KR101992142B1 - Optical module for convergence of different service - Google Patents

Abstract

The present invention relates to an optical transceiver module including an optical transceiver, wherein the optical transceiver includes an optical transmitter including a laser diode having a first wavelength; A first lens positioned at an output end of the optical transmitter for changing the output of the optical transmitter into parallel light; An optical receiver including a photodiode for receiving a second wavelength; A second lens for focusing an optical signal input to an optical receiver for input to the optical receiver to a photodiode receiving position; A first filter for separating the first wavelength and the second wavelength; A second filter having one side coupled to an output of the first filter; A collimator having one side coupled to the other side of the second filter; A first input / output optical fiber and a second input / output optical fiber coupled to the other side of the collimator; The second filter passes an optical signal of the A wavelength band including the first wavelength and the second wavelength and reflects the optical signal of the B wavelength band different from the A wavelength band.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical module for combining heterogeneous services,

The present invention relates to an optical module, and more particularly to an optical module for combining heterogeneous services.

The market for optical transceivers for clients is growing rapidly due to the surge of large-capacity data traffic. Especially, in the case of a short distance transceiver for data center, there is a need for miniaturization and low power consumption along with an increase in capacity due to restriction of space.

The high-speed Ethernet transceiver is composed of TOSA / ROSA and the light source, PD, Mux, DeMux are packaged inside. In the case of the filter used in the past, package Methods are proposed and development is in progress.

Generally, in a commonly used wavelength division multiplexing (WDM) communication system for transmitting a large amount of information, a multi-optical signal having a plurality of wavelengths is simultaneously transmitted through a single optical fiber.

In the transmitting / receiving end of a WDM-based communication system based on such an optical fiber, an AWG (Arrayed Waveguide Grating) using an optical waveguide grating element is used to separate or combine optical signals having a plurality of wavelengths.

In particular, in recent years, there have been many researches on the direct conversion of devices that fabricate optical waveguides on a flat substrate using a planar waveguide type optical circuit (PLC) for optical signal processing such as multiplexing / demultiplexing of optical signals .

In order to fabricate such a planar optical waveguide device, an optical waveguide device is formed by depositing a layer of silica or polymer thin film on a substrate such as silicon or quartz to form a core, A light path is changed or a light intensity is controlled by using a refractive index difference of a cladding surrounding the core.

In general, it is widely used in a dense wavelength division multiplexing (DWDM) system using multiplexing (MUX) and demultiplexing (DeMUX). In this case, the optical fiber is operated through a single mode fiber, but the optical fiber for transmitting the optical signal with the optical waveguide array grating (AWG) must be aligned with each other by the optical lens.

Meanwhile, although 5G mobile communication is an issue, since the amount of data of each base station is large, it is necessary to process data using optical communication for each base station in order to process it.

1 is a view of an antenna 10 to be used in 5G mobile communication. Normally, three antennas are arranged at intervals of 120 degrees in order to cover 360 degrees. How to handle the data input of each antenna is the current concern. One alternative is to allocate each fiber to each antenna, but the cost of the system installation is the most expensive. This approach is therefore undesirable.

In addition, there are various plans to combine different services such as broadcasting or 5G in FTTH. However, such a plan requires an additional optical device and a separate space in which the optical device is installed.

As communication equipment is mostly installed in a telephone station and a base station, and the high-speed Internet etc. are developed, the number of equipment is increased and a space for installation is lacking. Therefore, there is a problem in that it is difficult to secure a space where a separate optical device is installed in a current situation in which heterogeneous services must be combined.

It is an object of the present invention to provide a plan for combining heterogeneous services and to provide an optical module therefor, and it is an object of the present invention to provide an optical module for providing a plan for combining heterogeneous services, The object of the present invention is to provide an optical device for coupling.

According to one aspect of the present invention, there is provided an optical transceiver module including an optical transceiver, a plug and connector coupled to the system, an electronic circuit, a flexible electrical connector, and a connector for optical input and output, An optical transmitter including a laser diode having a laser diode; A first lens positioned at an output end of the optical transmitter for changing the output of the optical transmitter into parallel light; An optical receiver including a photodiode for receiving a second wavelength; A second lens for focusing an optical signal input to an optical receiver for input to the optical receiver to a photodiode receiving position; A first filter for separating the first wavelength and the second wavelength; A second filter having one side coupled to an output of the first filter; A collimator having one side coupled to the other side of the second filter; A first input / output optical fiber and a second input / output optical fiber coupled to the other side of the collimator; The output of the optical transceiver is located in a direction in which the plug and connector is positioned and the electronic circuit portion is located on a lower surface of the optical transceiver and the electronic circuit portion and the optical transceiver are connected using the folded flexible electrical connection portion Wherein the electronic circuit portion includes a blank portion and the thickness of the portion of the optical transceiver where the first lens and the second lens are located is thicker than the other portion, Wherein the first and second input / output optical fibers and the second input / output optical fiber are wound on the inside of the optical T / R module and coupled to the connector, and the second filter has a first wavelength and a second wavelength, And transmits the optical signal of the A wavelength band and the optical signal of the B wavelength band different from the A wavelength band, The connectors of the new module for inputting and outputting light are opposite to each other.

In one embodiment, when the optical signal input to one of the first input / output optical fiber and the second input / output optical fiber coupled to the other side of the collimator is an optical signal of the B wavelength band, the second filter may convert the optical signal of the B wavelength band And reflects the signal so that the signal is output to an optical fiber different from the input optical fiber.

In one embodiment, the optical T / R module includes a plug and connector coupled to the system, and the plug and connector and the optical input / output connector of the optical T / R module are opposite to each other.

In one embodiment, the first input / output optical fiber and the second input / output optical fiber of the optical transceiver are pigtailed in the plug and connector direction, and the pigtailed first input / output optical fiber and the second input / output optical fiber are coupled to the connector .

In order to combine heterogeneous services, wavelength division multiplexing (WDM) is applied to provide services without collision between services.

It is possible to insert the optical fiber into a conventional optical transmission / reception module without separately configuring an optical device for coupling heterogeneous services, which is advantageous in terms of space efficiency.

Fig. 1 Operation method using a plurality of wavelengths of a plurality of antennas
Fig. 2 Structure of a conventional BiDi optical transceiver
3 Example of allocation of optical signals for a plurality of antennas
4 is a diagram illustrating an operation method using a WDM optical signal of a plurality of antennas according to the present invention.
Figure 5 is a conceptual diagram of a method for combining heterogeneous services.
6 is a schematic view of the optical transceiver of the present invention;
7 Structure of conventional BiDi optical transceiver
Fig. 8 Structure of the BiDi optical transceiver of the present invention
9 shows an example of operating a plurality of heterogeneous services

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, an optical module according to the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

The method proposed by the present invention is to apply a WDM technique of multiplexing different wavelengths to each antenna as shown in FIG. When the base station 30 transmits different wavelengths in the direction of the antenna station including a plurality of antenna units, that is, the upward direction, each antenna recognizes and receives different wavelengths, and inputs the input data to the base station 30 A method of transmitting a wavelength can be used. The method proposed by the present invention can flexibly cope with the increase in the number of antennas of the antenna station and can cover the plurality of antenna units 10 with one optical fiber 20, There is an advantage to be able to do.

The antenna station includes a plurality of antenna units, and the antenna unit includes an optical transceiver and an antenna. The optical transceiver also includes an optical transmitter, an optical receiver, and a first filter that separates optical signals of the optical transmitter and the optical receiver.

In the case of applying the WDM technique covering a plurality of antenna units 10, conventionally, only different wavelengths have been divided. However, in the case of the present invention, a BiDi module should be used to transmit a signal to one optical fiber 20, and a BiDi module (optical transceiver) is used to transmit the optical signal of the optical transmitter and the optical transmitter 110, A first filter 130 for separating the optical signal of the receiver must be included. In the case where the first filter 130 is configured to be positioned at 45 degrees, there has been a problem in that the upstream and downstream optical signals are mixed due to problems such as polarization. In order to overcome this, the wavelength had to be separated by about 60 nm. Using polarization suppression techniques, the spacing could be reduced to about 40 nm.

Therefore, in the case of the present invention, it is intended to use a wavelength plan as shown in Fig. For example, the wavelength allocated to the first antenna unit of the three antenna units 10, that is, the wavelength of the optical signal received by the optical receiver of the first antenna unit and the wavelength of the optical signal of the optical transmitter are? 1 and? 4, The wavelength interval of λ1 and λ4 should be guaranteed to be at least 40 nm or more. The wavelengths assigned to the second antenna unit are? 2 and? 5, and the wavelengths assigned to the third antenna unit are? 3 and? 6.

Since the optical signals from the base station to the antenna station come from WDM (wavelength division multiplexing) to one optical fiber 20, it is necessary to separate them into groups of input and output optical signals corresponding to the respective antenna units. That is, if? 1,? 2, and? 3 (upstream signals) are transmitted through one optical fiber 20, the incoming waves of the plurality of antenna units must be separated into the wavelengths assigned to the respective antenna units. In contrast, when an optical signal having a wavelength assigned to each antenna unit is transmitted to the base station, it is necessary to pass through a multiplexer in order to form λ4, λ5, and λ6 into a form that can be transmitted by one optical fiber 20. Thus, the antenna station must include a multiplexer 40 and a demultiplexer 40. [

Second Embodiment

In this embodiment, a structure for not using the multiplexer and the demultiplexer of the first embodiment is proposed.

If the multiplexer and the demultiplexer are provided, a separate space is required. Therefore, there is a problem that it is difficult to install the antenna in a conventional antenna station, and it is preferable for operation to use a minimum space.

Therefore, the present embodiment proposes a structure that does not use a multiplexer and a demultiplexer.

When there are three antenna units,? 1 and? 4 are allocated to the first antenna unit,? 2 and? 5 are allocated to the second antenna unit, and? 3 and? 6 are allocated to the third antenna unit.

The optical transceiver 100 includes an optical transmitter, an optical receiver, and a first filter that separates optical signals from the optical transmitter and the optical receiver. Further, the first filter and the first filter are connected to each other And a second filter including a first input / output optical fiber 181 and a second input / output optical fiber 182 on the other side.

The second filter unit is configured to transmit, to at least one optical signal (wavelengths are different from each other in the case of a plurality of optical signals) input by the first input / output optical fiber, a second input / output optical fiber 182, and in the case of an unreflected optical signal, it is transmitted to the first filter, to the optical receiver by the first filter, and receives it.

If a plurality of antenna units including the second filter unit are configured as shown in FIG. 4, a plurality of antenna units can be operated using a plurality of wavelengths without a multiplexer and a demultiplexer. The second filter unit may be configured using an etalon optical filter having a periodicity.

The optical fiber 20 is coupled to the first input / output optical fiber of the first antenna unit, the second input / output optical fiber of the first antenna unit is coupled to the first input / output optical fiber of the second antenna unit, 3 optical fiber of the third antenna unit and terminates the second input / output optical fiber of the third antenna unit.

In this way, the wavelengths as shown in Fig. 4 can be sequentially applied to the antenna portion.

The optical transceiver uses standardized and miniaturized forms of SFP, CFP4, etc. having BiDi function. The reason for this is that it is easy to construct an interface because the space can be minimized and standardized.

5 is a structure for combining heterogeneous services of the present invention.

The optical transceiver unit 100 for the first service uses at least one wavelength of the A group for transmission and reception and the optical transceiver unit 100 'for the second service uses at least one wavelength of the B group for transmission and reception .

The wavelength of the A group and the wavelength of the B group have different wavelength bands. For example, the wavelength band of the A group is 1300 nm and the wavelength band of the second service is 1500 nm.

The second filter unit 300 is used to separate and combine the wavelength band of the A group and the wavelength band of the B group. That is, when the wavelength of the group A is transmitted from the optical transceiver 100 for the first service, the wavelength is outputted from the optical transceiver 100 'for the second service in the second filter unit 300, The second filter unit 300 located on the opposite side separates the wavelength of the A group and the wavelength of the B group and transmits the optical signal of the wavelength of the B group to the optical transmitter / receiver unit 100 'for the second service, The optical signal of the wavelength of the A group is transmitted to the optical transmitter / receiver (! 00) for the first service.

The optical transceiver module including the optical transceiver for this purpose is as follows.

5 includes an electronic circuit unit 1100, an optical transceiver 100 and an electrical connection unit 1200. The optical fiber 105 serving as the output of the first filter of the optical transceiver 100 The connector 106 is processed and housed. At the other end of the optical fiber 181, an electrical connector is connected to the system portion in a plug-and-type manner. The optical fiber 107 is coupled to one side of the second filter unit 300 and the other side of the second filter unit 300 is formed with a first input / output optical fiber 181 and a second input / output optical fiber 182.

The optical transmitter / receiver module 7000 having such a structure has a disadvantage in that the second filter unit 300 needs to be separately configured, which increases the volume of the module. This is because the optical transmission / reception module 7000 has a width of about 1 cm, a size of the optical element of the optical transceiver 100, and a large loss when the optical fiber 181 is bent.

In order to solve this problem, the present invention proposes an optical transceiver including a function of a second filter part having the structure as shown in FIG. 6, and proposes a structure that can be combined with the optical transceiver module. (Fig. 7)

The output of the optical transmitter 110 turns into parallel light through the lens and is coupled to the second filter 150 via the first filter 130 and passes through the collimator 160 to the second filter 150 And is coupled to the first input / output optical fiber 181. When an optical signal having a wavelength assigned to the present optical receiver is input from the optical signal input through the first input / output optical fiber 181, the optical signal passes through the second filter and is vertically changed by the first filter, Receiver. If the optical signal input through the first input / output optical fiber 181 is an optical signal having a wavelength not assigned to the optical signal, the signal is reflected by the second filter 150 and coupled to the second input / output optical fiber 182, In the case of an optical signal having a wavelength not assigned to an optical signal input by the optical fiber 182, the optical signal is reflected by the second filter 150 and coupled to the first input / output optical fiber 181.

The first input / output optical fiber 181 is input / output for the first service and the second input / output optical fiber 182 is connected to the first input / output optical fiber of the optical transceiver for the second service.

With this structure, a compact optical transceiver can be constructed. By eliminating unnecessary components in the process, the optical transceiver can be miniaturized. However, due to the second filter 150, the collimator 160, and the optical fiber block 170, the length of the optical transceiver 100 is longer than that of the optical transceiver 100 shown in FIG. Such a change in length is difficult to accommodate in small-sized and standardized optical transmission / reception modules such as SFP, XFP, and CFP4.

In order to solve this problem, the present invention proposes a structure as shown in Fig. While the output of the optical transceiver 1000 was formerly output only in the direction of the connector, the present invention constitutes the output of the optical transceiver 1000 in the direction of the plug and connector 1300 coupled with the system portion (not shown) The first and second input / output optical fibers 181 and 182 are wound and coupled to the connector 106 of the optical T / R module 2000. In order to make the output of the optical transceiver 1000 in the direction of the plug-and-connector 2000, the electronic circuit portion 1100 is laid on the lower surface, and the electrical connection portion 1200 for supplying the electric signals and the power source is configured to be flexible, The optical transceiver 1000 is positioned on the upper side of the electronic circuit portion 1100. That is, the optical transceiver 1000 is positioned (laminated) on the upper side of the electronic circuit portion 1100. The first and second input / output optical fibers 181 and 182 preferably use an optical fiber having a low bending loss function and an optical fiber having a low bending loss function for optimal performance.

The thickness of the portion where the lens for converging light and collimating light in the direction of the first filter enters the optical transmitter and the optical receiver of the optical transceiver 1000 becomes thick and the electronic circuit portion 1100 is formed at the portion where the blank portion 1110 is formed So that it is possible to constitute an effective lamination.

In order to connect the first and second input / output optical fibers 181 and 182 to the connector portion, the termination must be a connector. Since a certain length is required in the process of making the connector, the ends of the first and second input / It is preferable to form a coupling portion into which the ferrule of the connector can be inserted and coupled to the optical transmission / reception module 2000.

FIG. 9 is an overlay structure using the optical T / R module shown in FIGS. 7 and 8. FIG. ? 1 and? 4 are assigned to the first service,? 2 and? 5 are assigned to the second service, and? 3 and? 6 are assigned to the third service.

The main optical fiber 20 is connected to the first service and is transmitted to another base station.

Each optical transceiver module includes an optical transceiver 100, which includes an optical transmitter, an optical receiver, and a first filter that separates optical signals from the optical transmitter and the optical receiver. Further, And a second filter having a first input / output optical fiber 181 and a second input / output optical fiber 182 formed on the other side thereof.

The second filter unit is connected to a second input / output optical fiber (not shown) other than the optical signal having the wavelength assigned to each service, for at least one optical signal (wavelengths are different from each other in the case of a plurality of optical signals) input by the first input / output optical fiber 182, and in the case of an unreflected optical signal, it is transmitted to the first filter, to the optical receiver by the first filter, and receives it.

The optical fiber 20 is coupled to the first input / output optical fiber of the first service, the second input / output optical fiber of the first service unit is coupled to the first service of the second service, and the third Output optical fiber of the third service, and terminates the second input / output optical fiber of the third service.

In this way, it is possible to sequentially operate the wavelengths as shown in FIG. 9 and to operate each service without collision.

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.

10 antenna unit
110 optical transmitter
120 optical receiver
130 first filter
150 second filter

Claims (4)

An optical transceiver module comprising an optical transceiver, a plug and connector coupled to the system, an electronic circuit, a flexible electrical connector, and a connector for optical input and output,
The optical transceiver includes:
An optical transmitter including a laser diode having a first wavelength;
A first lens positioned at an output end of the optical transmitter for changing the output of the optical transmitter into parallel light;
An optical receiver including a photodiode for receiving a second wavelength;
A second lens for focusing an optical signal input to an optical receiver for input to the optical receiver to a photodiode receiving position;
A first filter for separating the first wavelength and the second wavelength;
A second filter having one side coupled to an output of the first filter;
A collimator having one side coupled to the other side of the second filter;
A first input / output optical fiber and a second input / output optical fiber coupled to the other side of the collimator;
An output of the optical transceiver is located in a direction in which the plug and connector is located,
The electronic transceiver is located on a lower surface of the optical transceiver,
Wherein the electronic circuit unit and the optical transceiver are connected using the folded flexible electrical connection,
Wherein the electronic circuit portion includes a blank portion,
The thickness of the portion of the optical transceiver where the first lens and the second lens are located is thicker than the other portion,
Wherein the thick portion of the light transceiver in which the first lens and the second lens are located is located in the blank portion,
The first input / output optical fiber and the second input / output optical fiber are wound in the optical T / R module and coupled to the connector,
Wherein the second filter passes an optical signal of the A wavelength band including the first wavelength and the second wavelength and reflects the optical signal of the B wavelength band different from the A wavelength band,
The plug and connector and the optical input / output connector of the optical T / R module are opposite to each other,
Output optical fiber coupled to the other side of the collimator and the second input / output optical fiber is an optical signal of the B wavelength band, the second filter reflects the optical signal of the B wavelength band, And outputs it to an optical fiber different from the input optical fiber,
The first input / output optical fiber and the second input / output optical fiber are optical fibers having a low bending loss function,
Wherein the optical input / output connector of the optical T / R module is an LC type optical connector. delete delete delete

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