CN214375414U - Optical coupling device of optical module and optical module - Google Patents
Optical coupling device of optical module and optical module Download PDFInfo
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- CN214375414U CN214375414U CN202022560093.7U CN202022560093U CN214375414U CN 214375414 U CN214375414 U CN 214375414U CN 202022560093 U CN202022560093 U CN 202022560093U CN 214375414 U CN214375414 U CN 214375414U
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Abstract
The utility model relates to the technical field of optical devices, and discloses an optical coupling device and an optical module of an optical module, wherein the optical module comprises a laser module and an optical detector module, the optical coupling device comprises a main body, a light beam collimation element and a light beam reflection element, the light beam reflection element comprises a light splitting device and a convergence device, and the light beam collimation element and the light beam reflection element are both arranged on the main body; through setting up main part, beam alignment component and beam reflection component, and beam reflection component includes beam splitting device and converges the device, passes through in the laser that sends from the laser instrument module beam splitting device reflects to the optical detector module, and part passes through converge the device to optic fibre, directly sets up beam alignment component and beam reflection component in the main part, need not additionally set up fixed knot again and fix the beam splitting device wherein in the light path, the structure is very simple.
Description
Technical Field
The patent of the utility model relates to an optical device's technical field particularly, relates to an optical coupling device and optical module of optical module.
Background
In the application of optical fiber communication technology, it is first necessary to convert an electrical signal into an optical signal through an optical transmission module, and then couple the optical signal into an optical fiber for conducting the optical signal or a slab optical waveguide for modulating the optical signal.
Currently, as shown in fig. 1, the optical path coupling structure includes an optical chip 203, a converging device 201, and a collimating device 202 for an optical fiber, where the collimating device 202 includes a light-converging surface, a first optical axis, and a first focal point, the optical chip 203 is located at the first focal point, and the collimating device 202 receives incident light emitted by the optical chip 203 and collimates the incident light into a collimated light beam guided along the first optical axis; the converging device 201 includes a concave reflecting surface and a second focal point, the concave reflecting surface is disposed obliquely with respect to the first optical axis, the concave reflecting surface receives the collimated light beam and converges the collimated light beam to the second focal point to form a converging light beam, and an incident point of the optical fiber coincides with the second focal point for receiving the converging light beam.
In the prior art, when the incident light emitted by the optical chip needs to be subjected to backlight detection, a light splitting glass sheet or a light splitting film needs to be set to split the collimated light beam and then perform detection, so that a fixing structure needs to be independently set in a system to fix the light splitting glass sheet or the light splitting film, the cost of a light path coupling structure is increased, and the light path coupling structure is complicated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an optical coupling device and optical module of optical module aims at solving the comparatively complicated problem of light path coupling structure that has the backlight to detect among the prior art.
The utility model discloses a realize like this, an optical coupling device of optical module, optical module include laser module and light detector module, optical coupling device includes
The device comprises a main body, a light beam collimation element and a light beam reflection element, wherein the light beam reflection element comprises a light splitting device and a converging device, and the light beam collimation element and the light beam reflection element are both arranged on the main body; wherein the content of the first and second substances,
the laser module emits laser to the light beam collimation element for collimation, and the laser is irradiated to the light beam reflection element, part of the light is reflected to the optical detector module through the light splitting device, and part of the light is converged to the optical fiber through the converging device.
Preferably, the light beam reflection element further includes a vertical surface, and the light splitting device and the converging device are connected to and spaced apart from the vertical surface.
Preferably, the converging device is disposed obliquely downward toward the beam collimating element, receives the light collimated by the beam collimating element, and converges and reflects the light to the optical fiber.
Wherein, preferably, the beam collimating element is disposed towards the beam reflecting element, and the light collimated by the beam collimating element is parallel or nearly parallel to the vertical plane.
Preferably, the laser module and the optical detector module are both disposed on a circuit board of the optical module, the main body is disposed on the circuit board, and the laser module and the optical detector module are located below the main body.
Preferably, the bottom of the main body is provided with a groove, the laser module and the optical detector module are arranged at the groove opening through the circuit board, the beam collimation element is arranged at the bottom of the groove, the bottom of the groove is provided with an emergent surface, and the emergent surface is transparent and is opposite to the light splitting device and the detector module.
Preferably, the bottom of the groove is provided with an exit surface, and the exit surface is transparent and is arranged opposite to the light splitter and the detector module.
Preferably, the bottom of the main body is provided with a first fixing block and a second fixing block, and the first fixing block, the second fixing block and the bottom of the main body are enclosed to form the groove.
Wherein, preferably, the light beam collimating element comprises a first focal point, a first optical axis and a light condensing surface, the light condensing surface receives incident light emitted from the first focal point and collimates the incident light into a collimated light beam transmitted along the first optical axis, and the collimated light beam is incident to the light beam reflecting element; the laser module is located at the first focal position.
Wherein, preferentially, beam splitting device includes emergent optical axis and reflection straight surface, reflection straight surface is relative first optical axis slope sets up, and toward first optical axis is pressed close to, partly by the reflection straight surface is received and is reflected for the outgoing beam, the outgoing beam is along emergent optical axis conducts extremely the light detector module.
Preferably, the converging device includes a second focal point, a second optical axis, and a reflective concave surface, the second optical axis is arranged to intersect with the first optical axis, the reflective concave surface is arranged to be inclined with respect to the first optical axis, and the reflective concave surface receives another part of the collimated light beam and reflects and converges the other part of the collimated light beam to the second focal point; the optical fiber receives the converged light beam at the second focal point position.
Preferably, the main body is provided with an optical fiber guide hole, a hole bottom of the optical fiber guide hole is located at the second focal point position, and the optical fiber is inserted into the second focal point position from the optical fiber guide hole.
In a second aspect, the present invention further provides an optical module, which includes the optical coupling device, the laser module, the optical detector module, and the circuit board, wherein the optical coupling device, the laser module, and the optical detector module are disposed on the circuit board.
Compared with the prior art, the utility model provides a pair of optical coupling device and optical module of optical module, through setting up main part, light beam collimation component and light beam reflection component, and light beam reflection component includes the beam splitting device and assembles the device, passes through in the laser that sends from the laser module the beam splitting device reflects to the light detector module, and the part passes through assemble the device and assemble to optic fibre, directly set up light beam collimation component and light beam reflection component in the main part, do not need additionally to set up fixed knot again and fix the beam splitting device wherein in the light path, the structure is very simple.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a prior art optical path coupling structure;
fig. 2 is a schematic cross-sectional view of an optical coupling device provided by the present invention;
fig. 3 is a schematic perspective view of an optical coupling device provided by the present invention;
fig. 4 is an optical path diagram of an optical coupling device provided by the present invention;
fig. 5 is a schematic front view of an optical coupling device provided by the present invention;
fig. 6 is a schematic cross-sectional view of an optical coupling device provided by the present invention;
fig. 7 is a schematic front view of an optical coupling device provided by the present invention;
fig. 8 is a schematic front view of an optical coupling device provided by the present invention;
fig. 9 is a schematic front view of an optical coupling device provided by the present invention;
fig. 10 is a schematic perspective view of an optical module according to the present invention.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 2 to fig. 3, the present invention provides a preferred embodiment of an optical coupling device of an optical module.
An optical coupling device of an optical module, the optical module comprising a laser module 140 and a light detector module 150, wherein: the optical coupling device comprises a main body 100, a light beam collimating element 130 and a light beam reflecting element, wherein the light beam reflecting element comprises a light splitting device 120 and a converging device 110, and the light beam collimating element 130 and the light beam reflecting element are both arranged on the main body 100; wherein the content of the first and second substances,
the laser module 140 emits laser light to the beam collimating element 130 for collimation, and the laser light is incident to the beam reflecting element, part of the laser light is reflected to the light detector module 150 through the light splitting device 120, and part of the laser light is converged to the optical fiber 170 through the converging device 110; by arranging the main body 100, the beam collimating element 130 and the beam reflecting element, wherein the beam reflecting element comprises the light splitting device 120 and the converging device 110, part of laser emitted from the laser module 140 is reflected to the optical detector module 150 through the light splitting device 120, and part of laser is converged to the optical fiber 170 through the converging device 110, the beam collimating element 130 and the beam reflecting element are directly arranged on the main body 100, and a fixing structure is not required to be additionally arranged to fix the light splitting device 120 in a light path, so that the structure is very simple; the light beam reflecting element further comprises a vertical surface 180, and the light splitting device 120 and the converging device 110 are connected with the vertical surface 180 and are arranged on two sides of the vertical surface in a separated mode, so that the injection molding manufacturing process of the light splitting device 120 is simplified; the beam collimating element 130 is disposed toward the beam reflecting element, and the light collimated by the beam collimating element 130 is parallel or nearly parallel to the vertical plane 180; the converging device 110 is disposed in a direction of the beam collimating element 130, and is inclined downward to receive the light collimated by the beam collimating element 130, and then converge and reflect the light to the optical fiber 170; the laser module 140 and the light detector module 150 are both disposed on the circuit board 160 of the light module, the main body 100 is disposed on the circuit board 160, and the laser module 140 and the light detector module 150 are disposed below the main body 100, so that the light beam collimating element 130 and the light beam reflecting element disposed on the main body 100 can smoothly receive the laser light emitted by the laser module 140, reflect a part of the light beam to the light detector module 150, and converge a part of the light beam to the light detector module 150; the light detector module 150 is used for backlight detection.
Specifically, the bottom of the main body 100 is provided with a groove 104, and the laser module 140 and the light detector module 150 are arranged at the position of the groove 104 through the circuit board 160; the light beam collimation element 130 is arranged at the bottom of the groove 104, the bottom of the groove 104 is provided with an emergent surface 105, the emergent surface 105 is transparent and is arranged opposite to the light splitting device 120 and the detector module, and light can be directly transmitted to the detector module; the bottom of the main body 100 is provided with a first fixing block 106 and a second fixing block 107, and the first fixing block 106, the second fixing block 107 and the bottom of the main body 100 are enclosed to form a groove 104, which is very convenient.
As shown in fig. 4 to 5, the present invention provides a preferred embodiment of an optical coupling device of an optical module.
The beam collimating element 130 includes a first focal point F1, a first optical axis 102, and a light-condensing surface that receives incident light from the first focal point F1 and collimates the incident light into a collimated beam propagating along the first optical axis 102, the collimated beam being incident on the beam reflecting element; the laser module 140 is located at the first focal point F1; the optical splitter 120 includes an exit optical axis 103 and a reflective straight surface, the reflective straight surface is disposed obliquely with respect to the first optical axis 102 and is close to the first optical axis 102, a part of the collimated light beam is received by the reflective straight surface and reflected as an exit light beam, and the exit light beam is transmitted to the optical detector module 150 along the exit optical axis 103; the converging device 110 comprises a second focal point F2, a second optical axis 101, and a concave reflecting surface, wherein the second optical axis 101 is arranged to intersect the first optical axis 102, the concave reflecting surface is arranged to be inclined relative to the first optical axis 102, and the concave reflecting surface receives another part of the collimated light beam and reflects and converges the other part of the collimated light beam to the position of the second focal point F2; the optical fiber 170 receives the converged light beam at the second focal point F2, and the structure is simple; the light beam collimating element 130 and the light beam reflecting element are integrally formed or spliced, the light beam reflecting element comprises the light splitting device 120 and a converging element, after incident light emitted by the laser module 140 is collimated into collimated light by the light beam collimating element 130, one part of the collimated light is split to the light detector module 150 through the light splitting device 120, the other part of the collimated light is focused to the incident end of the optical fiber 170 through the converging element, a light splitting glass sheet or a light splitting film does not need to be fixed by an additional fixing structure, and when the light beam collimating element 130, the light splitting device 120 and the converging element are integrally formed, the light beam collimating element has better consistency and stability, and the structure is relatively simple.
Specifically, after the incident light passes through the light beam collimating element 130, a part of the incident light is received by the light beam splitting device 120 and reflected to the light detector module 150, and another part of the incident light is received by the light beam converging element and then focused and reflected to the second focal point F2; wherein the incident light refers to light emitted from the laser module 140, and the incident end of the optical fiber 170 refers to the incident end of the optical fiber 170, i.e., the end that enters the optical fiber 170; preferably, the distance between the reflecting straight surface and the light-gathering surface on the vertical plane is shorter than the distance between the reflecting concave surface and the light-gathering surface on the vertical plane, so that a vertical distance difference can be generated between the reflecting straight surface and the reflecting concave surface, and the purpose of splitting the light beam is achieved; the collimated light beam is parallel to the first optical axis 102, so that other light beams on the first optical axis 102 can be prevented from influencing backlight detection and optical path coupling; the light beam collimating element 130 is a condenser lens, the first focus F1 is an object focus of the condenser lens, the first optical axis 102 is an optical axis of the condenser lens, and the condensing surface is an object convex surface of the condenser lens, so as to achieve a better collimating effect on incident light; the beam splitter 120 is a splitting plane mirror, the emergent optical axis 103 is an image optical axis of the splitting plane mirror, the reflecting straight surface is a mirror surface of the reflecting plane mirror, and the beam splitter directly uses a mirror to split light without using a splitting glass or a splitting film to split light; the light beam converging element is a concave reflector, the second optical axis 101 is the second optical axis 101 of the concave reflector, the reflecting concave surface is the concave surface of the concave reflector, and a better light path coupling effect is achieved by utilizing the concave focusing characteristic of the concave reflector.
As shown in fig. 6, the present invention provides a preferred embodiment of the main body 100.
The main body 100 is provided with the optical fiber 170 guide hole 108, the bottom of the optical fiber 170 guide hole 108 is located at the position of the second focus F2, the optical fiber 170 is inserted into the position of the second focus F2 from the optical fiber 170 guide hole 108, and when the light beam converges at the position of the second focus F2, the optical fiber 170 absorbs the light beam.
Fig. 7 shows a preferred embodiment of the reflective straight surface and the reflective concave surface according to the present invention.
The reflecting straight surface is inclined with respect to the first optical axis 102 by a predetermined angle, specifically, the predetermined angle is set to-30 degrees, that is, inclined downward by 30 degrees on the horizontal line, so that the outgoing light beam reflected by the reflecting straight surface does not affect the collimated light beam.
As shown in fig. 8 to 9, the preferred embodiment of the reflective straight surface and the reflective concave surface provided by the present invention is shown.
The reflection straight surface is spliced with the edge of the reflection concave surface, and the edge splicing means that the reflection concave surface has one side which is spliced with the side of the reflection straight surface, so that the function of splitting the light beam is achieved.
Scheme I,
The predetermined angle is set to 30 degrees, but is not limited to 30 degrees, that is, the reflecting straight surface is inclined upward by 30 degrees in the horizontal line.
Scheme II,
The preset angle is set to-30 degrees, but is not limited to-30 degrees, that is, the reflecting straight surface is inclined downward by 30 degrees in the horizontal line.
As shown in fig. 10, the present invention provides a preferred embodiment of an optical module.
An optical module comprising an optical coupling device, a laser module 140 and a photo detector module 150 as described above, and a circuit board 160, the optical coupling device, the laser module 140 and the photo detector module 150 being mounted on the circuit board 160; the circuit board 160 is a PCBA board, wherein the laser module 140 and the optical detector module 150 are both disposed on the PCBA board for light emission or backlight detection; by arranging the optical coupling device, the optical detector module 150, the laser module 140 and the circuit board 160, the optical path coupling device couples the incident light emitted by the laser module 140 and shunts part of the incident light to the optical detector module 150, so that the purpose of coupling the incident light and the purpose of performing backlight detection on the incident light are achieved, and the optical coupling device is very convenient.
Not shown in the drawings is a preferred embodiment of an optical coupling device for an optical module according to the present invention.
The beam splitter 120, the beam reflecting element and the main body 100 are spliced through the connecting block, so that the beam splitter 120, the beam reflecting element and the main body 100 can be manufactured conveniently, and then the beam splitter 120, the beam reflecting element and the main body 100 are spliced in a splicing mode.
Also not shown in the drawings is a preferred embodiment of a laser machining system.
A laser machining system comprising an optical module as described above for laser machining; by arranging the optical module, the light transmission is realized, and the device is very convenient.
The laser module 140 mentioned above is preferably a laser chip for emitting laser light, and may be used in fiber optic applications or laser application fields.
In addition, the first, second, etc. sequence terms noted in the above are not used to define the sequence between the objects, and are used only as identifying terms, and the specific object arrangement position and spatial relationship are defined by the orientation in the text.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (12)
1. An optical coupling device of an optical module, the optical module comprising a laser module and a photodetector module, characterized in that: the optical coupling device comprises a main body, a light beam collimation element and a light beam reflection element, wherein the light beam reflection element comprises a light splitting device and a converging device, and the light beam collimation element and the light beam reflection element are both arranged on the main body; wherein the content of the first and second substances,
the laser module emits laser to the light beam collimation element for collimation, and the laser is irradiated to the light beam reflection element, part of the light is reflected to the optical detector module through the light splitting device, and part of the light is converged to the optical fiber through the converging device.
2. The optical coupling device of claim 1, wherein: the light beam reflection element further comprises a vertical surface, and the light splitting device and the converging device are connected with the vertical surface and are arranged on two sides of the vertical surface in a separated mode.
3. The optical coupling device of claim 1, wherein: the beam collimating element is disposed toward the beam reflecting element, and light collimated by the beam collimating element is parallel or nearly parallel to the vertical plane.
4. The optical coupling device of claim 1, wherein: the converging device is arranged in a direction towards the light beam collimating element in a downward inclining mode, receives light collimated by the light beam collimating element, and converges and reflects the light to the optical fiber.
5. The optical coupling device of claim 1, wherein: the laser module and the optical detector module are arranged on a circuit board of the optical module, the main body is arranged on the circuit board, and the laser module and the optical detector module are located below the main body.
6. The optical coupling device of claim 5, wherein: the bottom of main part is provided with the recess, the laser instrument module and the optical detector module passes through the circuit board sets up in notch department, light beam collimation component sets up in the recess bottom, the recess bottom is equipped with the emitting surface, the emitting surface transparent and with beam splitting device and the detector module sets up relatively.
7. The optical coupling device of claim 6, wherein: the bottom of the main body is provided with a first fixing block and a second fixing block, and the first fixing block, the second fixing block and the bottom of the main body are enclosed to form the groove.
8. The optical coupling device according to any of claims 1-7, wherein: the light beam collimating element comprises a first focus, a first optical axis and a light condensing surface, the light condensing surface receives incident light emitted from the first focus position and collimates the incident light into a collimated light beam transmitted along the first optical axis, and the collimated light beam is incident to the light beam reflecting element; the laser module is located at the first focal position.
9. The optical coupling device of claim 8, wherein: the optical splitter includes emergent optical axis and reflection straight surface, the reflection straight surface is relative first optical axis slope sets up, and toward first optical axis is pressed close to, some of collimated light beam by reflection straight surface is received and is reflected for the beam of exitting, the beam of exitting along emergent optical axis conducts extremely the optical detector module.
10. The optical coupling device of claim 8, wherein: the converging device comprises a second focus, a second optical axis and a reflecting concave surface, the second optical axis is arranged in a crossed mode with the first optical axis, the reflecting concave surface is arranged in an inclined mode relative to the first optical axis, and the reflecting concave surface receives another part of the collimated light beam and reflects and converges the other part of the collimated light beam to the second focus position; the optical fiber receives the converged light beam at the second focal point position.
11. The optical coupling device of claim 10, wherein: the main body is provided with an optical fiber guide hole, the bottom of the optical fiber guide hole is located at the second focus position, and the optical fiber is inserted into the second focus position from the optical fiber guide hole.
12. An optical module, characterized in that: comprising an optical coupling device, a laser module and a photodetector module as claimed in any one of claims 1 to 11, and a circuit board on which the optical coupling device, the laser module and the photodetector module are mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022560093.7U CN214375414U (en) | 2020-11-06 | 2020-11-06 | Optical coupling device of optical module and optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022560093.7U CN214375414U (en) | 2020-11-06 | 2020-11-06 | Optical coupling device of optical module and optical module |
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| CN214375414U true CN214375414U (en) | 2021-10-08 |
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| CN202022560093.7U Active CN214375414U (en) | 2020-11-06 | 2020-11-06 | Optical coupling device of optical module and optical module |
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Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |