CN103905123B - The adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system - Google Patents
The adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system Download PDFInfo
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- CN103905123B CN103905123B CN201410142571.9A CN201410142571A CN103905123B CN 103905123 B CN103905123 B CN 103905123B CN 201410142571 A CN201410142571 A CN 201410142571A CN 103905123 B CN103905123 B CN 103905123B
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Abstract
The present invention proposes the adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system.90% part of the laser through shunt OC1 branches that Distributed Feedback Laser is produced enters intensity modulator through Polarization Controller；10Gbit/s data enter modulator simultaneously after electrically amplified, and laser produces high-speed wide-band modulation light by intensity data modulation；The spectrum obtains many times of clock spectrum after amplifying through 90% part of shunt OC2 branches through erbium-doped optical fiber amplifier EDFA by optical filter XTM50 filtering；10% laser that OC1 is separated obtains trimmed book vibration source after optical attenuator with clock spectrum combining：The spectrum is amplified into nearly Dispersion Flattened Fiber group through KPS erbium-doped fiber amplifiers and transmits to form long-range trimmed book vibration source, then through Raman amplifiction, the remote local-oscillator source of electricity is obtained by photodetector beat frequency；Electric high-frequency local oscillation source in the alternative high rate optical millimeter wave up-link in remote local-oscillator source, the regulation of its frequency and amplitude can be realized by adjusting system device parameter.
Description
Art
The present invention relates to a kind of adjustable remote local-oscillator source of Frequency and Amplitude in optical millimeter wave system, microwave light can be applied to
The fields such as sub-, fiber optic communication, wireless intelligent acess.
Background technology
In recent years, the miscellaneous service such as big data, mobile traffic, broadband streaming media constantly increases severely, and High rate and large capacity is wireless
Communication requirement increasingly increases, by Fibre Optical Communication Technology and high frequency wireless access fusion get up the optical millimeter wave communication technology should need and
It is raw.At present, the optical millimeter wave communication technology has become the study hotspot for realizing ultra wide band access.Scientific worker is in wireless optical fiber
Important process, such as OOK forms optical millimeter wave signal 56GHz, 2.8Gbit/s, 20km [1 are made in Research on Communication Technology field
Bright, remaining to found the state, Cao Zizheng, Chen Lin produce the light carrier radio communication system of 56GHz millimeter waves based on phase-modulator frequency doubling technology
System, photoelectron laser, 2010,21 (4)：547-550], 58GHz light carries millimeter wave, 2.5Gbit/s ofdm signals, descending
Transmit 20km and 2.5Gbit/s OOK signals, up light and carry the up 20km of millimeter wave [2 Dong Ze, Cao Zizheng, Chen Lin, Yu Jian
Army, the experimental study of 60GHz full duplex OFDM-ROF systems, communicate journal, 2011,32 (2)：72-76].In recent years start to occur
To higher data transmission rate and compared with the analog simulation of long span optical millimeter wave, the mould of 40GHz, 5Gbit/s, 60km optical millimeter wave
Intend emulation [3Jianxin Ma, 5Gbit/s Full-Duplex Radio-Over-Fiber Link With Optical
Millimeter-Wave Generation by Quadrupling the Frequency of the Electrical RF
Carrier, J.Opt.Commun.Netw, 2011,3 (2)：127-133], 26-40GHz, 7.5Gb/s, 90km optical millimeter wave
Analog simulation [4Ignacio Gonz á the lez Insua, Dirk of analog simulation and 26-40GHz, 10Gb/s, 53km optical millimeter wave
Plettemeier, and Christian G.Simple Remote Heterodyne Radio-Over-Fiber
System for Gigabit Per Second Wireless Access, Journal Of Lightwave
Technology, 2010,28 (16)：2289-2295].
Generation, transmission and the reception technique of optical millimeter wave are the important technologies for realizing high performance wideband radio communication.However,
Generally all have to introduce an expensive electric high-frequency local oscillation source [1,2] in the up subsystem of optical millimeter wave, exploratory development electricity is high
Frequency local vibration source alternative solution turns into the practical key technology difficulty of the optical millimeter wave communication technology.In view of optical millimeter wave system is to device
Part performance parameter, Fiber-optic parameter etc. require harsh, and current optical millimeter wave is produced in experimental technique, mostly using data compared with low rate
Situation, such as 5Gbit/s and its following.However, China is vast in territory, populous, territorial environment is complicated, information communication requirement is fast
Surge length, and high-speed, Frequency Adjustable, long span optical millimeter wave communication requirement become increasingly urgent.As can be seen here, innovatively solve
The substitution problem in electric high-frequency local oscillation source, realize that high-speed Frequency Adjustable long span is the crucial institute of optical millimeter wave Research on Communication Technology
.
The content of the invention
Content of the patent
In the case of optical millimeter wave demand is increasingly urgent, studied for above-mentioned optical millimeter wave in the problem of, the present invention is proposed
The adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system, to substitute in high rate optical millimeter wave up-link
Electric high-frequency local oscillation source.
The technical solution adopted for the present invention to solve the technical problems is：
The present invention proposes the adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system, intends the technology used
Scheme：The laser that narrow linewidth Distributed Feedback Laser is produced is after shunt OC1 branches, wherein 90% laser is through optical polarization controller
Into intensity modulator, Agilent Error Detector 81250 exports 10Gbit/sNRZ pseudo random pulse sequence data-signals via broadband
Enter intensity modulator after electric amplifier amplification simultaneously, narrow-linewidth laser produces high-speed wide-band modulation by intensity data modulation
Light, the high-speed wide-band modulation light produced here can branch as descending optical millimeter wave signal part i.e. simultaneously produce light millimeter
Ripple and trimmed book vibration source, but only discuss generation trimmed book vibration source situation here；High-speed wide-band modulation light divides through shunt OC2
Road, wherein 10% part can form the optical millimeter wave for carrying data, is not specifically discussed, 90% part is through Er-doped fiber herein
Many times of clock spectrum of 40GHz are obtained by optical filter XTM50 filtering after amplifier EDFA amplifications；Shunt OC1 separate 10%
Laser spectrum by optical attenuator VOA adjust power after, with 40GHz clock spectrum through 1：Light is obtained after 99 combiner OC3 combinings
Local vibration source signal spectrum, wherein clock spectrum enter combiner by 99% port；Trimmed book vibration source spectrum is through KPS Erbium-doped fiber amplifiers
Device is amplified into nearly Dispersion Flattened Fiber group Fiber transmission 122.79km and forms long-range trimmed book vibration source, then is put through backward Raman
Big device amplification, the remote local-oscillator source signal of electricity, the alternative high rate optical millimeter of the signal are obtained through 70GHz photodetector beat frequencies
Electric high-frequency local oscillation source in ripple up-link；The signal is amplified into frequency mixer through broadband electric amplifier SHF806E and mixed
Frequently, by the electric spectrality energy of electric spectrometer measurement analysis after；Wherein light path link can connect spectroanalysis instrument to signal using optical patchcord
Spectrum property measure.The regulation of remote local-oscillator source frequency and amplitude can by adjust erbium-doped optical fiber amplifier EDFA,
Optical filter XTM50, optical attenuator VOA, KPS erbium-doped fiber amplifier, raman amplifier are realized.
The beneficial effects of the invention are as follows：
The present invention proposes the adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system；Using same
DFB LASER Light Sources produce high rate optical millimeter wave and remote local-oscillator source, can effectively suppress phase noise；The DFB laser tool of use
There are narrow linewidth, high side mode suppression ratio characteristic, can effective inhibition strength noise；The 10Gbit/s exported using Error Detector 81250 is high
Speed data goes the intensity modulated DFB narrow-linewidth lasers can to improve data rate by a broadband intensity modulator；Adjustment system
Device parameter, the Frequency and Amplitude that remote local-oscillator source can be achieved is adjustable；Using backward Raman amplifiction, signal transmission span is extended,
Improve systematic function；With two kinds of generation optical millimeter wave method phases using radio frequency and baseband signal difference phase modulation and intensity
Than the present invention can produce high rate optical millimeter wave and remote local-oscillator source simultaneously, and optical millimeter wave system medium-long range local vibration source is produced
It is scheme novelty, simple possible, practical.This patent method and apparatus can be used as exploratory development high bit rate optical millimeter wave system
Important references, can be applied to the fields such as Microwave photonics, fiber optic communication.
Brief description of the drawings
Fig. 1 is the adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system.In Fig. 1,1 is narrow linewidth DFB
Laser, 2 be 10：90 shunt OC1,3 be optical polarization controller PC, and 4 be 40G high-speed wideband intensity modulators MOD, and 5 be peace
Prompt human relations 43Gbit/s Error Detectors 81250,6 are broadband electric amplifier SHF803P, and 7 be 10：90 shunt OC2,8 be Er-doped fiber
Amplifier EDFA, 9 be optical filter XTM50, and 10 be optical attenuator VOA, and 11 be 1：99 combiner OC3,12 be KPS Er-doped fibers
Amplifier, 13 be nearly Dispersion Flattened Fiber group Fiber, and 14 be backward raman amplifier Raman, and 15 be 70GHz photodetectors
PD, 16 be broadband electric amplifier SHF806E, and 17 be frequency mixer 11970U, and 18 be electric spectrometer E4440A, and 19 be spectroanalysis instrument
AQ6319；The electric spectrality energy of electric spectrometer E4440A measurement signals；Spectroanalysis instrument AQ6319 is measured to the spectrum property of signal,
It can be directly accessed using optical patchcord.
Fig. 2 is high-speed wide-band modulation spectrum and trimmed book vibration source spectrum, and Fig. 2 (a) is 10Gbps high-speed wide-band modulation light
Spectrum, Fig. 2 (b) is KPS erbium-doped fiber amplifiers amplification (IP=0.4A) after 40GHz trimmed book vibration sources, Fig. 2 (c) is 20GHz trimmed books
Vibration source, Fig. 2 (d) is 30GHz trimmed book vibration sources, and Fig. 2 (e) is 50GHz trimmed book vibration sources.
Fig. 3 is the long-range trimmed book vibration sources of 40GHz after transmission, and Fig. 3 (a) is only KPS erbium-doped fiber amplifiers amplification (IP=
0.4A) the long-range trimmed book vibration source after situation transmission, Fig. 2 (b) is that have KPS erbium-doped fiber amplifiers to amplify (IP=0.4A) and
Long-range trimmed book vibration source after the transmission of 27dBm Raman amplifictions situation.
Fig. 4 is the electric local vibration source of the long-range trimmed book vibration source beat frequency formation of 40GHz, is to have KPS erbium-doped fiber amplifiers to amplify (IP
=0.35A).
Embodiment
The present invention is further described with implementation below in conjunction with the accompanying drawings.
Shown in Fig. 1, the laser that narrow linewidth Distributed Feedback Laser (1) is produced is through 10：After 90 shunt OC1 (2) branches, wherein
90% laser enters 40G high-speed wideband intensity modulator MOD (4) through optical polarization controller PC (3), and Agilent 43Gbit/s is missed
The 10Gbit/s high-speed NRZ pseudo random pulse sequences data-signals of code instrument 81250 (5) output are via broadband electric amplifier
Enter 40G high-speed wideband intensity modulator MOD (4) simultaneously after SHF803P (6) amplifications, narrow-linewidth laser is modulated by intensity data
Produce high-speed wide-band modulation light, the high-speed wide-band modulation light produced here can branch as descending optical millimeter wave signal portion
Point optical millimeter wave and trimmed book vibration source are produced simultaneously, but only discuss produce trimmed book vibration source situation here；Adjust in high-speed broadband
Light processed is through 10：90 shunt OC2 (7) branches, wherein 10% part can be gone to form the optical millimeter wave for carrying data, do not have herein
Body is discussed；Wherein 90% part is amplified into optical filter XTM50 (9) through erbium-doped optical fiber amplifier EDFA (8), after filtering
Obtain many times of clock spectrum of 40GHz；10% laser spectrum that shunt OC1 (2) is separated adjusts work(by optical attenuator VOA (10)
After rate, with 40GHz clock spectrum through 1：Trimmed book signal of vibrating spectrum, wherein clock light are obtained after 99 combiner OC3 (11) combinings
Spectrum enters combiner by 99% port；Trimmed book vibration source spectrum is amplified into advancing coloud nearside through KPS erbium-doped fiber amplifiers (12) and dissipates flat
Smooth optical fiber group Fiber (13) transmission 122.79km forms long-range trimmed book vibration source, then is put through backward raman amplifier Raman (14)
Greatly, the remote local-oscillator source signal of electricity, the alternative high rate optical millimeter of the signal are obtained through 70GHz photoelectric detector PDs (15) beat frequency
Electric high-frequency local oscillation source in ripple up-link；The signal is amplified into frequency mixer through broadband electric amplifier SHF806E (16)
11970U (17) is mixed, after by the electric spectrality energy of electric spectrometer E4440A (18) measurement analysis；Wherein, light path link can be adopted directly
The spectrum property of signal is measured with optical patchcord connection spectroanalysis instrument AQ6319 (19).
Fig. 2 is high-speed wide-band modulation spectrum and trimmed book vibration source, and Fig. 2 (a) is 10Gbps high-speed wide-band modulation spectrum, figure
2 (b) is KPS erbium-doped fiber amplifiers amplification (IP=0.4A) after 40GHz trimmed book vibration sources, Fig. 2 (c) is 20GHz trimmed book vibration sources,
Fig. 2 (d) is 30GHz trimmed book vibration sources, and Fig. 2 (e) is 50GHz trimmed book vibration sources.Visible in Fig. 2 (a), high-speed wide-band modulation spectrum is closed
In center, spectrum is symmetrical；Visible in Fig. 2 (b-e), trimmed book vibration source spectral line is more smooth, and the regulation of its frequency and amplitude can be by adjusting
Whole erbium-doped optical fiber amplifier EDFA, optical filter XTM50, optical attenuator VOA are realized.
Fig. 3 is the long-range trimmed book vibration sources of 40GHz after transmission, and Fig. 3 (a) is only KPS erbium-doped fiber amplifiers amplification (IP=
0.4A) the long-range trimmed book vibration source after situation transmission, Fig. 2 (b) is that have KPS erbium-doped fiber amplifiers to amplify (IP=0.4A) and
Long-range trimmed book vibration source after the transmission of 27dBm Raman amplifictions situation.Fig. 3 (a) is visible, only KPS erbium-doped fiber amplifiers amplification (IP=
Long-range trimmed book vibration source decay 0.4A) after situation transmission is larger, and signal performance declines.Fig. 3 (b) is visible, has KPS Er-doped fibers to put
Big device amplification (IP=0.4A) and 27dBm Raman amplifictions in the case of, can the preferably long-range trimmed book vibration source of forming properties.
Fig. 4 is the electric local vibration source of the long-range trimmed book vibration source beat frequency formation of 40GHz, is to have KPS erbium-doped fiber amplifiers to amplify (IP
=0.35A) and 27dBm Raman amplifictions situation.It can be seen that, the main spectral line single-frequency performance of the local vibration source of formation is good, side mode suppression ratio
Height, amplitude is higher.Can be by adjusting erbium-doped optical fiber amplifier EDFA, optical filter XTM50, optical attenuator VOA, KPS er-doped
Fiber amplifier, raman amplifier, effectively change electric remote local-oscillator source side mode suppression ratio, frequency and amplitude.
It can be seen that, this patent method can provide the adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system, with
Substitute the electric high-frequency local oscillation source in high rate optical millimeter wave up-link.
Claims (1)
1. the adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system, it is characterised in that：Narrow linewidth Distributed Feedback Laser
(1) laser produced is after 10: 90 shunt OC1 (2) branches, wherein 90% laser enters through optical polarization controller PC (3)
40G high-speed wideband intensity modulator MOD (4), the 10Gbit/s high-speeds of Agilent 43Gbit/s Error Detectors 81250 (5) output
NRZ pseudo random pulse sequences data-signal enters 40G high-speed widebands simultaneously after amplifying via broadband electric amplifier SHF 803P (6)
Intensity modulator MOD (4), narrow-linewidth laser produces high-speed wide-band modulation light by intensity data modulation；High-speed wide-band modulation
Light is filtered through 10: 90 shunt OC2 (7) branches wherein 90% part is amplified into light through erbium-doped optical fiber amplifier EDFA (8)
Ripple device XTM50 (9), obtains many times of clock spectrum of 40GHz after filtering；10% laser spectrum that shunt OC1 (2) is separated is by light
After attenuator VOA (10) regulation power, trimmed book vibration source is obtained after 1: 99 combiner OC3 (11) combining with 40GHz clocks spectrum
Signal spectrum, wherein clock spectrum enter combiner by 99% port；Trimmed book vibration source spectrum is through KPS erbium-doped fiber amplifiers (12)
It is amplified into nearly Dispersion Flattened Fiber group Fiber (13) transmission 122.79km and forms long-range trimmed book vibration source, then through backward Raman
Amplifier Raman (14) amplifies, and the remote local-oscillator source signal of electricity is obtained through 70GHz photoelectric detector PDs (15) beat frequency, the electricity
Electric high-frequency local oscillation source in the alternative high rate optical millimeter wave up-link of remote local-oscillator source signal；The electric remote local-oscillator source letter
Number being amplified into frequency mixer 11970U (17) through broadband electric amplifier SHF806E (16) is mixed, after by electric spectrometer
The electric spectrality energy of E4440A (18) measurement analyses；Wherein it is possible to by adjust erbium-doped optical fiber amplifier EDFA, optical filter XTM50,
Optical attenuator VOA, KPS erbium-doped fiber amplifier, raman amplifier, effectively change side mode suppression ratio, the frequency in remote local-oscillator source
And amplitude.
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| WO2017008282A1 (en) * | 2015-07-15 | 2017-01-19 | 华为技术有限公司 | Cs local sequence generation method and device, transmitter and receiver |
| CN111694008A (en) * | 2020-06-08 | 2020-09-22 | 中国科学院光电技术研究所 | Method for eliminating laser mode hopping influence in frequency sweep coherent ranging |
| CN112217572B (en) * | 2020-10-13 | 2023-09-12 | 聊城大学 | Multi-carrier generating system based on two-stage modulation |
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| CN101267255A (en) * | 2008-02-20 | 2008-09-17 | 上海大学 | System and method for dual-channel optical phase modulation mm wave generation and remote vibration provision in mm wave optical transmission system |
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