KR20160092247A - Align controller for optical transceiver module and controlling method for the same - Google Patents

Align controller for optical transceiver module and controlling method for the same Download PDF

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Publication number
KR20160092247A
KR20160092247A KR1020150012627A KR20150012627A KR20160092247A KR 20160092247 A KR20160092247 A KR 20160092247A KR 1020150012627 A KR1020150012627 A KR 1020150012627A KR 20150012627 A KR20150012627 A KR 20150012627A KR 20160092247 A KR20160092247 A KR 20160092247A
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KR
South Korea
Prior art keywords
optical fiber
photodiode
laser diode
axis
optical
Prior art date
Application number
KR1020150012627A
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Korean (ko)
Inventor
이양희
이경재
Original Assignee
한국산업기술대학교산학협력단
주식회사 에이디에스테크
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Priority to KR1020150012627A priority Critical patent/KR20160092247A/en
Publication of KR20160092247A publication Critical patent/KR20160092247A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/003—Alignment of optical elements
    • G02B7/005—Motorised alignment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers

Abstract

The present invention relates to an alignment coupling controller and a control method for an optical transceiver module, which comprises an optical fiber socket in which an optical fiber is coupled to a photodiode or a laser diode and a ball lens is formed therein, a photodiode connected to input / output ends of the optical fiber socket, An optical transceiver module having a laser diode connected to an input / output terminal of a socket, a gripper for holding the optical fiber socket to which the optical fiber is connected, a Z-axis driver for driving the gripper up and down, An XY stage for moving the XY stage on an XY axis and a Z axis driving unit for moving the Z axis drive unit vertically while moving the XY stage on the XY axis and aligning the position while moving the photodiode or the laser diode on which the diode or the laser diode is mounted, Detecting the point, The laser diode and the photodiode used in the transceiver module of the optical network can be automatically aligned and bonded and moved while moving in the XY stage of the micrometer unit, , And a plurality of peripheral devices used for alignment and coupling of the laser diode and the photodiode can be integrated into one board to realize a unified alignment and coupling operation through the integrated controller.

Description

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

[0001] The present invention relates to an alignment coupling controller and a control method for an optical transceiver module, and more particularly, to an alignment controller and a control method of an optical transceiver module, in which a laser diode and a photodiode used in a transceiver module of an optical network are automatically aligned To a coupling controller and a control method.

In general, an optical transceiver is a synthesizer of a transmitter, which means an optical transmitter, and a receiver, which is a receiver, and converts light and electricity into signals between an optical cable connecting the optical communication network and a transmission device .

The passive optical network (PON), which is advantageous in terms of installation cost and operational cost, is the most effective in the configuration of the optical subscriber network. The PON structure consists of active optical transmission / reception devices and passive branch devices without electrical equipment, In order to realize PON network, there are various connectors and a method of connecting them, but optical transceivers are used in particular.

An optical transceiver is a module that receives an electrical signal and generates an optical signal. The optical transceiver receives an optical signal and converts it into an electrical signal. The optical transceiver is responsible for the optical interface at the ends of the optical transmission system and a large-capacity router. Optical transceivers are a key component in determining the cost and performance of transmission systems.

Optical transceivers often use assembled optical connector modules connected at the factory because they require very precise connection to the optical frequencies and connections used, unlike conventional cable connections.

In the optical connector module, the wavelength of the transmission / reception signal is different. Using this feature, there is a transmission / reception signal separation mirror inside the connector, a laser diode for transmitting two or three holes in the optical connector, and a photodiode holder Heating is applied to the connector. In this process, the wavelength of the optical signal operates in micrometers, and the signal is transmitted to the lens, so that the effective area of the connection part is very limited.

Therefore, it must be precisely assembled at the time of assembly, and the transfer efficiency depends on the position of the holder in this process. Such assembly work must be precisely manufactured in micrometer units.

However, in the production site of the optical transceiver, by using a step motor type XY stage for adjusting the position, a power supply, an epoxy heating and injector, and a photometer, the worker moves manually in the X- and Y- It is in the form of manual assembly production in which it is assembled in a good position.

However, this process is manually fabricated by checking the transmission / reception efficiency with a dedicated optical power meter. For this reason, it takes a long time for the skilled worker to reach a certain product yield and the fatigue of the worker is considerable due to the nature of the precision work The turnover rate is high.

On the other hand, in the case of a laser diode, the parts and the optical fiber are automatically aligned and the equipment using the laser is used. However, in the case of the photodiode, the skilled workforce is manually aligned and bonded using the epoxy and UV curing machine have.

Depending on the type of photodiode, the method of measuring the signal of the photodiode changes, and the required measurement equipment is changed, so that several power supplies are required. However, if it is costly to have all of these equipments in one system for production, and if a skilled worker leaves or shifts, there will be a production gap due to the need for new manpower expansion and training period. do.

Also, as the optical communication speed is increased, the alignment position becomes smaller in the order of several microns from the center, so that it becomes more and more difficult to manually align. In order to overcome this problem, it is necessary to develop a controller capable of implementing an automated device.

Korean Patent No. 635375 (Transceiver module and optical bench for manual alignment)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laser diode and a photodiode for use in a transceiver module of an optical network, And to provide an alignment coupling controller and a control method of an optical transceiver module that can be bonded and assembled.

It is another object of the present invention to provide an optical transceiver module in which a plurality of peripheral devices used for alignment and coupling of a laser diode and a photodiode are integrated into a single board, A controller and a control method are provided.

According to another aspect of the present invention, there is provided an optical pickup apparatus comprising: an optical coupling unit for coupling an optical coupling unit to an input / output end of an optical fiber socket; And a laser diode connected to the input and output ends of the optical fiber socket, a gripper for holding the optical fiber socket to which the optical fiber is connected, a Z-axis driver for driving the gripper up and down, An XY stage for aligning a position of the photodiode or the laser diode on which the photodiode or the laser diode to be assembled is mounted and the mounted photodiode or the laser diode on a plane, and an XY stage for moving the XY stage on an XY axis, To detect the maximum output point It characterized in that it comprises the photodiode or the control unit for aligning the position of the laser diode.

The control unit includes a central processing unit, a main power unit, an LD driving unit for applying a current to the laser diode and driving the laser diode, a PD driver for driving the photodiode, A power control unit for measuring a voltage signal, a motion control unit for driving the XY stage and the Z-axis driving unit, and an optical fiber module connected to the photodiode or the laser diode for transmitting an optical communication signal .

An adhesive injection unit for injecting an adhesive into the photodiodes or the laser diode, which are seated on the XY stage and aligned in position, and an adhesive injection unit for injecting the adhesive into the adhesive injection unit, the XY stage, And a protective cover for covering the cover.

Here, the controller drives the optical fiber module and the LD driver to transmit an optical communication signal through the optical fiber, transmits the optical communication signal to the alignment target photodiode through the ball lens of the optical fiber socket, And the position of the photodiode is detected by measuring the generated current and voltage signal through the power meter unit.

The alignment control method of an optical transceiver module according to the present invention includes the steps of initializing a current position of an XY stage and a Z axis driving unit, a step of aligning a photodiode or a laser diode to be aligned and a coupling target, Driving the Z-axis driving unit to vertically clamp the optical fiber socket to which the optical fiber is connected by the gripper of the Z-axis driving unit, and fastening the photodiode or the laser diode to the optical fiber socket; A field searching step of detecting the position of the optical fiber by driving the LD driving unit and the PD driving unit while moving the optical fiber along the XY axis by a predetermined moving distance; A peak detecting step of detecting a peak value of the detected XY axis, A step of moving the injecting part to apply an adhesive to the aligning and coupling photodiodes or the laser diode; and a step of moving the Z-axis driving part to the position of the peak value of the stored XY axis, Detecting a peak value of the XYZ axis; and curing the adhesive after moving to the peak value of the detected XYZ axis.

According to the present invention having the above-described structure, the laser diode and the photodiode used in the transceiver module of the optical network can be accurately aligned and bonded and assembled while moving in the XY stage in the micrometer unit.

In addition, a plurality of peripheral devices used for alignment and coupling of the laser diode and the photodiode can be integrated on one board, and a unified alignment and coupling operation can be realized through the integrated controller.

In addition, the method of controlling the alignment of the optical transceiver module according to the present invention is characterized in that the position of the optical fiber is firstly detected through a field search step of detecting the position of the optical fiber by driving the LD driving part and the PD driving part while moving the XY stage , The peak value of the optical signal can be detected in the peak detection step, and the center point of the optical transceiver module can be detected quickly and accurately and assembled at this point.

1 is a perspective view showing an alignment coupling controller of an optical transceiver module according to the present invention.
2 is a side view of Fig.
3 is a front view of Fig.
4 is a view illustrating an optical transceiver module according to the present invention.
5 is a schematic diagram showing the configuration of the control unit of the present invention.
6 is a schematic view for explaining the alignment of the laser diode according to the present invention.
Fig. 7 is a view schematically illustrating alignment of a photodiode according to the present invention.
8 is a flowchart illustrating a method of controlling alignment and coupling of an optical transceiver module according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an alignment controller and a control method of an optical transceiver module according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, an alignment coupling controller 1 of an optical transceiver module according to the present invention includes an XY stage 10, a Z-axis driving unit 20, a control unit 30, an optical transceiver module 50).

The optical transceiver module 50 includes an optical fiber socket 51, a photodiode 53, and a laser diode 52 as shown in FIG. The optical fiber socket 51 is optically connected to a photodiode or a laser diode connected to the optical fiber socket, and a ball lens (not shown) is formed therein.

The optical fiber socket 51 is configured such that when the photodiode or the laser diode is aligned and assembled, the optical fiber is temporarily fastened to exchange optical signals through the optical fiber.

The photodiode 53 is provided at an input / output end of the optical fiber socket and generates and transmits an optical communication signal, which is transmitted through a ball lens of the optical fiber socket, as a current and a voltage signal.

The photodiode 53 or the laser diode 52 to be aligned and coupled with the optical transceiver module is seated in the seating portion of the XY stage 10. The XY stage 10 includes a driving motor and a guide block for driving in the X axis and a driving motor and a guide block for driving in the Y axis. And thus a duplicate description will be omitted.

A seating part 11 is provided on the upper surface of the XY stage and the photodiode or the laser diode to be assembled to the optical fiber socket is seated in the seating part.

The optical fiber socket 51 to be aligned and combined with the photodiode or the laser diode is grasped by the gripper 21 and moved up and down.

The gripper 21 is connected to the connection bracket of the Z-axis driving part 20, as shown in Figs.

The Z-axis driving unit 20 includes a driving motor, a driving block (not shown) connected to the driving motor, and a guide block (not shown) for guiding the driving block up and down, The driving block is vertically moved up and down along the guide block, and the connecting bracket is fastened to the driving block, and the gripper 21 is formed at an end of the connecting bracket.

On the other hand, a control unit 30 is provided on the XY stage and the Z-axis driving unit. The controller 30 is configured to move the XY stage on the XY axis and move the Z axis driver up and down while detecting the maximum output point to align the position of the photodiode or the laser diode.

The control unit 30 includes a central processing unit 31, a main power unit 32, a PD driving unit 35, an LD driving unit 36, a motion control unit 37, and an optical fiber module 38.

The LD driver 36 applies a current to the laser diode to drive the laser diode, and the PD driver 35 drives the photodiode. Also, the motion control unit 37 is configured to control the drive of the XY stage and the Z-axis east portion, and the optical fiber module 38 is connected to the photodiode or the laser diode and is configured to transmit an optical communication signal , And the optical fiber module in this embodiment is an SFP module.

The control unit 30 may further include a power meter unit 39 for measuring current and voltage signals generated from the photodiode. In addition, the control unit 30 may further include an input / output module 33 and a communication unit 34 and a digital signal processing unit 31a for Ethernet communication with the control unit and an external server or a computer.

Fig. 6 is a view for explaining alignment of a laser diode according to the present invention, and Fig. 7 is a view for schematically explaining alignment of a photodiode.

6 and 7, the control unit 30 drives the optical fiber module 38 and the LD driving unit 36 to transmit the optical signal generated in the laser diode 52 through the optical fiber 54 And transmits the transmitted optical communication signal to the photodiode 53 through the ball lens of the optical fiber socket 51. The position of the photodiode can be detected by measuring the current and voltage signals generated from the photodiode through the power meter unit 39 and the AMP 39a.

As a result, a plurality of peripheral devices used for alignment and coupling of the laser diode and the photodiode can be integrated on one board, and a unified alignment and coupling operation can be realized through the integrated controller.

Meanwhile, the alignment coupling controller 1 of the optical transceiver module according to the present invention is configured to not only align the positions of the photodiodes or the laser diodes, but also to be bonded to the optical fiber sockets at the aligned positions.

To this end, the alignment controller 1 may further include an adhesive injection unit 40 and a protective cover 41.

1 to 3, the adhesive injection unit 40 is configured to inject the adhesive into the photodiodes or the laser diode which are seated on the XY stage and are aligned in position.

The protective cover 41 is configured to cover the adhesive injection unit and the XY stage and the Z-axis driving unit when the adhesive is UV-cured, so that the irradiated UV is not leaked to the outside.

Hereinafter, a method of controlling the alignment and coupling of the optical transceiver module using the alignment coupling controller of the optical transceiver module having the above-described configuration will be described.

First, the current positions of the XY stage and the Z-axis driver are initialized.

Then, after moving to the working position, the photodiodes or the laser diode to be aligned and to be fitted are seated on the diode seating portion provided on the upper portion of the XY stage. Also, the optical fiber socket to which the optical fiber is coupled is gripped by the gripper of the Z-axis driving unit, and the Z-axis driving unit is driven up and down to fasten the photodiode or the laser diode to the optical fiber socket.

When the photodiode or the laser diode is fastened to the optical fiber socket, the operating condition of the laser diode or the photodiode is turned on and then moved to the starting position.

The control method according to the present invention further includes a field search step of detecting the approximate position of the optical fiber, a step of detecting a peak position of the photodiode or the laser diode for accurately detecting the center point of the photodiode or the laser diode, And the detection step.

First, in the field search step, the position of the optical fiber is detected by driving the LD driving unit and the PD driving unit while moving the XY stage along the XY axis by a predetermined moving distance.

If the measured value of the detected optical signal is so small that the position of the optical fiber can not be confirmed, the movement distance of the XY stage is compared with the designated distance to determine it. At this time, if the travel distance is larger than the designated distance, it is determined as an error of the field search and the field search is performed again after moving to the start position. If the travel distance is smaller than the specified distance, field search is performed again, It is determined whether it is confirmed.

When the position of the optical fiber is confirmed, peak detection is performed. And a peak detecting step of detecting a peak value of the XY axis of the irradiated optical signal when the position of the optical fiber is detected by the field searching step.

Then, the peak value of the detected XY axis is stored and the adhesive injection unit is moved to apply an adhesive to the alignment and bonding photodiodes or laser diodes.

Then, after moving to the position of the peak value of the stored XY axis, the peak value of the X, Y, and Z axes of the irradiated optical signal is detected while finely driving the Z axis driver up and down.

Then, after shifting to the peak value of the detected XYZ axis, the adhesive is cured to complete alignment and bonding.

Thus, the position of the optical fiber is firstly detected by detecting the position of the optical fiber by driving the LD driving unit and the PD driving unit while moving the XY stage, and then the peak value of the optical signal is detected in the peak detecting step, Yet accurately detect the center point of the optical transceiver module and can be assembled at this point.

Although several embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various modifications may be made without departing from the spirit or scope of the present invention . The scope of the invention will be determined by the appended claims and their equivalents.

1: Alignment coupling controller of optical transceiver module
10: XY stage
20: Z-axis driving part
30:
40: Adhesive injection part
50: optical transceiver module

Claims (5)

An optical transceiver module having an optical fiber socket in which an optical fiber is coupled to a photodiode or a laser diode and a ball lens is formed therein, a photodiode connected to an input / output terminal of the optical fiber socket, and a laser diode connected to an input / output terminal of the optical fiber socket,
A gripper for holding the optical fiber socket to which the optical fiber is connected,
A Z-axis driving unit for driving the gripper up and down,
An XY stage for aligning a position of the photodiode or the laser diode on which the photodiode or the laser diode to be assembled in the optical fiber socket is mounted,
And a controller for moving the XY stage on the XY axis and moving the Z axis driver up and down while sensing a maximum output point to align the position of the photodiode or the laser diode. Controller.
The apparatus of claim 1,
A central processing unit,
A main power unit,
An LD driver for applying a current to the laser diode and driving the laser diode;
A PD driver for driving the photodiode;
A power meter unit for measuring current and voltage signals generated from the photodiode,
A motion control unit for driving the XY stage and the Z-
And an optical fiber module connected to the photodiode or the laser diode for transmitting an optical communication signal.
3. The method according to claim 1 or 2,
An adhesive injection unit for injecting an adhesive into the photodiodes or the laser diode which are seated on the XY stage and whose positions are aligned,
And a protective cover covering the adhesive injection unit, the XY stage, and the Z-axis driving unit when the adhesive is UV-cured.
3. The apparatus of claim 2,
The optical fiber module and the LD driving unit are driven to transmit an optical communication signal through the optical fiber. The optical communication signal is transmitted to an alignment target photodiode through a ball lens of an optical fiber socket. The current and voltage signals And the position of the photodiode is detected by measuring the position of the photodiode through the power meter unit.
Initializing a current position of the XY stage and the Z-axis driving unit,
The Z-axis driving unit is driven up and down by holding a photodiode or a laser diode to be aligned and a coupling target on a diode seating part provided on the upper part of the XY stage, holding the optical fiber socket to which the optical fiber is connected by the gripper of the Z- Coupling the photodiode or the laser diode to the optical fiber socket,
A field search step of driving the LD driving unit and the PD driving unit while moving the XY stage along the XY axis by a predetermined moving distance to detect the position of the optical fiber,
A peak detecting step of detecting a peak value of the XY axis of the irradiated optical signal when the position of the optical fiber is detected by the field searching step;
Storing the peak value of the detected XY axis and moving the adhesive injection unit to apply an adhesive to the alignment and bonding photodiodes or laser diodes,
Detecting a peak value of an XYZ axis of the irradiated optical signal while finely driving the Z-axis driving unit up and down after moving to a position of a peak value of the stored XY axis;
And curing the adhesive after moving to a peak value of the detected XYZ axis.

KR1020150012627A 2015-01-27 2015-01-27 Align controller for optical transceiver module and controlling method for the same KR20160092247A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102025419B1 (en) * 2018-08-20 2019-09-30 주식회사 토모테크 Device for assembling semiconductor test socket

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100635375B1 (en) 2004-09-14 2006-10-17 한국전자통신연구원 The transceiver module and optical bench for passive alignment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100635375B1 (en) 2004-09-14 2006-10-17 한국전자통신연구원 The transceiver module and optical bench for passive alignment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102025419B1 (en) * 2018-08-20 2019-09-30 주식회사 토모테크 Device for assembling semiconductor test socket

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