CN111965767A - Double-channel coaxial laser packaging structure - Google Patents
Double-channel coaxial laser packaging structure Download PDFInfo
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- CN111965767A CN111965767A CN202010938494.3A CN202010938494A CN111965767A CN 111965767 A CN111965767 A CN 111965767A CN 202010938494 A CN202010938494 A CN 202010938494A CN 111965767 A CN111965767 A CN 111965767A
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- laser
- light beam
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- tube cap
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4256—Details of housings
- G02B6/4257—Details of housings having a supporting carrier or a mounting substrate or a mounting plate
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4256—Details of housings
- G02B6/4262—Details of housings characterised by the shape of the housing
- G02B6/4263—Details of housings characterised by the shape of the housing of the transisitor outline [TO] can type
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4266—Thermal aspects, temperature control or temperature monitoring
- G02B6/4268—Cooling
- G02B6/4269—Cooling with heat sinks or radiation fins
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
Abstract
The invention discloses a dual-channel coaxial laser packaging structure which comprises a light beam aggregator, a first laser and a second laser, wherein the two side surfaces of the light beam aggregator are parallel, one side surface of the light beam aggregator is plated with a narrow-band filter coating, laser beams emitted by the first laser and laser beams emitted by the second laser are respectively emitted on the two side surfaces of the light beam aggregator, the laser beams emitted by the first laser and the second laser are aggregated into a coaxial laser after being reflected and transmitted by the light beam aggregator, the light beam aggregator is obliquely arranged, the first laser is arranged below the light beam aggregator, the second laser is arranged on the right side of the light beam aggregator, and the narrow-band filter coating is plated on one side surface of the light beam aggregator close to the second laser. The coaxial packaging of the dual-channel laser is realized, the production cost is effectively reduced, the packaging size of the laser is reduced, and the miniaturization of the optical module is facilitated.
Description
Technical Field
The invention relates to the technical field of optical communication device production, in particular to a dual-channel coaxial laser packaging structure.
Background
The development of the high-speed optical communication technology meets the transmission requirement of the modern society on mass data, and is based on the application and development of the high-speed optical communication technology, the big data, the cloud storage technology and other technologies. Nowadays, communication technology is rapidly developed, and optical devices are increasingly used for communication, wherein signal transmitting and receiving devices are indispensable.
In the production of optical devices, the traditional laser is usually packaged by adopting a single channel, and the metal shell has the advantages of higher cost, large packaging size and low space utilization rate. With the development of communication technology, multiple lasers are coupled into one optical fiber in more and more occasions. If the laser adopting single-channel packaging needs to be additionally provided with a coupling device, the production cost is high, the production efficiency is low, and the miniaturization of the optical module is not facilitated. Therefore, a new package structure is needed to solve the current problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a dual-channel coaxial laser packaging structure, which realizes dual-channel coaxial packaging by polymerizing light beams emitted by two lasers, and can reduce cost and packaging size.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a dual-channel coaxial laser packaging structure is characterized in that: the laser device comprises a light beam polymerization device, a first laser device and a second laser device, wherein the surfaces of the two sides of the light beam polymerization device are parallel, a narrow-band filter coating is plated on the surface of one side of the light beam polymerization device, laser beams emitted by the first laser device and laser beams emitted by the second laser device are respectively emitted on the surfaces of the two sides of the light beam polymerization device, and the laser beams emitted by the first laser device and the second laser device are polymerized into a coaxial laser beam after being reflected and transmitted by the light beam polymerization device.
Furthermore, the light beam polymerization device is obliquely arranged, the first laser device is arranged below the light beam polymerization device, the second laser device is arranged on the right side of the light beam polymerization device, and the narrow-band filter coating is plated on the surface of one side, close to the second laser device, of the light beam polymerization device.
Further, the inclination angle of the beam aggregator is 45 °.
The laser device further comprises a focusing lens, the focusing lens is arranged above the beam aggregator, and the focusing lens is used for focusing the laser beams emitted by the first laser device and the second laser device after the laser beams are reflected and transmitted by the beam aggregator.
The laser beam focusing device comprises a base, a heat sink and a tube cap, wherein the heat sink is fixed on the base, the light beam polymerizer, the first laser and the second laser are arranged on the heat sink, the tube cap covers the heat sink, the lower end of the tube cap is connected with the base, and the focusing lens is arranged in the tube cap.
Further, a first backlight detector and a second backlight detector are arranged on the heat sink, and the first backlight detector is arranged in the opposite direction of the light emitting surface of the first laser and used for detecting the light emitting state of the first laser; the second backlight detector is arranged in the opposite direction of the light-emitting surface of the second laser and used for detecting the light-emitting state of the second laser.
Furthermore, the base is further connected with a functional pin, the functional pin is respectively connected with the anode of the first laser, the cathode of the first laser, the anode of the second laser, the cathode of the first backlight detector and the cathode of the second backlight detector, and the anodes of the first backlight detector and the second backlight detector are both connected with the base.
Further, the base is disc-shaped, a mounting boss is formed by protruding in the rear side direction of the upper surface of the base, and the heat sink is fixed on the inner side surface of the mounting boss.
Furthermore, the pipe cap is of a cylindrical structure, a mounting hole for mounting the focusing lens is formed in the center of the upper side of the pipe cap, a holding cavity for holding the heat sink is formed in the center of the lower side of the pipe cap, the edge of the lower end of the pipe cap extends outwards to form a convex edge, and the pipe cap is connected with the base through the convex edge.
Further, the focusing lens and the pipe cap are consistent with the central axis of the base.
The invention has the following remarkable effects:
1. the dual-channel simultaneous output of the two lasers is realized, so that two optical signals with different wavelengths simultaneously share one set of packaging structure, the space utilization rate is improved, the packaging size of the lasers is reduced, and the production cost is reduced;
2. through the arrangement of the light beam polymerizer with the single-sided narrow-band coating, laser beams with different wavelengths emitted by the first laser and the second laser are transmitted and reflected, so that two paths of laser beams are polymerized into a beam of coaxial light, and the coaxial packaging of the dual-channel laser is realized;
3. the focusing lens is coupled into one optical fiber, so that a rear-end coupling device is saved, the complexity of a coupling assembly is reduced, the production efficiency is improved, the packaging size of the laser is further reduced, and the miniaturization of the optical module is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a left side view of the present invention;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
FIG. 6 is a schematic view of the internal structure of the present invention;
FIG. 7 is a front view of FIG. 6;
fig. 8 is a schematic diagram of the present invention.
Detailed Description
The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.
As shown in fig. 1-7, a dual-channel coaxial laser package structure includes a base 1, a heat sink 2, a tube cap 3, and a focusing lens 4, where the focusing lens 4 and the tube cap 3 are consistent with the central axis of the base 1, the heat sink 2 is fixed on the base 1, a light beam aggregator 5, a first laser 6 and a second laser 7 are arranged on the heat sink 2, the tube cap 3 is covered on the heat sink 2, and the lower end of the tube cap is connected to the base 1, the focusing lens 4 is installed in the tube cap 3, the heat sink 2 is provided with the light beam aggregator 5, the first laser 6 and the second laser 7, the right side surface of the light beam aggregator 5 is plated with a narrow-band filter, the laser beams emitted by the first laser 6 and the laser beams emitted by the second laser 7 are respectively irradiated on the left and right side surfaces of the light beam aggregator 5, the laser beam emitted by the first laser 6 after being transmitted by the beam aggregator 5 and the laser beam emitted by the second laser 7 after being reflected by the beam aggregator 5 are aggregated into a coaxial laser, the focusing lens 4 is arranged above the beam aggregator 5, and the focusing lens 4 is used for focusing the coaxial laser.
Referring to fig. 6 and 7, a first backlight detector 9 and a second backlight detector 10 are further disposed on the heat sink 2, where the first backlight detector 9 is disposed in a direction opposite to the light emitting surface of the first laser 6, and is configured to detect the light emitting state of the first laser 6; the second backlight detector 10 is disposed in the opposite direction of the light emitting surface of the second laser 7, and is configured to detect the light emitting state of the second laser 7.
As shown in fig. 7, the beam combiner 5 is disposed obliquely, the first laser 6 is disposed below the beam combiner 5, the second laser 7 is disposed on the right side of the beam combiner 5, and the narrow-band filter is coated on a surface of the beam combiner 5 close to the second laser 7. In order to ensure that the signal intensity of the reflected or transmitted laser beam can be kept as high as possible, and simultaneously ensure that the laser beams emitted by the first laser 6 and the second laser 7 can be better coaxially output and converged into one optical fiber by the focusing lens 4, the inclination angle of the beam combiner 5 is 45 degrees.
Preferably, the base 1 is further connected with a functional pin 8, the functional pin 8 is respectively connected with the anode of the first laser 6, the cathode of the first laser 6, the anode of the second laser 7, the cathode of the first backlight detector 9 and the cathode of the second backlight detector 10, and the anodes of the first backlight detector 9 and the second backlight detector 10 are both connected with the base 1.
Preferably, base 1 is the disc, and the protruding installation boss 1a that forms in the later side direction of this base 1 upper surface, heat sink 2 is fixed in the medial surface of this installation boss 1a, adopts this structure to compare in with heat sink 2 set up the upper surface at base 1 with the conventional art, compare in the traditional mode of being fixed in base 1 upper surface with heat sink 2, can make packaging structure inner space more reasonable to can accomplish encapsulation structure's volume littleer, help realizing the miniaturization of optical module.
Preferably, the pipe cap 3 is of a cylindrical metal structure to ensure sufficient support strength and heat dissipation effect, a mounting hole 3a for mounting the focusing lens 4 is formed in the center of the upper side of the pipe cap 3, an accommodating cavity 3b for accommodating the heat sink 2 is formed in the center of the lower side of the pipe cap 3, the edge of the lower end of the pipe cap 3 extends outwards to form a convex edge 3c, and the pipe cap 3 is connected with the base 1 through the convex edge 3c, so that a larger contact area is formed between the pipe cap 3 and the base 1, the connection strength between the pipe cap 3 and the base 1 can be enhanced, the pipe diameter of the pipe cap 3 cannot be increased, and the production cost is well controlled.
In the specific implementation process, the principle of the structure is shown in fig. 8, and the calculation formula of the focal length is shown
It can be known that the laser beam emitted by the first laser 6 passes through the beam combiner 5 and reaches the focusing lens 4, and the laser beam emitted by the second laser 7 reaches the focusing lens 4 after being emitted by the beam combiner 5, and in order to ensure that the two focused laser beams can be coupled into one optical fiber at the same time, it is necessary to ensure that the distances from the first laser 6 and the second laser 7 to the focusing lens 4 are the same, that is, L11+ L12+ L0 is L2+ L0.
However, since the laser beam emitted from the first laser 6 is refracted when passing through the beam combiner 5, and the light wave deviates from the optical axis of the focusing lens 4, the first laser 6 should be shifted h1 for pasting, if the laser beam emitted from the first laser 6 enters the beam combiner 5, the incident angle θ 1 and the reflection angle θ 2; when the beam combiner 5 is emitted, the incident angle θ 3 and the reflection angle θ 4 are set. Assuming an air refractive index n1, and a refractive index n2 of the beam combiner 5, according to the law of refraction of light: n1 × sin θ 1 ═ n2 × sin θ 2, n2 × sin θ 3 ═ n1 × sin θ 4, since the tilt angle of the beam combiner 5, that is, θ 1, is 45 °, and the two faces of the beam combiner 5 are parallel to each other, then: θ 4 ═ θ 1 ═ 45 °, H1 ═ cos θ 2 × -H.
It can be seen that the first laser 6 is still parallel to the optical axis after passing through the beam combiner 5, and is offset from the axial center by a distance h1, and the laser beam emitted by the second laser 7 passes through the 45 ° beam combiner 5 and exits parallel to the optical axis.
Therefore, by carrying out offset mounting on the first laser 6, the optical axes lower than the laser and the second laser 7 can be ensured to be concentric; the distance between the first laser 6, the second laser 7 and the beam aggregator 5 is adjusted, so that the focuses of the two lasers can be consistent; thus realizing that two beams of light are coupled into one optical fiber simultaneously.
The technical solution provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A dual-channel coaxial laser packaging structure is characterized in that: the laser device comprises a light beam polymerization device, a first laser device and a second laser device, wherein the surfaces of the two sides of the light beam polymerization device are parallel, a narrow-band filter coating is plated on the surface of one side of the light beam polymerization device, laser beams emitted by the first laser device and laser beams emitted by the second laser device are respectively emitted on the surfaces of the two sides of the light beam polymerization device, and the laser beams emitted by the first laser device and the second laser device are polymerized into a coaxial laser beam after being reflected and transmitted by the light beam polymerization device.
2. The dual channel coaxial laser package structure of claim 1, wherein: the light beam polymerization device is obliquely arranged, the first laser device is arranged below the light beam polymerization device, the second laser device is arranged on the right side of the light beam polymerization device, and the narrow-band filter coating is plated on the surface of one side, close to the second laser device, of the light beam polymerization device.
3. The dual channel coaxial laser package structure of claim 2, wherein: the inclination angle of the beam aggregator is 45 °.
4. The dual channel coaxial laser package structure of claim 1, wherein: the laser beam focusing device further comprises a focusing lens, the focusing lens is arranged above the beam aggregator, and the focusing lens is used for focusing the laser beam reflected or transmitted by the beam aggregator.
5. The dual channel coaxial laser package structure of claim 4, wherein: the laser beam focusing device comprises a light beam polymerization device, a first laser device, a second laser device, a tube cap, a focusing lens and a base, wherein the light beam polymerization device, the first laser device and the second laser device are arranged on the heat sink, the tube cap covers the heat sink, the lower end of the tube cap is connected with the base, and the focusing lens is arranged in the tube cap.
6. The dual channel coaxial laser package structure of claim 5, wherein: the heat sink is also provided with a first backlight detector and a second backlight detector, and the first backlight detector is arranged in the opposite direction of the light-emitting surface of the first laser and is used for detecting the light-emitting state of the first laser; the second backlight detector is arranged in the opposite direction of the light-emitting surface of the second laser and used for detecting the light-emitting state of the second laser.
7. The dual channel coaxial laser package structure of claim 6, wherein: the base is further connected with a functional pin, the functional pin is respectively connected with the anode of the first laser, the cathode of the first laser, the anode of the second laser, the cathode of the first backlight detector and the cathode of the second backlight detector, and the anodes of the first backlight detector and the second backlight detector are both connected with the base.
8. The dual-channel coaxial laser package structure according to any one of claims 5 to 7, wherein: the base is disc-shaped, the upper surface of the base is raised in the rear side direction to form an installation boss, and the heat sink is fixed on the inner side surface of the installation boss.
9. The dual-channel coaxial laser package structure according to any one of claims 5 to 7, wherein: the tube cap is of a cylindrical structure, a mounting hole for mounting the focusing lens is formed in the center of the upper side of the tube cap, an accommodating cavity for accommodating the heat sink is formed in the center of the lower side of the tube cap, the edge of the lower end of the tube cap extends outwards to form a convex edge, and the tube cap is connected with the base through the convex edge.
10. The dual-channel coaxial laser package structure according to any one of claims 5 to 7, wherein: the focusing lens and the pipe cap are consistent with the central axis of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938494.3A CN111965767A (en) | 2020-09-09 | 2020-09-09 | Double-channel coaxial laser packaging structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010938494.3A CN111965767A (en) | 2020-09-09 | 2020-09-09 | Double-channel coaxial laser packaging structure |
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| CN111965767A true CN111965767A (en) | 2020-11-20 |
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| CN202010938494.3A Pending CN111965767A (en) | 2020-09-09 | 2020-09-09 | Double-channel coaxial laser packaging structure |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188132B1 (en) * | 1997-09-15 | 2001-02-13 | Industrial Technology Research Institute | Two-wavelength semiconductor laser diode package for use on the read/write head of an optical drive capable of reading different types of optical discs |
| CN203660271U (en) * | 2014-01-02 | 2014-06-18 | 大连藏龙光电子科技有限公司 | 10G micro high-speed laser emitter |
| CN204028412U (en) * | 2014-09-01 | 2014-12-17 | 北京杏林睿光科技有限公司 | Double-wavelength semiconductor laser beam coupled structure |
| CN105071196A (en) * | 2015-07-21 | 2015-11-18 | 北京杏林睿光科技有限公司 | Narrow linewidth beam combination module and multi-wavelength Raman laser provided with same |
| CN107482470A (en) * | 2017-07-20 | 2017-12-15 | 广东格斯泰气密元件有限公司 | 5G communicates 20GHz laser dual chip encapsulation bases and its manufacture method |
| CN206820247U (en) * | 2017-05-14 | 2017-12-29 | 晋江市托美汀生物科技有限公司 | Distributed Feedback Laser |
| CN107728267A (en) * | 2017-11-14 | 2018-02-23 | 嘉兴卓尔光电科技有限公司 | A kind of package assembly of single laser optic assemblies |
| CN211180308U (en) * | 2019-12-07 | 2020-08-04 | 武汉高跃科技有限责任公司 | High-power pulse tail laser subassembly |
-
2020
- 2020-09-09 CN CN202010938494.3A patent/CN111965767A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188132B1 (en) * | 1997-09-15 | 2001-02-13 | Industrial Technology Research Institute | Two-wavelength semiconductor laser diode package for use on the read/write head of an optical drive capable of reading different types of optical discs |
| CN203660271U (en) * | 2014-01-02 | 2014-06-18 | 大连藏龙光电子科技有限公司 | 10G micro high-speed laser emitter |
| CN204028412U (en) * | 2014-09-01 | 2014-12-17 | 北京杏林睿光科技有限公司 | Double-wavelength semiconductor laser beam coupled structure |
| CN105071196A (en) * | 2015-07-21 | 2015-11-18 | 北京杏林睿光科技有限公司 | Narrow linewidth beam combination module and multi-wavelength Raman laser provided with same |
| CN206820247U (en) * | 2017-05-14 | 2017-12-29 | 晋江市托美汀生物科技有限公司 | Distributed Feedback Laser |
| CN107482470A (en) * | 2017-07-20 | 2017-12-15 | 广东格斯泰气密元件有限公司 | 5G communicates 20GHz laser dual chip encapsulation bases and its manufacture method |
| CN107728267A (en) * | 2017-11-14 | 2018-02-23 | 嘉兴卓尔光电科技有限公司 | A kind of package assembly of single laser optic assemblies |
| CN211180308U (en) * | 2019-12-07 | 2020-08-04 | 武汉高跃科技有限责任公司 | High-power pulse tail laser subassembly |
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Application publication date: 20201120 |