CN202190272U - Simulated optical fiber repeater applied in engineering - Google Patents
Simulated optical fiber repeater applied in engineering Download PDFInfo
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- CN202190272U CN202190272U CN2011203235570U CN201120323557U CN202190272U CN 202190272 U CN202190272 U CN 202190272U CN 2011203235570 U CN2011203235570 U CN 2011203235570U CN 201120323557 U CN201120323557 U CN 201120323557U CN 202190272 U CN202190272 U CN 202190272U
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Abstract
The utility model relates to a simulated optical fiber repeater applied in an engineering, which is characterized in that an optical near-end machine and an optical far-end machine are optimally designed, so that a semiconductor laser assembly circuit is reasonably designed and controlled, according to the actual application condition of the engineering environment, the optical near-end machine and the optical far-end machine are provided with an optical receiving and acquisition circuit respectively, then the optical receiving and acquisition circuits carry out level sampling to optical signals received, transmit level values sent to corresponding module monitoring circuits to be analyzed, and respectively instruct optical transmission control circuits to adjust an optical transmission processing circuit, so that the semiconductor laser of an optical fiber station can work at the best state, current can be driven by a smaller optical assembly to work without reducing the working property parameter, further, the loss of the semiconductor laser device can be reduced, the service life of an optical module can be prolonged, and the problem that due to the rise and reduction of the environment temperature, the aging of the device and the different lengths of installed cables, the optical communication is not smooth can be avoided.
Description
Technical field
The utility model relates to a kind of analog optical fiber repeater that adapts to practical applications.
Background technology
Radio wave has than lossy at spatial transmission; Stop simultaneously at the various barriers of communication process, influences such as reflection, scattering; Communicate by letter coverage hole or weak signal area must appear; Some special local problems such as along the line in user's density regions, highway especially, conference centre, tunnel, tourist district are more obvious, and these are local to occur easily that communication call completing rates are low, roaming is smooth, call drop even do not receive phenomenon such as signal.In the mobile communications network; For addressing the above problem; The necessary signal that strengthens this coverage; Except that increasing the base station, utilizing the repeater to enlarge the mobile communication covering also is a kind of comparatively economic, effective means, and wherein optical fiber repeater is a kind of a kind of form that enlarges base station range of extensive use.The optical fiber station is by forming near the light near-end machine of base station side and the light remote termination two parts that cover side, is applicable to that planning to build the repeater in the base station has high mountain to stop or far apart, possesses under the optical cable situation between while base station and the repeater and builds a station.Optical fiber repeater is through the Optical Fiber Transmission base station signal; Its basic principle is that the base station radio-frequency signal becomes light signal through the simulated light modulating transformation; Be transferred to the light remote termination through optical cable, remote termination converts light signal into the signal of telecommunication again, and being radiated by service antenna needs region covered; Same remote termination received RF signal becomes light signal through the simulated light modulating transformation, is transferred to the near-end machine through optical cable, and the near-end machine converts light signal into the signal of telecommunication again and passes to the base station, accomplishes the mobile communication signal coverage extension.Through optical cable transmission signals distance, space isolation is good, can not produce with disturbing frequently, do not receive the influence of geographical environment, Changes in weather or the adjustment of donor base station coverage.Therefore working stability, advantage such as coverage effect is good, can adopt omnidirectional antenna to cover from sending out an antenna, and system stability, far-end sky line options are flexible and easy for installation.
Analog optical fiber station equipment commonly used at present has following not enough situation in practical engineering application: 1; In practical applications; Different, the corresponding connection cable length of the distance of infield is also different between light remote termination and the light near-end machine; Optical transmission loss is different, is waste with bigger luminous power transmission.The luminous power output of the semiconductor laser in the optical fiber station simultaneously is big more, need corresponding increase semiconductor laser biasing drive current, and the semiconductor laser of big current work generates heat easily, loss is also bigger, and useful life is corresponding also short.2; The semiconductor laser component at optical fiber station in use; Because environmental factors such as the rising of temperature, reductions, all can greatly influence drive current variations and the light output characteristic of semiconductor laser component, can bring the luminous power instability of semiconductor laser output; Even the damage of accelerated semiconductor laser, thereby influence communication.3, use through certain time limit at the optical fiber station of widespread usage semiconductor laser at present, and during because of laser module burn-in effects normal communication, usual practice is to change laser module, does not make full use of resource.In fact improve the semiconductor laser component control circuit,, make it increase its optical output power, recover the normal communication requirement, avoid labour cost and trouble, use that can the extended fiber station through adjusting its bias current.
Summary of the invention
In view of above-mentioned conventional simulation optical fiber station does not take into full account technical deficiency factors such as analog optical fiber station environment for use and optical assembly wear out; The purpose of the utility model is to provide the analog optical fiber repeater of automatic adaptation engineering-environment; Through designing semiconductor light control circuit reasonably; According to the ambient temperature that occurs in the practical applications, optical cable length, factors vary such as aging; The running parameter of noise spectra of semiconductor lasers is made rational setting, satisfies under the engineering demand in the luminous power output of laser, and semiconductor laser is with lower biasing drive current work; Lower the semiconductor laser working loss and guarantee trouble free service, the useful life at extended fiber station and maintenance needs to greatest extent.
The utility model adopts following technical scheme to realize: a kind of analog optical fiber repeater that adapts to practical applications; Comprise light near-end machine and light remote termination; It is characterized in that: the descending output of first duplexer of said smooth near-end machine sends treatment circuit through the first downlink radio frequency processing unit, first light successively and is connected with the first wavelength division multiplexing unit, and described first sprinkles the branch Multiplexing Unit is connected with the first smooth light inlet outgoing interface; Described first sprinkles the branch Multiplexing Unit also is connected with the up input of said first duplexer through the first light-receiving treatment circuit, the first up RF processing unit successively; The described first downlink radio frequency processing unit is connected with first modular processing unit, and described first modular processing unit also is connected with the first up RF processing unit, the first smooth sending controling unit, the first light-receiving collecting unit and the first monitoring Transmit-Receive Unit; The said first light-receiving collecting unit connects the first light-receiving treatment circuit, and the first smooth sending controling unit connects first light and sends treatment circuit; The said first monitoring Transmit-Receive Unit connects first light and sends treatment circuit, the first light-receiving treatment circuit and first modular processing unit; The up output of second duplexer of said smooth remote termination is connected to the LNA processing unit; Send treatment circuit through the second up RF processing unit, second light successively then and be connected with the second wavelength division multiplexing unit, the described second wavelength division multiplexing unit is connected with the second smooth light inlet outgoing interface; The said second wavelength division multiplexing unit also is connected with the descending input of described second duplexer through the second smooth sending and receiving treatment circuit, the second downlink radio frequency processing unit, power amplifier unit successively; The described second downlink radio frequency processing unit is connected with second modular processing unit, and described second modular processing unit also is connected with the second up RF processing unit, the second smooth sending controling unit, the second light-receiving collecting unit and monitoring Transmit-Receive Unit; The said second light-receiving collecting unit connects the second light-receiving treatment circuit, and the said second smooth sending controling unit connects second light and sends treatment circuit; The said second monitoring Transmit-Receive Unit connects second light and sends treatment circuit, the second light-receiving collecting unit and second modular processing unit.
The utility model carries out appropriate design control to its semiconductor laser component circuit, according to the engineering-environment practical situations through optimal design light near-end machine, light remote termination circuit; Light near-end machine, light remote termination all device have the light-receiving Acquisition Circuit, respectively its light signal of receiving are carried out level sampling, and level value is given after the corresponding module supervisory circuit analyzes; Instruct its light sending controling circuit that light is sent the treatment circuit adjustment respectively, the semiconductor laser that makes the optical fiber station is not lowering under its service behaviour parameter to be operated in optimum state; With less optical assembly drive current work; Reduce the loss of semiconductor laser device, postpone optical module useful life, avoid rising and reduction, the device aging of ambient temperature; The installation optical cable is different in size, brings optical communication not smooth.Under the semiconductor laser component aging conditions, do not need extraneous the intervention simultaneously, modular processing unit can be provided with the semiconductor laser component drive current; Make it increase its optical output power; Recover the normal communication requirement, avoid manual maintenance expense and trouble, use that can the extended fiber station.
Description of drawings
Fig. 1 is a light near-end machine and a kind of block diagram that is connected of light remote termination of the present invention.
Fig. 2 is the theory diagram of smooth near-end machine of the present invention.
Fig. 3 is the theory diagram of smooth remote termination of the present invention.
Fig. 4 is that the light near-end machine circuit of one embodiment of the invention connects block diagram.
Fig. 5 is that the light remote termination circuit of one embodiment of the invention connects block diagram.
Fig. 6 is the optical power adjustment FB(flow block) of one embodiment of the invention.
Embodiment
Like Fig. 1, Fig. 2, shown in Figure 3, the present invention provides a kind of novel analog optical fiber direct discharging station, it is characterized in that: comprise the light near-end machine, the light remote termination unit that connect through public optical cable.Said smooth near-end machine comprises that duplexer 201, downlink radio frequency processing unit 202, light send treatment circuit 203, light sends control 204, light-receiving treatment circuit 208, light-receiving collecting unit 209, up RF processing unit 210, wavelength division multiplexing 206, modular processing unit 200 and monitoring Transmit-Receive Unit 205; The light remote termination comprises that duplexer 301, light-receiving treatment circuit 309, light-receiving collecting unit 308, downlink radio frequency processing unit 310, power amplifier 311, LNA 302, up RF processing unit 304, light send treatment circuit 305, light sends control 306, wavelength division multiplexing 307, modular processing unit 300 and monitoring Transmit-Receive Unit 303.
As shown in Figure 2, the following line output of the duplexer 201 of said smooth near-end machine is connected to downlink radio frequency processing unit 202, through behind the light transmission treatment circuit 203, gets into wavelength division multiplexing unit 206 again, and the back is exported by light light inlet outgoing interface; The light light inlet outgoing interface of said smooth near-end machine is input to wavelength division multiplexing unit 206, through behind the light-receiving treatment circuit 208, enters into up RF processing unit 210 again, after be linked into the up input of duplexer 201; Said modular processing unit 200 connects downlink radio frequency processing unit 202, up RF processing unit 210, light sending controling unit 204, light-receiving collecting unit 209 and monitoring Transmit-Receive Unit 205; Said light-receiving collecting unit 209 connects light-receiving treatment circuit 208, and light sending controling unit 204 connects light and sends treatment circuit 203; Said monitoring Transmit-Receive Unit 205 connects light and sends treatment circuit 203, light-receiving treatment circuit 208 and modular processing unit 200.
As shown in Figure 3, the last line output of the duplexer 301 of said smooth remote termination is connected to LNA Unit 302, through up RF processing unit 304, through behind the light transmission treatment circuit 305, gets into wavelength division multiplexing unit 307 again, and the back is exported by light light inlet outgoing interface; The light light inlet outgoing interface of said smooth remote termination is input to wavelength division multiplexing unit 307, through behind the light sending and receiving treatment circuit 309, enters into downlink radio frequency processing unit 310 again, enters into power amplifier unit 311 again, after be linked into the descending input of duplexer 301; Said modular processing unit 300 connects downlink radio frequency processing unit 310, up RF processing unit 304, light sending controling unit 306, light-receiving collecting unit 308 and monitoring Transmit-Receive Unit 303; Said light-receiving collecting unit 308 connects light-receiving treatment circuit 309, and light sending controling unit 306 connects light and sends treatment circuit 305; Said monitoring Transmit-Receive Unit connects light and sends treatment circuit 305, light-receiving collecting unit 309 and modular processing unit 300.
In order to let those skilled in the art better understand the utility model, the analog optical fiber repeater operation principle of the utility model is done further introduction below in conjunction with Fig. 4, Fig. 5 and Fig. 6:
Please refer to Fig. 4; The operation principle of light near-end machine gets into duplexer 401 from the downlink radio-frequency signal of base station through said smooth near-end machine BS port, and its output gets into descending numerical-control attenuator 402 and after the decay adjustment, exports; Its output gets into descending RF filter 403 and after filtering, exports; Its output signal gets into downlink drive amplifier 404 and amplifies, and closes the road with getting into mixer 405 from monitoring transmission circuit 423 signals, and its output signal is input to after semiconductor laser component 410 modulates; Its light output is connected to wavelength division multiplexer 411, is signaled by light gateway 412 output light; Up light receiving signal 412 inputs from the light gateway from the light remote termination are connected to wavelength division multiplexer 411, get into optical fiber receive module 413; Its radiofrequency signal that demodulates gets into up pre-amplifier 417 and amplifies; Its output signal enters into demultiplexer 418 along separate routes, and one the road isolates the monitoring receiving and transmitting signal handles to monitoring transmission circuit 423, and one the tunnel is that up radiofrequency signal is to up numerical-control attenuator 419; After getting into up RF filter 420 filtering, its output exports; Its output gets into up output amplifier 421 amplifies, and its output connects duplexer 401, is exported by the BS port at last.
Please refer to Fig. 5, the operation principle of light remote termination is transferred to the light gateway 501 of far-end optical transceiver through optical cable from the near-end light signal; After be connected to wavelength division multiplexer 502, after its light receiving signal got into and receives optical assembly 503, it demodulated radiofrequency signal and gets into descending pre-amplifier 506 and amplify; Its output radiofrequency signal entering signal splitter 507 is isolated pilot signal and radio frequency operation signal; Wherein pilot signal gets into monitoring transmitting-receiving 524, and radiofrequency signal gets into descending numerical-control attenuator 508, and numerical-control attenuator 508 output signals get into descending RF filter 509 Filtering Processing; Its output signal gets into downlink drive amplifier 510 and amplifies; After its output signal got into power amplifier 511 and amplifies, it outputed to duplexer 512, after be connected to the output of MS port; Up reception signal from remote termination is input to duplexer 512 by the MS port; Line output is amplified through LNA circuit 513 on it; Its output gets into up numerical-control attenuator 514 and handles, and after its output got into up RF filter 515, its output signal was input to line driver amplifier 516; Its output signal closes the road with importing mixer 517 from monitoring transmitting-receiving 524 signals; It closes the road signal to semiconductor laser component 522 modulation, and its output light signal is input to wavelength division multiplexer 502, after be connected to the light bright dipping and go into 501 interfaces.
With reference to figure 4, Fig. 5, Fig. 6 optical power signals control flow: is light emitting source with light near-end machine earlier, the light remote termination is that light-receiving is an example.Light near-end machine presets semiconductor laser 410 smooth initial gain value A through modular processing unit 422, after relatively amplifying 407, drives semiconductor laser component 410 output light initial power A values by light emitting power drive circuit 406; The light emitting power level is gathered 409 noise spectra of semiconductor lasers, 410 power outputs and is carried out the luminous power collection, and converts DC level into and be input to modular processing unit 422 and comparison amplifier 407 respectively, forms a kind of luminous power negative feedback; The luminous power of stabilization of semiconductor laser module 410 is initially exported the A value; Its light output is detected by 525 pairs of optical power signals B values that receive of receiving optical assembly of light-receiving Acquisition Circuit after wavelength division multiplexer 411, light gateway 412 and optical cable are transferred to light discrepancy 501, the wavelength division multiplexer 502 of light remote termination and receive optical assembly 503, and it detects level and is input to modular processing unit 523; Scope with the desired light received power value C in presetting is relatively judged; If, optical cable length or the like factor is installed causes that received optical power signal B value is greater than or less than the scope of the light receiving power value C that presets, establishes B-C=± Δ B because of the rising of ambient temperature and reduction, device aging; Desirable Δ B value is enough little; It is fixed specifically to be come by design accuracy, and when Δ B value was undesirable, then the modular processing unit 523 of light remote termination sent the luminous power that reduces or increases the near-end optical transceiver and instructs and receive and dispatch 524 to monitoring; Behind mixer 517; Get into far-end semiconductor laser component 522, be transferred to light gateway 412, the wavelength division multiplexer 411 of light near-end machine, get into optical fiber receive module 413 through wavelength division multiplexer 502, light gateway 501 and optical cable; Again behind up pre-amplifier 417, signal shunt 418; Give modular processing unit 422 through monitoring transmitting-receiving 423 demodulating informations again, after being handled by modular processing unit 422, its output order reduces or increases semiconductor laser optical output power A ± Δ A; At this moment require light near-end optical output power to reduce or increase Δ A; Modular processing unit 422 is revised and preset semiconductor laser component 410 initial values is A-Δ A or A+ Δ A, makes the power output A-Δ A or the A+ Δ A value of semiconductor laser component 410, like this in the scope of the light receiving power value C that adjusted smooth far-end received optical power signal B value is presetting; Be B-C=± Δ B is enough little, till meeting design requirement.Equally for being light emitting source with the light remote termination, light near-end machine be the luminous power control flow of light-receiving also with above-mentioned the same, no longer repeat here.Can adapt to the user demand of actual engineering-environment through a kind of so novel analog optical fiber repeater of design, manual maintenance expense and trouble are avoided in the loss at reduction optical fiber station, use that can the extended fiber station.
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (1)
1. an analog optical fiber repeater that adapts to practical applications comprises light near-end machine and light remote termination, it is characterized in that:
The descending output of first duplexer of said smooth near-end machine sends treatment circuit through the first downlink radio frequency processing unit, first light successively and is connected with the first wavelength division multiplexing unit, and described first sprinkles the branch Multiplexing Unit is connected with the first smooth light inlet outgoing interface; Described first sprinkles the branch Multiplexing Unit also is connected with the up input of said first duplexer through the first light-receiving treatment circuit, the first up RF processing unit successively; The described first downlink radio frequency processing unit is connected with first modular processing unit, and described first modular processing unit also is connected with the first up RF processing unit, the first smooth sending controling unit, the first light-receiving collecting unit and the first monitoring Transmit-Receive Unit; The said first light-receiving collecting unit connects the first light-receiving treatment circuit, and the first smooth sending controling unit connects first light and sends treatment circuit; The said first monitoring Transmit-Receive Unit connects first light and sends treatment circuit, the first light-receiving treatment circuit and first modular processing unit;
The up output of second duplexer of said smooth remote termination is connected to the LNA processing unit; Send treatment circuit through the second up RF processing unit, second light successively then and be connected with the second wavelength division multiplexing unit, the described second wavelength division multiplexing unit is connected with the second smooth light inlet outgoing interface; The said second wavelength division multiplexing unit also is connected with the descending input of described second duplexer through the second smooth sending and receiving treatment circuit, the second downlink radio frequency processing unit, power amplifier unit successively; The described second downlink radio frequency processing unit is connected with second modular processing unit, and described second modular processing unit also is connected with the second up RF processing unit, the second smooth sending controling unit, the second light-receiving collecting unit and monitoring Transmit-Receive Unit; The said second light-receiving collecting unit connects the second light-receiving treatment circuit, and the said second smooth sending controling unit connects second light and sends treatment circuit; The said second monitoring Transmit-Receive Unit connects second light and sends treatment circuit, the second light-receiving collecting unit and second modular processing unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203235570U CN202190272U (en) | 2011-08-31 | 2011-08-31 | Simulated optical fiber repeater applied in engineering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203235570U CN202190272U (en) | 2011-08-31 | 2011-08-31 | Simulated optical fiber repeater applied in engineering |
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| CN202190272U true CN202190272U (en) | 2012-04-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743583A (en) * | 2014-12-09 | 2016-07-06 | 北京华为数字技术有限公司 | Method for adjusting optical power, and optical module |
-
2011
- 2011-08-31 CN CN2011203235570U patent/CN202190272U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743583A (en) * | 2014-12-09 | 2016-07-06 | 北京华为数字技术有限公司 | Method for adjusting optical power, and optical module |
| CN105743583B (en) * | 2014-12-09 | 2019-05-17 | 北京华为数字技术有限公司 | A kind of method and optical module adjusting optical power |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 Termination date: 20140831 |
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| EXPY | Termination of patent right or utility model |