CN221226814U - Emission TO-CAN with built-in optical isolator - Google Patents
Emission TO-CAN with built-in optical isolator Download PDFInfo
- Publication number
- CN221226814U CN221226814U CN202323161938.5U CN202323161938U CN221226814U CN 221226814 U CN221226814 U CN 221226814U CN 202323161938 U CN202323161938 U CN 202323161938U CN 221226814 U CN221226814 U CN 221226814U
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- optical isolator
- fixed
- pipe cap
- built
- emission
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- 230000003287 optical effect Effects 0.000 title claims abstract description 64
- 239000005357 flat glass Substances 0.000 claims abstract description 17
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 14
- 230000006872 improvement Effects 0.000 description 5
- 230000004075 alteration Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Semiconductor Lasers (AREA)
Abstract
The utility model relates TO a transmitting TO-CAN with built-in optical isolator, a tube cap is fixed on a TO-CAN base, a cushion block fixed with the TO-CAN base is arranged in the tube cap, a laser chip is fixed on the side surface of the cushion block, and the optical isolator is fixed at the position of an optical port corresponding TO the laser chip at the top of the cushion block; a window is arranged on the top wall of the pipe cap at the light-emitting position of the corresponding optical isolator, and a piece of flat glass which is fixed with the top wall of the pipe cap and covers the window is arranged in the pipe cap; and a hemispherical lens with a spherical surface facing the optical isolator is fixed on the lower surface of the plate glass at the position corresponding to the light emergent position of the optical isolator. The beneficial effects are as follows: because the optical isolator is arranged in the pipe cap and is closer TO the laser chip, the size of the optical isolator CAN be relatively small, the cost of the optical isolator is saved, the focal length of the whole emission TO-CAN is shortened, the length of the emission TO-CAN CAN be effectively compressed when the focal length is shortened, the internal space of the optical module is saved, and the structure is more compact.
Description
Technical Field
The utility model relates TO the field of optical devices, in particular TO a transmitting TO-CAN with an internal optical isolator.
Background
Existing transmit TO-CAN generally include: the TO-CAN optical system comprises a TO-CAN base, a laser chip fixedly arranged on the TO-CAN base and a pipe cap sleeved on the periphery of the TO-CAN base, wherein a packaging structure is formed, a window is usually arranged on the pipe cap, a ball lens is arranged on the window, light rays emitted by the laser chip are converged by the ball lens and then coupled into an optical fiber for optical communication, no built-in optical isolator is commonly arranged, and therefore the shortest focal length of a conventional emitted TO-CAN is 5.6mm.
Disclosure of utility model
The technical problem TO be solved by the utility model is TO provide a transmitting TO-CAN with an optical isolator built in, so as TO overcome the defects in the prior art.
The technical scheme for solving the technical problems is as follows: an emission TO-CAN with built-in optical isolator, comprising: the TO-CAN base and a pipe cap fixed on the TO-CAN base are arranged in the pipe cap, a cushion block fixed with the TO-CAN base is arranged in the pipe cap, a laser chip is fixed on the side face of the cushion block, and an optical isolator is fixed at the position of an optical port corresponding TO the laser chip at the top of the cushion block; a window is arranged on the top wall of the pipe cap at the light-emitting position of the corresponding optical isolator, and a piece of flat glass which is fixed with the top wall of the pipe cap and covers the window is arranged in the pipe cap; and a hemispherical lens with a spherical surface facing the optical isolator is fixed on the lower surface of the plate glass at the position corresponding to the light emergent position of the optical isolator.
The beneficial effects of the utility model are as follows:
The optical isolator is arranged in the pipe cap and is closer TO the laser chip, so that the size of the optical isolator CAN be relatively small, the cost of the optical isolator is saved, and in addition, the focal length of the whole emission TO-CAN CAN be shortened due TO the fact that the optical isolator is arranged in the pipe cap, specifically: the focal length CAN be smaller than 3.2mm, and the focal length CAN be shortened TO effectively compress the length of the emission TO-CAN, so that the internal space of the optical module is saved, the whole structure is more compact, the application range is wider, in addition, an external optical isolator is not needed when the emission TO-CAN is actually applied, and the production process is simplified;
Compared with the traditional TO-CAN transmitting method, the TO-CAN transmitting method adopts the hemispherical lens TO replace 2 spherical lenses with different radiuses arranged in the tube cap in the traditional TO-CAN transmitting method, so that the cost CAN be reduced, the size of the whole TO-CAN transmitting method CAN be reduced, in addition, the spherical aberration CAN be effectively reduced due TO the use of the hemispherical lens, the lens CAN be prevented from being damaged due TO the fact that the hemispherical lens is arranged in the hemispherical lens, and the whole structure is simpler.
On the basis of the technical scheme, the utility model can be improved as follows.
Further, a high refractive index hemispherical lens is used as the hemispherical lens.
The adoption of the method has the further beneficial effects that: the high refractive index hemispherical lens can effectively compress the focal length.
Further: the high refractive index hemispherical lens is made of glass, and the refractive index is larger than 1.7.
Further, the optical isolator has a horizontal dimension of less than 0.4mm.
Further, a hemispherical lens is bonded to the lower surface of the plate glass.
The adoption of the method has the further beneficial effects that: glue is adopted for bonding, so that the fixing is convenient and the stability is good.
Furthermore, the cushion block is made of ceramic materials.
The adoption of the method has the further beneficial effects that: the cushion block made of the ceramic material can effectively dissipate heat generated by the laser chip during working.
Further, an antireflection film is plated on the surface of the plate glass at the light-emitting position of the corresponding optical isolator.
The adoption of the method has the further beneficial effects that: the transmittance of the light beam emitted by the laser chip can be effectively increased.
Drawings
FIG. 1 is a block diagram of a transmit TO-CAN with an optical isolator built into the utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1. TO-CAN base, 2, pipe cap, 210, window, 3, cushion, 4, laser chip, 5, optical isolator, 6, plate glass, 7, hemisphere lens.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Example 1
As shown in fig. 1, a transmit TO-CAN with built-in optical isolator, comprising:
A TO-CAN base 1, wherein a pipe cap 2 is fixed at one end of the TO-CAN base 1, which is away from the pins, a cushion block 3 fixed with the TO-CAN base 1 is arranged in the pipe cap 2, a laser chip 4 is fixed on the side surface of the cushion block 3, and an optical isolator 5 is fixed at the position of an optical port corresponding TO the laser chip 4 at the top of the cushion block 3;
in addition, a window 210 is formed on the top wall of the pipe cap 2 at the light emergent position of the corresponding optical isolator 5, and a plate glass 6 which is fixed with the top wall of the pipe cap 2 and covers the window 210 is arranged in the pipe cap 2;
A hemispherical lens 7 with a spherical surface facing the optical isolator 5 is fixed on the lower surface of the plate glass 6 at the position corresponding to the light emergent position of the optical isolator 5;
The light beam emitted by the laser chip 4 sequentially passes through the optical isolator 5, the hemispherical lens 7, the flat glass 6 and the window 210 and then is emitted out of the pipe cap 2;
In this embodiment, since the optical isolator 5 is built in the cap 2 and is closer TO the laser chip 4, the size of the optical isolator 5 CAN be relatively small, so as TO save the cost of the optical isolator 5, and in addition, since the optical isolator 5 is built in the cap 2, the focal length of the entire emitted TO-CAN be shortened, specifically: the focal length CAN be smaller than 3.2mm, and the focal length CAN be shortened TO effectively compress the length of the emission TO-CAN, so that the internal space of the optical module is saved, the whole structure is more compact, the application range is wider, in addition, an external optical isolator is not needed when the emission TO-CAN is actually applied, and the production process is simplified;
Compared with the traditional TO-CAN transmitting method, the TO-CAN transmitting method adopts the hemispherical lens 7 TO replace 2 spherical lenses with different radiuses arranged in the pipe cap in the traditional TO-CAN transmitting method, so that the cost CAN be reduced, the size of the whole TO-CAN transmitting method CAN be reduced, in addition, the spherical aberration CAN be effectively reduced by using the hemispherical lens 7, and the hemispherical lens 7 CAN be internally provided with the lens protecting device, so that the lens CAN not be damaged in the coupling operation process, and the whole structure is simpler.
Example 2
As shown in fig. 1, this embodiment is a further improvement of embodiment 1, specifically as follows:
the hemispherical lens 7 is preferably a high refractive index hemispherical lens because: the high refractive index hemispherical lens can effectively compress the focal length, and the method is further as follows: the high refractive index hemispherical lens is made of glass, and the refractive index is larger than 1.7.
Example 3
As shown in fig. 1, this embodiment is a further improvement of embodiment 2, specifically as follows:
Since the optical isolator 5 is built in the cap 2 and is close to the laser chip 4, the optical isolator 5 may have a horizontal dimension of less than 0.4mm.
Example 4
As shown in fig. 1, this embodiment is a further improvement of the embodiment 1, 2 or 3, and is specifically as follows:
The hemispherical lens 7 is adhered to the lower surface of the plate glass 6 by glue, and the plate glass is convenient to fix and good in stability.
Example 5
As shown in fig. 1, this embodiment is a further improvement of the embodiment 1, 2, 3 or 4, and is specifically as follows:
The cushion block 3 is preferably made of ceramic, and the cushion block 3 made of ceramic can effectively dissipate heat generated by the laser chip 4 during working.
Example 6
As shown in fig. 1, this embodiment is a further improvement of any of embodiments 1 to 5, and specifically includes the following:
The surface of the plate glass 6 is plated with an antireflection film at the light-emitting position of the corresponding optical isolator 5, so that the transmittance of the light beam emitted by the laser chip 4 can be effectively increased.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (7)
1. An emission TO-CAN with an optical isolator built in, comprising: the laser device comprises a TO-CAN base (1) and a pipe cap (2) fixed on the TO-CAN base (1), wherein a cushion block (3) fixed with the TO-CAN base (1) is arranged in the pipe cap (2), a laser chip (4) is fixed on the side surface of the cushion block (3), and an optical isolator (5) is fixed at the top of the cushion block (3) at an optical port corresponding TO the laser chip (4); a window (210) is formed in the top wall of the pipe cap (2) at the light-emitting position of the corresponding optical isolator (5), and a piece of flat glass (6) which is fixed with the top wall of the pipe cap (2) and covers the window (210) is arranged in the pipe cap; and a hemispherical lens (7) with a spherical surface facing the optical isolator (5) is fixed on the lower surface of the plate glass (6) at the light emergent position of the corresponding optical isolator (5).
2. An emission TO-CAN with built-in optical isolator according TO claim 1, characterized in that the hemispherical lens (7) is a high refractive index hemispherical lens.
3. The TO-CAN emitter with built-in optical isolator of claim 2, wherein the high refractive index hemispherical lens is made of glass, and the refractive index is greater than 1.7.
4. An emission TO-CAN with built-in optical isolator according TO claim 1, characterized in that the optical isolator (5) has a horizontal dimension of less than 0.4mm.
5. An emission TO-CAN with built-in optical isolator according TO claim 1, characterized in that the hemispherical lens (7) is glued TO the lower surface of the flat glass (6).
6. The transmitting TO-CAN with built-in optical isolator according TO claim 1, wherein the pad (3) is made of ceramic material.
7. The emission TO-CAN of a built-in optical isolator according TO claim 1, wherein the surface of the plate glass (6) is coated with an antireflection film at the light exit of the corresponding optical isolator (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323161938.5U CN221226814U (en) | 2023-11-21 | 2023-11-21 | Emission TO-CAN with built-in optical isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323161938.5U CN221226814U (en) | 2023-11-21 | 2023-11-21 | Emission TO-CAN with built-in optical isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221226814U true CN221226814U (en) | 2024-06-25 |
Family
ID=91566935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323161938.5U Active CN221226814U (en) | 2023-11-21 | 2023-11-21 | Emission TO-CAN with built-in optical isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221226814U (en) |
-
2023
- 2023-11-21 CN CN202323161938.5U patent/CN221226814U/en active Active
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