WO2016180071A1

WO2016180071A1 - Coupled connecting method for optical wave guide plate and optical fibers， optical wave guide plate and telecommunication transmission system

Info

Publication number: WO2016180071A1
Application number: PCT/CN2016/074707
Authority: WO
Inventors: 赵丽; 庞拂飞; 王廷云; 邓传鲁; 朱涛; 贾娜娜; 王玉; 刘哲
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-05-08
Filing date: 2016-02-26
Publication date: 2016-11-17
Also published as: CN106199832B; CN106199832A

Abstract

A coupled connecting method for an optical wave guide plate and optical fibers (10), an optical wave guide plate and a telecommunication transmission system. A connecting groove (8) is formed in the optical wave guide plate by processing; the bottom of the groove (8) comprises a core layer (2) of an optical waveguide; and connecting ends of the optical fibers (10) are in embedded connection with the groove (8), so that core layers of the optical fibers (10) are butted against the core layer (2) of the optical waveguide.

Description

Optical waveguide board and optical fiber coupling connection method, optical waveguide board and communication transmission system

Technical field

The present invention relates to the field of communications, and in particular, to a method for coupling an optical waveguide board to an optical fiber, an optical waveguide board, and a communication transmission system.

Background technique

The rapid development of broadband communications, supercomputers and big data centers continues to drive the rapid growth of information transmission bandwidth. The limitations of traditional electrical interconnection technologies in terms of bandwidth, distance, and energy consumption are becoming more and more prominent. The transmission bandwidth is 10 Gbps. Electrical interconnection technology can only achieve information transmission from 0.3m to 1m, but there is no way for high-speed interconnections such as 25Gbps and 40Gbps. In recent years, optical printed backplane interconnection technology based on optical waveguide theory has been gradually developed, and it has been widely studied at home and abroad, and is expected to be fully applied and promoted in the next few years. Compared with electrical interconnect technology, optical printed backplane interconnect technology has outstanding advantages in data transmission, green energy saving, manufacturing cost and interconnection density, between daughter board and backplane, between high speed chips, and high speed chip. The application between it and mass storage has great potential and will promote the promotion of technologies in emerging fields such as “triple play”, “mobile internet”, “Internet of Things” and “cloud computing”. At present, research hotspots of optical interconnect technology, one is the improvement of the transmission performance of the light guide plate preparation, and the second is the optical waveguide-fiber coupling connection technology.

In the optical printing backplane transmission system, the coupling performance of the optical waveguide-fiber plays a very important role in the stable operation of the transmission system. The factors affecting the optical waveguide-fiber coupling connection are mainly the smooth end of the optical fiber and optical waveguide. Degree, longitudinal deviation, axial deviation and angular deviation of optical waveguide-fiber coupling, the long-term operation of the optical fiber, the end face of the optical waveguide is susceptible to pollution, and the optical waveguide-fiber connection pair caused by external forces such as vibration and collision Quasi-bias, etc., these factors will increase the transmission loss of the optical waveguide to a certain extent, thus reducing the stability of the transmission system to some extent.

At present, there are many applications of coupling technology. The coupling technology is generally realized by the fiber-optic connection technology which is very mature in the field of communication technology. The fiber jumper commonly used for optical waveguide-fiber connection coupling generally has an MPO interface and an MT-RJ interface. The step of coupling the package is generally: first, using a laser to etch a square groove on a 12-channel side of the optical waveguide backplane for packaging, the spacing of the square slots can be placed into the guide inserted on the fiber jumper connector. The needle precisely adjusts the alignment accuracy of the optical fiber and the optical waveguide by means of the 6-dimensional adjustment frame, and then uses the ultraviolet glue to cure the guide pin in the groove, and also needs the colloid curing adapter, so that the optical fiber connector is fixed to the card. Because it is fixed by using the guide pin process, it is more susceptible to external forces such as vibration and collision, which may cause misalignment of the optical waveguide-fiber, and thus affect the stable operation of the optical interconnect backplane transmission system.

Summary of the invention

The main technical problem to be solved by the embodiments of the present invention is to provide a method for coupling an optical waveguide board and an optical fiber, an optical waveguide board, and a communication transmission system, which solves the problem that the optical waveguide board and the optical fiber are poorly aligned in the prior art, thereby causing communication. Poor transmission stability during transmission.

To solve the above problem, the technical solution adopted by the embodiment of the present invention is as follows:

In a first aspect, an embodiment of the present invention provides a method for coupling an optical waveguide board to an optical fiber, including:

Forming a connecting groove on the optical waveguide plate, the bottom of the groove containing the core layer of the optical waveguide;

Embedding the fiber connection end into the connection groove allows the core layer of the optical fiber to interface with the core layer of the optical waveguide.

In an embodiment of the invention, the processing the forming the connecting groove on the optical waveguide plate comprises: determining a processing region on the optical waveguide plate, the processing region including the core layer of the optical waveguide; The processing area is to be processed to form a groove parameter of the connecting groove; the groove parameter comprises a groove shape; and the corresponding connecting groove is processed in the processing area according to the determined groove parameter of the connecting groove.

In an embodiment of the invention, the processing of forming the corresponding connecting groove in the processing region according to the determined groove parameter of the connecting groove comprises: first injecting a laser beam into the quartz lens, and obtaining a shape through the quartz lens. a spot matching the shape of the groove of the connecting groove, and then obtaining an etching spot having a shape conforming to a shape of the groove of the connecting groove through the pupil, and etching through the etching spot in the processing region Corresponding connection groove.

In an embodiment of the invention, after the connecting groove is formed on the optical waveguide plate, the fiber connecting end is embedded in the connecting groove, and the method further comprises: scanning the bottom surface of the connecting groove formed by the laser beam Eclipse treatment.

In an embodiment of the present invention, the embedding the fiber connection end into the connection groove to interface the core layer of the optical fiber with the core layer of the optical waveguide comprises: forming a connection groove on the optical waveguide plate Immediately thereafter, the fiber connection end is embedded in the connection groove to interface the core layer of the optical fiber with the core layer of the optical waveguide.

In an embodiment of the present invention, after the fiber connecting end is embedded in the connecting groove to interface the core layer of the optical fiber with the core layer of the optical waveguide, the method further includes: adding a core layer glue to the The core layer of the optical waveguide is thermally cured in a gap with the core layer of the optical fiber.

In an embodiment of the present invention, after the core glue is added dropwise to the optical waveguide and the optical fiber gap, after the thermal curing, the method further comprises: adding a cladding adhesive to cover the connecting groove to perform heat curing. .

In a second aspect, an embodiment of the present invention further provides an optical waveguide board, including:

The optical waveguide plate has a connecting groove, and the bottom of the connecting groove includes a core layer of the optical waveguide plate, and the connecting groove is used for receiving the fiber connecting end.

In a third aspect, an embodiment of the present invention further provides a communication transmission system including an optical waveguide board and an optical fiber:

The optical waveguide plate has a connecting groove, and the bottom of the groove includes a core layer of the optical waveguide;

The connecting groove receives the fiber connecting end, and a core layer of the optical fiber interfaces with a core layer of the optical waveguide.

In an embodiment of the present invention, the method further includes: a core layer of the optical waveguide and a core layer of the optical fiber have a cured core glue in a gap between the core layers, and the core layer of the optical waveguide and the optical fiber The core layer is in close contact.

In an embodiment of the invention, the method further includes: the recessed cavity further comprises a cured cladding glue for fixing the optical fiber and the optical waveguide.

The beneficial effects of the embodiments of the present invention are:

The optical waveguide board and the optical fiber coupling connection method, the optical waveguide board and the communication transmission system provided by the embodiments of the present invention form a connection groove on the optical waveguide board, and the bottom of the groove includes a core layer of the optical waveguide, and the optical fiber connection end is embedded in the connection concave. The slot interfaces the core layer of the optical fiber with the core layer of the optical waveguide. Compared with the prior art, instead of inserting the grooves on both sides of the core layer of the optical waveguide by the guide pins, the core layer of the optical fiber is butted against the core layer of the optical waveguide, and the connection groove is formed on the optical waveguide plate. The groove directly receives the fiber connecting end, so that the core layer of the optical fiber directly interfaces with the core layer of the optical waveguide plate, and can be accurately aligned for connection, and is not easily affected by environmental external forces such as vibration and collision, and can improve the core layer of the optical fiber. The alignment accuracy of the core layer of the optical waveguide plate improves the transmission stability during communication transmission. Moreover, it is not necessary to have a connecting pin with a fiber connecting end, which can make the fiber connecting end simple to process, reduce the cost, and improve the core competitiveness of the product.

DRAWINGS

1 is a schematic flow chart of a method for coupling and coupling an optical waveguide board and an optical fiber according to Embodiment 1 of the present invention;

2 is a schematic flow chart of a method for coupling and coupling an optical waveguide board and an optical fiber according to Embodiment 2 of the present invention;

3 is a schematic flow chart of a method for coupling and coupling an optical waveguide board and an optical fiber according to Embodiment 3 of the present invention;

3-1 is a schematic diagram of a printed circuit board having a prepared optical waveguide transmission layer according to Embodiment 3 of the present invention;

3-2 is a schematic view showing a square groove of an excimer laser provided on an end face of an optical waveguide according to Embodiment 3 of the present invention;

3-3 is a schematic diagram of a laser beam conversion device according to Embodiment 3 of the present invention;

3-4 is a schematic view showing further processing of the processed square groove provided by the third embodiment of the present invention;

3-5 are schematic diagrams showing the operation of accurately aligning optical fibers of an optical waveguide board by using a 6-dimensional adjustment frame according to Embodiment 3 of the present invention;

3-6 are schematic diagrams showing the core layer glue of the optical fiber plate end face gap which has been precisely adjusted according to the third embodiment of the present invention;

3-7 is a schematic view showing the curing and encapsulation of a square groove drop-cladding adhesive by using a capillary needle tube according to the third embodiment of the present invention;

3-8 are schematic structural views of a connection groove provided in the inner region of the optical waveguide plate according to Embodiment 3 of the present invention;

3-9 are schematic diagrams showing the structure of the connection groove provided in the inner region of the optical waveguide plate according to the third embodiment of the present invention;

4 is a schematic structural view of an optical waveguide board according to Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of a communication transmission system according to Embodiment 3 of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1

The optical waveguide board and the optical fiber coupling connection method of this embodiment, as shown in FIG. 1, includes the following steps:

Step S101: processing a connecting groove on the optical waveguide plate, the bottom of the groove containing a core layer of optical waveguide;

In this step, the optical waveguide plate refers to a printed circuit board that also transmits the optical waveguide transmission layer, which should be understood as Various existing circuit boards including an optical waveguide transmission layer are included. Processing on the existing optical waveguide plate, that is, processing a connection groove formed around the core layer and the core layer of the optical waveguide plate, and the bottom of the connection groove should include a core layer of the optical waveguide, so that the optical fiber is embedded in the connection concave The core layer of the optical fiber is docked with the core layer of the optical waveguide. Further, in order to facilitate the precision of the interface between the core layer of the optical fiber and the core layer of the optical waveguide, it is preferable that the connection groove is larger than the connection end of the optical fiber to facilitate the precision adjustment of the docking.

Step S102: inserting the fiber connecting end into the connecting groove to interface the core layer of the optical fiber with the core layer of the optical waveguide.

In this step, since the bottom of the connecting groove includes the core layer of the optical waveguide, when the optical fiber is embedded, the connecting end of the optical fiber should be docked with the bottom of the connecting groove, thereby allowing the core layer of the optical fiber to interface with the core layer of the optical waveguide. . In order to better connect the core layer of the optical fiber to the core layer of the optical waveguide, the connection portion of the optical fiber can be further adjusted to make the core layer of the optical fiber and the core layer of the optical waveguide interface accurately. Because the two ends of the guide pin are not fixed, the connector of the optical fiber is directly embedded in the connection groove, which is flexible and easy to adjust, so that the core layer of the optical fiber and the core layer of the optical waveguide are highly connected.

Specifically, in the above step S101, forming a connection groove on the optical waveguide plate may be determining a processing region on the optical waveguide plate, the processing region includes a core layer of the optical waveguide; and determining that the connection groove is to be processed in the processing region The groove parameter; the groove parameter includes a groove shape; and the corresponding connection groove is formed in the machining region according to the determined groove parameter of the connection groove. It is worth noting that the groove parameter here refers to the specific parameters of how to process the groove. For example, the shape of the groove, specifically, the groove shape is capable of accommodating the connection end of the optical fiber. Preferably, the groove is formed to coincide with the connection end of the optical fiber, which is slightly larger. Of course, the groove parameter may also include the thickness of a specific groove or the like.

Specifically, in order to obtain a desired connecting groove, according to the determined groove parameter of the connecting groove, a corresponding connecting groove is formed in the processing region, and the laser beam may be first incident on the quartz lens, and the shape and connection are obtained through the quartz lens. The spot shape of the groove matches the spot, and then the light is captured. An etching spot having a shape conforming to the shape of the groove connecting the grooves is formed by etching the spot in the processing region to form a corresponding connecting groove. It should be noted that the method for obtaining an etched spot corresponding to the shape of the groove connecting the grooves is merely a specific embodiment, and it should be understood that the existing one can obtain the shape of the groove corresponding to the connecting groove. Etching spot methods are all included in the present invention.

In the process of connecting the optical waveguide plate and the optical fiber, the smoothness of the butt end face has a great influence on the coupling loss after the subsequent connection, and in order to further reduce the coupling loss after the subsequent connection, a connection concave is formed on the optical waveguide plate. After the slot is inserted into the connecting groove, the method further comprises: etching the bottom surface of the connecting groove formed by the laser beam. After this treatment, the smoothness of the bottom surface of the connecting groove can be improved, that is, the smoothness of the core layer at the bottom of the connecting groove can be improved, and the coupling loss after the docking can be reduced. It is to be noted that the method of the etching treatment herein is merely a specific embodiment, and it should be understood that the existing methods for smoothing the end face of the core layer connecting the bottom surface of the groove are included in the present invention.

If the end face of the connecting layer, that is, the end face of the connecting groove and the end face of the optical fiber are exposed to the air, the end faces of the optical fiber and the optical waveguide are susceptible to dust pollution in the air for a long time, further aggravating the scattering loss, and finally affecting the optical interconnect backplane transmission system. Stable operation, then in order to avoid this situation, preferably, the fiber connecting end is embedded in the connecting groove to make the core layer of the optical fiber and the core layer of the optical waveguide include: connecting the optical fiber immediately after processing the connecting groove on the optical waveguide plate The end is embedded in the connection groove to interface the core layer of the optical fiber with the core layer of the optical waveguide. It should be noted that the connection method immediately after processing the connection groove is only a specific embodiment, and it should be understood that the existing end face of the core layer end face of the groove and the end face of the fiber connection end are protected from the air. Methods of contamination by external factors are included in the present invention.

Since the tightness of the core layer of the optical fiber and the core layer of the optical waveguide have a great influence on the coupling loss, in order to improve the close connection between the core layer of the optical fiber and the core layer of the optical waveguide, the optical fiber connection end can be embedded in the connection groove to make the optical fiber. After the core layer is butted against the core layer of the optical waveguide, the core layer is added to the optical waveguide. The core layer and the core layer of the optical fiber are thermally cured in abutting gap. In this way, the mating of the core layer of the optical fiber and the core layer of the optical waveguide can be improved, thereby reducing the coupling loss, and the stability of the subsequent transmission can be improved. It should be noted that the method of dropping the core layer by the method here is only a specific embodiment, and it should be understood that the existing methods for improving the close connection between the core layer of the optical fiber and the core layer of the optical waveguide are included in the prior art. Within the invention.

Further, in order to avoid the influence of external forces such as vibration and collision after the docking is accurate, the alignment of the core layer of the optical waveguide and the optical fiber may be deviated, and the chemical reaction caused by the connection of the groove by other colloidal packages may be avoided (encapsulation glue and cladding glue). The disadvantage of the chemical reaction of the core layer glue is that the core layer glue is added to the gap between the optical waveguide and the fiber, and after the heat curing, the method further comprises: adding a cladding glue to cover the connection groove for thermal curing. It is to be noted that the method of applying the coating gel by dropping is merely a specific embodiment, and it should be understood that the existing methods as long as the above effects can be achieved are included in the present invention.

Embodiment 2

The optical waveguide board and the optical fiber coupling connection method of the embodiment of the present embodiment, the method in this example is specifically as shown in FIG. 2, and includes the following steps:

Step S201: preparing a printed circuit board comprising an optical waveguide transmission layer, that is, an optical waveguide plate;

In this step, the prepared optical waveguide plate in the step has a core layer size of 50 μm×50 μm, an upper cladding layer and a lower cladding layer thickness of 50 μm, or the core layer, the upper cladding layer and the lower cladding layer of the optical waveguide. It is not limited to the above dimensions.

Step S202: using a laser to write a rectangular groove on the prepared end face of the optical waveguide plate;

In this step, specifically, the parameters such as exposure energy, dot frequency, stepping speed, and the like may be set on the working software of the laser, and then laser etching is performed; it should be understood that the laser energy must be determined in advance when the laser is written. Processing time and its stepping speed. It should be noted that the rectangular groove here is a kind of connection groove, and the shape configuration of the specific connection groove is determined according to a specific case.

Step S203: further processing is performed on the processed rectangular groove;

In this step, the processing is mainly performed to reduce the end face roughness of the optical waveguide plate. It can be treated by annealing, but the annealing temperature and annealing time should be accurately determined. It can also be treated by the thermal effect of CO2 laser. The specific method is to accurately control the CO2 laser to etch back the groove to reduce the groove roughness. Wait.

Step S204: precisely adjusting the 6-dimensional adjustment frame, embedding the optical fiber into the rectangular slot, and precisely aligning the optical fiber and the optical waveguide;

In this step, when the 6-dimensional adjustment frame is adjusted to align the optical waveguide-plate with the optical fiber, it needs to be displayed in real time by means of a transmission system (composed of a light source, an optical backplane sample, a power meter and its connecting fiber) to display its loop loss. When the loop loss reaches the minimum, the alignment of the optical waveguide plate and the optical fiber is optimal.

Step S205: under the microscope, the core layer glue is added to the gap between the optical waveguide plate and the optical fiber by using a capillary needle tube to perform heat curing to achieve good adhesion;

Step S206: covering the entire rectangular groove with a capillary needle and a cladding glue to perform heat curing, and completing the entire process of curing the package.

It is worth noting that in the steps S205 and S206, when the core layer and the cladding glue are dropped, a microscope is required to precisely control the flow rate and the dispensing position.

Compared with the existing parallel coupling technology, the invention has the following advantages and features: the method of the embodiment has the advantages that the connector is simple and easy to manufacture, has high preparation efficiency, and can be mass-produced; and the micro-machining technology is skillfully applied to the optical waveguide board. In the parallel coupling technology with the optical fiber, the alignment deviation of the optical waveguide-fiber connection caused by the external force such as vibration and collision is overcome, and the bad condition that the end face of the connector is exposed to the air for a long time is vulnerable to dust pollution, and finally Achieve stable and reliable operation of the optical interconnect transmission system for a long time; and the package of the connector is cured with a cladding glue to avoid the disadvantage of chemical reaction caused by curing with other colloidal packages, further protecting the connector and using other colloidal packages. Due to the different physicochemical properties of the material, the groove can be clearly seen under the microscope. Imprint, and the package described in this article is solidified, there is no obvious groove imprint; the preparation method is simple and easy, high efficiency, and overall reduces the production cost.

It should be noted that the application of the method of this embodiment is not limited to the parallel coupling of the optical fiber and the optical waveguide plate, and can also realize the vertical coupling between the optical fiber and the optical waveguide plate. For example, the optical fiber is vertically inserted into the groove, but the end face of the fiber is processed into a 45-degree inclined surface, and the inclined surface is plated with a high reflection film. When the optical waveguide is vertically coupled, the inclined surface faces the outer direction of the end face of the optical waveguide, and the signal light can be vertically reflected through the inclined surface. The optical waveguide is transmitted; or the optical waveguide requires a vertical region to prepare a grating coupler, and the upper cladding of the grating coupler is written with a groove, the thickness of the groove cannot exceed the thickness of the upper cladding, and the optical fiber is vertically inserted into the groove. After curing, the signal light transmitted by the optical fiber is vertically coupled into the optical waveguide through the grating coupler for transmission.

Embodiment 3

The method for coupling the optical waveguide plate and the optical fiber of the embodiment of the present embodiment mainly uses a laser to etch a rectangular groove on the end surface of the prepared optical waveguide, and the rectangular groove is a type of connecting groove, and the specific shape can be According to the specific situation, the optical fiber is embedded in the rectangular groove to realize the butt coupling, and finally the waveguide rubber is used for curing and encapsulation, thereby realizing the parallel coupling of the optical waveguide-fiber. The method subtly applies the micro-machining technology to the parallel coupling technology of the optical waveguide plate and the optical fiber, overcomes the alignment deviation of the optical waveguide-fiber connection caused by external forces such as vibration and collision, and avoids the long-term exposure of the connector. The end face of the air is vulnerable to dust pollution, and finally achieves stable and reliable operation of the optical interconnect transmission system for a long time.

The method in this embodiment takes an optical waveguide material as an example. The optical waveguide has a feature size of 50 μm×50 μm and a transmission light wavelength of 850 nm. The method in this example is specifically shown in FIG. 3 and includes the following steps:

Step S301: Referring to FIG. 3-1, the printed circuit board containing the optical waveguide transmission layer, that is, the optical waveguide board, has an upper cladding layer 1 and a lower cladding layer 3 having a thickness of 50 μm, and the core layer 2 has a rectangular shape and a size of 50 μm × 50 μm;

Step S302: Referring to FIG. 3-2, the laser beam 4 emitted by the CO2 laser passes through a transforming device to obtain a spot of a desired shape. First, the CO2 laser beam is incident on the quartz lens 5, and the rectangular lens is sized and etched through the quartz lens. a size-matched spot, and then through the aperture 6 to obtain a rectangular spot 7 of the same size as the rectangular groove size;

Step S303: Referring to FIG. 3-3, the laser etches the rectangular groove 8 on the end surface of the optical waveguide, and sets parameters such as energy, frequency, and step speed of the laser working software, so that the spot size required for etching the rectangular groove can be obtained;

Step S304: Referring to FIG. 3-4, the processed rectangular groove is further processed, and the specific method may be to etch the end surface 8 of the rectangular groove by using the laser beam 9 multiple times.

Step S305: Referring to Figures 3-5, the 6-dimensional mount 11 is precisely adjusted to embed the optical fiber 10 into the rectangular recess and precisely align the optical fiber and the core layer of the optical waveguide.

Step S306: Referring to FIG. 3-6, under the microscope, the core layer glue 13 is added to the gap between the optical waveguide plate and the optical fiber by using the capillary tube 12, and then thermally cured, so that the optical waveguide plate and the optical fiber are well adhered. The role of the microscope can control the accuracy of the working point, and the role of the capillary tube is to accurately control the amount of core glue to achieve a good intensive effect.

Step S307: Referring to FIG. 3-7, under the microscope, the entire rectangular groove is covered by the capillary tube 12 and the cladding adhesive 14 is applied, and then the heat curing is performed to complete the entire process of curing the package.

So far, the process of embedding the optical fiber into the groove of the end face of the optical waveguide to realize parallel coupling has been completed.

In this embodiment, the thickness of the under cladding layer, the core layer, and the over cladding layer is determined by the optical waveguide material used and the wavelength of light to be transmitted.

In the present embodiment, the fabrication process of the printed circuit board including the optical waveguide transmission layer can be performed by a prior art, such as a doctor blade method, a hot stamp embossing method, or the like.

Further, the present invention may also have other application scenarios, for example, the groove of the optical waveguide is not placed on the end surface, but in the area inside the board, see FIG. 3-8, the prepared optical waveguide transmission layer is provided. In the printed circuit board, the upper cladding layer 1 and the lower cladding layer 3 have a thickness of 50 μm, and the core layer 2 has a rectangular shape with a size of 50 μm × 50 μm. The groove 4 is a groove made of a CO2 laser, the groove size is matched with the optical fiber 10, and the groove 4 is subjected to laser etching treatment. Accurately adjust the 6-dimensional adjustment frame 11 so that the optical fiber 10 is embedded in the rectangular groove, and the core layer of the optical fiber and the optical waveguide are precisely aligned. Under the microscope, the core layer glue 13 is dropped by the capillary tube 12 to the optical waveguide-fiber gap. In the middle, thermal curing is performed to achieve good adhesion of the optical waveguide-fiber. Referring to Figure 3-9, under the microscope, the entire rectangular groove is covered with a capillary tube 12 and a cover rubber 14 is applied, and then the heat curing is completed to complete the entire process of curing the package. At this time, the appearance of the fiber will be a tail. The form comes out of the board.

It should be noted that in this embodiment, an optical fiber is taken as an example, and multiple optical fibers may be coupled to the optical waveguide at the same time to form a multi-channel optical path connection. In order to improve the positioning accuracy, the design of the positioning guide pin can be increased. For example, two positioning guide pin holes are added at both ends of a row of optical waveguides, but this depends on the specifications of the supporting optical fibers. The method of coupling the optical waveguide plate and the optical fiber in the embodiment is adopted, and the method idea is to combine the micro-machining technology and the connector preparation, which is characterized in that the digital processing by the laser is simple, efficient, reliable, and can be batch-generated. Overall, the production cost is reduced. The method for dropping core layer glue and cladding glue by capillary needle tube is characterized in that the preparation process is simple and the efficiency is high, and only the alignment degree of the capillary tube and the square groove and the amount of glue can be precisely controlled under the microscope. . The aligned optical waveguide plate and the optical fiber connector have been adjusted, and the gap is glued to the core layer to reduce the scattering loss; the entire connector is cured by the cladding glue, and the biggest advantage is that it is firm and reliable, and overcomes the vibration and collision. The alignment deviation caused by the external force of the environment also avoids the influence of air dust on the end face of the connector head, and the transmission system can operate reliably for a long time. At the same time, the use of the cladding glue can avoid the use of other colloidal package rectangular slots. The disadvantages of the chemical reaction (the chemical reaction between the encapsulant and the cladding rubber and the core rubber) further protect the connector. With other colloidal packages, the groove marks can be clearly seen under the microscope due to the different physicochemical properties of the materials, and there is no obvious groove mark when the package is cured.

Embodiment 4

The embodiment provides an optical waveguide plate 400, as shown in FIG. 4, comprising: a connecting groove 401 on the optical waveguide plate, the bottom of the connecting groove includes a core layer of the optical waveguide plate, The connecting groove is for receiving the fiber connecting end.

The embodiment further provides a communication transmission system, as shown in FIG. 5, comprising an optical waveguide plate 400 and an optical fiber 500: the optical waveguide plate has a connection groove, and the bottom of the groove includes the core layer of the optical waveguide The connecting groove receives the fiber connecting end, and the core layer of the optical fiber is docked with the core layer of the optical waveguide. Further, the method further includes: a core layer of the optical waveguide and a core layer of the optical fiber having a cured core layer in a gap between the core layer and the core layer of the optical fiber for bonding the core layer of the optical waveguide to the core layer of the optical fiber. The method further includes: the recessed cavity further includes a cured cladding glue for fixing the optical fiber and the optical waveguide.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the invention. It should be understood by those skilled in the art that the present invention may be modified or equivalently substituted without departing from the spirit and scope of the invention.

Industrial applicability

In the embodiment of the present invention, a connection groove is formed on the optical waveguide plate, and the core layer of the optical waveguide is included in the bottom of the groove, and the fiber connection end is embedded in the connection groove to make the core layer of the optical fiber abut the core layer of the optical waveguide. Compared with the prior art, it is not inserted into the groove on both sides of the core layer of the optical waveguide by the guide pin. The core layer of the optical fiber is butted against the core layer of the optical waveguide, but is formed on the optical waveguide plate to form a connecting groove, and the groove directly receives the fiber connecting end, so that the core layer of the optical fiber directly interfaces with the core layer of the optical waveguide plate It can be accurately aligned for connection, and is not easily affected by environmental external forces such as vibration and collision, and can improve the alignment precision of the core layer of the optical fiber and the core layer of the optical waveguide plate, thereby improving transmission stability during communication transmission. Moreover, it is not necessary to have a connecting pin with a fiber connecting end, which can make the fiber connecting end simple to process and improve the core competitiveness of the product.

Claims

A method for coupling an optical waveguide board and a fiber, comprising:

Forming a connecting groove on the optical waveguide plate, the bottom of the groove containing the core layer of the optical waveguide;

Embedding the fiber connection end into the connection groove allows the core layer of the optical fiber to interface with the core layer of the optical waveguide.
The optical waveguide board and optical fiber coupling connection method according to claim 1, wherein the processing of forming the connection groove on the optical waveguide plate comprises: determining a processing region on the optical waveguide plate, the processing region including the optical waveguide a core layer; and determining a groove parameter to be processed to form a connection groove in the processing region; the groove parameter includes a groove shape; and processing is formed in the processing region according to the determined groove parameter of the connection groove Connection groove.
The optical waveguide board and the optical fiber coupling connection method according to claim 2, wherein the processing of the corresponding connection groove in the processing region according to the determined groove parameter of the connection groove comprises: first injecting a laser beam into a quartz lens obtained by a quartz lens to obtain a spot shape matching the groove shape of the connecting groove, and then obtaining an etching spot having a shape conforming to a groove shape of the connecting groove through the aperture, and passing the etching spot Corroding is formed in the processing region to form a corresponding connecting groove.
The optical waveguide board and the optical fiber coupling connection method according to claim 3, wherein after the connecting groove is formed on the optical waveguide plate, the optical fiber connecting end is embedded in the connecting groove, and further comprises: forming by a laser beam pair The bottom surface of the connecting groove is subjected to a scouring process.
The optical waveguide board and the optical fiber coupling connection method according to any one of claims 1 to 4, wherein the embedding the optical fiber connection end in the connection groove to interface the core layer of the optical fiber with the core layer of the optical waveguide comprises: Immediately after processing the formation of the connection groove on the optical waveguide plate, the fiber connection end is embedded in the connection groove to interface the core layer of the optical fiber with the core layer of the optical waveguide.
The optical waveguide board and optical fiber coupling and connecting method according to any one of claims 1 to 4, After the optical fiber connection end is embedded in the connection groove to interface the core layer of the optical fiber with the core layer of the optical waveguide, the method further includes: adding a core glue to the core layer of the optical waveguide and the The core layer of the optical fiber is thermally cured in the butt gap.
The optical waveguide board and optical fiber coupling connection method according to claim 6, wherein the core layer glue is added dropwise to the optical waveguide and the optical fiber gap, and after heat curing, the method further comprises: adding a cladding adhesive covering device The connecting groove is described for thermal curing.
An optical waveguide board comprising:

The optical waveguide plate has a connecting groove, and the bottom of the connecting groove includes a core layer of the optical waveguide plate, and the connecting groove is used for receiving the fiber connecting end.
A communication transmission system comprising an optical waveguide plate and an optical fiber:

The optical waveguide plate has a connecting groove, and the bottom of the groove includes a core layer of the optical waveguide;

The connecting groove receives the fiber connecting end, and a core layer of the optical fiber interfaces with a core layer of the optical waveguide.
The communication transmission system according to claim 9, further comprising: a core layer of said optical waveguide and a core layer of said optical fiber having a cured core glue in a gap between said core layers for causing said core layer of said optical waveguide The core layer of the optical fiber is in close contact.
A communication transmission system according to claim 8 or 9, further comprising: said recessed cavity further comprising a cured cladding glue for fixing said optical fiber and said optical waveguide.