CN202679529U - Digital video optical transceiver - Google Patents
Digital video optical transceiver Download PDFInfo
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- CN202679529U CN202679529U CN 201220268862 CN201220268862U CN202679529U CN 202679529 U CN202679529 U CN 202679529U CN 201220268862 CN201220268862 CN 201220268862 CN 201220268862 U CN201220268862 U CN 201220268862U CN 202679529 U CN202679529 U CN 202679529U
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Abstract
The utility model relates to digital video optical transceivers, comprising a digital video optical transceiver at a transmitting terminal and a digital video optical transceiver at a receiving terminal. The digital video optical transceiver at a transmitting terminal comprises a simulation signal input interface, an AD conversion unit, a modulation unit and a laser emitter. The digital video optical transceiver at a receiving terminal comprises a laser receiving unit, a demodulation unit, a DA conversion unit and a simulation signal output interface. According to the utility model, the structures of the digital video optical transceivers are simple, cost is low, and popularization is easy.
Description
Technical field
The utility model relates to fiber optic communication field, particularly a kind of digital video fiber optic transmitter.
Background technology
Optical transceiver is for the terminal equipment of realizing optical signal transmission.Optical transceiver mainly is responsible for electricity/light and light/electricity conversion and light emission and light-receiving.Optical transceiver is as the terminal equipment of transmitting optical signal, and general paired use is divided into optical receiver and optical transmitter.Optical transmitter is used for that the signal of telecommunication is transformed into light signal and realizes electricity/light conversion, and the light signal input optical fibre is transmitted.Optical receiver is used for that the light signal of accepting from optical fiber is reduced into the signal of telecommunication and realizes light/electricity conversion.
Video optical multiplexer is the terminal equipment of realizing that one to multiple road analog video signal transmits in optical fiber, and video optical multiplexer also can be divided into transmitting terminal and receiving terminal.Traditional video optical multiplexer mostly is the simulated light terminal, and described simulated light terminal has adopted PFM modulation technique real-time Transmission picture signal.Transmitting terminal carries out the electrical-optical conversion after analog video signal is carried out first the PFM modulation again, after light signal passes to receiving terminal, carries out light-electricity conversion, then carries out the PFM demodulation, recovers vision signal.The analog video optical transceiver has advantages of the transmitted in both directions that can realize at an optical fiber image and data-signal, but its defective is also fairly obvious, comprising: a) produce difficulty of debugging; B) simple optical fiber is realized comparatively difficulty of multiway images transmission, generally can only accomplish transmission 4 road images on the simple optical fiber; C) poor anti jamming capability is subjected to such environmental effects larger, has temperature to float phenomenon and occurs; D) the analog-modulated demodulation techniques stability that adopts is not high enough, and along with the increase of service time or the variation of environmental characteristics, its performance can change, and uses band to serve inconvenience to engineering.
All have obvious advantage because digital technology is compared with traditional analogue technique aspect a lot, so the digitlization of video optical multiplexer has been a kind of inevitable trend.Compare with the analog video optical transceiver, digital video fiber optic transmitter has the following advantages: 1) transmission range is longer, can reach 80Km, even farther; 2) support the video lossless regenerative repeating, therefore can adopt multistage transmission mode; 3) be subjected to environmental interference less, transmission quality is high; 4) signal volume of supporting can reach 16 the tunnel, even more (such as 32 the tunnel, the 64 tunnel).Though there has been digital video fiber optic transmitter in the prior art, existing digital video fiber optic transmitter structure is comparatively complicated, and cost is high.
The utility model content
The purpose of this utility model is to overcome existing digital video fiber optic transmitter complex structure, defective that cost is high, thereby provides a kind of structure relatively simple, lower-cost digital video fiber optic transmitter.
To achieve these goals, the utility model provides a kind of digital video fiber optic transmitter, comprises the digital video fiber optic transmitter of transmitting terminal and the digital video fiber optic transmitter of receiving terminal; Wherein,
The digital video fiber optic transmitter of transmitting terminal comprises analog input interface, AD conversion unit, modulating unit, generating laser; Described analog input interface is connected with the vision cable of outside, is used for from outside reception analog video signal; The analog video signal that receives is transferred to described AD conversion unit, by this unit vision signal is converted to digital form from analog form; The digital video signal that generates is modulated to described generating laser by described modulating unit, will be included the Laser emission of video information by described generating laser in coupled optical fiber, by the Optical Fiber Transmission vision signal;
The digital video fiber optic transmitter of receiving terminal comprises laser pick-off unit, demodulating unit, D/A conversion unit and analog signal output interface; Described laser pick-off unit receives laser from coupled optical fiber, from laser, demodulate digital video signal by described demodulating unit, then in described D/A conversion unit, convert digital video signal to analog video signal, by described analog signal output interface analog video signal is exported at last.
In the technique scheme, described analog input interface and described analog signal output interface adopt the RS485 data-interface to realize.
In the technique scheme, described modulating unit is fiber optic modulator.
The utility model has the advantage of:
Digital video fiber optic transmitter structure of the present utility model is relatively simple, cost is lower, is easy to promote and use.
Description of drawings
Fig. 1 is the structure chart of the digital video fiber optic transmitter of transmitting terminal of the present utility model;
Fig. 2 is the structure chart of the digital video fiber optic transmitter of receiving terminal of the present utility model.
Embodiment
Now the utility model will be further described by reference to the accompanying drawings.
The related digital video fiber optic transmitter of the utility model comprises the digital video fiber optic transmitter of transmitting terminal and receiving terminal, respectively they is illustrated below in conjunction with accompanying drawing.
With reference to figure 1, the digital video fiber optic transmitter of transmitting terminal comprises analog input interface, AD conversion unit, modulating unit, generating laser; Wherein, described analog input interface is connected with the vision cable of outside, is used for from outside reception analog video signal; The analog video signal that receives is transferred to AD conversion unit, by this unit vision signal is converted to digital form from analog form; The digital video signal that generates is modulated to generating laser by modulating unit, will be included the Laser emission of video information by generating laser in coupled optical fiber, by the Optical Fiber Transmission vision signal.
Described analog input interface can adopt the several data interface that can be connected with vision cable the row data communication of going forward side by side in the prior art, in the present embodiment preferred RS485 data-interface.
Described AD conversion unit adopts analog to digital converter ripe on the market, the ADS5292 that produces such as Texas Instrument etc.
Described modulating unit adopts fiber optic modulator, and this fiber optic modulator can adopt that Shanghai is sharp passs the RS-485 fibre optic modem that photoelectricity technology corporation, Ltd. produces.
The fiber laser that described generating laser can adopt Shenzhen Li Ou Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017 to produce.
The laser that includes vision signal that the digital video fiber optic transmitter of transmitting terminal sends is through the digital video fiber optic transmitter of Optical Fiber Transmission to receiving terminal, as shown in Figure 2, the digital video fiber optic transmitter of receiving terminal comprises laser pick-off unit, demodulating unit, D/A conversion unit and analog signal output interface; Wherein, described laser pick-off unit receives laser from coupled optical fiber, from laser, demodulate digital video signal by described demodulating unit, then in D/A conversion unit, convert digital video signal to analog video signal, by analog signal output interface analog video signal is exported at last.
The laser pickoff that described laser pick-off unit can adopt Yangzhou Linkage photoelectricity Co., Ltd to produce is realized.
Described demodulating unit can adopt that Shanghai is sharp passs the RS-485 fibre optic modem that photoelectricity technology corporation, Ltd. produces.
Described D/A conversion unit adopts analog to digital converter ripe on the market, the DAC3152 that produces such as Texas Instrument etc.
Described analog signal output interface can adopt the several data interface that can be connected with vision cable the row data communication of going forward side by side in the prior art, in the present embodiment preferred RS485 data-interface.
It should be noted last that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described.Although with reference to embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. a digital video fiber optic transmitter is characterized in that, comprises the digital video fiber optic transmitter of transmitting terminal and the digital video fiber optic transmitter of receiving terminal; Wherein,
The digital video fiber optic transmitter of transmitting terminal comprises analog input interface, AD conversion unit, modulating unit, generating laser; Described analog input interface is connected with the vision cable of outside, is used for from outside reception analog video signal; The analog video signal that receives is transferred to described AD conversion unit, by this unit vision signal is converted to digital form from analog form; The digital video signal that generates is modulated to described generating laser by described modulating unit, will be included the Laser emission of video information by described generating laser in coupled optical fiber, by the Optical Fiber Transmission vision signal;
The digital video fiber optic transmitter of receiving terminal comprises laser pick-off unit, demodulating unit, D/A conversion unit and analog signal output interface; Described laser pick-off unit receives laser from coupled optical fiber, from laser, demodulate digital video signal by described demodulating unit, then in described D/A conversion unit, convert digital video signal to analog video signal, by described analog signal output interface analog video signal is exported at last.
2. digital video fiber optic transmitter according to claim 1 is characterized in that, described analog input interface and described analog signal output interface adopt the RS485 data-interface to realize.
3. digital video fiber optic transmitter according to claim 1 is characterized in that, described modulating unit is fiber optic modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268862 CN202679529U (en) | 2012-06-08 | 2012-06-08 | Digital video optical transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268862 CN202679529U (en) | 2012-06-08 | 2012-06-08 | Digital video optical transceiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679529U true CN202679529U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220268862 Expired - Fee Related CN202679529U (en) | 2012-06-08 | 2012-06-08 | Digital video optical transceiver |
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| CN (1) | CN202679529U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767569B (en) * | 2015-03-31 | 2017-05-17 | 中国电子科技集团公司第三十四研究所 | Blue-green laser transmission system in optical communication |
| CN107124599A (en) * | 2017-06-03 | 2017-09-01 | 合肥市闵葵电力工程有限公司 | A kind of digital video fiber optic transmitter and digital video fiber optic transmitter detection method |
-
2012
- 2012-06-08 CN CN 201220268862 patent/CN202679529U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767569B (en) * | 2015-03-31 | 2017-05-17 | 中国电子科技集团公司第三十四研究所 | Blue-green laser transmission system in optical communication |
| CN107124599A (en) * | 2017-06-03 | 2017-09-01 | 合肥市闵葵电力工程有限公司 | A kind of digital video fiber optic transmitter and digital video fiber optic transmitter detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20130608 |