JP4978156B2 - Optical transceiver module mounting structure, optical transceiver module, and manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of mounting a module for an optical transceiver which is sufficient in electromagnetic radiation measures without restricting a mounting space, and to provide a module for the optical transceiver and its manufacturing method. <P>SOLUTION: The optical fiber of an optical transmission module and that of an optical reception module are taken out from the same hole of a housing, which eliminates a mounting prohibition region of other components depending on the hole position. Thus, only one hole is required without restricting the mounting space, thereby reducing the leak area of electromagnetic waves. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to an optical transceiver module mounting structure, an optical transceiver module, and a manufacturing method.

  In a conventional optical transceiver module, transmission and reception optical fibers are respectively taken out from different holes of the housing.

5A is a rear view of a conventional optical transceiver module, FIG. 5B is a side view of FIG. 5A, and FIG. 5C is a mounting block diagram.
As shown in FIG. 5A, an electrical signal interface 202 is provided on the rear surface of the housing 201, and two optical fiber extraction holes (ferrules) are provided on the side surface of the housing 201 as shown in FIG. Holes) 203 and 204, and the transmitting optical fiber 205 and the receiving optical fiber 206 are individually taken out to the outside.
As shown in FIG. 5C, an external modulator 207, a light source module 208, and an optical receiving module (also referred to as a receiving module) 209 are mounted in the housing 201. The transmission optical fiber 205 connected to the output side (the left side in FIG. 5C) of the external modulator 207 is taken out from one of the holes 203 (the upper left side in FIG. 5C) to the outside of the reception module 209. The receiving optical fiber 206 connected to the input side (left side in this case) is taken out from the other (lower side in this case) hole 204.
The optical fiber 211 connected to the output side of the light source module 208 and the optical fiber 210 connected to the input side of the external modulator 207 are connected at a connection point 212.
The optical transmitter module 200 is configured by the external modulator 207, the light source module 208, and the optical fibers 210 and 211.

However, the following problems occur in the above-described conventional technology.
1. Since there are two extraction holes, a mounting prohibition area for other components in accordance with the respective hole positions is required on the printed board on which the transceiver module is mounted, and the mounting space is limited.
2. Since there are two holes that cause electromagnetic radiation, it is necessary to take countermeasures against electromagnetic radiation at the respective positions.

For this reason, the vicinity of the optical fiber extraction hole is covered with metal, and the metal coating portion of the optical fiber and the optical fiber extraction hole are bonded with a metal bonding material, and the vicinity of the optical fiber extraction hole of the holding case is hermetically sealed. (For example, refer to Patent Document 1), an LD element module and a PD element module are accommodated in one casing, and an optical connector connection portion is provided at one end in the longitudinal direction of the casing, and the other end in the longitudinal direction of the casing. Each having an electrical connector connecting portion disposed therein and including two electrical circuit boards in the housing (see, for example, Patent Document 2), a light emitting end face formed in a spherical shape having a predetermined radius of curvature In the fiber, the position of the beam waist of the light emitted from the tip spherical fiber is in front of the light receiving portion of the light receiving element, and the light incident surface of the light receiving element is relative to the light emitting direction of the light emitted from the tip spherical fiber. Place (See, for example, Patent Document 3), a plurality of optical transmission / reception modules respectively facing the front surface part and the rear surface of the front part as a substantially horizontal air path. There has been proposed that a part of an optical fiber cable takes an air path (for example, see Patent Document 4).
JP 2004-138910 A JP 2005-269474 A JP 2006-126275 A JP 2006-157305 A

However, all of the above-described conventional techniques have a limited mounting space and insufficient electromagnetic radiation countermeasures.
SUMMARY OF THE INVENTION An object of the present invention is to provide an optical transceiver module mounting structure, an optical transceiver module, and a manufacturing method that are not limited in mounting space and have sufficient countermeasures against electromagnetic radiation.

In order to solve the above-mentioned problem, the invention according to claim 1 is the optical transceiver module mounting structure, wherein the optical fiber for transmission connected to the optical transmission module is taken out from the hole of the housing to be an optical reception module. An optical transceiver module mounting structure in which the connected receiving optical fiber passes between the optical transmission module and the inner wall of the casing and is taken out from the same hole of the casing,
The transmitting optical fiber exits from a light source module provided in the housing and passes between the optical receiving module and the inner wall of the housing, and between the modulator and the light source module that modulates an optical signal from the light source module. Connected to the modulator after a further round via the connection point at
The receiving optical fiber from the receiving module to the hole is mounted so as to have a substantially J-shaped planar shape, an 8-shaped, S-shaped, or δ-shaped planar shape .

According to the first aspect of the present invention, the receiving optical fiber connected to the optical receiving module passes between the optical transmission module and the inner wall of the casing and is taken out from the same hole of the casing. By taking out the optical fiber of the optical transmission module and the optical fiber of the optical reception module from the same hole of the housing to the outside, the hole for taking out each optical fiber for transmission and reception becomes one place of the optical transceiver module housing Therefore, the mounting prohibited area on the printed circuit board caused by the removal can be halved. Similarly, since the extraction hole of the optical fiber is provided at one place, it is easy to suppress electromagnetic radiation. Also, by mounting the receiving optical fiber from the receiving module to the hole so as to have a substantially J-shaped planar shape, there is no mounting prohibited area for other parts that match the hole position, so the mounting space is limited. Disappears. Furthermore, by mounting the receiving optical fiber from the receiving module to the hole so as to have an approximately eight-shaped, S-shaped, or δ-shaped planar shape, the receiving module can be arranged in the same direction as in the prior art.

According to the second aspect of the present invention, in the optical transceiver module, in the optical transceiver module, the transmission optical fiber connected to the optical transmission module is taken out from the hole of the housing and is connected to the optical reception module. An optical transceiver module that passes between the optical transmission module and an inner wall of the casing and takes out the optical fiber from the same hole of the casing. A light source module provided in the housing, passing between the light receiving module and the inner wall of the housing, and further passing through a connection point between the light source module and a modulator that modulates an optical signal from the light source module; One round of connection and connection to the modulator, the receiving optical fiber from the receiving module to the hole is substantially J-shaped, eight-shaped, S-shaped, or characterized in that mounted such that the δ-shaped planar shape.

According to the second aspect of the present invention, the receiving optical fiber connected to the optical receiving module passes between the optical transmitting module and the inner wall of the casing and is taken out from the same hole of the casing. By taking out the optical fiber of the optical transmission module and the optical fiber of the optical reception module from the same hole of the housing to the outside, the hole for taking out each optical fiber for transmission and reception becomes one place of the optical transceiver module housing Therefore, the mounting prohibited area on the printed circuit board caused by the removal can be halved. Similarly, since the extraction hole of the optical fiber is provided at one place, it is easy to suppress electromagnetic radiation. Also, by mounting the receiving optical fiber from the receiving module to the hole so as to have a substantially J-shaped planar shape, there is no mounting prohibited area for other parts that match the hole position, so the mounting space is limited. Disappears. Furthermore, by mounting the receiving optical fiber from the receiving module to the hole so as to have an approximately eight-shaped, S-shaped, or δ-shaped planar shape, the receiving module can be arranged in the same direction as in the prior art.

According to a third aspect of the present invention, a housing having a hole through which two optical fibers can pass , and a transmission optical fiber mounted in the housing and connected to the output side are taken out from the optical fiber take-out hole. A modulator that modulates an optical signal from a light source module provided in the housing, and is mounted in the vicinity of the modulator in the housing, and an output side and an input side of the modulator are connected by a connection optical fiber And the receiving optical fiber mounted near the light source module in the housing and on the opposite side of the modulator across the light source module, and connected to the input side. An optical receiving module taken out from the hole,
The transmitting optical fiber exits from the light source module, passes between the optical receiving module and the inner wall of the housing, and further makes a round via a connection point between the modulator and the light source module. The receiving optical fiber from the receiving module to the hole is mounted so as to have a substantially J-shaped planar shape, an 8-shaped, S-shaped, or δ-shaped planar shape .

According to the third aspect of the present invention, the receiving optical fiber connected to the optical receiving module passes between the optical transmitting module and the inner wall of the casing and is taken out from the same hole of the casing. By taking out the optical fiber of the optical transmission module and the optical fiber of the optical reception module from the same hole of the housing to the outside, the hole for taking out each optical fiber for transmission and reception becomes one place of the optical transceiver module housing Therefore, the mounting prohibited area on the printed circuit board caused by the removal can be halved. Similarly, since the extraction hole of the optical fiber is provided at one place, it is easy to suppress electromagnetic radiation. Also, by mounting the receiving optical fiber from the receiving module to the hole so as to have a substantially J-shaped planar shape, there is no mounting prohibited area for other parts that match the hole position, so the mounting space is limited. Disappears. Furthermore, by mounting the receiving optical fiber from the receiving module to the hole so as to have an approximately eight-shaped, S-shaped, or δ-shaped planar shape, the receiving module can be arranged in the same direction as in the prior art.

  A feature of the present invention is that in the optical transceiver module, the optical fiber of the optical transmitting module and the optical fiber of the optical receiving module are taken out from the same hole of the casing of the transceiver module.

  The feature of the present invention is that, in the mounting of the optical transceiver module inside the optical transceiver, the optical fiber of the optical receiver module is mounted between the optical transmitter module and the outer wall of the casing, and is taken out from the same hole of the casing. .

  According to the present invention, by removing the optical fiber of the optical transmission module and the optical fiber of the optical reception module from the same hole of the housing to the outside, there is no mounting prohibition area for other parts matched to the hole position. However, since only one hole is required, the leakage area of electromagnetic waves is reduced.

Embodiments of the present invention will be described with reference to the drawings.
1A is a back view showing an embodiment of a mounting structure of an optical transceiver module according to the present invention, FIG. 1B is a side view of FIG. 1A, and FIG. ) Is a mounting block diagram. In addition, the same code | symbol was used for the same member as the conventional module for optical transceivers mentioned above.
In the present embodiment, an optical transceiver module 100-1 configured by an optical transmission module including an external modulator 207 and a light source module 208 and an optical reception module 209 is illustrated. The electric signal interface 202 means a connection terminal for an electric signal or a power source. Reference numeral 102 denotes an optical fiber extraction hole. Reference numeral 212 denotes a connection point between the optical fiber 206 and the optical fiber 210.

  The optical fiber 210 of the external modulator 207 and the optical fiber 211 of the light source module 208 are connected at a connection point 212. The external modulator 207 and the light source module 208 are connected to the optical fibers 210 and 211, respectively, and a certain length is required to connect the optical fibers 210 and 211. The optical fibers 210 and 211 are routed as in 1 (c).

  The optical reception module 209 is mounted at a position facing the optical transmission module (external modulator 207, light source module 208, and optical fibers 210 and 211). The optical fiber 206 of the optical receiver module 209 is disposed between the external modulator 207 and the inner wall of the housing 101 of the optical transceiver module 100-1, and the optical fiber for transmission of the optical transmitter module is extracted from the optical fiber extraction hole 102. Together with 205, it goes out of the housing. At this time, the receiving optical fiber 206 of the optical receiving module 209 is aligned and fixed using the package, for example, in close contact with the package of the external modulator 207.

  The above-described embodiment shows an example of a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention. is there. For example, in the above-described embodiment, the case where the optical fiber 206 of the optical receiving module 209 has a J-shaped planar shape has been described. However, the present invention is not limited to this, and the optical fiber 206 is configured as shown in FIG. It may be an eight-shaped planar shape.

2A is a rear view showing another embodiment of the mounting structure of the module for optical transceivers according to the present invention, FIG. 2B is a side view of FIG. 2A, and FIG. c) is a mounting block diagram.
The difference between the embodiment shown in FIGS. 2A to 2C and the embodiment shown in FIGS. 1A to 1C is that the optical fiber 206 of the optical receiving module 209 has an almost 8-character shape. There is a point.
Also in the optical transceiver module 100-2 shown in FIGS. 2A to 2C, the same effects as those of the optical transceiver module shown in FIGS. 1A to 1C can be obtained.

3A is a rear view showing another embodiment of the mounting structure of the optical transceiver module according to the present invention, FIG. 3B is a side view of FIG. 3A, and FIG. c) is a mounting block diagram.
The difference between the embodiment shown in FIGS. 3A to 3C and the embodiment shown in FIGS. 1A to 1C is that the optical fiber 206 of the optical receiving module 209 is substantially S-shaped. There is a point.
In the optical transceiver module 100-3 shown in FIGS. 3A to 3C, the same effect as that of the optical transceiver module shown in FIGS. 1A to 1C can be obtained.

4A is a back view showing another embodiment of the mounting structure of the module for optical transceivers according to the present invention, FIG. 4B is a side view of FIG. 4A, and FIG. c) is a mounting block diagram.
The difference between the embodiment shown in FIGS. 4A to 4C and the embodiment shown in FIGS. 1A to 1C is that the optical fiber 206 of the optical receiving module 209 is substantially δ-shaped. There is a point.
In the optical transceiver module 100-4 shown in FIGS. 4A to 4C, the same effects as those of the optical transceiver module shown in FIGS.

  In the above, according to the mounting form of the present invention, the hole for taking out the optical fiber for each transmission / reception becomes one place of the housing of the module for the optical transceiver. Can be halved. Similarly, since the extraction hole of the optical fiber is one place, it is easy to suppress electromagnetic radiation.

(A) is a back view which shows one Embodiment of the mounting structure of the module for optical transceivers concerning this invention, (b) is a side view of (a), (c) is a mounting block diagram. . (A) is a back view which shows other embodiment of the mounting structure of the module for optical transceivers concerning this invention, (b) is a side view of (a), (c) is a mounting block diagram. is there. (A) is a back view which shows other embodiment of the mounting structure of the module for optical transceivers concerning this invention, (b) is a side view of (a), (c) is a mounting block diagram. is there. (A) is a back view which shows other embodiment of the mounting structure of the module for optical transceivers concerning this invention, (b) is a side view of (a), (c) is a mounting block diagram. is there. (A) is a back view of a conventional optical transceiver module, (b) is a side view of (a), and (c) is a mounting block diagram.

Explanation of symbols

100-1 to 100-4 module for optical transceiver 101 housing 102 hole for taking out optical fiber 202 electric signal interface 205 optical fiber for transmission 206 optical fiber for reception 207 external modulator 208 light source module 209 reception module 210, 211 optical fiber

Claims (3)

In the mounting structure of the module for optical transceiver,
The optical fiber for transmission connected to the optical transmission module is taken out from the hole of the housing, and the optical fiber for reception connected to the optical reception module passes between the optical transmission module and the inner wall of the housing. Mounting structure of the module for optical transceiver that is taken out from the same hole of the housing,
The transmitting optical fiber exits from a light source module provided in the housing and passes between the optical receiving module and the inner wall of the housing, and between the modulator and the light source module that modulates an optical signal from the light source module. Connected to the modulator after a further round via the connection point at
A mounting structure of an optical transceiver module, wherein the receiving optical fiber from the receiving module to the hole is mounted so as to have a substantially J-shaped planar shape, an 8-shaped shape, an S-shaped shape, or a δ-shaped planar shape . In the module for optical transceiver,
The optical fiber for transmission connected to the optical transmission module is taken out from the hole of the housing, and the optical fiber for reception connected to the optical reception module passes between the optical transmission module and the inner wall of the housing. An optical transceiver module which is taken out from the same hole of the housing,
The transmission optical fiber exits from the light source module provided in the casing, passes between the optical receiving module and the inner wall of the casing, and between the modulator and the light source module that modulates an optical signal from the light source module. Connect one more round via a connection point to the modulator,
An optical transceiver module, wherein the receiving optical fiber from the receiving module to the hole is mounted so as to have a substantially J-shaped planar shape, an 8-shaped shape, an S-shaped shape, or a δ-shaped planar shape. A housing having a hole through which two optical fibers can pass;
  A modulator that is mounted in the housing and connected to the output side and is extracted from the optical fiber extraction hole, and modulates an optical signal from a light source module provided in the housing;
  The light source module mounted in the vicinity of the modulator in the housing, the output side and the input side of the modulator are connected by a connection optical fiber,
  An optical receiver in which a receiving optical fiber mounted near the light source module in the housing and on the opposite side of the modulator across the light source module and connected to the input side is extracted from the optical fiber extraction hole Module and
The transmitting optical fiber exits from the light source module, passes between the optical receiving module and the inner wall of the housing, and further makes a round via a connection point between the modulator and the light source module. Connected to
An optical transceiver module, wherein the receiving optical fiber from the receiving module to the hole is mounted so as to have a substantially J-shaped planar shape, an 8-shaped shape, an S-shaped shape, or a δ-shaped planar shape.

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