CN102347796A - Optical fiber connection method, optical fiber transmitter, optical fiber receiver and optical fiber connection system - Google Patents
Optical fiber connection method, optical fiber transmitter, optical fiber receiver and optical fiber connection system Download PDFInfo
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- CN102347796A CN102347796A CN2010102444579A CN201010244457A CN102347796A CN 102347796 A CN102347796 A CN 102347796A CN 2010102444579 A CN2010102444579 A CN 2010102444579A CN 201010244457 A CN201010244457 A CN 201010244457A CN 102347796 A CN102347796 A CN 102347796A
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Abstract
The invention provides an optical fiber connection method, an optical fiber transmitter, an optical fiber receiver and an optical fiber connection system and belongs to the field of optical signal transmission of a free space. The optical fiber connection method comprises the following steps that: a first coupler couples an optical signal which is input through an optical fiber communication network into an optical amplifier; the optical amplifier directly amplifies the intensity of the optical signal, and a second coupler couples the processed optical signal into an optical transmitting module; and the optical transmitting module transmits the optical signal which comes from the optical amplifier to the free space in a multi-channel mode for transmission, so that the optical fiber transparent transmission of the free space is realized, and the applicability of optical fiber connection in an optical communication network is improved.
Description
Technical field
The invention belongs to the free space optical field of signal transmissions, relate in particular to a kind of optical fibre connecting method, fibre optic transmitter, fibre optic receiver and fibre junction system that is applied to EPON (PON, Passive Optical Network).
Background technology
Along with the tide of IPization, Networks of Fiber Communications has developed into the inexorable trend to the quick transition of PON from traditional SDH (Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) at present.SDH is a kind of with the transmission of multiple connection, circuit and function of exchange combines together and transmit network by the integrated information of united net management system operation.And PON mainly contains GPON (Gigabit-Capable PON, Gigabit Passive Optical Network) and EPON (Ethernet-PON, ethernet passive optical network), is a kind of Wideband optical fiber access technology.
PON compares with traditional SDH system, and host-host protocol is different fully, and the network form of the composition and technical specification variation especially have the difference of the order of magnitude all very greatly on the uplink and downlink transmission rate.This explanation is difficult to unification and makes the problem that connection device can't be pervasive thereby will run into communication protocol and technical specification when needing to adopt other communication mode conduct except that optical fiber to continue in the certain distance of some links of dissimilar Networks of Fiber Communications or inserting means.For example the free space optical communication based on the SDH Frame Design in the market (Free Space Optical Communication is called for short FSO) device just can not be applicable to the PON host-host protocol.
Therefore, how to obtain the technical scheme that a kind of optical fiber communication transparent transmission that can be applicable to the extensive use occasion continues, seem particularly necessary.
Summary of the invention
In order to address the above problem, the purpose of this invention is to provide a kind of optical fibre connecting method, fibre optic transmitter, fibre optic receiver and fibre junction system, realize the light signal transparent transmission of free space, improved the applicability of fibre junction in optical communication network.
In order to achieve the above object, the present invention provides a kind of optical fibre connecting method, is applied to the fibre optic transmitter side, and said optical fibre connecting method comprises:
Be coupled in the image intensifer through the light signal of first coupler the Networks of Fiber Communications input;
Said image intensifer carries out the direct processing and amplifying of light signal strength to said light signal, and the said light signal after will handling through second coupler is coupled to light emission module;
Said light emission module will be from the said light signal of said image intensifer, is emitted to free space with the form of multichannel and transmits.
Preferably, said method also comprises:
Through automated power control said image intensifer is carried out power control, make said image intensifer keep stable average optical output power.
Preferably, it is characterized in that said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
The present invention also provides a kind of fibre optic transmitter, comprising:
First coupler is used for the light signal of Networks of Fiber Communications input is coupled to image intensifer;
Image intensifer is connected with said first coupler, is used for said light signal is carried out the direct processing and amplifying of light signal strength;
Second coupler is connected with said image intensifer, is used for the said light signal after the processing and amplifying is coupled to light emission module;
Light emission module is connected with said second coupler, is used for the said light signal from said image intensifer, is emitted to free space with the form of multichannel and transmits.
Preferably, said fibre optic transmitter also comprises:
Feedback control loop is connected with said image intensifer with said first coupler, said second coupler respectively, is used to utilize automated power control, controls said image intensifer and keeps stable average optical output power.
Preferably, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
Preferably, said light emission module comprises:
Optical branching device is used for said light signal demultiplexing emission light beam is transmitted;
The light beam expander is connected with said optical branching device, is used for the aperture of said emission light beam is enlarged, to reduce the angle of divergence;
Optical collimator is connected with said smooth beam expander, is used for said emission light beam is projected free space with the direction of confirming.
The present invention also provides a kind of optical fibre connecting method, is applied to the fibre optic receiver side, and said optical fibre connecting method comprises:
Optical Receivers receives from the multipath light signal in the free space, and is coupled in the image intensifer through the said light signal that the 3rd coupler will receive;
Said image intensifer carries out the direct processing and amplifying of light signal strength to the said light signal from said Optical Receivers;
The said light signal that will pass through after the processing and amplifying through the 4th coupler is coupled in the Networks of Fiber Communications.
Preferably, said method also comprises:
Through automated power control said image intensifer is carried out power control, make said image intensifer keep stable average optical output power.
Preferably, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
The present invention also provides a kind of fibre optic receiver, comprising:
Optical Receivers is used for receiving the multipath light signal from free space;
The 3rd coupler is connected with said Optical Receivers, and the said light signal that is used for receiving is coupled to image intensifer;
Image intensifer is connected with said the 3rd coupler, is used for the said light signal from said Optical Receivers is carried out the direct processing and amplifying of light signal strength;
The 4th coupler is connected with said image intensifer, is used for being coupled to Networks of Fiber Communications through the said light signal after the processing and amplifying.
Preferably, said fibre optic receiver also comprises:
Feedback control loop is connected with said image intensifer with said the 3rd coupler, said the 4th coupler respectively, is used to utilize automated power control, controls said image intensifer and keeps stable average optical output power.
Preferably, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
Preferably, Optical Receivers comprises:
Focus lens group is used to converge said multipath light signal;
Optical combiner is connected with said focus lens group, and the multipath light signal that is used for receiving pools one road light signal.
The present invention also provides a kind of fibre junction system, comprising: fibre optic transmitter, fibre optic receiver and collimating module, said collimating module are used between said fibre optic transmitter and fibre optic receiver, carrying out the collimation adjustment of optical signal transmitting/reception, wherein
Said fibre optic transmitter comprises:
First coupler is used for the light signal of Networks of Fiber Communications input is coupled to image intensifer;
First image intensifer is connected with said first coupler, is used for said light signal is carried out the direct processing and amplifying of light signal strength;
Second coupler is connected with said first image intensifer, is used for the said light signal after the processing and amplifying is coupled to light emission module;
Light emission module is connected with said second coupler, is used for the said light signal from said first image intensifer, is emitted to free space with the form of multichannel and transmits;
Said fibre optic receiver comprises:
Optical Receivers is used for receiving the multipath light signal from free space;
The 3rd coupler is connected with said Optical Receivers, and the said light signal that is used for receiving is coupled to image intensifer;
Second image intensifer is connected with said the 3rd coupler, is used for the said light signal from said Optical Receivers is carried out the direct processing and amplifying of light signal strength;
The 4th coupler is connected with said second image intensifer, is used for being coupled to Networks of Fiber Communications through the said light signal after the processing and amplifying.
Can know by technique scheme; Through the direct amplifying technique of the light that utilizes image intensifer; Light signal in the optical communication network is carried out processing and amplifying; Light signal after make handling can see through hundreds of rice to several kilometers freedom (atmosphere) space and realize continuing of point-to-point, point-to-multipoint or multi-multipoint each link of optical fiber communication; Traditional optical communication continue photoelectricity, electro-optical signal conversion process in the link have been avoided; Realize the light signal transparent transmission of free space, improved the applicability of fibre junction in optical communication network.
Description of drawings
Fig. 1 is for being applied to the flow chart of the optical fibre connecting method of fibre optic transmitter side in the embodiments of the invention;
Fig. 2 is the structured flowchart of fibre optic transmitter in the embodiments of the invention;
Fig. 3 is the sketch map of Y type optical branching device in the embodiments of the invention;
Fig. 4 is the sketch map of Y type optical combiner in the embodiments of the invention;
Fig. 5 is the theory diagram of the fibre optic transmitter in continuing based on the optical fiber space of OA (image intensifer) in the embodiments of the invention;
Fig. 6 is for being applied to the flow chart of the optical fibre connecting method of fibre optic receiver side in the embodiments of the invention;
Fig. 7 is the structured flowchart of fibre optic receiver in the embodiments of the invention;
Fig. 8 is the theory diagram of the fibre optic receiver (employing semiconductor optical amplifier) in continuing based on the optical fiber space of OA in the embodiments of the invention;
Fig. 9 in the embodiments of the invention based on the continue theory diagram of middle fibre optic receiver (employing erbium-doped fiber amplifier) of the optical fiber space of OA;
Figure 10 is based on the application scenario sketch map of the optical fiber space connecting system of OA in the embodiments of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer,, the embodiment of the invention is done explanation in further detail below in conjunction with embodiment and accompanying drawing.At this, illustrative examples of the present invention and explanation are used to explain the present invention, but not as to qualification of the present invention.
Fibre optic transmitter side from optical communication network and fibre optic receiver side respectively below; Introduce enforcement of the present invention; That wherein embodiment one introduces is the fibre junction embodiment of fibre optic transmitter side, and that embodiment two introduces is the fibre junction embodiment of fibre optic receiver side.
Embodiment one
Referring to Fig. 1, be the flow chart of the optical fibre connecting method that is applied to the fibre optic transmitter side in the embodiments of the invention, concrete steps are following:
Step 101, the light signal of Networks of Fiber Communications being imported through first coupler are coupled in the image intensifer;
This first coupler is used for the light signal of Networks of Fiber Communications input is carried out optical coupled, and the light signal that this Networks of Fiber Communications is imported is coupled in the image intensifer, does not limit the concrete structure of this first coupler in the present embodiment.
Step 102, image intensifer are carried out the direct processing and amplifying of light signal strength to this light signal, and the light signal after will handling through second coupler is coupled to light emission module;
In the present embodiment, this image intensifer can be semiconductor optical amplifier (SOA) or erbium-doped fiber amplifier (EDFA), and applicable wavelengths contains SDH (1550nm) and PON fiber optic network signal wavelengths such as (descending 1490nm, up 1310nm).
In the present embodiment, this image intensifer is strengthened to the suitable order of magnitude with light signal strength through the mode that light directly amplifies.Above-mentioned light signal strength can be confirmed according to the distance of optical signal transmission.
When the design transmission range is 5Km; Desired optical gain needs greater than 60dB (decibel), and can adopt the cascading semiconductor image intensifer this moment, just the mode of multistage (for example 5 grades) half-open chamber of semiconductor with series connection is made up; Unified control pumping such as, thereby obtain enough optical gains.
When required optical gain was little, this amplifier can be selected the single-stage semiconductor optical amplifier for use, for example can select erbium-doped fiber amplifier for use.
The effect of above-mentioned second coupler is that the light signal after the processing and amplifying is coupled in the light emission module, does not limit the concrete structure of this second coupler in the present embodiment.
Step 103, light emission module will be emitted to free space with the form of multichannel from the light signal of image intensifer and transmit.
In the present embodiment, can adopt the form of four tunnel emissions that light signal is emitted in the free space.Certainly also be not limited to four the tunnel.
Adopt four tunnel form emission light signal; Be in order to reduce the influence that atmospheric turbulance and vibration bring to light signal; Simultaneously also be in order to reduce of the influence of factor such as climatic environment, to improve the reliability of signal transmission to greatest extent to point-to-point optical signal transmission quality.
For example, the light signal that will pass through after the processing and amplifying is coupled to 1 * 4 optical branching device, through the light beam expander emission light beam aperture is enlarged processing then, to reduce the angle of departure, utilizes optical collimator will launch light beam at last and projects in the free space with definite direction.
Certainly, when utilizing optical collimator to confirm the transmit direction of emission light beam, can adopt the technology of four tunnel interlock collimations to adjust, promptly realize disposable adjustment success, efficiently solve the adjustment problem of multichannel light beam space parallel transmission.
In the present embodiment; Because the running parameter of electric lighting system and efficient can be in time and environment generation conversion; Therefore in said method, also comprise: through automated power control (APC) this image intensifer is carried out power control, make this image intensifer keep stable average optical output power.
Can know by technique scheme; Through the direct amplifying technique of the light that utilizes image intensifer; Light signal in the optical communication network is carried out processing and amplifying; Make the light signal after handling to realize point-to-point through hundreds of rice to several kilometers freedom (atmosphere) space; Continuing of point-to-multipoint or multi-multipoint each link of optical fiber communication; Avoided traditional optical communication photoelectricity in the link that continues; The electro-optical signal conversion process; Realize the transparent transmission of free space; Improved the applicability of fibre junction in optical communication network, for example applicable to PDH; SDH; GPON; Each communication link of various optical-fiber networks such as EPON.
Referring to Fig. 2, be the structured flowchart of fibre optic transmitter in the embodiments of the invention, this fibre optic transmitter comprises:
First coupler 21 is used for the light signal of Networks of Fiber Communications input is coupled to image intensifer 22;
Image intensifer 22 is connected with first coupler 21, is used for light signal is carried out the direct processing and amplifying of light signal strength;
In an embodiment of the present invention, this image intensifer 22 can be selected semiconductor optical amplifier for use, also can select erbium-doped fiber amplifier for use.
These image intensifer 22 applicable wavelengths contain SDH (1550nm) and PON fiber optic network signal wavelengths such as (descending 1490nm, up 1310nm).Through the direct amplifying technique of light is applied to space optical communication; Abandon traditional photoelectricity, electro-optical signal conversion links fully, avoided the technical failure that to bring such as a series of problems such as signal pulse assurance degree, electronic circuit bandwidth, photoelectricity/electro-optical device performance, signal link stability.
Second coupler 23 is connected with image intensifer 22, is used for the light signal after the processing and amplifying is coupled to light emission module 24;
Light emission module 24, be connected, be used for the light signal from image intensifer 22 is emitted to free space with travelling of multichannel and transmits with second coupler 23.
In another embodiment of the present invention, this fibre optic transmitter also comprises:
Feedback control loop 25 is connected with image intensifer 22 with first coupler 21, second coupler 23 respectively, is used to utilize automated power control, controls this image intensifer 22 and keeps stable average optical output power.
In another embodiment of the present invention, this light emission module 24 comprises:
Optical branching device is used for light signal demultiplexing emission light beam is transmitted, and for example can select 1 * 4 optical branching device for use, is about to this light signal and is divided into 4 tunnel emission light beams and transmits.
The light beam expander is connected with optical branching device, is used for the aperture of emission light beam is enlarged, to reduce the angle of divergence;
Optical collimator is connected with the light beam expander, is used for the emission light beam is projected free space with the direction of confirming.
In the present embodiment; The function of first coupler 21 and second coupler 23 is not limited to above-mentioned function, and for example this first coupler 21 and second coupler 23 can have following function simultaneously: 1) communication network optical fiber input signal is coupled in the image intensifer; 2) light signal that image intensifer is exported is coupled in the optical fiber of communication network; 3) separate the required control wave of drive feedback control loop.
In order to reach the requirement of above-mentioned functions simultaneously, first coupler 21 and second coupler 23 can adopt condenser lens, GRIN Lens, y-type optical fiber splitter and y-type optical fiber mixer to combine.Referring to Fig. 3 and Fig. 4, be respectively the structural representation of y-type optical fiber splitter and y-type optical fiber mixer, the y-type optical fiber splitter wherein light signal through behind the y-type optical fiber splitter, the one tunnel through behind the lens to optical cavity, another road through lens to Photoelectric Detection.In the y-type optical fiber mixer, in Er-doped fiber, another road light signal gets into the y-type optical fiber mixer through GRIN Lens to one road light signal, enters into Er-doped fiber then through the y-type optical fiber mixer.
Referring to Fig. 5; The schematic diagram of the fibre optic transmitter in continuing based on the optical fiber space of OA in the embodiments of the invention; By knowing among the figure; Light signal in the optical fiber is coupled in the cascaded semiconductor chamber; The direct processing and amplifying of light signal strength is carried out in the cascaded semiconductor chamber to this light signal; And the light signal after the processing and amplifying is coupled to light emission module, light emission module is transmitted into the form of light signal with multichannel in the free space.
In order to make the light amplification module keep stable average optical output power; Can be connected a feedback control loop with output (coupler interface) at the input in cascaded semiconductor chamber, this feedback control loop is used for automated power control (APC) is carried out in the cascaded semiconductor chamber.Photodetection among the figure can be used for from light signal, separating the required control wave of feedback control loop.
Embodiment two
Referring to Fig. 6, be the flow chart of the optical fibre connecting method that is applied to the fibre optic receiver side in the embodiments of the invention, concrete steps are following:
Step 601, Optical Receivers receive the multipath light signal from free space, and through the 3rd coupler the light signal that receives are coupled in the image intensifer;
Through Optical Receivers the light beam in the free space is collected, focused on, and multipath light signal is synthesized one the tunnel, be coupled in the image intensifer through the 3rd coupler.
For example, can be corresponding with the fibre optic transmitter side, adopt four road light diversity receptions, receive the influence that brings to light signal to reduce atmospheric turbulance and vibration or other environmental factors.Four road light signals that receive are transferred to the output of 4 * 1 optical combiners respectively after making up through optical focusing lens, enter into the semiconductor cavity or the Er-doped fiber of image intensifer then through the 3rd coupler.
Step 602, image intensifer are to carrying out the direct processing and amplifying of light signal strength from the light signal in the Optical Receivers;
This image intensifer can be selected semiconductor optical amplifier or erbium-doped fiber amplifier (EDFA) for use.Applicable wavelengths contains SDH (1550nm) and PON fiber optic network signal wavelengths such as (descending 1490nm, up 1310nm).Adopt EDFA to realize that the form of fibre junction working state of system and light signal is irrelevant, and needn't be directed to any specific standard signal, be applicable to nearly all optical communication occasion and various standard network.
In the present embodiment, this image intensifer is strengthened to the suitable order of magnitude with light signal strength through the mode that light directly amplifies.Above-mentioned light signal strength can be confirmed according to the distance of optical signal transmission.
When the design transmission range is 5Km; Desired optical gain needs greater than 60dB (decibel), and can adopt the cascading semiconductor image intensifer this moment, just the mode of multistage (for example 5 grades) half-open chamber of semiconductor with series connection is made up; Unified control pumping such as, thereby obtain enough optical gains.
When required optical gain was little, this amplifier can be selected the single-stage semiconductor optical amplifier for use, for example can select erbium-doped fiber amplifier for use.Can adopt erbium-doped fiber amplifier to being that the burst type light signal of representative carries out synchronous/asynchronous and directly amplifies with GPon (upward signal) in the present embodiment.
Step 603, the light signal that will pass through after the processing and amplifying through the 4th coupler are coupled in the Networks of Fiber Communications.
In the present embodiment; Because the running parameter of electric lighting system and efficient can be in time and environment generation conversion; Therefore in said method, also can comprise: through automated power control (APC) this image intensifer is carried out power control, make this image intensifer keep stable average optical output power.
Can know by technique scheme; Straight discharge technique through utilizing image intensifer carries out processing and amplifying to the light signal in the optical communication network; Light signal after make handling can see through hundreds of rice to several kilometers freedom (atmosphere) space and realize continuing of point-to-point, point-to-multipoint or multi-multipoint each link of optical fiber communication; Traditional optical communication continue photoelectricity, electro-optical signal conversion process in the link have been avoided; Realize the transparent transmission of free space, improved the applicability of fibre junction in optical communication network.
Referring to Fig. 7, be the structured flowchart of fibre optic receiver in the embodiments of the invention, this fibre optic receiver comprises:
Optical Receivers 71 is used for receiving the multipath light signal from free space;
The 3rd coupler 72 is connected with this Optical Receivers 71, and the light signal that is used for receiving is coupled to image intensifer 73;
Image intensifer 73 is connected with the 3rd coupler 72, is used for the light signal from Optical Receivers is carried out the direct processing and amplifying of light signal strength;
The 4th coupler 74 is connected with image intensifer 73, is used for being coupled to Networks of Fiber Communications through the light signal after the processing and amplifying.
In another embodiment of the present invention, Optical Receivers 71 comprises:
Focus lens group is used to converge said multipath light signal;
Optical combiner is connected with said focus lens group, and the multipath light signal that is used for receiving pools one road light signal; And
The spike interference filter group is used for the non-flashlight of filtering.
In the present embodiment, Optical Receivers 71 is used for the spatial beam signal that fibre optic transmitter sends is collected, focused on, and leads up to the 3rd coupler 72 and send in the image intensifer 73 multipath light signal is synthetic.
For example, with being transferred to the output of 4 * 1 optical combiners respectively after four road light signals process optical focusing lens group that receives, get in the semiconductor cavity or Er-doped fiber of image intensifers 73 through the 3rd coupler 72 then.
Above-mentioned optical focusing lens group is made up of many set of contact lenses, comprises sunlight filter, spectrum filter and outer optical lens.Above-mentioned each parts are accomplished the light wave that four link transmission the are come reception that superposes with optical combiner.
In the present embodiment, can select for use F-P interference fringe filter as filter, have the high peak transmission and the good characteristics such as long-wavelength cut-off of broad, tandem arrangement is formed simple filter, can change the shape of filter passband.The centre wavelength of the logical filter system of F-P interference fringe is regulated definite according to the optical fiber communication optical wavelength.
In another embodiment of the present invention, fibre optic receiver also comprises:
Feedback control loop 75 is connected with said image intensifer 73 with said the 3rd coupler 72, said the 4th coupler 74 respectively, is used to utilize automated power control, controls said image intensifer 73 and keeps stable average optical output power.
In the present embodiment; The function of the 3rd coupler 72 and the 4th coupler 74 is not limited to above-mentioned function, and for example the 3rd coupler 72 and the 4th coupler 74 can have following function simultaneously: 1) communication network optical fiber input signal is coupled in the image intensifer; 2) light signal that image intensifer is exported is coupled in the optical fiber of communication network; 3) separate the required control wave of drive feedback control loop.
In order to reach the requirement of above-mentioned functions simultaneously, the 3rd coupler 72 and the 4th coupler 74 can adopt condenser lens, GRIN Lens, y-type optical fiber splitter and y-type optical fiber mixer to combine.Referring to Fig. 3 and Fig. 4, be respectively the structural representation of y-type optical fiber splitter and y-type optical fiber mixer.
Referring to Fig. 8; Theory diagram for the fibre optic receiver in continuing based on the optical fiber space of OA in the embodiments of the invention (adopting SOA); By knowing among the figure; Receive the multipath light signal in the free space through Optical Receivers; And the light signal after will handling is coupled to the direct processing and amplifying that light signal strength is carried out in the cascaded semiconductor chamber, then the light signal after the processing and amplifying is coupled to the fiber communication network.In order to make light amplification module (cascaded semiconductor chamber) keep stable average optical output power; Can be connected a feedback control loop with output (coupler interface) at the input in cascaded semiconductor chamber, this feedback control loop is used for automated power control (APC) is carried out in the cascaded semiconductor chamber.Through the photodetection among the figure, from light signal, separate the required control wave of feedback control loop.
Referring to Fig. 9; For in the embodiments of the invention based on the continue theory diagram of middle fibre optic receiver (adopt EDFA) of the optical fiber space of OA; By knowing among the figure; Receive the multipath light signal in the free space through Optical Receivers; And the light signal after will handling is coupled to the direct processing and amplifying that Er-doped fiber carries out light signal strength, then the light signal after the processing and amplifying is coupled to the fiber communication network.In order to make light amplification module (Er-doped fiber) keep stable average optical output power; Can be connected a feedback control loop with output (coupler interface) at the input in cascaded semiconductor chamber, this feedback control loop is used for automated power control is carried out in the cascaded semiconductor chamber.
A kind of fibre junction system also is provided in an embodiment of the present invention; This fibre junction system comprises: fibre optic transmitter, fibre optic receiver and collimating module; Said collimating module is used between said fibre optic transmitter and fibre optic receiver, carrying out the collimation adjustment of optical signal transmitting/reception, wherein
Said fibre optic transmitter comprises:
First coupler is used for the light signal of Networks of Fiber Communications input is coupled to image intensifer;
First image intensifer is connected with first coupler, is used for said light signal is carried out the direct processing and amplifying of light signal strength;
Second coupler is connected with first image intensifer, is used for the said light signal after the processing and amplifying is coupled to light emission module;
Light emission module is connected with second coupler, is used for the said light signal from said first image intensifer, is emitted to free space with the form of multichannel and transmits;
Said fibre optic receiver comprises:
Optical Receivers is used for receiving the multipath light signal from free space;
The 3rd coupler is connected with said Optical Receivers, and the said light signal that is used for receiving is coupled to image intensifer;
Second image intensifer is connected with said the 3rd coupler, is used for the said light signal from said Optical Receivers is carried out the direct processing and amplifying of light signal strength;
The 4th coupler is connected with said second image intensifer, is used for being coupled to Networks of Fiber Communications through the said light signal after the processing and amplifying.
In the present embodiment, this system also comprises a system control equipment, and this system control equipment can have following function:
1) intensity to the light signal that receives detects, and is used for monitoring in real time the receiving and transmitting signal quality, so that the adjustment fibre optic receiver obtains optimum reception;
2) alarm signal is sent in signal overloading indication, the light signal that is used for receiving at fibre optic receiver when transshipping;
3) dropout indication is used for when fibre optic receiver detects dropout or serious error code, sending warning.
In the present embodiment, this system control equipment also can adopt the embedded Control technology, selects single-chip microcomputer to realize above-mentioned functions.
Above-mentioned collimating module adopts parallel visible laser bundle of axle and auxiliary telescope mode to realize the aiming and the collimation of light beam.
Figure 10 is the application scenario sketch map of fibre junction system in the embodiments of the invention, shown native system can be applied at a high speed (＞1Gbps) or each stage of low speed Networks of Fiber Communications.
When the optical fiber of any link needs the usage space transmission as continuing or when inserting means; Can light signal directly be coupled into this fibre junction system through optical fiber interface; Then through light emission module with four road spatial beams with optical signal transmission to certain distance; Receive also by the four-way Optical Receivers again and after four unification couplers are assembled, light signal is coupled to the light amplification module, through once directly directly being coupled into network fiber after the optics processing and amplifying (requiring selection semiconductor optical amplifier SOA or erbium-doped fiber amplifier EDFA) according to different techniques.As intercommunication system,, will get into network fiber through said process equally from the spatial light signal at another terminal.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be considered as protection scope of the present invention.
Claims (15)
1. an optical fibre connecting method is applied to the fibre optic transmitter side, it is characterized in that, said optical fibre connecting method comprises:
Be coupled in the image intensifer through the light signal of first coupler the Networks of Fiber Communications input;
Said image intensifer carries out the direct processing and amplifying of light signal strength to said light signal, and the said light signal after will handling through second coupler is coupled to light emission module;
Said light emission module will be from the said light signal of said image intensifer, is emitted to free space with the form of multichannel and transmits.
2. optical fibre connecting method according to claim 1 is characterized in that, said method also comprises:
Through automated power control said image intensifer is carried out power control, make said image intensifer keep stable average optical output power.
3. optical fibre connecting method according to claim 2 is characterized in that, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
4. a fibre optic transmitter is characterized in that, comprising:
First coupler is used for the light signal of Networks of Fiber Communications input is coupled to image intensifer;
Image intensifer is connected with said first coupler, is used for said light signal is carried out the direct processing and amplifying of light signal strength;
Second coupler is connected with said image intensifer, is used for the said light signal after the processing and amplifying is coupled to light emission module;
Light emission module is connected with said second coupler, is used for the said light signal from said image intensifer, is emitted to free space with the form of multichannel and transmits.
5. fibre optic transmitter according to claim 4 is characterized in that, said fibre optic transmitter also comprises:
Feedback control loop is connected with said image intensifer with said first coupler, said second coupler respectively, is used to utilize automated power control, controls said image intensifer and keeps stable average optical output power.
6. fibre optic transmitter according to claim 5 is characterized in that, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
7. fibre optic transmitter according to claim 4 is characterized in that, said light emission module comprises:
Optical branching device is used for said light signal demultiplexing emission light beam is transmitted;
The light beam expander is connected with said optical branching device, is used for the aperture of said emission light beam is enlarged, to reduce the angle of divergence;
Optical collimator is connected with said smooth beam expander, is used for said emission light beam is projected free space with the direction of confirming.
8. an optical fibre connecting method is applied to the fibre optic receiver side, it is characterized in that, said optical fibre connecting method comprises:
Optical Receivers receives from the multipath light signal in the free space, and is coupled in the image intensifer through the said light signal that the 3rd coupler will receive;
Said image intensifer carries out the direct processing and amplifying of light signal strength to the said light signal from said Optical Receivers;
The said light signal that will pass through after the processing and amplifying through the 4th coupler is coupled in the Networks of Fiber Communications.
9. optical fibre connecting method according to claim 8 is characterized in that, said method also comprises:
Through automated power control said image intensifer is carried out power control, make said image intensifer keep stable average optical output power.
10. optical fibre connecting method according to claim 9 is characterized in that, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
11. a fibre optic receiver is characterized in that, comprising:
Optical Receivers is used for receiving the multipath light signal from free space;
The 3rd coupler is connected with said Optical Receivers, and the said light signal that is used for receiving is coupled to image intensifer;
Image intensifer is connected with said the 3rd coupler, is used for the said light signal from said Optical Receivers is carried out the direct processing and amplifying of light signal strength;
The 4th coupler is connected with said image intensifer, is used for being coupled to Networks of Fiber Communications through the said light signal after the processing and amplifying.
12. fibre optic receiver according to claim 11 is characterized in that, said fibre optic receiver also comprises:
Feedback control loop is connected with said image intensifer with said the 3rd coupler, said the 4th coupler respectively, is used to utilize automated power control, controls said image intensifer and keeps stable average optical output power.
13. fibre optic receiver according to claim 12 is characterized in that, said image intensifer is semiconductor optical amplifier or erbium-doped fiber amplifier.
14. fibre optic receiver according to claim 11 is characterized in that, Optical Receivers comprises:
Focus lens group is used to converge said multipath light signal;
Optical combiner is connected with said focus lens group, and the multipath light signal that is used for receiving pools one road light signal.
15. a fibre junction system is characterized in that, comprising: fibre optic transmitter, fibre optic receiver and collimating module, said collimating module are used between said fibre optic transmitter and fibre optic receiver, carrying out the collimation adjustment of optical signal transmitting/reception, wherein
Said fibre optic transmitter comprises:
First coupler is used for the light signal of Networks of Fiber Communications input is coupled to image intensifer;
First image intensifer is connected with said first coupler, is used for said light signal is carried out the direct processing and amplifying of light signal strength;
Second coupler is connected with said first image intensifer, is used for the said light signal after the processing and amplifying is coupled to light emission module;
Light emission module is connected with said second coupler, is used for the said light signal from said first image intensifer, is emitted to free space with the form of multichannel and transmits;
Said fibre optic receiver comprises:
Optical Receivers is used for receiving the multipath light signal from free space;
The 3rd coupler is connected with said Optical Receivers, and the said light signal that is used for receiving is coupled to image intensifer;
Second image intensifer is connected with said the 3rd coupler, is used for the said light signal from said Optical Receivers is carried out the direct processing and amplifying of light signal strength;
The 4th coupler is connected with said second image intensifer, is used for being coupled to Networks of Fiber Communications through the said light signal after the processing and amplifying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102444579A CN102347796A (en) | 2010-08-03 | 2010-08-03 | Optical fiber connection method, optical fiber transmitter, optical fiber receiver and optical fiber connection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102444579A CN102347796A (en) | 2010-08-03 | 2010-08-03 | Optical fiber connection method, optical fiber transmitter, optical fiber receiver and optical fiber connection system |
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| CN115567112A (en) * | 2022-09-15 | 2023-01-03 | 国网山东省电力公司五莲县供电公司 | Optical fiber signal transmission system based on multi-pass amplification |
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Application publication date: 20120208 |