JPH11326706A - Receptacle type optical module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receptacle type optical module in novel configuration capable of relaxing the deviation of positions between components to occur in a production process. SOLUTION: Concerning the optical module composed of a package 4 incorporating a carrier 2 and an optical receptacle component 5, the receptacle component 5 has two ferrules 8 and 8 connected through a fiber 9 sufficiently bent while sitting, housing 6 and flange 10 for connection with the package 4 as constitutive members, one ferrule 8 is fixed in the housing 6 and the other ferrule 8 is fixed on the flange 10 for connection. Even when the positions of the receptacle component 5 and an optical element are deviated, since the flange 10 of the receptacle component 5 is floated, the position deviation between the receptacle component 5 and the package 4 can be absorbed and they can be housed in a case component 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receptacle type semiconductor optical device module.

[0002]

2. Description of the Related Art An optical transmitter module incorporating a light emitting element such as a light emitting diode (LED) and a laser diode (LD) and an optical receiver module incorporating a light receiving element such as a photodiode are of a receptacle type or a pig-til type. Has been conventionally manufactured as a basic form. These optical modules are mounted on a wiring board together with the electric circuit components to form an optical communication board. When the pig-tilt type is used for the optical module, a dead space for processing the extra length of the fiber is required on the optical communication board. On the other hand, the receptacle type optical module does not require the extra fiber length processing area on the optical communication board. That is, the receptacle type optical module is more suitable for downsizing the optical communication board than the pigtail type optical module.

FIGS. 3A to 3C show an example of a basic configuration of a receptacle type and a manufacturing procedure thereof. An example of the manufacturing process is as follows. 1) The optical element 1 and the peripheral electric element (omitted in the figure) are mounted on the carrier 2 and necessary wiring connection processing is performed. 2) After operating the optical element 1 and making the optical axis of the lens 3 coincide with the optical axis of the optical element 1, the lens 3 is connected to the carrier 2 by means such as YAG welding. 3) This carrier is built in the package 4 via a Peltier element (omitted in the figure) and the like, and subjected to necessary wiring connection processing. 4) The optical element 1 is operated again to search for a position where the maximum optical coupling efficiency is obtained (the optimum position search is indicated by an arrow in the figure), and then the receptacle part 5 (in the figure, for example, the housing 6, the sleeve 7, (Consisting of ferrule 8, fiber 9, and flange 10) is connected to package 4 by means such as YAG welding. 5) This is mounted in a case component 12 for fixing to an optical communication board, and is completed.

[0004] Here, consider the case where the components are misaligned in the module manufacturing process. FIG. 4 illustrates a case where a displacement has occurred between the optical element 1 and the package 4 in step 3 of FIG. In the figure, a line A is a center line between the optical element 1 and the receptacle component 5, and a line B is a center line of the package 4, showing a state where the package 4 is relatively displaced. The misalignment between the optical element 1 and the package 4 eventually becomes apparent as the misalignment between the receptacle component 5 and the package 4, and the storing process in the case component 12 (the process 5 in FIG. 3) cannot be performed, resulting in a defective product. Leads to the occurrence of As in this example, the positional deviation between the components generated in each of the manufacturing steps shown in FIG. 3 finally becomes apparent as the positional deviation between the receptacle component 5 and the package 4. Therefore, in the manufacture of the receptacle-type optical module, high-precision alignment of components is required in each manufacturing process. Actually, due to this problem, a receptacle-type optical module has been conventionally provided for a simple optical module in which very high precision is not required for positioning components.

On the other hand, in a pig-tilt type optical module,
The package part for housing the optical element and the optical connector part (corresponding to the receptacle part of the receptacle type optical module) are separated, and the space between them is connected by a highly flexible fiber. The package part and the optical connector part are individually fixed to the optical communication board, and the fiber connecting them is accommodated in the extra length processing area on the board. The positional deviation between components and the accumulation thereof in each of the above-described steps during manufacturing can be absorbed by bending the fiber (that is, it can be processed in the extra-long embedding region on the board). Thus, the pig-tilt type optical module is different from the receptacle type,
Since the misalignment between components in each step described above, or the accumulation thereof, can be absorbed by bending the fiber,
It is rarely a problem. This is an advantage of the pig-tilt type optical module over the receptacle type optical module.

Reflecting the above advantages and disadvantages, an actual optical module has a simple configuration and does not require a very high degree of precision in the positioning of components. The optical module has a receptacle type suitable for downsizing an optical communication board. Optical modules, which have a complicated structure and require high precision in positioning components, are not suitable for miniaturization of optical communication boards, but the position between components in the manufacturing process is high. In many cases, it was configured in the form of a pig-tilt, in which displacement was not a problem.

[0007]

As described above, according to the prior art, in an optical module having a complicated structure and requiring high precision in positioning components, a receptacle suitable for downsizing an optical communication board. There is a problem that it is difficult to configure an optical module in a form.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a receptacle type optical module having a novel configuration capable of alleviating a positional shift between components generated in a manufacturing process.

[0009]

According to the present invention, as a means for solving the above-mentioned disadvantages, the present invention relates to a receptacle part having a mechanism for absorbing a positional shift between parts occurring in each of the above-described manufacturing steps. I do.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, a receptacle type optical module according to the present invention is an optical module comprising a package containing an optical element and an optical receptacle component, wherein the receptacle component 5 is fully seated. A ferrule 8 separated into two parts joined by a bent fiber 9,
8, a housing 6, and a flange 10 for connection with the package 4 as constituent members, one ferrule 8 is fixed to the housing 6, and the other ferrule 8 is fixed to the flange 10 for connection. It has features.

Further, the ferrules 8, 8 separated into two parts
The fully buckled fiber 9 coupling is characterized by being a coated fiber. Furthermore, the fully buckled fiber 9 connecting the two separated ferrules 8, 8 is characterized by being protected by a spring mechanism 11 which absorbs external forces.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A receptacle type optical module according to an embodiment of the present invention will be described below in detail with reference to the drawings. In addition,
The same members as those shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted. The receptacle part 5 has two ferrules 8, 8 separated therein, and a fiber 9 connects the two ferrules 8, 8. In other words, the configuration is such that a part of the ferrule (8 in FIG. 1) built in the conventional receptacle part 5 is removed and a part of the fiber (9 in FIG. 1) is exposed. One of the two ferrules 8 is fixed by a cylindrical sleeve 7 provided on the outer periphery thereof, and the other is fixed in a flange 10 provided on the outer periphery thereof. The flange 10 is floating from the housing 6 provided on the outer periphery of the sleeve 7, and the fiber 9 between the two ferrules 8 is sufficiently buckled so as not to limit the movement of the flange 10. In order to prevent breakage of the fiber 9 from external force such as unnecessary movement of the flange 10 at the time of manufacturing or shock when the optical plug is inserted into the receptacle, it is effective to secure the strength with a coated fiber. As shown in the figure, a spring mechanism 11 for absorbing an external force (not limited to the spring mechanism, but any mechanism having the same effect is possible) is provided between the ferrules 8 and 8 separated at the outer periphery of the fiber 9 and into two bodies. It is effective to incorporate them.

FIGS. 2A and 2B show an example of a case where parts are misaligned in a manufacturing process. (A) is a case where a displacement between the carrier 2 and the package 4 occurs in the step of mounting the carrier 2 on the package 4. In the figure, a line A is a center line between the optical element 1 and the receptacle component 5, and a line B is a center line of the package 4, showing a state where the package 4 is relatively displaced. The conventional example is the same as the case where the misalignment between the receptacle component 5 and the package 4 becomes apparent and the storing step 5 in the case component 12 cannot be performed, resulting in a defective product (FIG. 4).

FIG. 2B shows a state in which it is housed in the case component 12. In the figure, line C is the center line of the optical element 1 and line D
Is a center line between the receptacle part 5 and the package 4.
According to the present invention, even if the positional deviation between the receptacle component 5 and the optical element 1 occurs, the positional deviation between the receptacle component 5 and the package 4 can be absorbed because the flange 10 of the receptacle component 5 is floating. Can be stored.

[0015]

As described above, in the receptacle type optical module of the present invention, the receptacle part 5 is composed of two ferrules 8, 8, a housing 6, and a housing 6, which are connected by a sufficiently buckled fiber 9. It has a flange 10 for connection with the package 4 as a constituent member, and one ferrule 8 is fixed to the housing 6 and the other ferrule 8
Was fixed to the connecting flange 10 and the fully buckled fiber 9 connecting the two separated ferrules 8, 8 was a coated fiber,
Further, since the sufficiently buckled fiber 9 connecting the two separated ferrules 8 and 8 is protected by the spring mechanism 11 for absorbing external force, it becomes a problem in the receptacle optical module of the conventional configuration. Optical modules, which have a complicated configuration and require high precision in the alignment of components, avoid the occurrence of defective products due to the positional deviation between components and their accumulation that occur in each manufacturing process. The optical module can be configured in a receptacle shape suitable for downsizing the board.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a receptacle type optical module according to an embodiment of the present invention.

FIGS. 2 (a) and 2 (b) are explanatory views of a case where a positional shift has occurred between components in an assembling process of the receptacle type optical module according to the embodiment of the present invention.

FIGS. 3A to 3C are diagrams showing a configuration of a conventional receptacle-type optical module.

FIG. 4 is an explanatory view showing a case where a positional shift occurs between components in a process of assembling a conventional receptacle-type optical module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical element 2 Carrier 3 Lens 4 Package 5 Receptacle part 6 Housing 7 Sleeve 8 Ferrule 9 Fiber 10 Flange 11 Spring mechanism 12 Case part

Claims (3)

[Claims] An optical module comprising a package containing an optical element and an optical receptacle component, wherein the receptacle component (5) is separated into two parts joined by a sufficiently buckled fiber (9). Ferrule (8,
8), a housing (6), and a flange (10) for connection with the package (4) as constituent members. One ferrule (8) is fixed to the housing (6), and the other ferrule (8). ) Is a receptacle type optical module fixed to a connection flange (10). 2. A ferrule (8, 8) separated into two parts.
The receptacle type optical module according to claim 1, wherein the fully buckled fiber (9) coupling the optical fiber is a coated fiber. 3. A ferrule (8, 8) separated into two parts.
2. The receptacle type optical module according to claim 1, wherein the fully buckled fiber connecting the first and second fibers is protected by a spring mechanism for absorbing external force.