CN207117632U - A kind of RFoG two-way light receivers - Google Patents
A kind of RFoG two-way light receivers Download PDFInfo
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- CN207117632U CN207117632U CN201720773254.6U CN201720773254U CN207117632U CN 207117632 U CN207117632 U CN 207117632U CN 201720773254 U CN201720773254 U CN 201720773254U CN 207117632 U CN207117632 U CN 207117632U
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Abstract
It the utility model is related to technical field of communication equipment, disclose a kind of RFoG two-way light receivers, it includes fixed support, fixed support upper end is provided with PCB and laser, laser is provided with thermistor, control module built in PCB, control module includes MCU and ATC circuits, fixed support lower end is provided with semiconductor refrigerating heat-producing machine, temperature information is simultaneously sent to ATC circuits by the temperature of thermistor detection laser, after ATC circuits receive temperature information, judged according to Current Temperatures and drive the temperature of semiconductor refrigerating heat-producing machine regulation laser, ATC circuit output voltages are to semiconductor refrigerating heat-producing machine.The utility model has by adjusting laser temperature, to change laser output wavelength, avoids the occurrence of the effect of OBI interference phenomenons.
Description
Technical field
It the utility model is related to technical field of communication equipment, more particularly to a kind of RFoG two-way light receivers.
Background technology
Under the overall situation of existing catv network " light entering and copper back ", realized using passive PON and be based on DOCSIS schemes
Bidirectional optical fiber to family (FTTH) and FTTB (FTTB) be present or even following unique development trend.It is existing to be based on
Traditional hfc plant of DOCSIS schemes when realizing transmitted in both directions, due to reversely distribution network in number of users increase it is existing
Noise collection effect problem, bilateral network is set to face great communication performance bottleneck.
The appearance of RFoG technologies, it is addressed this problem, the uplink and downlink of RFoG equipment use wavelength-division multiplex (WDM)
Common fine transmission is carried out, typical case is 1550NM descending, and 1610NM is up.RFoG two-way light receivers and the two-way light-receiving of tradition
The difference of machine is：Its return laser is operated in " burst " pattern rather than traditional " normally opened " pattern.Utilize DOCSIS
Time-division multiplex technology in agreement, any instant in same up channel is realized, only allow a RFoG opening of device, under making
The cm device of side is kept in communication with CMTS head ends, and this man-to-man mode effectively prevent the convergence of noise.But go out again simultaneously
Show the problem of new, use RFoG equipment and passive PON networking, and when network takes the WDM modes to transmit, due to anti-
To the temperature drift effect of laser wavelength, when laser temperature change, its output wavelength will also change therewith, the higher wavelength of temperature
Drift is bigger.So in practical application network, when some RFoG equipment in network because noise becomes the up laser of ambassador
Open so as to launch optical signal (such as 1610NM), if just there is RFoG corresponding to the normal up-delivering signal opening of cm device to set simultaneously
Standby up laser, and the two wavelength of optical signal, very close to (wavelength difference is less than 0.5NM), two optical signals close to wavelength are just
Optical beat interference phenomenon can be produced, and beat noise will reduce signal to noise ratio (SNR) value of upward signal, influence optical signal transmission matter
Amount, this optical beat interference phenomenon are known as OBI.The situation of alternatively possible generation OBI problems is in RFoG Transmission systems：
When DOCSIS up-links are multichannel upward signal, can then there are multiple up time-scales, each moment in same system
Each up time-scale can have a cm device uploading data, then mean that can all there be multiple RFoG equipment at each moment
Return laser be opened, the wavelength difference of these upstream wavelengths from each other can also produce OBI problems when being less than 0.5NM.Cause
The temperature change of this laser easily causes output wavelength to produce change, and temperature is higher, and wave length shift is bigger, so as to need one kind
The temperature of RFoG two-way light receiver energy stability contorting lasers, avoids causing output wavelength to become because of the temperature change of laser
Change so as to produce OBI interference phenomenon.
Utility model content
The utility model because of laser temperature change for causing interference with the shortcomings that phenomenon occurs in the prior art, there is provided
A kind of RFoG two-way light receivers.
In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals：
A kind of RFoG two-way light receivers, including fixed support, fixed support upper end are provided with PCB and laser, and PCB is print
The abbreviation of printed circuit board, laser are welded on PCB, and laser is provided with thermistor, control module built in PCB, controls mould
Block includes MCU and ATC circuits, and MCU is the abbreviation of single-chip microcomputer, and fixed support lower end is provided with semiconductor refrigerating heat-producing machine, temperature-sensitive electricity
Hinder the temperature of detection laser and temperature information is sent to ATC circuits, after ATC circuits receive temperature information, according to current
Temperature judges and drives semiconductor refrigerating heat-producing machine to adjust support bracket fastened temperature, so as to adjust the temperature of laser, MCU
For sending constant reference signal to control ATC circuit output voltages to semiconductor refrigerating heat-producing machine.By semiconductor refrigerating system
The temperature of hot device regulation laser, makes laser be chronically at temperature constant state, so as to lock the output wavelength of laser, avoids
The OBI interference phenomenons caused by wave length shift, maintain the stable use of RFoG two-way light receivers；Also, RFoG is double
Can be according to the needs of practical application network, by selecting 16 different preset wavelength flexible networkings, to ensure to photoreceiver
It is more than 0.5nm per two neighboring wavelength interval, avoids producing OBI interference phenomenons, so as to improve the optical signal transmission quality of network,
Breach the communication performance bottleneck in legacy network.
Preferably, PCB is provided with mainboard, control module built in mainboard；Laser is provided with pin, and laser is by drawing
Pin is welded on PCB, and laser is connected by pin with control module.
Preferably, fixed support includes upper fixed block and lower fixed block, lower fixed block is provided with upper fixed block, semiconductor
Refrigerating and heating device is arranged on lower fixed block, and lower fixed block both ends are provided with groove.
Preferably, upper fixed block is provided with screwed hole, PCB is provided with through hole, and screw connects after passing through through hole with screwed hole
Connect；Upper fixed block is upper fixed block made of copper, and lower fixed block is lower fixed block made of copper.Upper fixed block made of copper it is lower solid
Determine block good heat conduction effect, so as to lift the efficiency of regulation laser temperature, reduce the phenomenon that laser wavelength drift occurs.
Preferably, upper fixed block is provided with circular hole, laser is connected after passing through circular hole with PCB；Upper fixed block is silvery
Into upper fixed block, lower fixed block is lower fixed block made of silver.The upper fixed block of silvery and lower fixed block good heat conduction effect, from
And the efficiency of regulation laser temperature is lifted, reduce the phenomenon that laser wavelength drift occurs.
The utility model has significant technique effect as a result of above technical scheme：By semiconductor refrigerating system
The temperature of hot device regulation laser, makes laser be chronically at temperature constant state, so as to lock the output wavelength of laser, avoids
The OBI interference phenomenons caused by wave length shift, maintain the stable use of RFoG two-way light receivers；Also, RFoG is double
Can be according to the needs of practical application network, by selecting 16 different preset wavelength flexible networkings, to ensure to photoreceiver
It is more than 0.5nm per two neighboring wavelength interval, avoids producing OBI interference phenomenons, so as to improve the optical signal transmission quality of network,
Breach the communication performance bottleneck in legacy network.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is Fig. 1 configuration schematic diagram.
Fig. 3 is the structural representation of fixed support and semiconductor refrigerating heat-producing machine.
Fig. 4 is principle framework schematic diagram of the present utility model.
The toponym that each number designation is referred in the figures above is as follows：Wherein, 1-laser, 11-, 2-temperature-sensitive
Resistance, 3-PCB, 31-screw, 32-mainboard, 321-control module, 3211-ATC circuits, 3212-MCU, 33-through hole,
4-fixed support, 41-upper fixed block, 411-screwed hole, 412-circular hole, 42-lower fixed block, 421-groove, 5-are partly led
Body refrigerating and heating device.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of RFoG two-way light receivers, as Figure 1-4, including fixed support 4, the upper end of fixed support 4 are provided with PCB3
With laser 1, laser 1 is provided with thermistor 2, and PCB3 is provided with mainboard 32, control module 321, laser built in mainboard 32
Device 1 is provided with pin 11, and laser 1 is welded on PCB3 by pin 11, and laser 1 passes through pin 11 and control module 321
Connection.Control module 321 includes MCU3212 and ATC circuits 3211, and the lower end of fixed support 4 is provided with semiconductor refrigerating heat-producing machine 5,
Temperature information is simultaneously sent to ATC circuits 3211 by the temperature of the detection laser 1 of thermistor 2, and ATC circuits 3211 receive temperature
After information, judged according to Current Temperatures and drive the temperature of the regulation fixed support 4 of semiconductor refrigerating heat-producing machine 5, so as to adjust
The temperature of laser 1 is saved, MCU3212 is used to send constant reference signal to control the output voltage of ATC circuits 3211 to semiconductor
Refrigerating and heating device 5.Thermistor 2 is used for the temperature of detection laser 1 and temperature information is sent into ATC circuits 3211, ATC electricity
Road 3211 judges whether the temperature of laser 1 is in preset value, if the temperature of laser 1 is not located at preset value, MCU3212 hairs
Constant reference signal is sent, so as to the output voltage of ATC circuits 3211 driving semiconductor refrigerating heat-producing machine 5, partly to be led to ATC circuits 3211
Refrigeration or heating, when needing to heighten the temperature of laser 1, ATC circuits can occur according to the direction of voltage for body refrigerating and heating device 5
3211 output forward voltages, so as to which semiconductor refrigerating heat-producing machine 5 controls what semiconductor refrigerating heat-producing machine 5 contacted with fixed support 4
The side heats；When needing to turn down the temperature of laser 1, ATC circuits 3211 export backward voltage, so as to semiconductor system
The side that cold heat-producing machine 5 controls semiconductor refrigerating heat-producing machine 5 to be contacted with fixed support 4 is freezed；Due to the He of fixed support 4
Heat transfer can occur for laser 1, and semiconductor refrigerating heat-producing machine 5 is adjusted the temperature of laser 1 by fixed support 4, makes laser 1
Temperature is in temperature constant state all the time, maintains the wavelength of laser 1 not change.
Fixed support 4 includes upper fixed block 41 and lower fixed block 42, and lower fixed block 42 is provided with upper fixed block 41, semiconductor
Refrigerating and heating device 5 is arranged on lower fixed block 42, and the lower both ends of fixed block 42 are provided with groove 421.When needing to be mounted in fixed support 4
During miscellaneous part, groove 421 is used for the screw for accommodating connection.
Upper fixed block 41 is provided with screwed hole 411, and PCB3 is provided with through hole 33, screw 31 pass through after through hole 33 with screwed hole
411 connections；Upper fixed block 41 is upper fixed block 41 made of copper, and lower fixed block 42 is lower fixed block 42 made of copper.
Upper fixed block 41 is provided with circular hole 412, and laser 1 is connected after passing through circular hole 412 with PCB3.
Embodiment 2
With embodiment 1, except that upper fixed block 41 is made up for upper fixed block 41, lower fixed block 42 made of silver of silver
Lower fixed block 42.The heat-conducting effect of lower fixed block 42 of the upper fixed block 41 of silvery is very good, so as to lift the temperature of regulation laser 1
The efficiency of degree, reduce the phenomenon that the wave length shift of laser 1 occurs.
In a word, preferred embodiment of the present utility model is the foregoing is only, it is all according to present utility model application the scope of the claims institute
The equivalent changes and modifications of work, it should all belong to the covering scope of the utility model patent.
Claims (5)
- A kind of 1. RFoG two-way light receivers, it is characterised in that：Including fixed support (4), fixed support (4) upper end is provided with PCB (3) it is welded on laser (1), laser (1) on PCB (3), laser (1) is provided with thermistor (2), and PCB (3) is built-in Control module (321), control module (321) include MCU (3212) and ATC circuits (3211), and fixed support (4) lower end is provided with half Temperature information is simultaneously sent to ATC circuits by conductor refrigerating and heating device (5), the temperature of thermistor (2) detection laser (1) (3211) after, ATC circuits (3211) receive temperature information, judged according to Current Temperatures and drive semiconductor refrigerating to heat The temperature of device (5) regulation fixed support (4), so as to adjust the temperature of laser (1), MCU (3212) is used to send constant reference Signal is to control ATC circuits (3211) output voltage to semiconductor refrigerating heat-producing machine (5).
- A kind of 2. RFoG two-way light receivers according to claim 1, it is characterised in that：PCB (3) is provided with mainboard (32), control module (321) built in mainboard (32)；Laser (1) is provided with pin (11), and laser (1) passes through pin (11) It is welded on PCB (3), laser (1) is connected by pin (11) with control module (321).
- A kind of 3. RFoG two-way light receivers according to claim 1, it is characterised in that：Fixed support (4) includes upper solid Determine block (41) and lower fixed block (42), lower fixed block (42) is provided with upper fixed block (41), and semiconductor refrigerating heat-producing machine (5) is set On lower fixed block (42), lower fixed block (42) both ends are provided with groove (421).
- A kind of 4. RFoG two-way light receivers according to claim 3, it is characterised in that：Upper fixed block (41) is provided with spiral shell Pit (411), PCB (3) are provided with through hole (33), and screw (31) is connected with screwed hole (411) afterwards through through hole (33)；Upper fixation Block (41) is upper fixed block (41) made of copper, and lower fixed block (42) is lower fixed block (42) made of copper.
- A kind of 5. RFoG two-way light receivers according to claim 3, it is characterised in that：Upper fixed block (41) is provided with circle Hole (412), laser (1) are connected with PCB (3) afterwards through circular hole (412)；Upper fixed block (41) is upper fixed block made of silver (41), lower fixed block (42) is lower fixed block (42) made of silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720773254.6U CN207117632U (en) | 2017-06-29 | 2017-06-29 | A kind of RFoG two-way light receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720773254.6U CN207117632U (en) | 2017-06-29 | 2017-06-29 | A kind of RFoG two-way light receivers |
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| Publication Number | Publication Date |
|---|---|
| CN207117632U true CN207117632U (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720773254.6U Active CN207117632U (en) | 2017-06-29 | 2017-06-29 | A kind of RFoG two-way light receivers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038185A (en) * | 2018-10-08 | 2018-12-18 | 杭州万隆光电设备股份有限公司 | Band TEC integrated coaxial type single fiber double wave laser BOSA component |
-
2017
- 2017-06-29 CN CN201720773254.6U patent/CN207117632U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038185A (en) * | 2018-10-08 | 2018-12-18 | 杭州万隆光电设备股份有限公司 | Band TEC integrated coaxial type single fiber double wave laser BOSA component |
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