KR101944943B1 - Optical transmitting and receiving module and manual alignment method thereof - Google Patents

Abstract

According to the present invention, there is provided a semiconductor device comprising: a substrate on which an electronic chip is mounted on a main surface and on which a guide coupling groove is formed; A guide holder including a substrate engaging portion coupled to the guide defect groove, and a photo aligned polygonal groove formed side by side; An optical assembly including a polygonal optical alignment portion formed on a back surface corresponding to the photo aligned polygonal groove and an optical fiber guide portion formed on a main surface and on which an optical fiber is mounted; And an optical element aligned with respect to an edge of the photo aligned polygonal groove.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical transceiving module,

The present invention relates to an optical transmission / reception module and a method for manually aligning optical transmission / reception modules.

An optical transmission and reception module for transmitting and receiving an optical signal includes an optical element mounted on a substrate or mount and generating or receiving an optical signal, an electronic element connected to the optical element to transmit and receive an electrical signal, A lens for achieving optical coupling between the optical element and the optical fiber, and a mirror or prism for changing the optical signal path according to the structure.

The optical transceiver module is fabricated by using active alignment method for aligning while monitoring the intensity of an optical signal in coupling optical signals between an optical element and an optical fiber. However, in order to apply the active alignment method, expensive active sorting equipment is required, the assembly time is long, productivity is low, and manufacturing cost is high. Therefore, a structure requiring manual alignment is adopted.

Implementation of the optical transceiver module by manual alignment improves the productivity by shortening the assembling time and reduces the manufacturing cost and manufacturing cost by reducing the number of parts compared with the active alignment method.

In order to realize the optical transmission / reception module by the manual alignment method, it is necessary to increase the assembly precision between components and minimize the optical alignment error.

SUMMARY OF THE INVENTION The present invention provides an optical transmission / reception module and a method for manually aligning an optical transmission / reception module, which improves the accuracy of assembly between components of the optical transmission / reception module, minimizes optical alignment error,

According to an aspect of the present invention, there is provided an optical transceiver module including: a substrate having an electronic chip mounted on a main surface thereof and having a guide groove formed therein; A guide holder including a substrate engaging portion coupled to the guide defect groove, and a photo aligned polygonal groove formed side by side; An optical assembly including a polygonal optical alignment portion formed on a back surface corresponding to the photo aligned polygonal groove and an optical fiber guide portion formed on a main surface and on which an optical fiber is mounted; And an optical element aligned with respect to a corner of the photo aligned polygonal groove.

Here, the guide holder may include: a rim having a rectangular shape; And an opening portion formed by the rim portion, wherein the substrate joining portion is formed on a back surface of the rim portion, and the photo aligned polygonal ridge portion is formed in a central portion of a long side of the rim portion.

Here, the optical assembly may further include a cover portion formed to protect the electronic chip.

Here, the optical assembly includes: a reflection mirror for reflecting an optical signal from the optical fiber and / or the optical element; And a condenser lens for condensing one of the reflected light and the light directed to the reflection mirror.

Here, the optical fiber guide part may include a plurality of V-shaped or U-shaped grooves on which the optical fiber is mounted.

Here, the photo aligned polygonal groove may be a photo aligned rectangular groove.

Here, the optical element may be vertically spaced apart from the imaginary line connecting the apexes of the optically-aligned square grooves formed so as to be arranged at predetermined intervals.

Here, the optical transmission / reception module may further include an optical fiber fixing part formed to fix the optical fiber to the optical fiber guide part.

Here, the guide holder may have a U-shape, and the optical assembly may be slidably coupled to the guide holder.

According to another aspect of the present invention, there is provided a method for manually aligning an optical T / R module, comprising: coupling a substrate coupling part of a guide holder to a guide coupling groove of a substrate; Aligning the optical elements on the front side of the electronic chip of the substrate with reference to the optical alignment square groove of the guide holder; Aligning the optical alignment engagement portion of the optical assembly with the optically aligned square groove to couple the optical assembly to the guide holder; And coupling the optical fiber to the optical fiber guide portion of the optical assembly.

The step of aligning the optical elements on the front side of the electronic chip of the substrate with respect to the optical alignment square groove of the guide holder includes the steps of: identifying corner points of the optical alignment square groove; Connecting the corner points of the optically-aligned square grooves located opposite to each other to identify a virtual baseline; And arranging the optical elements side by side at a predetermined distance apart from the virtual reference line by a predetermined distance.

The step of coupling the optical fiber to the optical fiber guide part of the optical assembly may include the step of inserting the optical fiber into the V groove or the U groove formed in the optical fiber guide part.

The step of coupling the optical fiber to the optical fiber guide part of the optical assembly may further include fixing the optical fiber inserted into the V groove or the U groove with a synthetic resin material.

According to an embodiment of the present invention having the above-described configuration, since the edge portion of the square groove, which is not circular, is selected as the reference point of the optical element alignment, the optical alignment error can be minimized.

Further, by forming a V-groove or a U-groove in the optical module assembly for optical fiber seating, it is possible to achieve precise positioning of the optical fiber.

1 is a perspective view of a first embodiment of an optical T / R module according to an embodiment of the present invention.
2 is an exploded perspective view of the optical T / R module shown in FIG.
3 is a perspective view of the substrate of the optical T / R module shown in FIG.
Fig. 4 is a perspective view of the guide holder shown in Fig. 1. Fig.
Figure 5 is a front perspective view of the optical assembly shown in Figure 1;
Figure 6 is a rear perspective view of the optical assembly shown in Figure 1;
Fig. 7 is a partial enlarged view of the optical assembly shown in Fig. 1 for explaining a reference point of alignment of an optical element according to the present invention; Fig.
8 is a view for explaining manual alignment of optical elements in the optical T / R module shown in FIG.
9 is a view for explaining a configuration of an optical fiber guide portion among optical assemblies of the optical T / R module shown in FIG.
10 is an exploded perspective view of a second embodiment of the optical transceiver module according to an embodiment of the present invention.
11 is a flowchart illustrating a method of manually aligning optical T / R modules according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs.

FIG. 1 is a perspective view of a first embodiment of an optical T / R module according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the optical T / R module shown in FIG.

1 and 2, an optical T / R module, which is an embodiment of the present invention, may include a substrate 10, a guide holder 20, an optical assembly 30, and an optical element 40 have.

As shown in FIGS. 1 and 2, the substrate 10 is entirely of a flat plate shape. The substrate 10 is provided with an electronic chip 11 including a driving circuit and a guide engaging groove 13 for engaging with the guide holder 20 is formed around the electronic chip 11. The guide groove 13 may be formed by drilling the substrate 10 formed by injection molding. The guide groove 13 may be formed in a circular shape as a component that is engaged with the substrate engaging portion 23 of the guide holder 20. On the other hand, in front of the electronic chip 11, an optical element 40 is provided.

The guide holder 20 is a component in which the bottom surface is coupled to the substrate 10 and the top surface is coupled to the optical assembly 30. The guide holder 20 is formed of an opening 202 defined by a rim 201 and a rim 201 and is formed on the rear surface of the guide holder 20 in a shape corresponding to the guide groove 13. And a photo-aligned polygonal groove 21 is formed at the center of the upper surface. The light-aligning polygonal groove 21 may be formed in a polygonal shape such as a square or a right-angled rectangle, and the corner of the polygonal groove may be a reference point for aligning the optical element 40. Accordingly, passive light alignment becomes easier and more accurate alignment can be achieved than when the grooves serving as the reference of the light alignment are circular. The shape of the guide holder 20 is different from that of the " C "shape, and the optical assembly 30 is fastened to the guide holder 20 in a sliding manner. This will be described in FIGS. 10 to 11. FIG.

The optical assembly 30 is a component that is mounted on the guide holder 20 and is mounted with a fiber optic fiber 50 that transmits optical signals.

The optical assembly 30 may be configured to include a lens and a mirror which are a polygonal optical alignment fitting 35, an optical fiber guide portion 31, and a cover portion 37, and an optical component 33.

The polygonal optical alignment joining portion 35 is coupled to the size and position corresponding to the photo aligned polygonal groove 21. [ That is, the polygonal optical alignment joining portion 35 is formed on the back surface and is inserted into the photo aligned polygonal groove 21. So that the optical assembly 30 is coupled to the guide holder 20.

An optical fiber guide portion 31 and a lid portion 37 are formed on the main surface. The V-groove or U-groove is formed in the optical fiber guide portion 31, and the optical fiber 50 is seated thereon. Accordingly, the optical fiber 50 is accurately seated in the groove, and the daughter optical element 40 and the optical fiber 50 are aligned with each other. After the optical fiber 50 is seated, the epoxy resin material as the optical fiber fixing portion fills the grooves of the optical fiber 50 and the optical fiber guide portion 31. Thus, the optical fiber 50 is seated on the optical fiber guide portion 31.

On the other hand, the optical assembly 30 includes a lid portion 37. The lid part 37 has a structure for covering the electronic chip 11 of the substrate 10 so that the electronic chip 11 is not exposed to the outside and thus protected against the external environment.

The optical element 40 may be a photodiode when receiving an optical signal or a laser diode when emitting an optical signal. The optical element 40 is aligned in front of the electronic chip 11 with respect to the edge A of the photo aligned polygonal groove.

Hereinafter, a substrate 10 among the optical T / R modules according to an embodiment of the present invention will be described with reference to FIG.

3 is a perspective view of the substrate 10 of the optical T / R module shown in FIG. 3, an electronic chip 11 serving as a driving circuit is attached to a central portion of the substrate 10, and a substrate 10 is formed on the main surface of the electronic chip 11 The guide groove 13 is formed. As shown in the figure, for example, four guide engaging grooves 13 may be formed.

Hereinafter, the guide holder 20 coupled to the substrate 10 will be described in more detail with reference to FIG.

Fig. 4 is a perspective view of the guide holder 20 shown in Fig. The guido holder has a " chi "shape as shown. That is, the opening 202 formed by the rim 201 and the rim 201 in a rectangular shape. Four corrugated substrate joining portions 23 corresponding to the guide engaging grooves 13 are formed on the bottom surface of the rim portion 201. A light-aligning polygonal groove 21 (rectangular groove) serving as a reference for optical alignment of the optical element 40 is formed at the center of the long side of the rim. The edges of the photo-aligned polygonal grooves 21 serve as a reference for aligning the optical elements 40 and the photo-aligned polygonal grooves 21 also serve as fastening means for engagement with the optical assembly 30. [

Hereinafter, the structure of the optical assembly 30 will be described in more detail with reference to FIGS. 5 to 7. FIG.

FIG. 5 is a front perspective view of the optical assembly 30 shown in FIG. 1, FIG. 6 is a rear perspective view of the optical assembly 30 shown in FIG. 1, 1 is an enlarged view of a portion of the optical assembly 30 shown in FIG. 1 to illustrate a reference point.

As shown in Figs. 5 to 7, the optical assembly 30 can be largely composed of the optical guide portion 31, the optical component 33, and the cover portion 37. Fig. The optical fiber guide portion 31 is a portion provided with a plurality of V-grooves or U-grooves (optical fiber guide grooves 311) formed in the inner grooves and the lid portion 37 is a portion for protecting the electronic chip 11 Element. A reflecting mirror 331 (or a prism mirror) for changing the path of the optical signal is formed at the inner end of the guide groove 311 as the optical component 33, And a plurality of lenses are formed to condense the optical signal. As shown in FIG. 7, these lenses are arranged in parallel at predetermined intervals with reference to the edges of the polygonal optical alignment coupler 35. In addition, the optical element 40 to be described later is aligned with respect to the corresponding edge of the photo aligned polygonal groove 21 fastened to the polygonal optical alignment fitting 35. Thus, the alignment of the optical element 40 and the lens 331, the reflection mirror 333, and the optical fiber 50 can be precisely performed.

FIG. 8 is a view for explaining manual alignment of the optical device 40 in the optical T / R module shown in FIG. As shown in Fig. 8, the edge A of the optically-aligned square groove 21 serves as a reference for aligning the optical element 40. Fig. The optical alignment square grooves 21 formed on the opposite sides of the guide holder 20 are formed at the time of molding the guide holder 20 (that is, formed by injection molding), so that the precision is very high. The edge A of the optically-aligned square groove 21 with high precision becomes a light alignment reference of the optical element 40. [ The optical elements 40 are aligned at the positions spaced equidistantly from each other at regular intervals in the imaginary reference line B connecting the opposing edges. Such alignment results in highly precise optical alignment.

Hereinafter, the configuration of the optical fiber 50 guide in the optical assembly 30 of the optical T / R module will be described with reference to FIGS. 9 and 10. FIG.

9 is a view for explaining the configuration of the optical fiber guide part 31 of the optical assembly 30 of the optical T / R module shown in FIG. As shown in the figure, two grooves are formed on the main surface of the optical assembly 30, one of which serves as a lid part 37, and the other one of which has an optical fiber guide part 31 formed therein. The optical fiber guide portion 31 is a U groove or a V groove (311: optical fiber guide groove) in which the optical fiber 50 as a transmission medium of an optical signal is seated thereon. As the optical fiber fixing portion 60, the epoxy is covered, and the optical fiber 50 is fixed to the V-groove or U-groove. This completes the alignment of the optical fiber 50 with respect to the optical assembly 30.

10 is an exploded perspective view of an optical transceiver module according to a second embodiment of the present invention. Description of the same components as those of the first embodiment of the second embodiment described with reference to FIG. 10 will be omitted.

As shown in FIG. 10, in the second embodiment, the guide holder 20 is formed in a U-shape, and the optically-aligned square groove 21 'functions as a sliding fastener having one side opened. The optical assembly 30 is formed with a photo-alignment engaging sliding portion 35 'that is slidably coupled to the guide holder 20. Accordingly, unlike the first embodiment, the guide holder 20 and the optical assembly 30 are coupled through the sliding coupling in the second embodiment.

Hereinafter, a method of manually aligning optical T / R modules according to another embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

11 is a flowchart illustrating a method of manually aligning optical T / R modules according to another embodiment of the present invention. First, a substrate 10 on which a guide groove 13 is formed is provided (S1). Then, the substrate holder 23 of the guide holder 20 is engaged with the guide groove 13 of the substrate 10 to couple the guide holder 20 and the substrate 10 (S2). The optical elements 40 are aligned on the front end of the electronic chip 11 of the substrate 10 with reference to the optical alignment square grooves 21 of the guide holder 20. More specifically, the corner point A of the optically-aligned square groove 21 is checked, and the imaginary reference line B is formed by connecting the corner points A of the optically- And then the optical elements 40 are aligned at a predetermined distance apart from the virtual reference line by a predetermined distance d. This has been described in detail in FIG.

Then, the optical alignment assembly 35 of the optical assembly 30 is fastened to the optical alignment square groove 21 to couple the optical assembly 30 to the guide holder (S4). Then, the optical fiber 50 is coupled to the optical fiber guide portion 31 of the optical assembly 30. In other words, after inserting the optical fiber 50 into the V groove or the U groove formed in the optical fiber guide portion 31, the optical fiber 50 inserted into the V groove or the U groove is fixed by covering the epoxy which is a synthetic resin.

The embodiments described may be constructed by selectively combining all or a part of each embodiment so that various modifications can be made. It should also be noted that the embodiments are for explanation purposes only, and not for the purpose of limitation. In addition, it will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention.

10: substrate
11: Electronic chip
13: Guide coupling groove
20: Guide holder
21: Optical alignment multiple groove (square groove)
23:
30: Optical assembly
31: Optical fiber guide portion
33: Optical parts
35: rectangular (multiple)
37:
40: Optical element
50: Optical fiber

Claims (13)

A substrate on which an electronic chip is mounted on a main surface and on which a guide engaging groove is formed;
A guide holder including a substrate engaging portion formed on a back surface corresponding to the guide engaging groove, and a photo aligned rectangular groove formed on an upper surface;
An optical assembly including a rectangular light alignment unit formed on a rear surface corresponding to the optical alignment square groove and an optical fiber guide unit formed on a main surface and on which an optical fiber is mounted; And
And an optical element arranged on the substrate using the optical alignment square groove as a reference point for optical element alignment to minimize optical alignment error,
The edge of the optically-aligned square groove is vertically spaced apart from a virtual reference line connecting vertexes of the optically-aligned square grooves formed to be opposite to each other, and is used as a reference point of alignment of the optical device aligned on the substrate, , Optical transmit / receive module.
The method according to claim 1,
Wherein the guide holder comprises:
A rectangular portion of a rectangular shape; And
And an opening formed by the rim portion,
Wherein the substrate joining portion is formed on a back surface of the rim portion,
Wherein the optical alignment square groove is formed at a central portion of a long side of the rim.
3. The method of claim 2,
The optical assembly includes:
And a lid part formed to protect the electronic chip.
The method of claim 3,
The optical assembly includes:
A reflection mirror for reflecting an optical signal from the optical fiber and the optical element;
And a condenser lens for condensing one of the reflected light and the light directed to the reflection mirror.
The method of claim 3,
Wherein the optical fiber guide portion includes a plurality of V-shaped or U-shaped grooves on which the optical fiber is mounted.
delete delete The method according to claim 1,
And an optical fiber fixing part formed to fix the optical fiber to the optical fiber guide part.
The method according to claim 1,
The guide holder is formed in a U-shape,
And the optical assembly is slidably coupled to the guide holder.
Coupling the substrate engaging portion of the guide holder to the engaging groove;
Confirming a corner of the optical alignment square groove formed on the upper surface of the guide holder and used as a reference point of alignment of the optical elements to minimize the optical alignment error;
Aligning vertices of the optical alignment square grooves formed opposite to each other to identify virtual baselines;
Aligning the optical elements on the front side of the electronic chip of the substrate so as to be spaced vertically from the imaginary baseline to minimize optical misalignment;
Aligning the optical alignment engagement portion of the optical assembly with the optically aligned square groove to couple the optical assembly to the guide holder; And
And coupling the optical fiber to the optical fiber guide portion of the optical assembly.
delete The method of claim 10, wherein
Wherein coupling the optical fiber to the optical fiber guide portion of the optical assembly includes:
And inserting an optical fiber into a V-groove or a U-groove formed in the optical fiber guide portion.
13. The method of claim 12,
Wherein coupling the optical fiber to the optical fiber guide portion of the optical assembly includes:
And fixing the optical fiber inserted in the V-groove or the U-groove to a synthetic resin material.

Images