CN106100748A - Phase-modulator and adjustable chromatic dispersion device is utilized to generate the device and method of microwave waveform - Google Patents
Phase-modulator and adjustable chromatic dispersion device is utilized to generate the device and method of microwave waveform Download PDFInfo
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- CN106100748A CN106100748A CN201610392386.4A CN201610392386A CN106100748A CN 106100748 A CN106100748 A CN 106100748A CN 201610392386 A CN201610392386 A CN 201610392386A CN 106100748 A CN106100748 A CN 106100748A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5561—Digital phase modulation
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a kind of device and method utilizing phase-modulator and adjustable chromatic dispersion device to produce microwave waveshape signal, this invention relates to microwave technical field and technical field of photo communication, is mainly used in the generation of triangular wave and square-wave signal.Described method as shown in drawings, including light source, radio frequency source, circulator, Sagnac ring, Polarization Controller, the polarizer, adjustable chromatic dispersion device and photodetector.Described Sagnac ring is made up of polarization beam apparatus, phase-modulator.Phase-modulator is placed in Sagnac ring by the program, in conjunction with Polarization Controller and the polarizer, the light carrier of output signal is carried out amplitude and phase controlling, use adjustable chromatic dispersion device to realize the suppression to second harmonic simultaneously, adjust first-harmonic and the amplitude of triple-frequency harmonics and phase relation by regulation modulation index again, thus after photodetector, obtain triangular wave and square-wave signal.This microwave signal optics generation scheme has simple in construction, tuning is flexible, carry the features such as roomy.
Description
Technical field
The present invention relates to technical field of photo communication and microwave technical field, relate generally to optical communication technique is adjusted based on phase place
The method that device processed and adjustable chromatic dispersion device produce microwave signal.
Background technology
The special waveform signals such as sine wave, triangular wave, square wave, sawtooth waveforms, are widely used at fiber optic communication, optical signal
In reason, pulse radar, image display isoelectronic series system.Contemporary electronic systems towards high band, big bandwidth direction development, to more than
The rate requirement of waveshape signal is more and more higher.Tradition signal based on electronics produces technology, and digital-to-analogue conversion (DAC) exists electronics
Bottleneck, timing jitter is relatively big, and electromagnetic interference is serious, limits the application of high band electronic system.Optical microwave waveform generates skill
Art due to have big bandwidth, light, electromagnetism interference and can the advantage compatible with other optoelectronic systems and receive much concern.
Current microwave waveform optics produces scheme and can be largely classified into following a few class: (1) constructs based on phase-locked longitudinal mode
Random waveform produces technology, required by multiple longitudinal modes of mode-locked laser carry out independent intensity and phase-modulation synthesis
Waveform；(2) random waveform structural scheme based on Fiber Bragg Grating FBG array, uses FBG array to enter ultrashort pulse signal
Row multi-channel sampling, by controlling the required waveform of structure to each road signal in the weighting of time delays and reflex strength；(3) based on frequency
The random waveform generation technique of territory then domain mapping, after wide spectrum light source is carried out spectrum architecture, two introduced by dispersive medium
Rank dispersion measure realizes frequency-time domain and maps, and obtains the electrical domain signal identical with spectral；(4) at harmonic wave based on external modulation
Reason technology, will utilize sinusoidal microwave signal to produce high-order harmonic wave, meet the Fourier spectrum component of target waveform.
Harmonic treatment technology based on external modulation due to simple in construction, flexibly, be the most of greatest concern, most have potential should
By one of multi-functional waveshape signal generation technology being worth.But the harmonic treatment technology being currently based on external modulation faces waveform list
Many difficult problems such as one, frequency tunability is poor, system is unstable.
Summary of the invention
In order to solve the technical problem in the presence of background technology, the present invention proposes one and utilizes phase-modulator and can
Tunable dispersion device produces triangular pulse and the method for square wave.
The technical solution adopted for the present invention to solve the technical problems is: described device includes light source, radio-frequency signal source, Sa
Lattice Neck (Sagnac) ring, the polarizer, adjustable dispersion device, photodetector；The output port of light source and Polarization Controller 1 phase
Even, this Polarization Controller other end accesses Sagnac ring by circulator；The outfan of radio-frequency signal source and phase in Sagnac ring
The prevention at radio-frequency port of position manipulator is connected；Circulator outfan connects Polarization Controller 2 and the polarizer successively, the output input of the polarizer
In adjustable chromatic dispersion device；The outfan of adjustable chromatic dispersion device connects photodetector.The outfan of photodetector can connect
Electricity audiofrequency spectrometer and oscillograph are tested.
Described Sagnac ring is made up of polarization beam apparatus and phase-modulator, and two outfans of polarization beam apparatus connect respectively
The input and output side of phase-modulator.
The present invention operationally comprises the following steps:
(1) send, from laser instrument, the light wave that wavelength is λ to be injected into Polarization Controller；
(2) regulation Polarization Controller, is adjusted to the X with polarization beam apparatus by incident optical signal, and Y-axis angle is respectively the line of π/4
Polarized light.Polarization state is separated by the incident illumination entering Sagnac ring by polarization beam apparatus, forms the light letter that two-way power is equal
Number, a curb is transferred to phase-modulator clockwise, the counterclockwise transmission of another curb；
(3) by RF local oscillator signal input phase manipulator that frequency is f.The optical signal transmitted the most clockwise
Phase-modulation will be obtained, and due to the inherent character of manipulator, the faintest along the optical signal modulation of counterclockwise transmission, can
To ignore；
(4) optical signal from the output of Sagnac ring has two orthogonal polarization states, and after the polarizer, the two polarization state is closed
And be the line polarized light in a direction, by the Polarization Controller before the regulation polarizer, so that the light of output signal carries
The intensity of wave component and phase place obtain the adjustment in arbitrary extent；
(5) enter adjustable chromatic dispersion device from polarizer signal out, regulate dispersion values, each rank sideband of input signal is produced
Different phase shifts, square being directly proportional of phase shift size and each sideband frequency and optical carrier frequency difference.
(6) the modulated signal entrance photodetector beat frequency after dispersion processes obtains the signal of telecommunication.By selecting suitable color
Dissipate value, secondary electricity harmonic wave is suppressed.Regulation radio-frequency signal source amplitude changes the modulation index of phase-modulator simultaneously, permissible
The ratio of the amplitude realizing single order sideband and three rank sidebands is 9, and opposite in phase, thus obtains triangular signal.Can also regulate
The ratio of the amplitude that the modulation index of radio-frequency signal source amplitude change phase-modulator realizes single order sideband and three rank sidebands is 3, and
Phase place is identical, thus obtains square-wave signal.
The present invention proposes the optical generation method of a kind of microwave waveform, and the program utilizes Sagnac ring, in conjunction with polarization point
Bundle device and phase-modulator, be controlled output signal light carrier, uses adjustable chromatic dispersion device to realize humorous to second order simultaneously
The suppression of ripple, then adjust first-harmonic and the amplitude of three order harmonicses and phase relation by regulation modulation index, thus in photodetection
Triangular wave and square-wave signal is obtained after device.Present device is simple, has the strongest actual operability.
Owing to have employed phase-modulator, the present invention need not external dc bias voltage, eliminates due to biasing point drift
The problem that shipper pole comes.
The triangular wave that this programme produces is identical with the radio frequency signal frequency of input with the repetitive rate of square-wave signal, when change is penetrated
During the frequency of signal frequently, it is only necessary to adjust power and the dispersion values of Dispersive Devices of radiofrequency signal, make modulation index and due to color
Dissipate the phase shift caused and keep constant, it is possible to the triangular signal and the square-wave signal that obtain repetitive rate equal with radiofrequency signal are defeated
Going out, the microwave waveshape signal that therefore present invention produces has good repetitive rate tunability.
Accompanying drawing explanation
Fig. 1 is that the present invention utilizes phase-modulator and adjustable chromatic dispersion device to generate the schematic diagram of microwave waveshape signal；Fig. 2,
Fig. 3 and Fig. 4 is experimental result picture, and Fig. 2 (a) and (b) are respectively the triangular signal of generation when input local oscillation signal is 5GHz
Spectrogram and time domain beamformer；Fig. 3 (a) and (b) are respectively the frequency spectrum of the square-wave signal produced when input local oscillation signal is 5GHz
Figure and time domain beamformer；Fig. 4 (a) and (b) are respectively the triangular wave produced when input local oscillation signal is 10GHz and square-wave signal
Time domain beamformer.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are elaborated: the present embodiment is being front with technical solution of the present invention
Put and implement, give detailed embodiment and concrete operating process, but under protection scope of the present invention is not limited to
The embodiment stated:
Fig. 1 is that the present invention utilizes phase-modulator and adjustable chromatic dispersion device to generate the schematic diagram of microwave waveshape signal.Wherein phase place
Manipulator is for carrying out phase-modulation to a polarization state of light carrier, when modulation index is less, only considers light carrier and
Two or three rank optical sidebands；Signal after utilizing Sagnac ring and polarizer realization to be combined two polarization states carries out carrier wave to be pressed down
System, the Polarization Controller between Sagnac ring and the polarizer is for controlling the direction that merges of two-way polarization state, and then controls carrier wave
Amplitude and phase place；Adjustable chromatic dispersion device is for introducing different phase shifts to each rank optical sideband.
As it is shown in figure 1, in the present embodiment, device includes: light source, radio-frequency signal source, Polarization Controller 1, circulator, Sagnac
Ring, Polarization Controller 2, the polarizer, adjustable chromatic dispersion device, photodetector.Wherein Sagnac ring is by polarization beam apparatus and phase place
Manipulator is constituted.The output port of light source is connected with Polarization Controller 1, and the output port of Polarization Controller 1 is connect by circulator
Entering Sagnac ring, the outfan of radio-frequency signal source is connected, from Sagnac with the rf inputs of phase-modulator in Sagnac ring
The signal of ring output is input in Polarization Controller 2 by after circulator, connects the polarizer afterwards, defeated from the signal of polarizer output
Entering in adjustable chromatic dispersion device, then, the outfan of Dispersive Devices is connected with the input of photodetector.Finally, through photoelectricity
After detector beat frequency, triangular wave and square-wave signal are obtained at outfan.
In this example, the step that is embodied as of method is:
Step one: the continuous light wave that light source generation operation wavelength is 1550.12nm, power is 10dBm, continuous light wave is input to partially
Shake in controller 1, after Polarization Controller 1, input circulator and polarization beam apparatus.Regulation Polarization Controller 1, makes light carrier
To become 45 degree of angles incident, so that the two-way Output optical power of polarization beam apparatus is equal respectively with polarization beam apparatus two axle.Penetrate
Frequency source signal output frequency is the local oscillation signal of the 5GHz phase place for drive half-wave voltage be 6-7V, with a width of more than 30GHz
Manipulator.
Step 2: polarization beam apparatus optical signal clockwise out enters phase-modulator, obtains phase-modulation, and modulation index is relatively
Hour, output only comprises carrier wave and one two three rank optical sidebands.Polarization beam apparatus optical signal counterclockwise out is at phase-modulator
The most do not modulated, simply a light carrier.Clockwise signal after modulation and light carrier counterclockwise are at polarization beam apparatus
Place is complex as the light beam with two polarization states, is exported by circulator.
Step 3: enter the polarizer, the optical signal of two polarization states after light polarization modulator 2 from the optical signal of circulator output
A branch of polarized light is synthesized at the polarizer.Control the phase contrast of two polarization state lights by regulation light polarization modulator 2, and with rise
The angle of device main shaft partially, it is possible to achieve the suppression to light carrier arbitrary extent.Therefore, the signal from polarizer output is that carrier wave obtains
A branch of line polarized light to suppression.
Step 4: enter adjustable chromatic dispersion device from the signal of polarizer output and introduce dispersion, carry out subsequently into photodetector
Opto-electronic conversion.
Step 5: regulation dispersion values, can make second harmonic in the signal of telecommunication detected be inhibited.By regulation radiofrequency signal
Source amplitude changes the modulation index of phase-modulator, can change the ratio of the amplitude of first-harmonic and three order harmonicses in the signal of telecommunication.After tuning
Finally produce the repetitive rate triangular wave equal with radio frequency signal frequency and square-wave signal.Fig. 2 is raw after photodetector
The signal of telecommunication spectrogram become and the triangular wave waveform observed by oscillograph.The main electricity spectrum ultimately generated is found out by Fig. 2 (a)
For first-harmonic and triple-frequency harmonics, i.e. 5GHz and 15GHz, the power 19.34dBm less than the power of first-harmonic of triple-frequency harmonics, meet amplitude
Ratio is the condition of 9, and the power of second harmonic 33dBm less than fundamental power simultaneously substantially meets the condition to second harmonic suppression.
Fig. 3 is the electrical domain spectrogram generated after photodetector and the square-wave waveform observed eventually through oscillograph.By Fig. 3
A () finds out that the main electricity spectrum ultimately generated is first-harmonic and triple-frequency harmonics, i.e. 5GHz and 15GHz, the power of triple-frequency harmonics compares first-harmonic
Little 9.6dBm, meeting first-harmonic with triple-frequency harmonics Amplitude Ratio is the condition of 3, and second harmonic 46.1dBm less than first-harmonic simultaneously, it is right to meet
The condition of second harmonic suppression.Be can be seen that by Fig. 2 (b) and Fig. 3 (b) and finally create triangular wave and square-wave signal, and signal
Repetitive rate is 5GHz, meets expection.
This example demonstrates the repetitive rate tunability of described invention simultaneously.When the frequency of input radio frequency signal is 10GHz
Time, the corresponding dispersion values regulating adjustable chromatic dispersion device, and the amplitude of radio-frequency signal source, other experimental procedures with the above,
Test the triangular wave obtained and square-wave waveform respectively as shown in Fig. 4 (a) and (b).Can be seen that the frequency shift when radiofrequency signal
Time, still can obtain triangular wave and square-wave signal by this device, and the repetitive rate of output microwave waveshape signal is equal to radio frequency
Signal frequency.
To sum up, the present invention utilize phase-modulator, adjustable chromatic dispersion device and Sagnac ring achieve triangular signal and
The generation of square-wave signal, simple in construction is easily achieved, cheap, is not affected by electronic bottleneck.Additionally, the phase-modulation used
Device need not extra DC bias circuit, eliminates due to the impact of direct current biasing point drift, and system stability is good.
In a word, embodiments described above is only embodiments of the invention, is not only used for limiting the guarantor of the present invention
Protect scope, it is noted that for those skilled in the art, in present disclosure, it is also possible to
Making some equivalent variations and replacement, the frequency range of millimeter wave is not limited to 5GHz and 10GHz, if using the radio frequency of 40GHz
Local oscillator, this system can produce triangular wave or the square-wave signal of repetitive rate 40GHz.These equivalent variations and replacement and frequency model
The adjustment enclosed also should be regarded as the scope of protection of the invention.
Claims (3)
1. one kind utilizes phase-modulator, adjustable chromatic dispersion device and Sagnac (Sagnac) ring to produce triangular wave and square-wave signal
Device, including light source, radio-frequency signal source, circulator, Sagnac ring, Polarization Controller, the polarizer, adjustable chromatic dispersion device
And photodetector (TDCM), it is characterised in that: Sagnac ring is arranged on the emitting light path of light source, and and light path between connect
Being connected to a Polarization Controller, Sagnac ring outfan is sequentially connected with another Polarization Controller and the polarizer, the polarizer defeated
Going out the input terminated into adjustable dispersion device, the outfan of described adjustable dispersion device connects photodetector.
Described Sagnac ring is made up of polarization beam apparatus, phase-modulator.Described polarization beam apparatus will be from circulator output light letter
Number two polarization states separately, form the optical signal that two-way power is equal, wherein a road in Sagnac ring along clockwise direction
Transmission, transmits in another Lu Huan in the counterclockwise direction.The rf inputs input sinusoidal radio frequency signal of phase-modulator, utilizes
The inherent character of phase-modulator, the optical signal entering phase-modulator along clockwise direction obtains phase-modulation, and counterclockwise
The optical signal that direction enters is not modulated, and two paths of signals synthesizes a road at polarization beam apparatus and has the light of two polarization states
Signal (one of them polarization state is phase modulated signal, and another polarization state only has light carrier) exports from Sagnac ring.
Connect after described Sagnac ring and have Polarization Controller and the polarizer.By regulation Polarization Controller, by two at the polarizer
Individual polarization state has synthesized the line polarized light in a direction, and the polarizer is output as a linearly polarized photon, it is achieved that to output letter
The amplitude of number light carrier and the control of phase place.The outfan of the polarizer is input to adjustable chromatic dispersion device, utilizes adjustable chromatic dispersion device
Each rank sideband of modulated signal is introduced different phase shifts, the dispersion values of dispersor is rationally set, it is achieved signal of telecommunication second harmonic
Suppression.Regulation radio-frequency signal source amplitude changes the modulation index of phase-modulator, can regulate in the signal of telecommunication first-harmonic and three times
The ratio of the amplitude of harmonic wave.
Optics the most according to claim 1 produces the device of micro-waveshape signal, it is characterised in that: in described Sagnac ring
Manipulator is phase-modulator, it is not necessary to extra DC bias circuit.
Optics the most according to claim 1 produces the device of microwave waveshape signal, it is characterised in that: can be loaded by adjustment
The frequency of radiofrequency signal to phase-modulator adjusts the repetitive rate of produced triangular wave and square-wave signal.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707309A (en) * | 2017-10-13 | 2018-02-16 | 南京航空航天大学 | The orthogonal frequency mixing method of microwave photon, device based on cascade phase and light polarization modulator |
| CN111010172A (en) * | 2019-11-05 | 2020-04-14 | 东南大学 | Frequency-tunable frequency-doubling triangular wave and square wave generating device and method |
| CN111466874A (en) * | 2020-03-12 | 2020-07-31 | 西安电子科技大学 | Diffusion optical tomography system based on square wave modulation |
| CN111953426A (en) * | 2020-08-04 | 2020-11-17 | 中国舰船研究设计中心 | Photon-assisted ultra-wideband millimeter wave receiver based on Sagnac ring |
| CN112469958A (en) * | 2018-07-04 | 2021-03-09 | 阿里尔科学创新有限公司 | Method and system for determining grating perturbation by modulating light |
| CN112511225A (en) * | 2020-10-27 | 2021-03-16 | 南方科技大学 | Polarization modulation indoor wireless optical communication system front-end structure and system |
| CN113078953A (en) * | 2020-01-04 | 2021-07-06 | 西安电子科技大学 | Method for simultaneously realizing linear optimization and power periodic fading compensation in analog photon down-conversion link |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183303A (en) * | 2011-02-23 | 2011-09-14 | 上海大学 | Comb spectrum generating system and method based on circulating frequency shift mode |
| CN104022830A (en) * | 2014-01-21 | 2014-09-03 | 西安电子科技大学 | Device and method for generating eight frequency multiplication millimeter waves by utilizing Mach-Zehnder modulator |
| CN105007120A (en) * | 2015-07-08 | 2015-10-28 | 北京邮电大学 | Eightfold-frequency optical millimeter wave generation method and system based on polarization modulator cascading |
-
2016
- 2016-05-27 CN CN201610392386.4A patent/CN106100748B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183303A (en) * | 2011-02-23 | 2011-09-14 | 上海大学 | Comb spectrum generating system and method based on circulating frequency shift mode |
| CN104022830A (en) * | 2014-01-21 | 2014-09-03 | 西安电子科技大学 | Device and method for generating eight frequency multiplication millimeter waves by utilizing Mach-Zehnder modulator |
| CN105007120A (en) * | 2015-07-08 | 2015-10-28 | 北京邮电大学 | Eightfold-frequency optical millimeter wave generation method and system based on polarization modulator cascading |
Non-Patent Citations (4)
| Title |
|---|
| YONGSHENG GAO ET AL: ""Photonic Generation of Triangular Pulses Based on Phase Modulation and Spectrum Manipulation"", 《IEEE PHOTONICS JOURNAL》 * |
| YONGSHENG GAO ET AL: ""Photonic versatile waveform generation based on phase modulation in Sagnac loop"", 《ELECTRONICS LETTERS》 * |
| 原荣编著: "《光纤通信技术》", 31 August 2011, 机械工业出版社 * |
| 董天临等编著: "《光纤通信》", 31 May 2012, 清华大学出版社 * |
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| CN107707309A (en) * | 2017-10-13 | 2018-02-16 | 南京航空航天大学 | The orthogonal frequency mixing method of microwave photon, device based on cascade phase and light polarization modulator |
| CN107707309B (en) * | 2017-10-13 | 2019-09-06 | 南京航空航天大学 | The orthogonal frequency mixing method of microwave photon, device based on cascade phase and light polarization modulator |
| CN112469958A (en) * | 2018-07-04 | 2021-03-09 | 阿里尔科学创新有限公司 | Method and system for determining grating perturbation by modulating light |
| US11698277B2 (en) | 2018-07-04 | 2023-07-11 | Ariel Scientific Innovations Ltd. | Method and system for determining grating perturbation by modulated light |
| CN111010172A (en) * | 2019-11-05 | 2020-04-14 | 东南大学 | Frequency-tunable frequency-doubling triangular wave and square wave generating device and method |
| CN111010172B (en) * | 2019-11-05 | 2022-11-18 | 东南大学 | Frequency-tunable frequency-doubling triangular wave and square wave generating device and method |
| CN113078953A (en) * | 2020-01-04 | 2021-07-06 | 西安电子科技大学 | Method for simultaneously realizing linear optimization and power periodic fading compensation in analog photon down-conversion link |
| CN111466874A (en) * | 2020-03-12 | 2020-07-31 | 西安电子科技大学 | Diffusion optical tomography system based on square wave modulation |
| CN111953426A (en) * | 2020-08-04 | 2020-11-17 | 中国舰船研究设计中心 | Photon-assisted ultra-wideband millimeter wave receiver based on Sagnac ring |
| CN111953426B (en) * | 2020-08-04 | 2021-11-23 | 中国舰船研究设计中心 | Photon-assisted ultra-wideband millimeter wave receiver based on Sagnac ring |
| CN112511225A (en) * | 2020-10-27 | 2021-03-16 | 南方科技大学 | Polarization modulation indoor wireless optical communication system front-end structure and system |
| CN112511225B (en) * | 2020-10-27 | 2021-12-28 | 南方科技大学 | Polarization modulation indoor wireless optical communication system front-end structure and system |
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