KR101959501B1 - Passive aligned optical-electro module and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a photoelectric module including an optical fiber holder coupled to a photoelectric module, wherein the optical fiber holder has one or more optical fiber mounting grooves formed on an upper surface of the optical fiber holder in a longitudinal direction, At least one alignment mark, at least one optical fiber holder alignment groove formed in a portion of the optical fiber holder, and an optical fiber coupled to the optical fiber mounting groove and including a 45 degree longitudinal section; A board unit to which the optical fiber holder is coupled; Wherein the board portion includes an alignment trench, an optically active element, an electronic active element, and an electronic manual irradiation; The alignment grooves correspond to the optical fiber holder alignment grooves and the alignment grooves and the optical fiber holder alignment grooves are coupled by alignment pins so that the 45 degree longitudinal cross section optically couples to the output and / Ring.

Description

TECHNICAL FIELD [0001] The present invention relates to a passive optical alignment packaged photoelectric module and a manufacturing method thereof,

The present invention relates to a method of packaging an optical module and an optical module packaged using the method. More particularly, to a fully passively aligned packaged optical module in which all of the arrangements are arranged in a manual alignment manner in packaging the optical modules.

In order to enable ultra-high-speed data transmission and high-quality video signals in addition to the launch of new smart electronic devices all over the world, interface development has been increasing to satisfy customer convenience and high-speed data transmission needs, . Therefore, a technology capable of high-speed data transmission of 10 Gbps and a transmission distance of 10 m or more is required.

In general, in order to perform high-speed optical transmission, an optical transceiver that converts an electric signal into an optical signal is separately required, and a general technique is to connect the optical transceiver with an optical cable including an optical fiber.

However, when an optical transceiver is used, there is a disadvantage that a separate space is required, and there is a disadvantage in that it is not possible to meet a commonly used cable standard.

In order to solve such a problem, an active optical fiber photoelectric module including an ultra-small optical transceiver capable of converting an electric signal into an optical signal and an optical signal into an electric signal has become an issue.

In a photoelectric module such as an active optical cable type photoelectric module, an array type optical connection photoelectric module, optical USB, optical HDMI, optical DVI, and optical display-port, Alignment accuracy between the light source and the photodetector is required to be ± 1 μm or less, and in the case of the multimode, alignment accuracy of about ± 5 μm is required.

In order to fabricate the optical coupling device with such a very precise structure, the optical coupling between the optical fiber and the light source / photodetector is fixed by the active alignment method using a high-precision stage and an external power source. This active alignment method precisely adjusts the optical fiber not only to the XYZ axis but also to the rotation axis in a state where the light source / optical detector keeps the operation state, and finds the position where the maximum optical coupling is performed. I will.

Since the conventional bidirectional optical transceiver using active alignment assembly method uses a side emission laser (edge emission laser), performance deterioration at high temperature is extreme, feedback control using a monitor photodiode is required, and the material cost is high. There is a problem that the structure of the lens optical system becomes complicated. In addition, in a conventional bidirectional optical transceiver, even if a vertical cavity light emitting diode (VCSEL) is used on one side of a communication channel, the non-VCSEL is used on the opposite side to maximize the advantages of the VCSEL, It was not possible to meet the demand even if there was a large demand in the market. In case of using the adhesive to fix the TO can to the housing of the optical module, if the temperature of the module changes, the TO can moves finely due to the difference in the thermal expansion coefficient between the adhesive and the surrounding metal, There is a problem that a process for locally welding with a laser is necessary instead of using a high-cost assembly facility, which is unsuitable for mass production.

On the other hand, pick-and-place manual alignment assembly does not require a separate device to operate the light source / photodetector and simply takes each part in place, Less. The biggest obstacle in this passive alignment method is packaging of photoelectric modules having a high-precision structure.

On the other hand, in order to construct a thin photoelectric module of active optical cable type photoelectric module, array type optical connection photoelectric module, optical USB, optical HDMI, optical DVI, and optical display-port, 45 degrees, coupling to the optically active element. (Fig. 1). However, when the optical fiber is formed to have a 45 degree angle, there is a problem that a process of grinding is required, and there is a problem that a large amount of air is introduced. In the case of using a plurality of optical fibers, , It is difficult to apply to a photoelectric module using a plurality of optical fibers.

In order to solve such a problem, a structure in which the 45-degree mirror block 1 as shown in Fig. 2 is included in the middle and the lens 2 is used has been proposed. Such a structure requires a separate holder for grasping the mirror block 1 and the lens 2, so that the thickness becomes thick and problems such as tolerance arise because an optical system is used.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical fiber holder including an optical fiber having a 45 degree cut surface capable of passive optical alignment packaging. The present invention also provides a method of manufacturing an optical module packaged by passive optical alignment using the optical fiber holder.

One embodiment of the optical fiber holder coupled to the photoelectric module as the means for solving the problems of the present invention comprises at least one optical fiber mounting groove formed in the longitudinal direction on the upper surface of the optical fiber holder; At least one alignment mark formed in a portion of the optical fiber holder; At least one optical fiber holder alignment groove on the alignment mark of the optical fiber holder, and another predetermined portion of the optical fiber mounting groove. An optical fiber coupled to the optical fiber mounting groove; And an end surface of the optical fiber includes a longitudinal section of 45 degrees.

In one embodiment, the distance between the end of the optical fiber and the alignment mark is spaced apart by a predetermined distance.

According to an aspect of the present invention, there is provided an apparatus for terminating an optical fiber having a predetermined angle, comprising: an optical fiber mounting groove capable of positioning at least one optical fiber; An optical fiber holder including the optical fiber mounting groove; A support portion on which the optical fiber holder is located; Wherein the at least one optical fiber is longer than the optical fiber holder and protrudes to one side of the optical fiber holder; A cutting portion including a cutting edge having a first angle, the cutting portion being spaced apart from the protruding optical fiber by a predetermined distance and rotating; Wherein the optical fiber mounting groove is formed on an upper surface of the optical fiber holder in a longitudinal direction and is positioned on the upper surface of the support so that the upper surface of the optical fiber holder is bottomed, And the end of the optical fiber has the predetermined angle through cutting the optical fiber of the optical fiber.

In one embodiment, the optical fiber holder further comprises an alignment mark, and after locating the optical fiber holder on the support, the alignment mark is identified using a sensing device, And the at least one optical fiber is cut.

In one embodiment, the optical fiber holder further includes a fixing member for fixing at least a part of the protruding optical fiber after positioning the optical fiber holder on the upper surface of the supporting part.

In one embodiment, the first angle is approximately 90 degrees, and the predetermined angle is approximately 45 degrees.

According to an aspect of the present invention, there is provided a method of forming an end of an optical fiber having a predetermined angle, comprising the steps of: placing the at least one optical fiber on an optical fiber holder, which includes an optical fiber mounting groove on an upper surface thereof, Positioning the holder in a protruding manner on one side of the holder; Fixing the positioned optical fiber; Positioning the optical fiber holder upside down on a support; And cutting the projecting optical fiber using a cutting portion including a cutting edge having an end of a first angle.

In one embodiment, the method further comprises fixing the protruded optical fiber using a fixing member after positioning the optical fiber holder on the support portion in an inverted position.

In one embodiment, the optical fiber holder further comprises an alignment mark; Capturing a position of the alignment mark after positioning the optical fiber holder in an inverted position; Further comprising the step of using the cutting portion by a predetermined distance from the position of the alignment mark.

According to an aspect of the present invention, there is provided a photoelectric module including an optical fiber holder coupled to a photoelectric module, wherein the optical fiber holder includes one or more optical fiber mounting grooves formed on an upper surface of the optical fiber holder in a longitudinal direction, At least one alignment mark formed in the optical fiber holder, at least one optical fiber holder alignment groove formed in a portion of the optical fiber holder, and an optical fiber coupled to the optical fiber mounting groove and including a 45 degree longitudinal section; A board unit to which the optical fiber holder is coupled; Wherein the board portion includes an alignment trench, an optically active element, an electronic active element, and an electronic manual irradiation; Wherein the alignment groove portion corresponds to the optical fiber holder alignment groove and the alignment groove portion and the optical fiber holder alignment groove are coupled by an alignment pin so that the 45 degree longitudinal face is optically coupled to the output portion and / And is coupled.

In one embodiment, the optical fiber mounting groove is deeper than the diameter of the optical fiber.

In one embodiment, the cross-sectional shape of the optical fiber mounting groove is any one of a U-shape, a V-shape, and a rectangular shape.

According to an aspect of the present invention, there is provided a method of manufacturing a photoelectric module, including: mounting one or more optical fiber mounting grooves on a top surface of the optical fiber holder in a lengthwise direction; Combining the optical fibers; Cutting the longitudinal section of the optical fiber by 45 degrees; And coupling the optical fiber holder including the cut optical fiber to the board.

The present invention relates to a technique for manually aligning and assembling the above-mentioned optical fiber block by using an aligning groove and an aligning pin. On top of the board, optoelectronic active / passive devices can be packaged in a chip-on-board form. (Features: Reduced assembly time, compact structure, reduced number of alignment parts)

High-speed data signals of 25Gbps per channel in terms of high-speed data signal quality must be transmitted over long distances to optical fiber through electronic elements and optical devices through transmission lines on the top of the board. In order to transmit the high-speed data signal without distortion, it is advantageous for the signal flow to flow in-plane without the signal discontinuity from the top surface of the board by chip-on-board as in the proposed technique.

Also, a thin package is possible. The proposed technology, which is a thin package, will have many advantages if the interface is changed from the existing electrical interface to optical in accordance with the trend of thinness of smart electronic devices (TV, tablet, smartphone, etc.). If a thin package is available, a space for mounting other components is widened, and there are many advantages in terms of mechanism design.

FIG. 1 shows a conventional optical fiber holder and packaging configuration using a 45-degree polished optical fiber.
FIG. 2 shows an optical fiber holder and packaging configuration using a conventional 45-degree optical mirror.
3 shows the optical fiber holder
Fig. 4 shows a structure for mounting an optical fiber in the optical fiber holder of the present invention
5 shows a structure for fixing an optical fiber to the optical fiber holder of the present invention
6 to 11 Examples of cutting the end of an optical fiber using the optical fiber holder of the present invention
12 is a plan view of the board
13 shows a structure in which an optical fiber holder is mounted on a board portion of the photoelectric module of the present invention
Figure 14 is a cross-sectional view of the structure in which the optical fiber holder is mounted on the board portion

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is to be understood that the term "comprises" or "having" in the present application does not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification .

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, a passive optical alignment packaged photoelectric module and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

3 is an optical fiber holder 100 for use in a passive optical alignment packaged optoelectronic module.

The optical fiber holder 100 includes an optical fiber mounting groove 110, an alignment mark 120, and an alignment groove 130.

The alignment grooves 130 may be formed in the shape of a through-hole, and may be formed to have substantially the same diameter as the alignment pin (described later). In addition, the shape of the through-hole may be one or more , It is preferable to include two alignment grooves 130 in consideration of the size of the entire photoelectric module.

The optical fiber mounting groove 110 may be formed in a variety of shapes as long as a conventional optical fiber has a depth. The shape may be a rectangular shape, a V-shaped groove, a U-shaped groove, or the like. The number of the optical fiber mounting grooves 110 may be one or more. In the case of a photoelectric module capable of bidirectional transmission with one optical fiber, one optical fiber mounting groove 110 may be formed, and in the case of a photoelectric module performing bidirectional transmission with two optical fibers, two optical fiber mounting grooves 110 may be formed .

The alignment mark 120 is formed at a predetermined position in the designing step of the photoelectric module, and may be formed in various shapes and shapes, and the number of the alignment marks 120 may be one or more. It may be formed as a through hole as shown in the drawing, or may be formed by a display in which a shape is formed.

However, two-direction alignment mark shapes such as those described in the drawings are preferable to alignment marks in one direction. The reason is that, when there is an alignment mark only in one direction, a slight error may occur. However, when two alignment marks are used, the alignment mark error can be minimized.

Also, it is preferable to configure a plurality of alignment marks because it is preferable to use a plurality of alignment marks rather than to identify one alignment mark.

The optical fiber holder 100 is preferably a substantially transparent material. The reason for this is to confirm the alignment mark 120 to be described later on the opposite side by vision.

The optical fiber holder 100 can be manufactured by imprinting using a polymer material such as PMMA. If the wafer is manufactured in the above-described manner, the wafer can be mass-produced. Although glass or other materials can be manufactured by injection molding, the unit price can be increased. Also. If the overall shape is symmetrically formed, the production can be facilitated.

The optical fiber 200 is placed in the optical fiber mounting groove 110 of the optical fiber holder 100 such that the optical fiber 200 is exposed in a predetermined length or more in one direction of the optical fiber mounting groove 110 and is hardened by using the epoxy 3, 200). The direction opposite to the one direction is the output or input direction of the photoelectric module. (Figures 4 and 5)

The optical fiber holder 100 including the hardened and fixed optical fiber is turned upside down as shown in FIG. 6 so that the optical fiber is placed in close contact with the support portion 300. The support part 300 may be used as a blue tape, and may have an adhesive force, so that when the UV is irradiated after the adhesive is applied, the adhesive part may be separated from the adhesive part. Or may be fixed using surface tension and static electricity.

In order to protect and fix the optical fiber exposed on the optical fiber 200 exposed in the optical fiber holder 100 located on the upper surface of the support part 300, the fixing member film preferably has no adhesive force, The exposed optical fiber can be fixed.

In addition to the separate film 310, it can be fixed through a separate member. However, when a separate member is used, the optical fiber 200 exposed in the optical fiber holder 100 has a short length after being cut, which is difficult to manufacture. (Fig. 7)

After the film 310 is pasted, the alignment mark is recognized and sowing is performed using the sawing device 400, spaced apart from the alignment mark by a design predetermined amount.

The sawing apparatus 400 includes a predetermined cutting edge 410, and the cutting edge 410 is rotated by the rotation axis to perform sowing. The end of the cutting edge 410 has a tapered shape with an angle of about 90 degrees. When the optical fiber is sawed at an angle of about 90 degrees, the optical fiber is cut at an angle of about 90 degrees. Then, the cut part has a relative angle of 45 degrees. After cutting, the film 310 is removed, and the optical fiber holder 100 is separated from the support part 300. (Fig. 8 to Fig. 10). As a result, the end of the optical fiber coupled to the optical fiber holder 10 has an angle of 45 degrees.

11, an optical fiber holder 100 including an optical fiber having a 45-degree longitudinal end surface with the same distance from one another can be manufactured even if a plurality of optical fibers exist in the form of an array. It is possible to manufacture the optical fiber at a much faster speed than the conventional method of polishing the individual optical fibers and the alignment position is already formed at the position determined from the alignment mark.

In addition, if cutting is performed without a separate film, since the optical fiber is formed in a cylindrical shape, accurate sintering of 45 degrees can not be performed, and the optical fiber may be broken. If the adhesive force of the support part 300 is retained, there is a problem that the holder 100 is broken. This problem can be solved by the technique proposed by the present invention.

12 is a board unit 500 included in the optical module.

The board unit 500 includes an alignment groove 510, an optical active element 520, an electronic active element 530, and an electronic passive element 540. The electronic passive element, the electronic active element and the optically active element are packaged (die bonding, wire bonding, soldering, etc.) on the board part 500 by pick-and-place method which is advantageous for mass production.

The alignment trench 510 corresponds to the optical fiber holder alignment groove 310 and the two grooves can be coupled to the optical fiber holder 100 and the board portion 500 using the alignment pins 610. (Fig. 13)

The spacer 600 is attached to the upper part of the board unit 500 and the optical fiber holder 100 that has been manufactured is fitted to the alignment groove 310 of the board with the alignment pin 610 and fixed using epoxy or the like. When combined, the alignment mark has a form that can be finally confirmed using a vision.

Once the fixation is complete, the alignment pins can be removed. The height of the board is an important consideration in optical module (thinning trend) these days. Though it is possible to manufacture a thin photoelectric module directly on the board (CoB) Optical alignment is an important issue in the fabrication of photoelectric modules, which can be done quickly and easily, which is advantageous for mass production. Also, in the case of a photoelectric module using a plurality of optical fibers, the above advantages can be maintained. Therefore, the present invention can be applied to various types of photoelectric modules.

As a result, in the case of the present invention, the ends of a plurality of optical fibers can be configured to have an angle of 45 degrees, and at the same time, the optical module can be mounted without being separated at a precise position of the board.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

100 optical fiber holder
110 Fiber-Optic Mounting Holes
120 alignment mark
130 Alignment groove
200 optical fiber
300 support
310 film portion
400 sawing device
410 cutting edge
500 board section
510 alignment groove
520 optical active element
530 Electronically active element
540 Electronic Passive Components
600 Spacer

Claims (13)

delete delete An end-point forming apparatus for an optical fiber having a predetermined angle,
An optical fiber mounting groove capable of positioning at least one optical fiber;
An optical fiber holder including the optical fiber mounting groove;
A support portion on which the optical fiber holder is located;
Wherein the at least one optical fiber is longer than the optical fiber holder and protrudes to one side of the optical fiber holder;
A cutting portion including a cutting edge having a first angle, the cutting portion being spaced apart from the protruding optical fiber by a predetermined distance and rotating;
Wherein the optical fiber mounting groove is formed on an upper surface of the optical fiber holder in a longitudinal direction and is positioned on the upper surface of the support so that the upper surface of the optical fiber holder is bottomed, The end of the optical fiber has the predetermined angle,
The optical fiber holder further comprising an alignment mark,
Characterized in that after positioning the optical fiber holder on the supporting part, the alignment mark is confirmed by using a sensing device, and the cutting part is moved by the predetermined distance from the alignment mark, and the at least one optical fiber is cut off Of the optical fiber.
delete The method of claim 3,
Further comprising a fixing member for fixing at least a part of the protruding optical fiber after positioning the optical fiber holder on the upper surface of the supporting portion.
The method of claim 3,
Wherein the first angle is 90 degrees and the predetermined angle is 45 degrees.
A method of forming an end of an optical fiber having a predetermined angle,
Placing at least one optical fiber protruding from one surface of the optical fiber holder in an optical fiber holder including an optical fiber mounting groove on an upper surface capable of positioning at least one optical fiber;
Fixing the optical fiber disposed in the positioning step;
Positioning the optical fiber holder upside down on a support;
And cutting the optical fiber disposed in the positioning step using a cutting portion including a cutting edge having an end of a first angle,
The optical fiber holder further comprising an alignment mark;
Capturing a position of the alignment mark after positioning the optical fiber holder in an inverted position;
Further comprising the step of using a cutting portion at a predetermined distance from the position of the alignment mark.
8. The method of claim 7,
Further comprising the step of fixing the optical fiber disposed in the step of positioning the optical fiber holder with the fixing member after the optical fiber holder is turned upside down on the support part.

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