CN211786245U - Multidirectional space light beam coupling device and optical module - Google Patents
Multidirectional space light beam coupling device and optical module Download PDFInfo
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- CN211786245U CN211786245U CN202020753424.6U CN202020753424U CN211786245U CN 211786245 U CN211786245 U CN 211786245U CN 202020753424 U CN202020753424 U CN 202020753424U CN 211786245 U CN211786245 U CN 211786245U
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Abstract
The utility model relates to an optical communication technical field discloses a multidirectional space beam coupling device and optical module. The multi-directional spatial beam coupling device includes: the device comprises four paths of semiconductor lasers for emitting laser beams with different wavelengths, a regular rectangular pyramid reflector, a converging lens and optical fibers; the regular rectangular pyramid reflector comprises four side surfaces, each side surface forms a reflecting surface, and each reflecting surface is correspondingly provided with a semiconductor laser at a preset included angle, so that all paths of laser beams are reflected and then emitted in parallel along the same direction vertical to the same base plane; the converging lens is positioned on the light-emitting side of the regular rectangular pyramid reflector, and the center of the wire core of the input end of the optical fiber is positioned at the focal point of the converging lens. The embodiment of the utility model provides an adopted the regular rectangular pyramid speculum that has four plane of reflection, can realize the beam that closes of the laser beam of four ways different wavelengths, consequently can reduce the whole volume of device, reduce manufacturing cost, can also improve wavelength correlation loss and luminous power uniformity.
Description
Technical Field
The utility model relates to an optical communication technical field especially relates to a multidirectional space beam coupling device and optical module.
Background
The optical module is an important component of a modern optical communication network, and provides a Gbit high-speed data physical channel for the communication network, and the optical transmitter is the most core component in the optical module. With the rapid development of the current data center network and the current telecommunication network, the requirements of multi-wavelength channel beam combination, small-size coupling packaging, low cost and the like are provided for the optical module.
As data center applications, IEEE has defined a four-Wavelength based LAN WDM (local area network Wavelength division Multiplexing), CWDM (Coarse Wavelength division multiplexer) standard. For the multi-wavelength light emitting device, the scheme of the dielectric thin film optical filter is a multi-wavelength and long-wavelength beam combining and combining scheme which is commonly used at present, but the existing scheme still has some defects and challenges, such as inconsistent propagation optical path of each wavelength, obvious wavelength-dependent loss, large size of the optical device and the like.
There are also some differentiated solutions on multi-wavelength optical transmitters, and there are patents related to the related matters. For example, the patent with application number 201821655673.0 and named as semiconductor laser space beam combining device, the main technical scheme is as follows: the laser beam is collimated by a beam shaping element, then reflected by a reflecting mirror with a reflecting surface forming an angle of 45 degrees with the optical axis of the laser beam, and emitted out by rotating for 90 degrees, and the laser beam after the rotation of the multi-path laser assembly forms a laser beam array stacked on a fast axis; the focusing lens focuses the laser beam array to the multimode fiber and then combines the laser beam array and the multimode fiber for output. Although this patent implements a combination of multi-directional spatial beams, the overall device size and manufacturing cost are high due TO the inclusion of multiple discrete TO components.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multidirectional space beam coupling device and optical module to solve the great and higher defect of manufacturing cost of device size that prior art exists.
To achieve the purpose, the utility model adopts the following technical proposal:
a multi-directional spatial beam coupling device, comprising: the device comprises four paths of semiconductor lasers for emitting laser beams with different wavelengths, a regular rectangular pyramid reflector, a converging lens and optical fibers;
the regular rectangular pyramid reflector comprises a bottom surface and four side surfaces, each side surface forms a reflecting surface, each reflecting surface is correspondingly provided with one semiconductor laser, and each semiconductor laser and the corresponding reflecting surface form a preset included angle, so that laser beams emitted by the semiconductor lasers are reflected by the corresponding reflecting surfaces and then are emitted in parallel along the same direction vertical to the same substrate plane;
the converging lens is positioned on the light-emitting side of the regular rectangular pyramid reflector, and the core center of the input end of the optical fiber is positioned at the focal point of the converging lens.
Optionally, a dihedral angle formed by each side surface and the bottom surface of the regular rectangular pyramid reflector is 45 degrees, and each semiconductor laser and the corresponding reflection surface form a 45-degree included angle.
Optionally, the regular rectangular pyramid reflecting mirrors are located at the center positions of the four semiconductor lasers.
Optionally, each of the semiconductor lasers is further attached with a corresponding heat sink.
Optionally, an optical isolator is further disposed at the input end of the optical fiber.
Optionally, a corresponding collimating lens is further disposed between each semiconductor laser and the corresponding reflecting surface.
Optionally, the optical fiber is a thermal core-expanding optical fiber or an optical fiber lens, and the optical fiber lens is a spherical or conical optical fiber lens.
A light module comprising a multidirectional spatial beam coupling device as claimed in any one of the above.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
the utility model discloses multidirectional space beam coupling device, owing TO adopted the regular rectangular pyramid speculum that has four plane of reflection, can realize the beam that closes of the laser beam of four ways different wavelengths simultaneously, compare with the realization mode of the multichannel laser TO subassembly of current adoption echelonment range, can be great degree reduce the whole volume of device, reduce manufacturing cost, can also effectively guarantee the reflection angle control accuracy of each plane of reflection, and guarantee that each wavelength propagates the optical path unanimously, improve wavelength correlation loss and light-emitting power uniformity, improve the reliability of product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic top view of a multidirectional spatial light beam coupling device according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a multidirectional spatial light beam coupling device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the embodiments of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the embodiments of the present invention.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of embodiments of the present invention and the above-described drawings, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the utility model provides a multidirectional space beam coupling device, it closes to restraint multidirectional space beam, passes through optic fibre output after focusing.
Please refer to a schematic top view structure of the multi-directional spatial beam coupling device shown in fig. 1 and a schematic perspective structure of the multi-directional spatial beam coupling device shown in fig. 2.
The multi-directional spatial beam coupling device of the present embodiment mainly includes: the device comprises a multi-path semiconductor laser 1, a regular rectangular pyramid reflector 2, a converging lens 3 and an optical fiber 4.
The multi-path semiconductor laser 1 is used for emitting multi-path laser beams with different wavelengths; the regular rectangular pyramid reflector 2 is used for combining multiple paths of laser beams with different wavelengths; a converging lens 3 for converging the laser beam after the beam combination; and an optical fiber 4 for transmitting the converged laser beam.
The number of the semiconductor lasers 1 is four, and each of the semiconductor lasers 1 is configured to emit a laser beam of a different wavelength. The regular rectangular pyramid reflector 2 comprises a bottom surface and four side surfaces, each side surface is formed into a reflecting surface, each reflecting surface is correspondingly provided with one semiconductor laser 1, and each semiconductor laser 1 and the corresponding reflecting surface form a certain preset included angle, so that laser beams emitted by the semiconductor lasers 1 can be emitted along the same direction perpendicular to the same substrate plane after being reflected by the corresponding reflecting surface, and the combination of multiple paths of laser beams is realized.
Illustratively, the substrate planes of the four semiconductor lasers 1 are located in the same horizontal plane, the four semiconductor lasers 1 are divided into two groups, each group includes two semiconductor lasers 1 arranged oppositely, and the laser beams of the two groups are perpendicular.
The regular rectangular pyramid reflector 2 is located at the intersection center of the laser beams of the two groups of semiconductor lasers 1, the bottom surface of the regular rectangular pyramid reflector 2 is parallel to the base plane of the semiconductor lasers 1, and a dihedral angle formed by each side surface and the bottom surface is 45 degrees, so that the emergent direction of the laser beam of each semiconductor laser can be reflected by the side surface of the regular rectangular pyramid reflector 2 to realize 90-degree rotation.
Of course, in other embodiments, the dihedral angle formed by each side surface of the regular rectangular pyramid reflector 2 and the bottom surface is not limited to 45 degrees, and may be other sizes, and is not limited in particular. However, based on the different included angles between the side surfaces and the bottom surface, the included angle between each semiconductor laser 1 and the corresponding side surface needs to be adaptively adjusted to ensure that the laser beams of each semiconductor laser 1 can be emitted in parallel along the same direction after being reflected by the emitting surface of the regular rectangular pyramid reflector 2, so as to achieve the purpose of beam combination.
The converging lens 3 is a lens with a large clear aperture, is positioned in the light-emitting direction of the combined multipath laser beams, and is used for focusing the laser beams to the optical fiber 4. The condensing lens 3 may be any one of a single aspherical lens, a single spherical lens, a lens group composed of a plurality of spherical lenses, a lens group composed of a plurality of aspherical lenses, and a lens group composed of a plurality of cylindrical lenses.
The core center of the input end of the optical fiber 4 is located at the focus position of the convergent lens 3 and is used for receiving the converged and focused laser beam for transmission. The optical fiber 4 may be a single mode fiber, such as a thermal core-expanding fiber, or a fiber lens (e.g., a spherical or tapered fiber lens) to improve the coupling efficiency.
In addition, an optical isolator 5 is provided at the input end of the optical fiber 4 to suppress the backward light of different degrees at each end surface in the transmission line. This backward light can seriously interfere with the normal output of the laser, causing problems such as intensity fluctuations, frequency drift, modulation bandwidth degradation, noise enhancement and even destroying the normal operation of the laser, and can cause system transmission performance degradation, optical amplifier gain variation and self-excitation, and ultimately, bit errors.
Each semiconductor laser 1 is respectively mounted on a corresponding heat sink 6, and the heat sink 6 is used as a direct carrier of the semiconductor laser 1, mainly solving the connection problem of the heat-radiating electrodes of the semiconductor laser 1. The emission end position of each semiconductor laser 1 is also provided with a corresponding collimating lens 7 for converting the laser beam emitted by the semiconductor laser 1 into a parallel collimated light beam to be emitted to the reflecting surface of the regular rectangular pyramid reflector 2.
An application example will be provided below:
providing a four-way semiconductor laser 1, namely an LD1 for emitting laser light with a lambda 1 wavelength, an LD2 for emitting laser light with a lambda 2 wavelength, an LD3 for emitting laser light with a lambda 3 wavelength and an LD4 for emitting laser light with a lambda 4 wavelength;
LD1 and LD3 are used as a first group and are oppositely arranged; LD2 and LD4 are used as a second group and are oppositely arranged; and the first group is perpendicular to the second group;
the regular rectangular pyramid reflector 2 is placed at the intersection center position of the two groups of semiconductor lasers 1, the dihedral angle between the side surface and the bottom surface of the regular rectangular pyramid reflector 2 is 45 degrees, and the included angle between the laser beam of each semiconductor laser 1 and the corresponding side surface is 45 degrees.
At this time, after being collimated, the four laser beams are respectively rotated by 90 degrees by the corresponding reflection surfaces and then emitted in parallel along the same direction, and are focused by the converging lens 3 and then output through the optical fiber 4.
Another embodiment of the present invention further provides an optical module, which includes the multidirectional spatial light beam coupler as described above, and is not repeated here.
TO sum up, the utility model discloses multidirectional space beam coupling device, owing TO adopted the regular rectangular pyramid speculum 2 that has four plane of reflection, can realize the beam that closes of the laser beam of four ways different wavelength simultaneously, compare with the realization mode of the multichannel laser TO subassembly of current adoption echelonment range, can the whole volume of the device that reduces of great degree, reduce manufacturing cost, can also effectively guarantee the reflection angle control accuracy of each plane of reflection, and guarantee that each wavelength propagates the optical path unanimously, improve wavelength correlation loss and luminous power uniformity, improve the reliability of product.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A multidirectional spatial beam coupling device, comprising: the device comprises four paths of semiconductor lasers for emitting laser beams with different wavelengths, a regular rectangular pyramid reflector, a converging lens and optical fibers;
the regular rectangular pyramid reflector comprises a bottom surface and four side surfaces, each side surface forms a reflecting surface, each reflecting surface is correspondingly provided with one semiconductor laser, and each semiconductor laser and the corresponding reflecting surface form a preset included angle, so that laser beams emitted by the semiconductor lasers are reflected by the corresponding reflecting surfaces and then are emitted in parallel along the same direction vertical to the same substrate plane;
the converging lens is positioned on the light-emitting side of the regular rectangular pyramid reflector, and the core center of the input end of the optical fiber is positioned at the focal point of the converging lens.
2. The device according to claim 1, wherein each side surface of the regular rectangular pyramid reflector forms a dihedral angle of 45 degrees with the bottom surface, and each semiconductor laser is disposed at an included angle of 45 degrees with the corresponding reflective surface.
3. The device of claim 1, wherein the regular rectangular pyramid mirrors are located at the center of four semiconductor lasers.
4. The device of claim 1, wherein each of said semiconductor lasers is further mounted with a corresponding heat sink.
5. The device of claim 1, wherein an optical isolator is further provided at the input end of the optical fiber.
6. A device as claimed in claim 1, wherein a respective collimating lens is provided between each semiconductor laser and the respective reflecting surface.
7. The device according to claim 1, wherein the optical fiber is a thermally expanded core fiber or a fiber lens.
8. A light module comprising a multidirectional spatial beam coupling device as claimed in any one of claims 1 to 7.
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| CN202020753424.6U CN211786245U (en) | 2020-05-09 | 2020-05-09 | Multidirectional space light beam coupling device and optical module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230315A (en) * | 2020-12-10 | 2021-01-15 | 武汉乾希科技有限公司 | Mirror group, method for growing mirror group, optical device and optical system |
| CN112763455A (en) * | 2021-01-04 | 2021-05-07 | 安徽中科华仪科技有限公司 | Reflection type multi-light-path multi-wavelength coupling method for remote sensing detection of motor vehicle exhaust |
| CN115016132A (en) * | 2022-08-09 | 2022-09-06 | 苏州镭陌科技有限公司 | Modular beam combining device suitable for high-power laser |
| WO2023108835A1 (en) * | 2021-12-16 | 2023-06-22 | 上海瑞柯恩激光技术有限公司 | Solid laser and solid laser system |
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2020
- 2020-05-09 CN CN202020753424.6U patent/CN211786245U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230315A (en) * | 2020-12-10 | 2021-01-15 | 武汉乾希科技有限公司 | Mirror group, method for growing mirror group, optical device and optical system |
| CN112230315B (en) * | 2020-12-10 | 2021-03-09 | 武汉乾希科技有限公司 | Mirror group, method for growing mirror group, optical device and optical system |
| CN112987153A (en) * | 2020-12-10 | 2021-06-18 | 武汉乾希科技有限公司 | Reflector group, optical device and optical system |
| CN112763455A (en) * | 2021-01-04 | 2021-05-07 | 安徽中科华仪科技有限公司 | Reflection type multi-light-path multi-wavelength coupling method for remote sensing detection of motor vehicle exhaust |
| WO2023108835A1 (en) * | 2021-12-16 | 2023-06-22 | 上海瑞柯恩激光技术有限公司 | Solid laser and solid laser system |
| CN115016132A (en) * | 2022-08-09 | 2022-09-06 | 苏州镭陌科技有限公司 | Modular beam combining device suitable for high-power laser |
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