CN112068247A - Multi-wavelength laser coaxial transmitting system - Google Patents
Multi-wavelength laser coaxial transmitting system Download PDFInfo
- Publication number
- CN112068247A CN112068247A CN202010995268.9A CN202010995268A CN112068247A CN 112068247 A CN112068247 A CN 112068247A CN 202010995268 A CN202010995268 A CN 202010995268A CN 112068247 A CN112068247 A CN 112068247A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- laser
- coaxial
- clad
- collimator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
-
- 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
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
-
- 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
- G02B6/26—Optical coupling means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a coaxial laser emitting system with different wavelengths, which comprises: the optical fiber bundle comprises an optical fiber bundle, a coupling end, a multi-clad optical fiber and a collimator; the optical fiber bundle consists of a plurality of optical fibers, and one end of each optical fiber is connected with a laser light source to transmit laser; the other end of each optical fiber of the optical fiber bundle is coupled and connected with one end of the multi-clad optical fiber by the coupling end, and the laser transmitted by the optical fiber bundle is coupled and enters the multi-clad optical fiber; the multi-clad optical fiber realizes coaxial transmission in the multi-clad optical fiber for the input beam-combined laser; the collimator receives the coaxial laser from the multi-cladding optical fiber and collimates and outputs the coaxial laser. The invention realizes the common fiber transmission of the laser with different wavelengths by utilizing the multi-cladding fiber, and simultaneously realizes the matching of the light with different wavelengths and the coverage field angle by combining the dispersion characteristic of the collimating lens and the diameters of the cladding and the fiber core of the multi-cladding fiber, thereby avoiding the use of color separation optical elements and improving the coaxial stability of the laser beams with different wavelengths.
Description
Technical Field
The invention relates to the technical field of laser transmission, in particular to a multi-wavelength laser coaxial transmitting system which is used for combined beam transmission of lasers with various wavelengths and is an optical system capable of realizing common optical path and same aperture laser transmission.
Background
In free space laser transmission, such as in free space laser communication and laser weapons, in order to transmit main laser to a designated airspace, guidance of beacon light is required, and the beacon light and the main laser are required to be transmitted strictly coaxially, and the beacon light guidance realizes tracking capture and accurate pointing of a target.
In order to realize the detection of optical characteristics of targets by different wavelengths or the detection capability of airspace targets in different ranges, the laser radar needs to have the capability of transmitting corresponding laser wavelengths under different working conditions, and all the laser wavelengths are required to be coaxial.
Conventional coaxial emission of multiple lasers requires multiple optical components, which results in increased device cost and is also more prone to failure. Therefore, the invention provides a simple multi-wavelength coaxial transmitting system, simplifies the structure of the device, improves the reliability of the device and reduces the cost.
Disclosure of Invention
The invention aims to provide a multi-wavelength laser coaxial transmitting system which is simple in structure, reliable in performance and low in cost.
In order to achieve the above object, the present invention provides a multi-wavelength laser coaxial transmission system, comprising: the optical fiber bundle, the coupling end, the multi-cladding optical fiber and the collimator. The optical fiber bundle consists of a plurality of optical fibers, and one end of each optical fiber is connected with a laser light source; the coupling end couples the other end of the optical fiber bundle with one end of the multi-clad optical fiber, and couples the laser in the optical fiber bundle into the multi-clad optical fiber; the multi-clad optical fiber realizes coaxial transmission in the multi-clad optical fiber for the input beam-combined laser; the collimator receives the coaxial laser from the multi-clad fiber and collimates and outputs the coaxial laser.
Because of the dispersion characteristic of the collimator, different focal lengths exist for different wavelength lasers, so that different wavelength lasers emitted from the same end face cannot be all located at the focus of the same collimator, and a defocusing phenomenon exists for part of the wavelength lasers, which also causes that the divergence angles of the different wavelength lasers emitted from the same end face in the system are different after the lasers are output by the same collimator. By utilizing the point, the system realizes the coaxial emission output of the same collimator to the laser with different wavelength divergence angles, thereby avoiding using a plurality of optical coating color separation elements and a plurality of collimators and further reducing the complexity of the system. Wherein, the optical fiber bundle is composed of single or mixed single mode optical fiber and multimode optical fiber. The optical fiber bundle can be directly connected with a laser light source, and the laser light source comprises a light source output by a laser and a light source combined by a wavelength division multiplexing device. The laser light source comprises a solid laser, a fiber laser, a semiconductor laser and the like. The laser light sources can be connected with tail fibers to output laser, and the tail fibers are connected with single optical fibers of the optical fiber bundles in the system to transmit the laser. The coupling end receives laser with different wavelengths input from an optical fiber bundle and couples the laser with the different wavelengths into the multi-clad optical fiber, the coupling mode of the coupling end comprises an end face fusion welding method and a side face fusion welding method, and the end face fusion welding method is suitable for coupling and connecting a single-mode optical fiber and a multi-clad optical fiber core; the side fusion welding method is suitable for coupling and connecting the multimode optical fiber and the inner cladding of the multi-cladding optical fiber. The thickness and number of layers of the multi-clad fiber in the system can be properly adjusted according to the actual transmission laser wavelength range and number, and the multi-clad fiber also comprises a conventional double-clad fiber.
The corresponding wavelength dispersion amount of the collimator is determined according to different angles of view of laser emission with different wavelengths emitted by the multi-clad optical fiber and different diameters of light spots corresponding to the emitting ends, and the collimator comprises a reflecting type collimator and a transmitting type collimator. The laser output by the collimator in the system realizes the correspondence of the wavelength and the emission field angle, and the output laser is suitable for being connected with a beam expanding lens or a scanning device and the like.
The system is suitable for various laser transmission fields, including free space laser communication, beacon light guidance in laser radar, detection transmission of signal light and the like.
Compared with the prior art, the invention has the following advantages:
the invention realizes that the lasers with different wavelengths in the optical fiber bundle are coupled into the same multi-clad optical fiber through the coupling end, completes the multi-wavelength laser beam combination, and avoids using a plurality of independent color separation optical elements. Meanwhile, the output of the laser with different wavelengths shares one collimator, so that the number of the collimators is reduced. The invention improves the coaxial stability of the combined beams with different wavelengths, reduces the volume of the system and improves the flexibility of the system installation.
Drawings
Fig. 1 is a schematic structural diagram of a coaxial transmission system for lasers with different wavelengths according to the present invention.
Detailed Description
The following describes a method for implementing multi-wavelength laser coaxial transmission according to the present invention in further detail with reference to fig. 1 and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
As shown in FIG. 1, the present invention provides a method for implementing coaxial transmission of multi-wavelength laser, which includes four components, namely, an optical fiber bundle 1, a coupling end 2, a multi-clad optical fiber 3, and a collimator 4. The optical fiber bundle 1 consists of a plurality of optical fibers, and one end of each optical fiber is connected with a laser light source and is used as an input end of multi-wavelength laser; the coupling end 2 couples the other end of each optical fiber in the optical fiber bundle 1 with one end of the multi-clad optical fiber 3, and couples the laser in the optical fiber bundle 1 into the multi-clad optical fiber 3; the multi-clad optical fiber 3 realizes coaxial transmission in the multi-clad optical fiber 3 for the input combined laser; the collimator 4 receives the coaxially output laser light from the multi-clad optical fiber 3 and collimates the output.
Because of the dispersion characteristic of the collimator, different focal lengths exist for different wavelengths of laser light, so that the laser light with different wavelengths emitted from the same end face cannot be uniformly positioned at the focal point of the collimator, and the laser light with partial wavelengths has a defocusing phenomenon, so that the laser light with different wavelengths emitted from the same end face in the system has different divergence angles after being output by the same collimator. By utilizing the point, the system realizes the coaxial emission output of the same collimator to laser with different wavelengths and different divergence angles, thereby avoiding the use of a plurality of optical coating color separation elements and a plurality of collimating mirrors and further reducing the complexity of the system.
The optical fiber bundle 1 is formed by a single mode optical fiber, or a multimode optical fiber, or a mixture of the single mode optical fiber and the multimode optical fiber. The optical fiber bundle 1 can be directly connected with various laser light sources, and the laser light sources comprise light sources output by lasers and light sources combined by wavelength division multiplexing devices. The laser light source comprises a solid laser, a fiber laser, a semiconductor laser and the like. The laser light sources all output laser light through tail fibers of the laser light sources, and each optical fiber of the optical fiber bundle 1 is connected with the tail fibers of the laser light sources to realize laser transmission. The coupling end receives laser with different wavelengths input from an optical fiber bundle and couples the laser into the multi-clad optical fiber, and the coupling mode of the coupling end is an end face fusion splicing method and a side face fusion splicing method; specifically, the core of the single-mode optical fiber and the core of the multi-clad optical fiber 3 are fusion-spliced using an end face fusion splicing method. The core of the multimode optical fiber and the inner cladding of the multi-clad optical fiber 3 are bonded and fixed by using a side fusion method.
The cladding thickness and the number of layers of the multi-clad fiber 3 can be properly adjusted according to the actual transmission effect for the laser with different wavelengths, and the multi-clad fiber 3 in the system comprises a conventional double-clad fiber.
In the present invention, the angle of view of the laser beams of different wavelengths output from the multi-clad fiber 3 exiting through the collimator 4 can also be adjusted according to the corresponding wavelength dispersion amount of the collimator 4. In this case, the collimator 4 includes a reflective type and a transmissive type.
In the preferred embodiment, as shown in fig. 1, the number of the optical fiber bundles used is 3, and the optical fiber bundles are respectively a single-mode optical fiber a and two multimode optical fibers b and c, and the optical fibers used in the optical fiber bundle 1 are double-clad optical fibers. The specification parameters of the optical fiber are shown in the following table 1:
| optical fiber numbering | Core diameter/um | Cladding diameter/um | Operating wavelength/nm | Numerical aperture |
| Single mode optical fiber a | 9 | 125 | 1550 | 0.13 |
| Multimode optical fiber b | 62.5 | 125 | 905 | 0.22 |
| Multimode optical fiber c | 62.5 | 125 | 905 | 0.22 |
TABLE 1 optical fiber Specification parameters
In the preferred embodiment, the light source connected with the single-mode fiber a is a single-mode fiber laser, the light sources connected with the multimode fibers b and c are multimode fiber lasers, and the coupling end 2 is connected with the multi-clad fiber 3 through a fusion welding method.
In the preferred embodiment, the single-mode optical fiber a in the optical fiber bundle 1 is fusion-spliced to the core of the multi-clad optical fiber 3 by an end face fusion-splicing method, and the two multi-mode optical fibers b and c are bonded and fixed to the inner cladding of the multi-clad optical fiber 3 by a side face fusion-splicing method.
In the preferred embodiment, the other end of the multi-clad fiber 3 is connected to the collimator 4. The collimator 4 is a plano-convex aspheric lens made of glass material H-LaK5A, the thickness of the lens is 5.2mm, the light-passing aperture is 10mm, the outer diameter is 14mm, and aspheric coefficients of the lens are shown in the following table 2:
| surface type | Radius of curvature/mm | Coefficient of quadric surface K | Quartic coefficient A | Coefficient of degree six B |
| Aspherical surface | 13.133 | -0.9886 | 2.1712×10-5 | 8.887×10-9 |
TABLE 2 aspheric coefficients of collimator
Due to the dispersive properties of this lens (collimator 4), the focal length of the collimator 4 is 20mm at a laser wavelength of 1550nm and 19.7mm at a corresponding laser wavelength of 905 nm.
In this preferred embodiment, the light-emitting end face of the multi-clad optical fiber 3 is located at the focus of the laser wavelength 1550nm corresponding to the collimator 4, that is, at the working distance of 16.86mm, and the divergence angle of the laser with the wavelength of 1550nm after being output by the collimator 4 can be calculated to be 450 μ rad; considering the dispersion characteristic of the collimator 4, the focal length corresponding to the laser wavelength 905nm is 19.7mm, and it is understood that the working distance of the collimator 4 to the laser wavelength 905nm is 16.58mm, and therefore, in the preferred embodiment, the laser light of the wavelength 905nm emitted from the multi-clad fiber 3 is out of focus. The dispersion defocusing and the diameter of the inner cladding are comprehensively considered, and the divergence angle of the laser with the wavelength of 905nm after being output by the collimator 4 is 9.4 mrad. The output that the difference of the field angles of the laser with the wavelength of 1550nm and the laser with the wavelength of 905nm is nearly 20 times is realized.
Furthermore, the optical materials with different dispersion coefficients are used for carrying out chromatic aberration correction on the collimator 4 to eliminate chromatic aberration, so that the output that the field angle difference between the wavelength 1550nm and the wavelength 905nm is nearly 6 times can be realized.
In the invention, the laser output by the collimation of the matching collimating lens 4 can realize the correspondence of the wavelength and the emission field angle, and then can be connected with a beam expanding lens or a scanning device and the like according to the requirement. In the invention, the optical fiber bundle 1 can be directly connected with the laser light sources output by each laser or connected with the laser light sources output after being combined by the wavelength division multiplexing device according to the requirement, thereby further expanding the application range of the optical fiber wavelength.
The laser coaxial transmission system can be applied to the fields of free space laser communication, beacon light guide in laser radar, detection transmission of signal light and the like, strict coaxial transmission of the beacon light and the signal laser is realized, and the beacon light guide realizes tracking capture and accurate pointing of a target and the like.
In summary, the invention couples the optical fiber bundle 1 to the multi-clad optical fiber 3 to realize beam combination, avoids using a plurality of independent color separation optical elements, improves the coaxial stability of the combined beams with different wavelengths, reduces the volume of the system, and improves the flexibility of system installation. Meanwhile, the lasers with different wavelengths are emitted by one collimating lens (collimator 4), so that the number of the collimating lenses is reduced, and coaxial output of different wavelengths corresponding to different fields of view can be realized by using the dispersion characteristic of the collimating lens. The invention is suitable for a system for transmitting laser energy and information or realizing pointing indication, realizes that different wavelengths correspond to different coverage field ranges, and is also suitable for the field of accurate laser tracking. The device takes an optical fiber output laser as a light source, and the laser is collimated and output after beam combination. The method avoids using an independent color separation optical element, improves the flexibility and the coaxial stability of beam combination of different wavelengths, is practical and flexible, has a simple and stable system structure, and reduces the cost.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A multi-wavelength laser coaxial transmission system, comprising: the device comprises an optical fiber bundle (1), a coupling end (2), a multi-clad optical fiber (3) and a collimator (4);
the optical fiber bundle (1) consists of a plurality of optical fibers, and one end of each optical fiber is connected with a laser light source to transmit laser;
the coupling end (2) couples the other end of each optical fiber of the optical fiber bundle (2) with one end of the multi-clad optical fiber (3), and couples the laser transmitted by the optical fiber bundle (1) into the multi-clad optical fiber (3);
the multi-clad optical fiber (3) realizes coaxial transmission in the multi-clad optical fiber (3) for the input combined beam laser;
the collimator (4) receives the coaxial laser from the multi-cladding optical fiber (3) and collimates and outputs the coaxial laser.
2. The coaxial transmission system of claim 1, wherein the optical fiber bundle (1) is made of single mode fiber, multimode fiber or a mixture of the two.
3. The system according to claim 1, wherein the laser source comprises a laser output light source and a light source combined by a wavelength division multiplexing device.
4. The multiwavelength laser coaxial transmitting system according to claim 2, wherein the coupling means of the coupling terminal (2) comprises an end face fusion method and a side face fusion method.
5. The multi-wavelength laser coaxial transmission system according to claim 4, wherein the end face fusion method is suitable for coupling a single-mode optical fiber and a multi-clad optical fiber core; the side fusion welding method is suitable for coupling and connecting the multimode optical fiber and the inner cladding of the multi-cladding optical fiber.
6. The coaxial transmission system of multiwavelength laser according to claim 1, wherein the thickness of the cladding and the number of layers of said multi-clad fiber (3) are adjustable.
7. The multiwavelength laser coaxial transmitting system according to claim 1, wherein the wavelength dispersion amount of the collimator (4) is determined according to the different wavelength laser emission field angles output by the multi-clad fiber and the spot diameters of the corresponding exit ends.
8. A multi-wavelength laser coaxial transmitting system according to claim 7, wherein said collimator (6) comprises a reflective type, a transmissive type.
9. A multiwavelength laser coaxial launch system according to claim 7, wherein said collimator (6) outputs laser realization wavelengths corresponding to the launch field angle, the output lasers of which are adapted to comprise: and connecting the beam expanding lens and the scanning device.
10. The multiwavelength laser coaxial launch system of claim 1, adapted to comprise: free space laser communication, beacon light guidance in laser radar, and detection and transmission of signal light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995268.9A CN112068247A (en) | 2020-09-21 | 2020-09-21 | Multi-wavelength laser coaxial transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995268.9A CN112068247A (en) | 2020-09-21 | 2020-09-21 | Multi-wavelength laser coaxial transmitting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112068247A true CN112068247A (en) | 2020-12-11 |
Family
ID=73682212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010995268.9A Pending CN112068247A (en) | 2020-09-21 | 2020-09-21 | Multi-wavelength laser coaxial transmitting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112068247A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636838A (en) * | 2020-12-20 | 2021-04-09 | 桂林电子科技大学 | Short-distance multi-wavelength multimode communication system |
| CN114200606A (en) * | 2021-12-13 | 2022-03-18 | 东莞铭普光磁股份有限公司 | Rapid coupling light finding method and system for laser |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1845403A (en) * | 2006-05-08 | 2006-10-11 | 中国科学院上海光学精密机械研究所 | Dual-wavelength pulse fiber laser system |
| CN2899204Y (en) * | 2006-05-08 | 2007-05-09 | 中国科学院上海光学精密机械研究所 | Dual-wavelength pulse fiber laser system |
| CN101075005A (en) * | 2007-06-25 | 2007-11-21 | 武汉光迅科技股份有限公司 | Fiber-optical wave synthesizer for coated pump fiber-optical amplifier |
| CN202984911U (en) * | 2012-12-14 | 2013-06-12 | 武汉锐科光纤激光器技术有限责任公司 | Laser processing system |
| CN107370015A (en) * | 2017-08-15 | 2017-11-21 | 中国科学技术大学 | A kind of multi-wavelength frequency multiplication fiber laser device of wavelength-division multiplex |
| CN207217993U (en) * | 2017-08-15 | 2018-04-10 | 中国科学技术大学 | A kind of multi-wavelength frequency multiplication fiber laser device of wavelength-division multiplex |
-
2020
- 2020-09-21 CN CN202010995268.9A patent/CN112068247A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1845403A (en) * | 2006-05-08 | 2006-10-11 | 中国科学院上海光学精密机械研究所 | Dual-wavelength pulse fiber laser system |
| CN2899204Y (en) * | 2006-05-08 | 2007-05-09 | 中国科学院上海光学精密机械研究所 | Dual-wavelength pulse fiber laser system |
| CN101075005A (en) * | 2007-06-25 | 2007-11-21 | 武汉光迅科技股份有限公司 | Fiber-optical wave synthesizer for coated pump fiber-optical amplifier |
| CN202984911U (en) * | 2012-12-14 | 2013-06-12 | 武汉锐科光纤激光器技术有限责任公司 | Laser processing system |
| CN107370015A (en) * | 2017-08-15 | 2017-11-21 | 中国科学技术大学 | A kind of multi-wavelength frequency multiplication fiber laser device of wavelength-division multiplex |
| CN207217993U (en) * | 2017-08-15 | 2018-04-10 | 中国科学技术大学 | A kind of multi-wavelength frequency multiplication fiber laser device of wavelength-division multiplex |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636838A (en) * | 2020-12-20 | 2021-04-09 | 桂林电子科技大学 | Short-distance multi-wavelength multimode communication system |
| CN114200606A (en) * | 2021-12-13 | 2022-03-18 | 东莞铭普光磁股份有限公司 | Rapid coupling light finding method and system for laser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3937560A (en) | Single fiber access coupler | |
| US6765725B1 (en) | Fiber pigtailed high power laser diode module with high brightness | |
| US20100128243A1 (en) | Compact collimator lens form for large mode area and low numerical aperture fiber laser applications | |
| JP2004126586A (en) | Symmetric bi-aspheric lens for use in optical fiber collimator assembly | |
| CN112068247A (en) | Multi-wavelength laser coaxial transmitting system | |
| JP2004126588A (en) | Symmetric bi-aspheric lens for use in transmissive and reflective optical fiber component | |
| CN102253457A (en) | Hot core expansion optical fiber collimator | |
| CN102253458B (en) | Broad spectrum optical fiber collimator | |
| CN111708133A (en) | Device and method for coupling single-mode optical fiber by laser with large divergence angle | |
| US7162115B2 (en) | Multiport wavelength-selective optical switch | |
| US20020057873A1 (en) | Laser collimator for a free space optical link | |
| US20130209032A1 (en) | Free Optical Beam Fiber-to-Fiber Coupling Systems | |
| CN110231288B (en) | Compact and stable optical path air chamber | |
| US5301249A (en) | Catoptric coupling to an optical fiber | |
| TW200426418A (en) | Optical collimator structure | |
| US20040081397A1 (en) | Tap output collimator | |
| CN100456070C (en) | Optical fibre coupling device of multiple beam laser concave surface reflecting mirror | |
| CN113933939B (en) | Laser communication coupling device and optical axis correction method based on same | |
| GB2120400A (en) | A connection between a generator of optical rays and an optical waveguide | |
| US6748139B2 (en) | Coupler utilizing a diffractive optical element for coupling light to an optical waveguide | |
| JP6756826B2 (en) | Optical beam shaping unit, distance measuring device and laser illuminator | |
| US6853767B1 (en) | Methods for manufacturing optical coupling elements | |
| CN111045152A (en) | Optical fiber coupler | |
| US10705022B2 (en) | Robust spectroscopy systems | |
| CN219247846U (en) | Multi-beam coaxial transmission device for free space optical communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tian Yongming Inventor after: Li Siyuan Inventor after: Chen Xinyi Inventor after: Song Yiwei Inventor after: Cao Zhewei Inventor after: Bai Gang Inventor after: Jiang Yijun Inventor after: Gao Jie Inventor after: Zhang Daqing Inventor after: Wu Miaozhang Inventor before: Tian Yongming Inventor before: Li Siyuan Inventor before: Chen Xinyi Inventor before: Song Yiwei Inventor before: Cao Zhewei Inventor before: Bai Gang Inventor before: Jiang Yijun Inventor before: Gao Jie Inventor before: Zhang Daqing Inventor before: Wu Miaozhang |
|
| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |
|
| RJ01 | Rejection of invention patent application after publication |