CN206004666U - A kind of multi-channel wide temperature reception device based on RoF - Google Patents
A kind of multi-channel wide temperature reception device based on RoF Download PDFInfo
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- CN206004666U CN206004666U CN201620791432.3U CN201620791432U CN206004666U CN 206004666 U CN206004666 U CN 206004666U CN 201620791432 U CN201620791432 U CN 201620791432U CN 206004666 U CN206004666 U CN 206004666U
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Abstract
The utility model discloses a kind of multi-channel wide temperature reception device based on RoF, including multi-channel detection demultiplexing module and radio frequency output module, multi-channel detection demultiplexing module is made up of an integrated Wave decomposing multiplexer on the same chip and multiple photodetectors, Wave decomposing multiplexer includes an input port and multiple output ports, the input port injection of the ROF optical signals photodetector after light carrier separation, radiofrequency signal are exported to radio frequency output module from the radio frequency interface of photodetector.The utility model reduces, using the structure Wave decomposing multiplexer of multi-channel detection Multiplexing module, photodetector are integrated in a chip, signal amplitude and phase place randomness noise problem that individual devices interconnection is introduced.And adopt temperature control modules monitor in real time multi-channel detection demultiplexing module, the operating temperature of control chip, stable simulation light-to-signal transfer characteristic, satisfaction wide temperature job requirement.
Description
Technical field
The utility model is related to light carrier radio communication technical field, and in particular to a kind of utilization wavelength-division multiplex technique is realized
Multi-channel wide temperature reception device based on RoF.
Background technology
Light carrier radio communication (RoF) technology is directly using light carrier transmitting radio frequency signal, expands wireless communication bandwidth, with
High-frequency microwave transmission technology is compared, and have the advantages that transmission range length, low, electromagnetism interference is lost, is therefore widely used in height
The fields such as fast broadband access, satellite communication, Aero-Space.Reception device is the core devices of RoF communication system, and which has light
Signal is converted to the function of rf signal.
It is applied to the digital receiver of Digital Optical Fibre Communication System at present, is unsatisfactory in RoF analogue communication protecting secondary guarantor's phase
Require.And traditional multichannel analog RoF communication system, it is to carry each road signal using many radio-frequency carriers, re-modulation is to single
The communication mode that light carrier is transmitted.This transmission means can introduce intermodulation distortion during light-to-current inversion, affect signal
Quality.
In multichannel analog RoF communication system, mainly using Multi-path electricity carrier wave carries out parallel transmission, is therefore receiving
Multi-channel rf filtering system is integrated with device.The transmission means and reception device and wavelength-division multiplex multichannel RoF system are not
Join, the latter needs to realize light carrier separation in area of light, and carries out multidiameter delay process.Spelled using multiple single channel RoF reception devices
The multi-channel radio frequency communication system for connecing, in addition to needing extra increase optical multiplexer, is also introduced into individual devices interconnection and leads
The radio frequency signal amplitude of cause and phase place randomness noise problem, can not meet the requirement of RoF system in terms of device volume and energy consumption.
Meanwhile, it is the application for meeting the special type ring mirror such as Aero-Space, radar, opportunity of combat, multichannel RoF reception device is allowed in wide temperature
Stable working condition is kept under degree environmental change, this needs carries out extra temperature control to the device.
The RoF channel transmission scheme based on wavelength-division multiplex technique is we have proposed for this, and the program is every road radio frequency letter
Number single light carrier is provided, intermodulation distortion is effectively prevent, improves radio frequency transmission quality.And it is directed to the reception device of the program
Cannot be directly using traditional RoF receiver, it is necessary to which the new reception proposed towards wavelength-division multiplex multichannel RoF transmission technology is filled
Put.
Wavelength-division multiplex technique is to converge the different wave length optical carrier for carrying bulk information in transmitting terminal, and one
A kind of communication mode being transmitted in root optical fiber, technology significant increase Optical Fiber Transmission capacity, it is widely used in current
Networks of Fiber Communications.And fiber optic communication mainly adopts digital communication mode, digital receiver is used in receiving terminal, which integrally has
The amplifier of Finite Amplitude enlarging function will destroy the amplitude corresponding relation of original radio frequency signal, be unsatisfactory for RoF system to protecting secondary guarantor
The requirement of phase behaviour.Therefore application of the wavelength-division multiplex technique in analog communication system must be directed to, proposes new reception device.
Utility model content
Technical problem to be solved in the utility model is：Existing using multiple single channel RoF reception devices splice many
, there is radio frequency signal amplitude and phase place random noise problem that individual devices interconnection causes, and device in channel radio frequency communication system
The requirement of RoF system cannot be met in terms of volume and energy consumption.A kind of multi-channel wide temperature reception device based on RoF is now provided, is adopted
With the multi-channel detection demultiplexing module for being integrated in a chip, multi-channel detection is controlled to demultiplex mould by temperature control modules
The temperature of block, solves the technology that radio-frequency carrier separation is introduced during traditional multi-channel analog RoF is received and mismatches and multiple single channel
Radio frequency signal amplitude and phase place randomness noise problem that the splicing of RoF reception device is introduced.
Of the present utility model it is achieved through the following technical solutions：
A kind of multi-channel wide temperature reception device based on RoF, exports mould including multi-channel detection demultiplexing module and radio frequency
Block, multi-channel detection demultiplexing module is by an integrated Wave decomposing multiplexer on the same chip and multiple photodetector groups
Become, Wave decomposing multiplexer includes an input port and multiple output ports, the RoF optical signals light electrical resistivity survey after light carrier separation
The input port injection of device is surveyed, radiofrequency signal is exported to radio frequency output module from the radio frequency interface of photodetector.
Traditional multichannel RoF communication system, mainly using Multi-path electricity carrier wave carries out parallel transmission, therefore in reception device
In be integrated with multi-channel rf filtering system.The transmission means and reception device are mismatched with wavelength-division multiplex multichannel RoF system, are needed
Light carrier separation to be realized in area of light, and carry out multidiameter delay process.The multichannel spliced using multiple single channel RoF reception devices
RF communication system, in addition to needing extra increased optical multiplexer, is also introduced into the radio frequency that individual devices interconnection causes
Signal amplitude and phase place randomness noise problem, it is impossible to meet the requirement of RoF system in terms of device volume and energy consumption.
Multi-channel detection Multiplexing module is adopted in the technical program, and multi-channel detection demultiplexing module is by being integrated in a core
Wave decomposing multiplexer on piece and multiple photodetectors composition, the part of wherein multi-channel detection demultiplexing module are integrated in one
On individual chip, chip is specifically as follows photon chip.As Wave decomposing multiplexer, photodetector being integrated in same chip
On, it is possible to decrease signal amplitude and phase place randomness noise problem that individual devices interconnection is introduced.
Further, in order to the utility model is preferably realized, the need of each road optical carrier independence photodetection are met
Ask, the quantity of the output port of the Wave decomposing multiplexer, the quantity of photodetector are identical with light carrier quantity, it is possible to decrease letter
Intermodulation distortion between number.The optics of the multichannel ROF optical signals photodetector after separating light carrier through Wave decomposing multiplexer
Port is injected.Wherein photodetector has linear photoconductor conversion, reduces the function of radio frequency signal amplitude and phase characteristic, realizes
Secondary guarantor's Phase Receiver is protected, radiofrequency signal is exported to radio frequency output module by the radio frequency interface of photodetector.
Further, in order to preferably realize the utility model, the radio frequency output module includes radio frequency interface and radio frequency
The corresponding RF cable of interface, the radiofrequency signal after photodetector light-to-current inversion is by radio frequency interface and radio frequency interface pair
The RF cable that answers is coupled out the multi-channel wide temperature reception device based on ROF.
Further, in order to preferably realize the utility model, the quantity of the radio frequency interface, the quantity of RF cable with
The quantity of radiofrequency signal is identical.
Further, in order to preferably realize the utility model, the reception device also includes to demultiplex multi-channel detection
The temperature control modules being controlled with module temperature, temperature control modules include to monitor multi-channel detection demultiplexing module temperature
Thermistor, semiconductor cooler, semiconductor cooler demultiplexed to multi-channel detection according to the change in resistance of thermistor
The temperature of module is adjusted.
In order to obtain wide temperature operating characteristic, temperature control modules carry out accurate temperature control to multi-channel detection Multiplexing module
System, eliminates radio frequency signal amplitude and phase place change that thermal perturbation causes.For realizing working multi-channel detection demultiplexing module
The accurate temperature control of state of temperature, the resistance of thermistor is along with the heat produced in the course of work of chip or environment temperature
The change of degree and change, the resistance of thermistor is increased or decreased.By the change in resistance of thermistor is detected, change semiconductor
Current direction in refrigerator, produces heating or refrigeration, so as to control the operating temperature of multi-channel detection demultiplexing module, obtains
Light-to-current inversion effect that must be stable.
Further, in order to preferably realize the utility model, the thermistor is arranged on the top of chip, semiconductor
Refrigerator is installed in the bottom of chip.
Further, in order to preferably realize the utility model, the photodetector is also associated with photodetection driving
Circuit, photodetection drive circuit photodetection drive circuit is by the first electric capacity C1 100nF, first resistor R1, the second electric capacity C2
50pF, second resistance R2 composition.Wherein, the effect of the first electric capacity be for eliminating bias voltage noise；First resistor is played point
Pressure effect so that the bias voltage for being applied to photodetector meets requirement on devices；Photoelectric current after light-to-current inversion passes through second
Resistance is converted to photovoltage output, and realizes impedance matching；The direct current that second electric capacity is used for eliminating in signal is separated, and realizes exchange
Coupling output.
Further, in order to preferably realize the utility model, the reception device also includes shell, and shell is provided with light
Fine input port, radio frequency delivery outlet, controlling switch, fixing pin, WDM optical signal are entered by optical fiber input port and receive dress
Put, through multidiameter delay opto-electronic conversion, the radiofrequency signal of extraction is independently exported from radio frequency delivery outlet respectively；Controlling switch is included for light
Electric explorer provides the energization pins of bias voltage and the temperature control for thermistor, semiconductor cooler offer operating voltage is drawn
Pin；Fixing pin is arranged on the both sides of shell.
The utility model compared with prior art, has the following advantages and advantages：
(1) the utility model is adopted the structure Wave decomposing multiplexer of multi-channel detection Multiplexing module, photodetector collection
In Cheng Yi chip, signal amplitude and phase place randomness noise problem that individual devices interconnection is introduced is reduced.
(2) the utility model adopts temperature control modules monitor in real time multi-channel detection demultiplexing module, control chip
Operating temperature, stable simulation light-to-signal transfer characteristic, meet the job requirement of wide temperature.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structural representation；
Multi-channel rf signal spectrum and Wave decomposing multiplexer that Fig. 2 is transmitted using wavelength-division multiplex technique for the utility model
Spectrum schematic diagram；
Fig. 3 is the structural representation of photodetection drive circuit；
Fig. 4 is the shell mechanism schematic diagram of multi-channel wide temperature reception device.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment 1：
As shown in figure 1, a kind of multi-channel wide temperature reception device based on ROF, including multi-channel detection demultiplexing module, temperature
Degree control module and radio frequency output module.
Multi-channel detection demultiplexing module is by an integrated Wave decomposing multiplexer on the same chip and multiple smooth electrical resistivity surveys
Device composition is surveyed, Wave decomposing multiplexer includes an input port and multiple output ports, the ROF optical signals after light carrier separation
The input port injection of photodetector, radiofrequency signal are exported to radio frequency output module from the radio frequency interface of photodetector.
The present embodiment is modulated at multi-channel rf signal on different light carriers respectively using wavelength-division multiplex technique, and passes through light
After fibre carries out long range, low-loss transmission, enter in multichannel RoF reception device and realize light-to-current inversion.Above-mentioned smooth wavelength-division is multiple
It is coupled in multi-channel detection demultiplexing module by optical fiber with signal (wavelength is λ 1, λ 2 ... λ N).
Optical wavelength division multiplexed signal is divided into the optical signal that multichannel only has single light carrier by Wave decomposing multiplexer first.Its medium wave
Decomposition multiplex device is using the Wave decomposing multiplexer of high-isolation, it is possible to decrease the crosstalk between transmission channel.
The quantity of the output port of Wave decomposing multiplexer, the quantity of photodetector are identical with light carrier quantity, in channel
Cardiac wave length should be aligned with optical carrier wavelength, and channel bandwidth is more than the twice of radiofrequency signal speed.RoF signal spectrum and wavelength-division are demultiplexed
As shown in Figure 2 with device spectrum.
By light carrier separate after multichannel RoF optical signals photodetector optical port injection.In bias voltage
Control under, the optical signal of injection is converted to electric signal by photodetector, and the RoF optical signal power of injection will be according to light electrical resistivity survey
Survey device operating characteristic to be adjusted, so that linear transformation relation is obtained, keep the amplitude in radiofrequency signal and phase place to greatest extent
Information, meets analogue communication to protecting the secondary requirement for protecting phase.Radiofrequency signal after light-to-current inversion is from the radio frequency interface of photodetector
Output.Due to having carried out independent light-to-current inversion to each road RoF optical signal, it is to avoid the string introduced in multicarrier demodulating process
Problem is disturbed, improves radio communication quality.
The photodetector output end of multichannel demultiplexing module in the present embodiment, multi-channel rf signal connect radio frequency respectively
Cable and radio frequency interface, the radiofrequency signal after light-to-current inversion is coupled out reception device.Wherein radio frequency interface, RF cable are for penetrating
The composition part of frequency output module.In order to ensure stablizing for each road signal amplitude and phase relation, RF cable length will keep
Unanimously.While for improving coupling efficiency, reducing insertion loss, radio frequency interface should choose respective type according to radiofrequency signal bandwidth
Filter with low insertion loss interface.
Temperature control modules in the present embodiment, mainly carry out temperature control to multi-channel detection demultiplexing module temperature,
Temperature control modules include thermistor and semiconductor cooler.The effect of thermistor is that monitoring photon integrated chip is worked
Residing environment temperature in journey.The factor of the environment temperature is affected mainly to have two：Heat and outside temperature that chip itself is produced
Degree disturbance.As the integrated Wave decomposing multiplexer of photon chip and photoelectric detector performance are respectively provided with temperature dependent properties, because
This thermistor will be close to chip top, and direct monitoring chip temperature changes.According to selected thermistor characteristic, temperature is disturbed
Move and will cause being raised and lowered for thermistor resistance.Due to needing the environment temperature for meeting military project level to require that therefore temperature-sensitive is electric
Resistance must keep linear change in resistance in wide middle benefit gas.
By monitoring thermistor performance change, semiconductor cooler control section will provide electric current forward or backwards, reach
To refrigeration and heating effect, Contrary compensation is carried out to chip environmental temperature.For lifting temperature control effect, semiconductor cooler one side will
Photon chip bottom is pasted on, another side is close on crust of the device, increases radiating effect.
In the present embodiment, photodetector is to complete light-to-current inversion function under photodetection drive circuit.The drive circuit
Photodetection drive circuit is made up of the first electric capacity C1 100nF, first resistor R1, the second electric capacity C2 50pF, second resistance R2,
Physical circuit is as shown in Figure 3.First electric capacity C1 is used for eliminating operating voltage noise；First resistor R1 plays partial pressure effect so that
The bias voltage for being applied to photodetector meets requirement on devices；Photoelectric current after light-to-current inversion is converted to by second resistance R2
Photovoltage, is exported by radio frequency delivery outlet, and second resistance R2 also acts as the effect of impedance matching；Second electric capacity C2 is used for eliminating signal
In direct current separate, realize AC coupled output.
The shell of reception device is provided with which in the present embodiment includes that optical fiber input port, radio frequency delivery outlet and control are drawn
Pin.WDM optical signal is entered in the reception device by optical fiber input port, carries out multidiameter delay opto-electronic conversion, is extracted
Radiofrequency signal independently export from radio frequency delivery outlet respectively.Controlling switch includes two parts：Energization pins and temperature control pin.Such as
Shown in Fig. 4, pin 1 and 2 is energization pins, is that photodetector provides bias voltage；Pin 3 and other pins then draw for temperature control
Pin, the thermistor for needed for temperature control and semiconductor cooler device provide operating voltage.For effectively fixing the reception device,
Two fixing pin are respectively provided before and after device so as to met certain vibration and required.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications that within spirit of the present utility model and principle, is made, equivalent are replaced
Change, improve, should be included within protection domain of the present utility model.
Claims (8)
1. a kind of multi-channel wide temperature reception device based on RoF, it is characterised in that：Including multi-channel detection demultiplexing module and penetrating
Frequency output module, multi-channel detection demultiplexing module is by an integrated Wave decomposing multiplexer on the same chip and multiple photoelectricity
Detector constitutes, and Wave decomposing multiplexer includes an input port and multiple output ports, the RoF optical signal after light carrier separation
Injected by the input port of photodetector, radiofrequency signal is exported to radio frequency output module from the radio frequency interface of photodetector.
2. a kind of multi-channel wide temperature reception device based on RoF according to claim 1, it is characterised in that：The wavelength-division
The quantity of the output port of demultiplexer, the quantity of photodetector are identical with light carrier quantity.
3. a kind of multi-channel wide temperature reception device based on RoF according to claim 1, it is characterised in that：The radio frequency
Output module includes radio frequency interface RF cable corresponding with radio frequency interface, the radio frequency letter after photodetector light-to-current inversion
Number the multi-channel wide temperature reception device based on ROF is coupled out by radio frequency interface RF cable corresponding with radio frequency interface.
4. a kind of multi-channel wide temperature reception device based on RoF according to claim 3, it is characterised in that：The radio frequency
The quantity of interface, the quantity of RF cable are identical with the quantity of radiofrequency signal.
5. a kind of multi-channel wide temperature reception device based on RoF according to Claims 1-4 any one claim, its
It is characterised by：The reception device also includes the temperature control modules is controlled by multi-channel detection demultiplexing module temperature,
Temperature control modules include thermistor, the semiconductor cooler for monitoring multi-channel detection demultiplexing module temperature, semiconductor system
Cooler is adjusted to the temperature of multi-channel detection demultiplexing module according to the change in resistance of thermistor.
6. a kind of multi-channel wide temperature reception device based on RoF according to claim 5, it is characterised in that：The temperature-sensitive
Resistance is arranged on the top of chip, and semiconductor cooler is installed in the bottom of chip.
7. a kind of multi-channel wide temperature reception device based on RoF according to claim 6, it is characterised in that：The photoelectricity
Detector is also associated with photodetection drive circuit, photodetection drive circuit by the first electric capacity C1 100nF, first resistor R1,
Second electric capacity C2 50pF, second resistance R2 composition.
8. a kind of multi-channel wide temperature reception device based on RoF according to claim 5, it is characterised in that：The reception
Device also includes shell, and shell is provided with optical fiber input port, radio frequency delivery outlet, controlling switch, fixing pin, and WDM optical is believed
Number multi-channel wide temperature reception device based on RoF is entered by optical fiber input port, through multidiameter delay opto-electronic conversion, the radio frequency of extraction
Signal is independently exported from radio frequency delivery outlet respectively；Controlling switch include for photodetector provide bias voltage energization pins and
The temperature control pin of operating voltage is provided for thermistor, semiconductor cooler；Fixing pin is arranged on the both sides of shell.
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| CN201620791432.3U CN206004666U (en) | 2016-07-26 | 2016-07-26 | A kind of multi-channel wide temperature reception device based on RoF |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109141628A (en) * | 2018-06-14 | 2019-01-04 | 上海卫星工程研究所 | A kind of spaceborne optical fiber focus planar detector device |
| CN110940846A (en) * | 2018-09-21 | 2020-03-31 | 亚德诺半导体无限责任公司 | Device and method for removing disturbances from a serial data stream, and measuring and/or protection device comprising such a signal removal device |
| CN113866908A (en) * | 2021-08-17 | 2021-12-31 | 中国电子科技集团公司第二十九研究所 | Multi-channel high-radio-frequency-isolation microwave photonic module packaging structure |
| CN113949457A (en) * | 2021-09-23 | 2022-01-18 | 中航光电科技股份有限公司 | Miniaturized multichannel high-isolation radio frequency optical transmission system |
| CN114070414A (en) * | 2021-11-09 | 2022-02-18 | 中国电子科技集团公司第二十九研究所 | Multichannel radio frequency light receiving arrangement |
| CN115437084A (en) * | 2022-10-25 | 2022-12-06 | 上海三菲半导体有限公司 | One-to-one and one-to-many radio frequency transceiver |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141628A (en) * | 2018-06-14 | 2019-01-04 | 上海卫星工程研究所 | A kind of spaceborne optical fiber focus planar detector device |
| CN110940846A (en) * | 2018-09-21 | 2020-03-31 | 亚德诺半导体无限责任公司 | Device and method for removing disturbances from a serial data stream, and measuring and/or protection device comprising such a signal removal device |
| US11474131B2 (en) | 2018-09-21 | 2022-10-18 | Analog Devices International Unlimited Company | Removing perturbation signal from a serial data stream, and to measurement and/or protection apparatus including same |
| CN113866908A (en) * | 2021-08-17 | 2021-12-31 | 中国电子科技集团公司第二十九研究所 | Multi-channel high-radio-frequency-isolation microwave photonic module packaging structure |
| CN113866908B (en) * | 2021-08-17 | 2022-11-22 | 中国电子科技集团公司第二十九研究所 | Multi-channel high-radio-frequency-isolation microwave photonic module packaging structure |
| CN113949457A (en) * | 2021-09-23 | 2022-01-18 | 中航光电科技股份有限公司 | Miniaturized multichannel high-isolation radio frequency optical transmission system |
| CN113949457B (en) * | 2021-09-23 | 2023-03-14 | 中航光电科技股份有限公司 | Miniaturized multichannel high-isolation radio frequency optical transmission system |
| CN114070414A (en) * | 2021-11-09 | 2022-02-18 | 中国电子科技集团公司第二十九研究所 | Multichannel radio frequency light receiving arrangement |
| CN115437084A (en) * | 2022-10-25 | 2022-12-06 | 上海三菲半导体有限公司 | One-to-one and one-to-many radio frequency transceiver |
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