CN2645350Y - Non-optical-fiber laser communication receiver - Google Patents
Non-optical-fiber laser communication receiver Download PDFInfo
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- CN2645350Y CN2645350Y CNU032782659U CN03278265U CN2645350Y CN 2645350 Y CN2645350 Y CN 2645350Y CN U032782659 U CNU032782659 U CN U032782659U CN 03278265 U CN03278265 U CN 03278265U CN 2645350 Y CN2645350 Y CN 2645350Y
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- optical fiber
- fiber
- eyepiece
- collimator
- laser communication
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 87
- 230000006854 communication Effects 0.000 title claims abstract description 47
- 238000004891 communication Methods 0.000 title claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
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Abstract
无光纤激光通信接收器是一种采用了光纤准直器的无光纤激光通信接收器，由接收天线和光会聚装置所组成，接收天线1由同一光轴上的物镜1a、目镜1b组成，光会聚装置采用光纤准直器2，该光纤准直器2位于目镜1b的一侧，接收天线1的物镜1a、目镜1b、光纤准直器2均位于外壳3中，且同光轴。光纤准直器由准直透镜2a、内部光纤2b、玻璃套管2d、金属套管2e、尾纤2f、光纤连接器2g组成，在金属套管2e内的一端设有准直透镜2a，在准直透镜2a的后部连接有内部光纤2b，在内部光纤2b外、金属套管2e内设有玻璃套管2d，尾纤2f的一端接内部光纤2b，另一端接光纤连接器2g。
The fiberless laser communication receiver is a fiberless laser communication receiver using a fiber collimator, which is composed of a receiving antenna and a light converging device. The receiving antenna 1 is composed of an objective lens 1a and an eyepiece 1b on the same optical axis. The light converging The device adopts a fiber collimator 2, the fiber collimator 2 is located on one side of the eyepiece 1b, the objective lens 1a of the receiving antenna 1, the eyepiece 1b, and the fiber collimator 2 are all located in the housing 3, and are on the same optical axis. The optical fiber collimator is made up of collimating lens 2a, internal optical fiber 2b, glass casing 2d, metal casing 2e, pigtail 2f, fiber optic connector 2g, and one end in metal casing 2e is provided with collimating lens 2a, in The rear part of the collimating lens 2a is connected with an internal optical fiber 2b, and a glass sleeve 2d is arranged outside the internal optical fiber 2b and inside the metal sleeve 2e. One end of the pigtail 2f is connected to the internal optical fiber 2b, and the other end is connected to the optical fiber connector 2g.
Description
One, technical field
The utility model is a kind of non-fiber laser communication receiver that has adopted optical fiber collimator, belongs to the technical field of laser communication.
Two, background technology
The non-fiber laser communication is a kind of emerging communication technology.It has transmission rate height, bandwidth, easy for installation, transmission security good, cost is low, need not to apply for advantages such as frequency range.Can be widely used in aspects such as the backup of connection between building communication, last kilometer access, intranet or the local area network (LAN), fibre circuit and fault be emergent.
Therefore the non-fiber laser communication bigger difference of existence on communication mode of communicating by letter with optical-fiber laser, all exist bigger difference in the design of the design of communication device and communication plan.Because Fibre Optical Communication Technology has obtained using widely already, so existing communication device and communication plan mainly are to be used for optical fiber telecommunications system; And be used in the communication device of non-fiber laser communication aspect and communication plan seldom, need specialized designs.
In the non-fiber laser communication technology, receive mode commonly used at present is that incident light is converged on the reception target surface of photodiode, carries out opto-electronic conversion.Therefore, existing most of communication device and communication plan are difficult to be applied directly in the non-fiber laser communication.
Three, summary of the invention
1, technical problem
The purpose of this utility model provides a kind of non-fiber laser communication that is used for, thereby improves communication performance, reduces the non-fiber laser communication receiver of communications cost.
2, technical scheme
The utility model adopts the receiving device of optical fiber collimator as the non-fiber laser communication, formed by reception antenna and optical convergence device, reception antenna is made up of the object lens on the same optical axis, eyepiece, the optical convergence device adopts optical fiber collimator, this optical fiber collimator is positioned at a side of eyepiece, the object lens of reception antenna, eyepiece, optical fiber collimator all are arranged in shell, and same optical axis.Optical fiber collimator is made up of collimating lens, internal optical fiber, glass bushing, metal sleeve, tail optical fiber, the optical fiber connector, end in metal sleeve is provided with collimating lens, rear portion at collimating lens is connected with internal optical fiber, outside internal optical fiber, in the metal sleeve, be provided with glass bushing, one termination internal optical fiber of tail optical fiber, another termination optical fiber connector.
Optical fiber collimator mainly is made up of collimating lens (C-lens or GRIN lens) and optical fiber, can change the diverging light of optical fiber output into directional light, also the incident light that is parallel to optical axis can be coupled into optical fiber.The utility model utilization be exactly that the optical fiber collimator incident light that will be parallel to optical axis is coupled into optical fiber properties.
The available reception antenna of the utility model has Kepler telescope, Galilean telescope, Newtonian telescope, Gregory telescope, Cassegrainian telescope etc., and we are example with Kepler (Kepler) telescope in the design.Kepler telescope is made up of eyepiece and object lens, and the clear aperature of eyepiece is suitable with the clear aperature of optical fiber collimator, and the diameter of object lens is more than 50 times of clear aperature of eyepiece.Introducing telescopical purpose is the receiving area that strengthens incident light, improves the luminous power that receives.
The optical axis of optical fiber collimator and telescopical optical axis coincidence, optical fiber collimator is in telescopical eyepiece one side, and its collimating lens and telescopical eyepiece are approaching.In non-fiber laser communication process, from object lens incident, incident light according to telescopical optics operation principle, also is approximate directional light by the output light behind the eyepiece for approximate directional light to the flashlight by propagation in atmosphere along telescopical optical axis.This approximate directional light enters optical fiber collimator, and the collimating lens that sees through collimater is coupled into optical fiber, thereby has realized the reception of flashlight from the atmosphere to optical fiber.
Receiving device commonly used in the tail optical fiber of optical fiber collimator and the optical fiber communication is linked to each other, can carry out normal signal reception.Equally, the existing fiber communication plan can be incorporated in the non-fiber laser communication, for example, connect fiber grating, can realize the non-fiber laser communication of wavelength division multiplexing at the tail optical fiber of optical fiber collimator.
3, technique effect
The non-fiber laser communication reception technique of this employing optical fiber collimator that the utility model is designed has following several tangible advantage:
(1) the utility model adopts optical fiber collimator as receiving device, and optical fiber collimator has been very ripe product, therefore need not to carry out specialized designs.
(2) employing of optical fiber collimator can make the light path design of non-fiber laser communication gear become flexibly, simple.
(3) utilize optical fiber collimator, existing fiber optic telecommunications equipment can be applied to the non-fiber laser communication.
(4) utilize optical fiber collimator, existing optical fiber communication scheme can be applied to the non-fiber laser communication, for example wavelength division multiplexing (WDM).
Four, description of drawings
Fig. 1 receives structural representation for the non-fiber laser communication of adopting optical fiber collimator, comprising receiving a day receipts antenna 1, object lens 1a, eyepiece 1b, optical fiber collimator 2, collimating lens 2a, internal optical fiber 2b, glass bushing 2d, metal sleeve 2e, tail optical fiber 2f, optical fiber connector 2g, shell 3.
Five, embodiment
Non-fiber laser communication receiver of the present utility model, formed by reception antenna and optical convergence device, wherein reception antenna 1 is made up of the object lens 1a on the same optical axis, eyepiece 1b, the optical convergence device adopts optical fiber collimator 2, this optical fiber collimator 2 is positioned at the side of eyepiece 1b, the object lens 1a of reception antenna 1, eyepiece 1b, optical fiber collimator 2 all are arranged in shell 3, and same optical axis.Optical fiber collimator 2 is made up of collimating lens 2a, internal optical fiber 2b, glass bushing 2d, metal sleeve 2e, tail optical fiber 2f, optical fiber connector 2g, end in metal sleeve 2e is provided with collimating lens 2a, be connected with internal optical fiber 2b at the rear portion of collimating lens 2a, outside internal optical fiber 2b, in the metal sleeve 2e, be provided with glass bushing 2d, the termination internal optical fiber 2b of tail optical fiber 2f, another termination optical fiber connector 2g.
The diameter of optical receiver antenna (is example with the Kepler telescope) object lens is 50mm, and its all areas all are used to receive incident light; The diameter of eyepiece is several millimeters, but its effective aperture that is used for logical light is about 1.0mm, with effective clear aperature consistent size of optical fiber collimator.The focal distance f 1 of object lens is 50: 1 with the ratio of the focal distance f 2 of eyepiece.
The optical axis of optical fiber collimator overlaps fully with telescopical optical axis, and collimater is in telescopical eyepiece 1b one side, and the incident end and the telescopical eyepiece of collimater are approaching.The clear aperature of the optical fiber collimator that we adopted is of a size of about 1.0mm.
In non-fiber laser communication process, from object lens 1a incident, incident light is approximate directional light to the flashlight by propagation in atmosphere, also is approximate directional light by the output light behind the eyepiece 1b along the optical axis of reception antenna.This approximate directional light enters optical fiber collimator, sees through collimating lens 2a and is coupled into internal optical fiber 2b, thereby realized the reception of flashlight from the atmosphere to optical fiber.
Receiving device commonly used in the tail optical fiber 2f of optical fiber collimator and the optical fiber communication is linked to each other, can carry out normal signal reception.Equally, the existing fiber communication plan can be incorporated in the non-fiber laser communication, for example, connect fiber grating, can realize the non-fiber laser communication of wavelength division multiplexing at the tail optical fiber 2f of optical fiber collimator.
The calculating of acceptance angle:
In the statement in front, we suppose that the incident light that telescopical object lens 1a receives is approximately parallel; And in the reality, incident light has certain angle of divergence.
If the angle of incident ray and telescopical optical axis is θ
1, and be θ from the light of telescope ocular 1b outgoing and the angle of telescopical optical axis
2According to telescopical geometric optical theory, telescopical angular magnification (r
p) equal objective focal length (f
1) and eyepiece focal length (f
2) ratio.And we design the focal distance f of object lens
1Focal distance f with eyepiece
2Ratio be 50: 1, promptly
So, as can be known
θ
2=50 θ
1(2) promptly by behind the telescope, the angle of divergence of flashlight has been exaggerated 50 times.
And optical fiber collimator has certain acceptance angle scope, with present common multimode fiber collimater is example, its acceptance angle maximum can reach 1.10 ° (i.e. 19.30 milliradians), the maximum angle that can receive light and optical axis is 0.55 ° (i.e. 9.65 milliradians), all can by optical fiber collimator be coupled into optical fiber in this scope with interior incident light with the angle of optical axis.Can get according to formula (2)
Promptly the angle with the optical axis of reception antenna all can be coupled into optical fiber by the reception antenna optical fiber collimator in this scope with interior incident light.So the receiving angle of reception antenna is θ
1Twice, i.e. 0.386 milliradian.This acceptance angle can receive fully in engineering design and in using.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032782659U CN2645350Y (en) | 2003-09-02 | 2003-09-02 | Non-optical-fiber laser communication receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032782659U CN2645350Y (en) | 2003-09-02 | 2003-09-02 | Non-optical-fiber laser communication receiver |
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| CN2645350Y true CN2645350Y (en) | 2004-09-29 |
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| CNU032782659U Expired - Fee Related CN2645350Y (en) | 2003-09-02 | 2003-09-02 | Non-optical-fiber laser communication receiver |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458362B (en) * | 2009-01-04 | 2010-06-09 | 上海大学 | A wireless optical communication transmitting antenna with adjustable beam divergence angle |
| CN101707502B (en) * | 2009-11-13 | 2012-07-18 | 南京邮电大学 | Wireless communication light receiving antenna |
| CN101399610B (en) * | 2008-01-22 | 2013-05-29 | 长春理工大学 | A Method for Automatic Axis Correction of Atmospheric Laser Communication System |
| CN105588663A (en) * | 2016-03-11 | 2016-05-18 | 武汉理工大学 | Temperature online monitoring device for crosshead and connecting rod of reciprocating compressor |
| CN108139541A (en) * | 2015-09-30 | 2018-06-08 | 索尼公司 | Optical communication connector, optic communication cable and electronic equipment |
-
2003
- 2003-09-02 CN CNU032782659U patent/CN2645350Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399610B (en) * | 2008-01-22 | 2013-05-29 | 长春理工大学 | A Method for Automatic Axis Correction of Atmospheric Laser Communication System |
| CN101458362B (en) * | 2009-01-04 | 2010-06-09 | 上海大学 | A wireless optical communication transmitting antenna with adjustable beam divergence angle |
| CN101707502B (en) * | 2009-11-13 | 2012-07-18 | 南京邮电大学 | Wireless communication light receiving antenna |
| CN108139541A (en) * | 2015-09-30 | 2018-06-08 | 索尼公司 | Optical communication connector, optic communication cable and electronic equipment |
| CN108139541B (en) * | 2015-09-30 | 2020-02-28 | 索尼公司 | Optical communication connector, optical communication cable, and electronic device |
| CN105588663A (en) * | 2016-03-11 | 2016-05-18 | 武汉理工大学 | Temperature online monitoring device for crosshead and connecting rod of reciprocating compressor |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |