a and 7b with the optical fiber element wire 3 interposed therebetween. Also,
Electrodes 9 are patterned and formed on the upper and lower surfaces of the monitor light receiving elements 6a and 6b, the light emitting elements 7a and 7b, and the light receiving elements 8a and 8b, respectively. It is electrically connected.

Next, the transmission and reception states of the optical transmission / reception module of this embodiment will be described.

First, when the transmission signal emitted from the light emitting element 7a is incident on the optical fiber element wire 3, it is reflected by the wavelength selection filter 5a, and the transmission signal advances in the optical axis direction of the optical fiber element wire 3. . In the meantime, the transmission signals are not reflected by the other wavelength selection filters 5b, 5c and 5d through which they are transmitted, but are all transmitted. Here, in the reflection by the wavelength selection filter 5a, a very small amount of light is actually transmitted without being reflected. This light is received by the monitor light-receiving element 6a, and the automatic output control (APC:
Automatic power control) is applied to control the output light intensity to be constant.

On the other hand, the signal from the terminal on the opposite side of the transmission signal passes through the optical fiber strand 3 and is transmitted through the wavelength selection filters 5c and 5d that do not select this signal, but the wavelength that selects this signal. All are reflected by the selection filter 5b. The signal thus reflected is received by a predetermined light receiving element 8a. The other configurations and operations are the same as those in the first embodiment, and the description thereof will be omitted.

As described above, according to the present embodiment, the monitor light-receiving elements 6a and 6b are arranged so as to face the light-emitting elements 7a and 7b with the optical fiber element wire 3 interposed therebetween. , 6b and the light emitting element 7a,
Since 7b can be arranged at the end of each Si substrate 1, the connection distance between each of these elements and the electric circuit can be shortened, and as a result, the wire bonding distance can be shortened and the high frequency characteristics can be improved. Can be improved.

<Third Embodiment> FIG. 5 is an enlarged plan view showing a state in which a slit is formed in an optical transceiver module according to a third embodiment of the present invention. FIG. 6 shows an optical transceiver module according to the present invention. It is an enlarged plan view which shows the state at the time of mounting the light emitting element and the light receiving element in 3rd Embodiment. A plurality of slits, wavelength selection filters, light emitting elements, and light receiving elements are provided as in the first and second embodiments, but in FIGS. The filter 5, the light emitting element 7, and the light receiving element 8 will be described. The same applies to the next fourth embodiment.

As shown in FIGS. 5 and 6, in the present embodiment, the marker 1 used when forming the slit 4 and mounting each element such as the light emitting element 7 and the light receiving element 8.
0a to 10d are attached on the Si substrate 1. That is, the markers 10 a and 10 d are attached on the extension line L of the slit 4 in the oblique direction with respect to the optical fiber element wire 3 on the Si substrate 1. Also, the marker 10
c and 10d are provided on both sides of the mounting position of the light emitting element 7 or the light receiving element 8.

Next, the operation of this embodiment will be described. First, as shown in FIG. 5, the markers 10a and 10d obliquely attached to the optical fiber strand 3 determine the angle at which the slit 4 for installing the wavelength selection filter 5 is processed. Next, as shown in FIG. 6, by using the markers 10c and 10d provided on both sides of the mounting position of the light emitting element 7 or the light receiving element 8, without adjusting the optical axis of the light emitting element 7 or the light receiving element 8, Accurate alignment is performed. Here, the markers 10c, 10
Other markers other than d are also the light emitting element 7 and the light receiving element 8.
The marker is also used when the monitor light-receiving element 6 is mounted.

As described above, according to the present embodiment, the markers 10a and 10d for alignment when processing the slit 4 on the Si substrate 1 are attached, and the light emitting elements 7a and 7b or the markers 10c and 10d are used. By using the light receiving elements 8a and 8b also as alignment when arranging them on the Si substrate 1, the wavelength selection filter 5 can be provided at a predetermined angle and interval with respect to the optical axis of the optical fiber element wire 3. In addition, since the coupling between the light emitting element 7 and the light receiving element 8a and the optical fiber element wire 3 is not adjusted, the manufacture becomes easy.

That is, according to the present embodiment, accurate alignment is performed by the marker 10 at the optimum angle for installing the wavelength selection filter 5, and the light emitting element 7 and the light receiving element 8 and the optical fiber element wire 3 are arranged. In the connection with, the accurate alignment can be easily realized by using the same marker without adjusting the optical axis of the optical fiber strand 3.

<Fourth Embodiment> FIG. 7 is a front view showing a fourth embodiment of the optical transceiver module according to the present invention. As shown in FIG. 7, the fiber strand 3 includes a core 3a,
It is composed of a clad layer 3b formed on the outer periphery of the core 3a, and is adhesively fixed in the V-shaped groove 2 with a resin 12.

Further, in the present embodiment, the depth of the slit 4 for inserting the wavelength selection filter 5 is deeper than the core 3a of the fiber strand 3, but does not reach the surface of the Si substrate 1. Is set to.

That is, in the present embodiment, the slit 4 into which the wavelength selection filter 5 is inserted includes the core 3a of the optical fiber element wire 3 and is in a range above the surface of the Si substrate 1, that is, the surface of the Si substrate 1. It is formed on the outer side. In FIG. 7, the active layer 1 is provided in the light emitting element 7.
3 is formed.

As described above, according to the present embodiment, since the slit 4 includes the core 3a of the optical fiber element wire 3 and is formed outside the surface of the Si substrate 1, the wavelength selection filter 5 is inserted. Since the Si substrate 1 is not reached when the slit 4 is processed, patterns such as the electrodes 9 provided on the surface of the Si substrate 1 and the markers 10 attached to the surface of the Si substrate 1 are not damaged. For this reason, the degree of freedom in element arrangement is increased, and the degree of integration can be further increased.

<Fifth Embodiment> FIG. 8 is a plan view showing a fifth embodiment of the optical transceiver module according to the present invention. As shown in FIG. 8, in the present embodiment, the light emitting elements 7a and 7b are provided on one side of the optical fiber element 3, and the monitor light receiving elements 6a and 6b and the light receiving elements 8a and 8b are provided on the other side. It is arranged so as to contact the line 3.

As described above, according to this embodiment, the light emitting elements 7a and 7b are arranged on one side of the optical fiber element 3, and the monitor light receiving elements 6a and 6b and the light receiving elements 8a and 8b are arranged on the other side. By doing so, it is possible to arrange elements of the same type side by side on one side, so that it is possible to provide an arrayed element, etc., the number of parts is reduced, and the element mounting process is simplified. Also, the implementation cost can be reduced.

<Sixth Embodiment> FIG. 9 is a plan view showing a sixth embodiment of the optical transceiver module according to the present invention. As shown in FIG. 9, in the present embodiment, the light emitting elements 14 arrayed on one side of the optical fiber strand 3 and the light receiving elements 15 arrayed on the other side are in contact with the optical fiber strands 3, respectively. It is arranged.

As described above, according to this embodiment, the light emitting elements 14 arrayed on one side of the optical fiber strand 3 and the light receiving elements 15 arrayed on the other side are in contact with the optical fiber strands 3, respectively. By arranging the optical transmission / reception module, the optical transceiver module can be downsized and the mounting cost can be reduced.

In this embodiment, only the arrayed light receiving elements 15 are arranged on the other side of the optical fiber element wire 3. However, the present invention is not limited to this, and the arrayed light receiving elements 15 and the arrayed monitor light receiving elements are arranged. Both may be arranged.

Further, the present invention is not limited to the above-mentioned respective embodiments, and various modifications can be made. For example, Si
Although the groove for fixing the optical fiber strand 3 is formed in the substrate 1 in the V shape, it may be formed in the U shape.
It suffices that a recess be formed in the.

[0061]

As described above, according to one aspect of the present invention, the substrate is oblique to the optical axis of the optical fiber wire in a direction perpendicular to the installation surface of the optical fiber wire. By forming the slit and providing the light emitting element in contact with the optical fiber, it is easy to manufacture the slit for inserting the wavelength selection filter, and an optical waveguide is not required, and a low loss optical transmission module is realized. be able to. Further, according to another aspect of the present invention, the slit is formed in a direction perpendicular to the installation surface of the optical fiber strand of the substrate and obliquely with respect to the optical axis of the optical fiber strand. Since the light receiving element is provided so as to be in contact with, the slit for inserting the wavelength selection filter can be easily manufactured, an optical waveguide is not required, and a low loss optical receiving module can be realized. Further, according to another aspect of the present invention, a slit is formed in a direction perpendicular to the installation surface of the optical fiber element of the substrate and obliquely with respect to the optical axis of the optical fiber element, By providing the light emitting element and the light receiving element in contact with each other, it is easy to manufacture a slit into which the wavelength selection filter is inserted, an optical waveguide is not required, and a low loss optical transceiver module can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an optical transceiver module according to the present invention.

FIG. 2 is a plan view of the optical transceiver module shown in FIG.

FIG. 3 is a perspective view showing a second embodiment of the optical transceiver module according to the present invention.

4 is a plan view of the optical transceiver module shown in FIG.

FIG. 5 is an enlarged plan view showing a state at the time of forming a slit in the third embodiment of the optical transceiver module according to the present invention.

FIG. 6 is an enlarged plan view showing a mounted state of a light emitting element and a light receiving element in a third embodiment of an optical transceiver module according to the present invention.

FIG. 7 is a front view showing an optical transceiver module according to a fourth embodiment of the invention.

FIG. 8 is a plan view showing a fifth embodiment of the optical transceiver module according to the present invention.

FIG. 9 is a plan view showing a sixth embodiment of the optical transceiver module according to the present invention.

FIG. 10 is a perspective view showing a conventional optical transceiver module using an optical waveguide.

FIG. 11 is a perspective view showing a conventional surface mount optical transceiver module.

[Explanation of symbols]

1 Si substrate (substrate) 2 V-shaped groove 3 Optical fiber wires 3a core 3b clad layer 4a-4d slit 5a-5d wavelength selection filter 6,6a, 6b Light receiving element for monitor 7,7a, 7b Light emitting element 8,8a, 8b Light receiving element 9 electrodes 10,10a-10d markers 11 wires 12 resin 13 Active layer 14 Arrayed light emitting device 15 Arrayed light receiving element

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01S 5/022 H01L 31/02 C 5F089 F term (reference) 2H037 AA01 BA02 BA11 CA10 CA37 DA03 DA04 DA06 DA12 2H048 GA04 GA13 GA23 GA26 GA32 GA62 5F041 AA37 AA38 AA39 AA45 EE02 EE03 EE06 EE22 EE23 FF14 5F073 AB28 BA01 FA06 FA07 FA30 5F088 BA16 EA09 EA11 JA03 JA13 JA14 JA20 5F089 AA01 AC10 AC13 AC17 AC24 AC30 GA07

Claims (10)

[Claims] 1. An optical transmission module that guides light emitted from a light emitting element to an optical fiber strand installed on a substrate,
A slit is formed in a direction perpendicular to the installation surface of the optical fiber strand of the substrate and obliquely with respect to the optical axis of the optical fiber strand, and a wavelength for reflecting the emitted light of the light emitting element in the slit. An optical transmission module, wherein the light emitting element is provided so as to be in contact with the optical fiber strand while inserting a selection filter. 2. An optical receiving module, wherein a light receiving element receives light from an optical fiber elemental wire installed on a substrate, in a direction perpendicular to an installation surface of the optical fiber elemental wire of the substrate, and the optical fiber. A slit is formed obliquely with respect to the optical axis of the fiber strand, and a wavelength selection filter that reflects light from the optical fiber strand is inserted into the slit, while the light receiving element is in contact with the optical fiber strand. An optical receiver module, which is provided as described above. 3. An optical transmission / reception module in which light emitted from a light emitting element is guided to an optical fiber element wire installed on a substrate, while light from the optical fiber element wire is received by a light receiving element. A slit is formed in a direction perpendicular to the installation surface of the optical fiber strand, and obliquely with respect to the optical axis of the optical fiber strand, and the emitted light of the light emitting element and the optical fiber strand from the slit are formed in the slit. An optical transceiver module, characterized in that a wavelength selection filter for reflecting light is inserted and the light emitting element and the light receiving element are in contact with the optical fiber element wire. 4. The optical transceiver module according to claim 3, wherein two or more sets of optical systems of at least one of the light emitting element and the light receiving element are provided on the optical fiber strand. 5. A monitor light-receiving element for monitoring light transmitted through the wavelength selection filter is provided, and the monitor light-receiving element, the light-emitting element and the light-receiving element are arranged on one side of the optical fiber strand. The optical transmission / reception module according to claim 3 or 4, characterized in. 6. The optical transceiver module according to claim 3, wherein the light receiving element for monitoring and the light emitting element are arranged so as to face each other with the optical fiber wire interposed therebetween. 7. The slit for inserting the wavelength selection filter includes a core of the optical fiber element wire and is formed on an outer side of a surface of the substrate.
The optical transceiver module described in. 8. A marker for alignment when processing the slit is provided on the substrate, and when the marker is used to arrange the light emitting element, the light receiving element, and the monitor light receiving element on the substrate. 4. The optical transceiver module according to claim 3, which is also used for alignment of the optical transceiver. 9. The optical transceiver module according to claim 3, wherein the light emitting element is arranged on one side of the optical fiber and the light receiving element and the monitor light receiving element are arranged on the other side. 10. The optical transceiver module according to claim 9, wherein the light emitting element, the light receiving element, and the monitor light receiving element are arrayed.