CN209784585U

CN209784585U - Integrated optical assembly structure with isolator

Info

Publication number: CN209784585U
Application number: CN201920492043.4U
Authority: CN
Inventors: 徐俊
Original assignee: 徐俊
Current assignee: JIANGXI RUI YUAN PRECISION MANUFACTURING Co.,Ltd.
Priority date: 2019-02-28
Filing date: 2019-04-12
Publication date: 2019-12-13
Anticipated expiration: 2029-04-12
Also published as: CN210376761U; CN210199352U

Abstract

The utility model provides an integrated optical assembly structure with an isolator, which comprises a metal front cover, a ceramic sleeve, a pressing block, a ceramic ferrule and an isolator chip, wherein the ceramic sleeve is arranged in the metal front cover, one end of the ceramic ferrule is arranged in the ceramic sleeve, the other end of the ceramic ferrule is fixed in the pressing block, the pressing block is provided with a ferrule positioning hole and a chip accommodating hole, the chip accommodating hole is provided with at least two positioning angles, and the isolator chip is self-provided with magnetism, is arranged in the chip accommodating hole and is positioned and fixed by the positioning angles; the utility model discloses utilize same briquetting to press ceramic lock pin simultaneously and hold the isolator chip and set up the orientation angle in the chip accommodation hole, make isolator chip installation become an assembly by twice assembly, improved the assembly precision, reduced the assembly difficulty, make isolator chip area reduce under the condition of guaranteeing the light path full coverage, reduced material cost, promoted optical assembly's production efficiency.

Description

integrated optical assembly structure with isolator

Technical Field

The utility model belongs to the technical field of optical communication and specifically relates to indicate an integrated optical assembly structure of taking isolator.

Background

In recent years, with the increase of data transmission, the traditional electric communication cannot meet the transmission requirements of various fields, and the optical communication technology makes up for the defects of short transmission distance, large energy consumption, low transmission speed and the like of the traditional electric communication technology, and is widely applied to various data transmissions nowadays. In the optical communication module, when light enters (or exits) various optical elements or optical fibers from a light source such as a laser, part of the light is reflected or scattered at end faces or inside portions of the various optical elements or optical fibers, and the reflected or refracted light interferes with optical signals when returning through the original path, which affects signal quality and stability of optical communication. Therefore, the isolator in the optical module becomes an indispensable component in optical communication.

The structure of the conventional optical assembly is shown in fig. 1, and is composed of a metal front cover 1, a ceramic sleeve 2, a first press block 3, a second press block 4, a ceramic ferrule 5, an outer ring 6 and an isolator 7, wherein the isolator 7 is mostly a Free Space Isolator (FSI) related to polarization, and the structure is shown in fig. 2: the isolator 7 is composed of a magnetic ring 71 and an isolator chip 72 arranged in the magnetic ring 71, wherein the isolator chip 72 is composed of three components, namely a Faraday rotator 722, a polarizer 721 arranged on one side of the Faraday rotator 722, and an analyzer 723 arranged on the other side of the Faraday rotator 722. When the faraday rotator 722 is located in a magnetic field, the vibration plane of incident light can be rotated by 45 °, and the polarizer 721 and the analyzer 723 are polarizing plates, which can filter light rays outside the target direction, so that the directions of light signals entering the optical assembly are uniform, and interference is avoided. However, in the conventional optical assembly, the installation of the magnetic ring 71 needs to be matched with the second pressing block 4 through the outer ring 6, errors are generated in the installation of the magnetic ring 71, the matching of the isolator chip 72 and the magnetic ring 71 and the installation between the second pressing block 4 and the outer ring 6, and in order to ensure the full coverage of the isolator chip 72 on the optical path, the area of the isolator chip 72 needs to be large enough to accommodate the installation errors, so that the side length of the isolator chip 72 (generally, a square piece is used for a faraday rotator due to a cutting process) needs to be about 0.5 mm. However, faraday rotation plates and polarizing plates are expensive, and it is an extremely important issue to reduce the area of the isolator chip and the manufacturing cost of the optical module.

Meanwhile, the mounting holes for mounting the isolator chips 72 on the magnetic ring 71 are all round holes, the isolator chips 72 are usually cut in a square shape, and the two isolator chips 72 need to be corrected for a plurality of times in order to fix the mounting angles of the isolator chips 72 during mounting, so that the assembly efficiency is reduced, and meanwhile, the round holes of the magnetic ring 71 can enable the isolator chips 72 to rotate, so that the assembly difficulty is increased, and the production cost of the optical assembly is greatly increased.

In order to further reduce the material usage of the optical component and the production cost of the optical component, researchers have conducted intensive research on the material usage and the production cost, and the scheme is generated.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide a take integration optical assembly structure of isolator to further improve the installation accuracy of isolator chip, reduce the manufacturing cost of isolator chip area in order to reduce optical assembly. In order to achieve the above purpose, the utility model adopts the following technical scheme:

(II) technical scheme

the utility model provides a take integration optical assembly structure of isolator, includes metal protecgulum, ceramic sleeve pipe, briquetting, ceramic lock pin and isolator chip, the ceramic sleeve pipe is arranged in the metal protecgulum and by the briquetting is fixed, ceramic lock pin one end is arranged in the ceramic sleeve pipe, the other end is fixed in the briquetting, be located on the briquetting metal protecgulum one side is provided with one and is used for fixing the lock pin locating hole of ceramic lock pin, the other end are provided with a chip accommodation hole, the lock pin locating hole with the chip accommodation hole is linked together, the chip accommodation hole is provided with two at least orientation angles, the isolator chip comprises polarizer, magnetism Faraday rotator and analyzer and install in the chip accommodation hole and by the orientation angle location is fixed.

the pressing block is divided into a first pressing block and a second pressing block, an electrical gap is formed between the first pressing block and the second pressing block, the first pressing block is fixedly connected with the metal front cover, and the inserting core positioning hole and the chip accommodating hole are formed in the second pressing block.

Preferably, the orientation angle is a right angle.

Furthermore, at least two positioning angles are distributed diagonally.

Furthermore, the number of the positioning angles in the chip accommodating hole is four, and the positioning angles are distributed in four corners.

Further, the chip accommodation hole is square.

Furthermore, the four positioning angles of the chip accommodating hole are connected through arc surfaces.

(III) advantageous effects

Compared with the prior art, the utility model has obvious advantages and beneficial effects, particularly, the utility model utilizes the same briquetting to press the ceramic ferrule and hold the isolator chip simultaneously, cancels the outer loop, changes the twice assembly required for the installation of the isolator chip into one-time assembly, improves the assembly precision, can reduce the area of the isolator chip under the condition of ensuring the full coverage of the light path, and greatly reduces the material cost; and simultaneously, the utility model discloses set up the position angle in the chip accommodation hole that is used for assembling the isolator chip in the briquetting, it is more accurate to fix a position when making the isolator chip installation, need not to carry out complicated correction to it, has avoided later stage isolator chip to take place to rotate, greatly reduced the assembly degree of difficulty of isolator chip, reduced assembly cost, improved production efficiency.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of a conventional optical assembly;

Fig. 2 is a schematic structural view of the isolator 7 in the conventional optical module;

Fig. 3 is a cross-sectional view of the optical assembly of the present invention;

Fig. 4 is a schematic structural view of an isolator chip 50 used in the present invention;

FIG. 5 is a cross-sectional view of the second compact 32;

FIG. 6 is a schematic view of the mounting of an isolator chip 50 according to one embodiment;

Fig. 7 is a schematic view showing the mounting of the separator chip 50 in the second embodiment.

The reference numbers illustrate:

1. Metal front cover 2 and ceramic sleeve

3. Briquetting one 4 and briquetting two

5. ceramic ferrule 6, outer ring

7. Isolator 71, magnetic ring

72. isolator chip 721, polarizer

722. Faraday rotator 723 and analyzer

10. Metal front cover 20 and ceramic sleeve

30. Briquetting 31, briquetting one

32. Two pressing blocks 321 and chip accommodating hole

321a, a positioning angle 322 and a ferrule positioning hole

40. Ceramic ferrule 50 and isolator chip

51. Polarizer 52 and magnetic Faraday rotator

53. Polarization analyzer

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Referring to fig. 3 to 7, an integrated optical module structure with an isolator includes a metal front cover 10, a ceramic sleeve 20, a compact 30, a ferrule 40 and an isolator chip 50, wherein,

The ceramic sleeve 20 is arranged in the metal front cover 10 and fixed by the pressing block 30, one end of the ceramic ferrule 40 is arranged in the ceramic sleeve 20, the other end of the ceramic ferrule 40 is fixed in the pressing block 30, a ferrule positioning hole 322 for fixing the ceramic ferrule 40 is arranged on one side of the metal front cover 10 on the pressing block 30, a chip accommodating hole 321 is arranged at the other end of the pressing block, and the ferrule positioning hole 322 is communicated with the chip accommodating hole 321; the isolator chip 50 consists of a polarizer 51, a magnetic Faraday rotation sheet 52 and an analyzer 53, so that the isolator chip 50 has magnetism; because present isolator chip 50 mostly is square cutting, makes its shape be the square, consequently, for to its accurate positioning when isolator chip 50 installs, guarantees that its installation angle is in the expectation scope, prevents simultaneously isolator chip 50 when the installation with install the back take place rotatory skew and produce installation error, chip accommodation hole 321 is provided with two at least location angles 321a, will isolator chip 50's two at least angles are fixed, reduce the assembly degree of difficulty, improve the assembly precision.

As a preferred embodiment, the pressing block 30 is divided into a first pressing block 31 and a second pressing block 32, an electrical gap is formed between the first pressing block 31 and the metal front cover 10, and the ferrule positioning hole 322 and the chip accommodating hole 321 are disposed on the second pressing block 32.

To better fit the square isolator chip 50, the positioning angle 321a is a right angle; further, to better prevent the rotational deviation of the isolator chip 50 during the mounting process, at least two of the positioning angles 321a are diagonally distributed.

For the convenience of processing and further fixing the isolator chip 50, the number of the positioning angles 321a in the chip accommodating hole 321 is four, and the positioning angles are distributed in four corners, and therefore, the present invention provides two embodiments to illustrate the shape thereof, but the present invention provides an embodiment without limiting the specific shape of the chip accommodating hole 321, which is only a preferred embodiment, so that the shape of the chip accommodating hole 321 in the actual production can be arbitrary on the basis of having at least two positioning angles 321a, that is, the connecting surface between the positioning angles can be a single plane, a plurality of planes, or even a multi-curved surface:

The first embodiment,

As shown in fig. 6, a chip accommodating hole 321 is formed at the bottom of the ferrule positioning hole 322, and is square, and at this time, four corners of the square are positioning corners 321a, and the size of the chip accommodating hole 321 is slightly larger than that of the isolator chip 50, so that the installation angle deviation of the isolator chip 50 can be kept within ± 8 °.

Error discussion in example one: the side length of the chip accommodating hole 321 is 0.35mm +/-0.02 mm, and the chip accommodating hole 321 is supposed to be deviated to one side by 0.02mm under the condition of limit error, and compared with the traditional structure, the ceramic ferrule 40 is pressed and the isolator chip 50 is accommodated by the same pressing block 30 without the magnetic ring 71, so that the 0.02mm is a single-side error when the isolator chip 50 is installed because the outer ring 6 is eliminated.

traditional error analysis: the coaxiality error of the outer ring 6 of the traditional optical assembly installed in the second pressing block 4 is as high as 0.06mm, the coaxiality error between the second pressing block 4 and the ceramic ferrule 5 is as high as 0.02mm, and if the errors that the isolator chip 72 is installed in the magnetic ring 71 and the magnetic ring 71 is installed in the outer ring 6 are added, the installation error of the isolator chip 72 can reach 0.08mm on one side.

And (4) comparing the results: the utility model provides a more traditional optical assembly of error of integration optical assembly structure reduces greatly at the error of laser incidence end, makes isolator center and the skew distance of light path reduce to make the length of side of required isolator reduce to 0.3mm, compare in current structure, isolator chip area reduces greatly, greatly reduced the manufacturing cost of isolator and the assembly degree of difficulty of optical assembly.

example II,

as shown in fig. 7, the four positioning corners 321a of the chip accommodating hole 321 are connected by a circular arc surface, that is, the four positioning corners 321a are formed on the basis of a circular hole. The straight edge length of the positioning angles 321a needs to ensure that the isolator chip 50 is still located between the four positioning angles 321a after rotating 8 degrees, and does not contact the arc surface. The structure is simple to process and convenient to position, the installation angle deviation of the isolator chip 50 is guaranteed to be within +/-8 degrees, meanwhile, the processing difficulty and the processing cost of the chip accommodating hole 321 are reduced, the production efficiency is further improved, and the production cost of the optical assembly is reduced.

The design key points of the utility model lie in that the same pressing block is used for simultaneously pressing the ceramic ferrule and accommodating the isolator chip, the outer ring is cancelled, and the isolator chip with magnetism is adopted, so that the two-time assembly required by the installation of the isolator chip is changed into one-time assembly, the assembly precision is improved, the area of the isolator chip can be reduced under the condition of ensuring the full coverage of the light path, and the material cost is greatly reduced; and simultaneously, the utility model discloses set up the position angle in the chip accommodation hole that is used for assembling the isolator chip in the briquetting, it is more accurate to fix a position when making the isolator chip installation, has avoided the isolator chip to take place to rotate after the installation, need not to carry out complicated correction to it, greatly reduced the assembly degree of difficulty of isolator chip, reduced assembly cost, improved production efficiency.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. the utility model provides a take integration optical assembly structure of isolator which characterized in that: including metal protecgulum, ceramic bushing, briquetting, ceramic lock pin and isolator chip, the ceramic bushing is arranged in the metal protecgulum and by the briquetting is fixed, ceramic lock pin one end is arranged in the ceramic bushing, the other end is fixed in the briquetting, lie in on the briquetting metal protecgulum one side is provided with one and is used for fixing the lock pin locating hole of ceramic lock pin, other end are provided with a chip accommodation hole, the lock pin locating hole with the chip accommodation hole is linked together, the chip accommodation hole is provided with two at least orientation angles, the isolator chip comprises polarizer, magnetism Faraday rotator and analyzer and install in the chip accommodation hole and by the orientation angle location is fixed.

2. The integrated optical package structure with an isolator of claim 1, wherein: the pressing block is divided into a first pressing block and a second pressing block, an electrical gap is formed between the first pressing block and the second pressing block, the first pressing block is fixedly connected with the metal front cover, and the inserting core positioning hole and the chip accommodating hole are formed in the second pressing block.

3. The integrated optical module structure with isolator as claimed in claim 1 or 2, wherein: the positioning angle is a right angle.

4. The integrated optical package structure with an isolator of claim 1, wherein: at least two positioning angles are distributed in a diagonal manner.

5. the integrated optical package structure with isolator of claim 3, wherein: the number of the positioning angles in the chip accommodating hole is four, and the positioning angles are distributed in four corners.

6. The integrated optical package structure with isolator of claim 5, wherein: the chip accommodating hole is square.

7. The integrated optical package structure with isolator of claim 5, wherein: the four positioning angles of the chip accommodating hole are connected through arc surfaces.