CN202818308U - Automatic insert-cut optical emitter - Google Patents
Automatic insert-cut optical emitter Download PDFInfo
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- CN202818308U CN202818308U CN 201220350445 CN201220350445U CN202818308U CN 202818308 U CN202818308 U CN 202818308U CN 201220350445 CN201220350445 CN 201220350445 CN 201220350445 U CN201220350445 U CN 201220350445U CN 202818308 U CN202818308 U CN 202818308U
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- light signal
- monitoring circuit
- program control
- power monitoring
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Abstract
The utility model relates to an automatic insert-cut optical emitter, comprising a wavelength division multiplexer and a first optical power monitoring circuit both connected with mainly-broadcasted optical signals, and an optical emitter connected with insert-cut RF signals, wherein the output end of the optical emitter is connected with the input end of a program control optical attenuation device, the output end of the program control optical attenuation device is connected with the wavelength division multiplexer and a second optical power monitoring circuit respectively, the first optical power monitoring circuit and the second optical power monitoring circuit are connected with an MCU controller, and the output end of the MCU controller is connected with the program control optical attenuation device. The automatic insert-cut optical emitter has the beneficial effects of automatically completing the adjustment of insert-cut optical signals, dispensing with manual adjustment, adjusting the insert-cut optical signals in real time with the dynamic change of the mainly-broadcasted optical signals, enabling the optical power difference value between the mainly-broadcasted signals and the insert-cut optical signals to be a fixed value delta; and enabling the insert-cut system to more stably operate.
Description
Technical field
The utility model belongs to the optical communication technique field, is specifically related to a kind of automatic insert playing light transmitter that is applied to the Optical Transport of CATV Signals network.
Background technology
Current cable television access network construction, " light entering and copper back " are large characteristics.The number of users of optical node band advances from 200 families, 500 families to 30 families, 50 families.As re-using the networking of 1310nm mode, cost is too high.And adopt the 1550nm mode, because the existence of EDFA is arranged, light signal can reach huge numbers of families with very low cost.Replace 1310nm secondary light link transmission technology with the 1550nm technology that direct transfers, carry out the cable television access network construction, become gradually networking trend.
In cable TV 1550nm one-level light transmission covering system, in order to realize VOD interactive VOD or local program co-cable transmission, need to realize intercutting of local signal at each sub-headend.
The scheme of intercutting of generally using at present as shown in Figure 1.Optical sender 1' converts to and intercuts light signal λ 2 intercutting the RF signal, and wavelength division multiplexer 3' is main broadcaster's light signal λ 1 and intercut light signal λ 2 and synthesize at same optical fiber by wavelength division multiplexing and transmit.Hand adjustment optical attenuator 2' is used for adjusting the luminous power P2 that intercuts light signal λ 2, so that P2 is than the little fixed value Δ of luminous power P1 of main broadcaster's light signal λ 1.This fixed value can not be too large, otherwise can affect the transmission of main broadcaster's light signal; Can not be too little, can't normal transmission otherwise can cause intercutting signal.General this fixed value Δ is got 6dB.
Yet, do like this and have following shortcoming:
1, debugging trouble.Will measure first the luminous power P1 of main broadcaster's light signal λ 1, transfer the luminous power P2 intercut light signal λ 2 while surveying again, so that P2 is than the little fixed value Δ of luminous power P1 of main broadcaster's light signal λ 1, and then the access wavelength division multiplexer closes ripple output.
2, can not dynamic following.The luminous power P1 of main broadcaster's light signal λ 1 of access wavelength division multiplexer, owing to factors such as temperature, humidity, optical transport network wear out, the luminous power P1 of the main broadcaster's light signal λ 1 after long-distance transmissions can change along with the variation of time.So the luminous power P1 of main broadcaster's light signal λ 1 and the difference DELTA of intercutting between the luminous power P2 of light signal λ 2 also can change, rather than a fixed value.The stability of intercutting application will be affected like this, the optical transmission signal communication failure can be caused when serious.
Along with the development of the network rebuilding " light entering and copper back ", the extensive use of cut system, above shortcoming will be more and more outstanding.
Summary of the invention
The purpose of this utility model has been to provide a kind of can finish the adjustment of intercutting the light signal size automatically, the variation of dynamic following main broadcaster light signal, and the automatic insert playing light transmitter of the ultralow exhaust gas temperature of light signal is intercutted in real time adjustment.
For reaching the goal of the invention the technical solution adopted in the utility model be:
A kind of automatic insert playing light transmitter, it is characterized in that: comprise the wavelength division multiplexer that is connected with main broadcaster's light signal be connected the optical power monitoring circuit, with the optical sender that intercuts the RF signal and be connected, the output of described optical sender links to each other with the input of program control optical attenuator, the output of described program control optical attenuator links to each other with wavelength division multiplexer, the second optical power monitoring circuit respectively, described the first optical power monitoring circuit, the second optical power monitoring circuit link to each other with the MCU controller, and the output of described MCU controller links to each other with described program control optical attenuator;
Described optical sender is used for converting to and intercutting light signal intercutting the RF signal;
Described the first optical power monitoring circuit is used for the luminous power of Real-Time Monitoring main broadcaster light signal, and Monitoring Data is sent to the MCU controller;
Described program control optical attenuator is used for adjusting in real time the luminous power of intercutting light signal according to the control signal of MCU controller;
Described the second optical power monitoring circuit is used for the luminous power of intercutting light signal of Real-Time Monitoring after program control optical attenuator adjustment, and Monitoring Data is sent to the MCU controller;
Described MCU controller is used for receiving the Monitoring Data of the first optical power monitoring circuit, the transmission of the second optical power monitoring circuit, and transmission is adjusted the control signal of the luminous power of intercutting light signal to program control optical attenuator according to Monitoring Data;
Described wavelength division multiplexer be used for main broadcaster's light signal with intercut light signal and synthesize at same optical fiber by wavelength division multiplexing and transmit.
Further, described program control optical attenuator is that electricity is transferred variable optical attenuator.
The luminous power of the utility model by dynamic monitoring main broadcaster light signal, intercut the luminous power of light signal, then control the attenuation of program control optical attenuator by the MCU controller, obtain the suitable luminous power of intercutting light signal, so that intercut the luminous power of light signal than the little fixed value Δ of luminous power of main broadcaster light signal.
The beneficial effects of the utility model are mainly manifested in: can automatically finish the adjustment of intercutting the light signal size, need not manual debugging; The variation of dynamic following main broadcaster light signal is adjusted in real time and is intercutted light signal, so that main broadcaster's light signal and intercut that the luminous power difference is a fixed value Δ between the light signal; So that the cut system operation is more stable.
Description of drawings
Fig. 1 is the existing circuit block diagram that intercuts scheme.
Fig. 2 is circuit block diagram of the present utility model.
Embodiment
Come the utility model is further specified below in conjunction with specific embodiment, but the utility model is not confined to these embodiments.One skilled in the art would recognize that the utility model contained all alternatives, improvement project and the equivalents that may comprise in claims scope.
With reference to Fig. 2, a kind of automatic insert playing light transmitter, comprise the wavelength division multiplexer 3 that is connected with main broadcaster's light signal λ 1 be connected optical power monitoring circuit 4, with the optical sender 1 that intercuts the RF signal and be connected, the output of described optical sender 1 links to each other with the input of program control optical attenuator 2, the output of described program control optical attenuator 2 links to each other with wavelength division multiplexer 3, the second optical power monitoring circuit 5 respectively, described the first optical power monitoring circuit 4, the second optical power monitoring circuit 5 link to each other with MCU controller 6, and the output of described MCU controller 6 links to each other with described program control optical attenuator 2;
Described optical sender 1 is used for converting to and intercutting light signal λ 2 intercutting the RF signal;
Described the first optical power monitoring circuit 4 is used for the luminous power of Real-Time Monitoring main broadcaster light signal λ 1, and Monitoring Data is sent to MCU controller 6;
Described program control optical attenuator 2 is used for adjusting in real time the luminous power of intercutting light signal λ 2 according to the control signal of MCU controller 6;
Described the second optical power monitoring circuit 5 is used for the luminous power of intercutting light signal λ 2 of Real-Time Monitoring after program control optical attenuator 2 is adjusted, and Monitoring Data is sent to MCU controller 6;
Described MCU controller 6 is used for receiving the Monitoring Data of the first optical power monitoring circuit 4,5 transmissions of the second optical power monitoring circuit, and transmission is adjusted the control signal of the luminous power of intercutting light signal λ 2 to program control optical attenuator 2 according to Monitoring Data;
Described wavelength division multiplexer 3 be used for main broadcaster's light signal λ 1 with intercut light signal λ 2 and synthesize at same optical fiber by wavelength division multiplexing and transmit.
Described program control optical attenuator 2 is that electricity is transferred variable optical attenuator.
The luminous power of the utility model by dynamic monitoring main broadcaster light signal λ 1, intercut the luminous power of light signal λ 2, then control the attenuation of program control optical attenuator 2 by MCU controller 6, obtain the suitable luminous power of intercutting light signal λ 2, so that intercut the luminous power of light signal λ 2 than the little fixed value Δ of luminous power of main broadcaster's light signal λ 1.
The first optical power monitoring circuit in the present embodiment, the second optical power monitoring circuit all adopt the BLPD-PSA1-75AR type optical-electrical converter of Xiamen Bei Lai company to realize opto-electronic conversion, and corresponding voltage signal is passed to the MCU controller; The MCU controller, the STC12C5 series monolithic of employing macrocrystalline science and technology.Program control optical attenuator adopts the EVOA-1-1550 type electricity of the fast science and technology of Wuhan light to transfer variable optical attenuator, and the optical attenuation precision can reach 0.1dB.
Claims (2)
1. automatic insert playing light transmitter, it is characterized in that: comprise the wavelength division multiplexer that is connected with main broadcaster's light signal be connected the optical power monitoring circuit, with the optical sender that intercuts the RF signal and be connected, the output of described optical sender links to each other with the input of program control optical attenuator, the output of described program control optical attenuator links to each other with wavelength division multiplexer, the second optical power monitoring circuit respectively, described the first optical power monitoring circuit, the second optical power monitoring circuit link to each other with the MCU controller, and the output of described MCU controller links to each other with described program control optical attenuator;
Described optical sender is used for converting to and intercutting light signal intercutting the RF signal;
Described the first optical power monitoring circuit is used for the luminous power of Real-Time Monitoring main broadcaster light signal, and Monitoring Data is sent to the MCU controller;
Described program control optical attenuator is used for adjusting in real time the luminous power of intercutting light signal according to the control signal of MCU controller;
Described the second optical power monitoring circuit is used for the luminous power of intercutting light signal of Real-Time Monitoring after program control optical attenuator adjustment, and Monitoring Data is sent to the MCU controller;
Described MCU controller is used for receiving the Monitoring Data of the first optical power monitoring circuit, the transmission of the second optical power monitoring circuit, and transmission is adjusted the control signal of the luminous power of intercutting light signal to program control optical attenuator according to Monitoring Data;
Described wavelength division multiplexer be used for main broadcaster's light signal with intercut light signal and synthesize at same optical fiber by wavelength division multiplexing and transmit.
2. a kind of automatic insert playing light transmitter according to claim 1 is characterized in that: described program control optical attenuator is that electricity is transferred variable optical attenuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350445 CN202818308U (en) | 2012-07-18 | 2012-07-18 | Automatic insert-cut optical emitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350445 CN202818308U (en) | 2012-07-18 | 2012-07-18 | Automatic insert-cut optical emitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818308U true CN202818308U (en) | 2013-03-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220350445 Expired - Lifetime CN202818308U (en) | 2012-07-18 | 2012-07-18 | Automatic insert-cut optical emitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202818308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518827A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | Adjusting method of optical power and network equipment |
-
2012
- 2012-07-18 CN CN 201220350445 patent/CN202818308U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518827A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | Adjusting method of optical power and network equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |
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| CX01 | Expiry of patent term |