CN102694577B - Method for generating pulse signal for ultra-wideband pulse signal device - Google Patents
Method for generating pulse signal for ultra-wideband pulse signal device Download PDFInfo
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- CN102694577B CN102694577B CN201210186263.7A CN201210186263A CN102694577B CN 102694577 B CN102694577 B CN 102694577B CN 201210186263 A CN201210186263 A CN 201210186263A CN 102694577 B CN102694577 B CN 102694577B
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Abstract
The invention discloses a device and a method for generating an ultra-wideband pulse signal by laser. An optical fiber soliton laser device is provided with an optical fiber coupler, soliton optical fiber laser which generates a bright soliton is inputted into a time delayer through the optical fiber coupler, the time difference between the bright soliton and a dark soliton is controlled by controlling the time delayer, the two solitons between which the time difference is controlled are inputted into an ultra-wideband pulse generator to generate the required ultra-wideband pulse signal, and the optical fiber coupler is connected with a soliton shaper to change the shape of the ultra-wideband pulse signal; and the method for generating the ultra-wideband pulse signal by the laser is implemented by the combination of the bright soliton and the dark soliton which are generated by the optical fiber soliton laser device. According to the device and the method, an all optical fiber method is used for generating the ultra-wideband pulse signal for the first time, a bright pulse and a dark pulse are changed by controlling the optical fiber soliton laser device, and the spectrum width of the ultra-wideband pulse signal is regulated according to requirements.
Description
Technical field
The present invention relates to a kind of ultra-wideband impulse signal devices and methods therefor, a kind of soliton fiber laser that utilizes produces bright, the Dark solition devices and methods therefor for generation of ultra-wideband impulse signal specifically.
Background technology
Ultra-short pulse flushing system, using the ultrashort impulse of low duty ratio as carrier, without the need to carrier modulation, adopts spread spectrum (TH-ultra-wideband pulse) or direct sequence spread spectrum (DS-ultra-wideband pulse) technology when jumping to realize information transmission.Ultra-wideband pulse is the radiotechnics of transmission of digital data in the frequency range 3.1GHz-10.6GHz of whole non-constant width.It uses the ultra low transmission power being usually less than-41dBm/MHz, and therefore, this technology can be included in other existing transmission frequencies completely, such as WI-FI, GSM and bluetooth, this means that ultra-wideband pulse can coexist with other radio-frequency technique.In addition, radio ultra wide band system has that penetration power is strong, low in energy consumption, anti-multipath, effective, fail safe is high, system complexity is low, can provide the advantages such as accurate positioning precision.Therefore, super-broadband tech can be applied to locating and tracking and the navigation of object and people, and can provide very accurate positioning precision.It can realize 110Mbps data rate transmission in the distance range of 10-15m.
Because ultra-wideband pulse has above-mentioned advantage, so it has wide practical use, produce ultra-wideband impulse signal method:
1) produce based on circuit: by clock signal differential to be used as input pulse, and modulate this Puled input with data-signal, mixed signal by second time differential to produce ultra-wideband impulse signal, CN1926774A patent disclosed in existing document.
2) produce based on software control: utilize the method for software radio to obtain the technology of ultra-wideband pulse burst pulse.What it related generally to is impulse ultra broadband, and its cardinal principle utilizes burst pulse to carry the communication information, CN 102045045A patent disclosed in existing document.
3) based on the pulse ultra-broadband communication system of CS theory, by the Sparse Least in digital signal processor, input is introduced in CS theory, the random precoding module that aggregate transmission end increases, ultra-wideband pulse channel and low speed sampler realize the effective observation to the digital signal X that transmitting terminal sends, if publication number is the patent of CN 102104396A.
4) propose to produce with the harmonic signal of the frequency range with ultra-wideband pulse the signal needing frequency, as existing disclosed document CN 101106354A, the method and system of the ultra-wideband pulse radio communication of service band modulation FBM.Wherein, produce ultra-wideband impulse signal method as: in units of predetermined number n-bit by digital data packets to produce bit group, and modulation bit group is to generate the ultra-wideband impulse signal of m subband of the different center frequency of the Type mapping had according to each bit group, sees that publication number is CN1578286A patent.
Summary of the invention
The technical problem to be solved in the present invention be choose suitable parameters optical fiber soliton laser to produce the good Bright solitons of shape and Dark solition, and in conjunction with delayer and orphan's reshaper to realize the output being produced ultra-wideband impulse signal by all-fiber method, namely provide a kind of photoproduction ultra-wideband impulse signal devices and methods therefor.
The present invention realizes the technical scheme that measure that above-mentioned purpose takes is a kind of photoproduction ultra-wideband impulse signal devices and methods therefor.
A kind of photoproduction ultra-wideband impulse signal device of the present invention, described in it, photoproduction ultra-wideband impulse signal device is the device that optical fiber soliton laser produces for photoproduction ultra-wideband impulse signal, includes optical fiber soliton laser and ultra-wideband pulse signal generator; Wherein:
Fiber coupler is provided with in described optical fiber soliton laser, delayer is provided with in one of them optical fiber soliton laser, the time difference controlling between bright, Dark solition by regulating delayer, two of regulation time difference kinds of orphans are inputted ultra-wideband pulse signal generator and produce required ultra-wideband impulse signal, the soliton pulse reshaper in ultra-wideband pulse signal generator can change ultra-wideband impulse signal shape.
In above-mentioned photoproduction ultra-wideband impulse signal device technique scheme, additional technical characteristic is: described optical fiber soliton laser is the one in doped fiber ring laser, linear laser cavity and splayed configuration fiber laser; Described photoproduction ultra-wideband pulse signal generator is made up of soliton pulse reshaper, output optical fibre coupler and photodetector, and its effect makes bright, Dark solition realize photoproduction ultra-wideband impulse signal, and can change ultra-wideband impulse signal shape as required.
The present invention is a kind of pulse signal production method for above-mentioned photoproduction ultra-wideband impulse signal device, and method described in it is that bright, the Dark solition produced by optical fiber soliton laser is combined and realize photoproduction ultra-wideband impulse signal.
In the method and technology scheme of above-mentioned photoproduction ultra-wideband impulse signal device, additional technical characteristic is: described optical fiber soliton laser is the one in doped fiber ring laser, linear laser cavity and splayed configuration fiber laser; Pulse delay unit in described optical fiber soliton laser controls time interval between orphan to reach psec or femtosecond magnitude; Described photoproduction ultra-wideband pulse signal generator is that it makes bright, Dark solition formation photoproduction ultra-wideband impulse signal; Orphan's reshaper in described photoproduction ultra-wideband pulse signal generator is the shape controlling photoproduction ultra-wideband impulse signal, makes frequency spectrum that is bright, dark pulse consistent with photoproduction ultra-wideband impulse signal frequency spectrum.
A kind of photoproduction ultra-wideband impulse signal devices and methods therefor that the present invention is above-mentioned, with compared with first technology, the feature that the present invention gives prominence to is: use all-fiber to produce ultra-wideband impulse signal first, choose the optical fiber soliton laser of suitable parameters to produce the good Bright solitons of shape and Dark solition, and in conjunction with delayer and orphan's reshaper to realize the output being produced ultra-wideband impulse signal by all-fiber method.This device is not only easy to carry about with one, and also because can change width that is bright, dark pulse by the relevant parameter of adjustment optical fiber soliton laser, thus can adjust the spectrum width of ultra-wideband impulse signal as required.In addition, because orphan has good anti-interference, conformality, so can stably propagate in a fiber.These advantages are that ultra-wideband impulse signal provides reliable guarantee in the extensive use of communication.Therefore, realize a kind of photoproduction ultra-wideband impulse signal devices and methods therefor provided by the present invention, will promote that the development of orphan in optical communication and ultra-wideband impulse signal are in the application of communication aspects.
Accompanying drawing explanation
In order to understand the present invention better, and clearlying show that how to realize the present invention, will only come with reference to accompanying drawing with the method for example.
Fig. 1 is that the present invention uses the all-optical methods of soliton fiber laser to produce the structural representation of the devices and methods therefor of ultra-wideband impulse signal.
Fig. 2 is the structural representation at the present invention's ultra-wideband pulse signal generator used.
In figure: 1: laser one pumping source; 2: laser one wavelength division multiplexer; 3: laser one front end Polarization Controller; 4: laser one polarization-dependent isolator; 5: laser one Er-doped fiber; 6: laser one rear end Polarization Controller; 7: laser one output coupler; 8: laser one orphan reshaper; 9: photodetector; 10: output optical coupler; 11: laser two orphan reshaper; 12: laser two output coupler; 13: laser two rear end Polarization Controller; 14: laser two optical delay line; 15: laser two polarization-dependent isolator; 16: laser two Er-doped fiber; 17: laser two front end Polarization Controller; 18: laser two wavelength division multiplexer; 19: laser two pumping source; 20: UWB Pulse Generator; 21: bright pulse; 22: dark pulse; 23: ultra-broadband signal I; 24 ultra-broadband signals II.
Embodiment
Below the specific embodiment of the present invention is further illustrated.
The present invention is based on and use optical fiber soliton laser can produce single Bright solitons and single Dark solition, propose two orphans to input ultra-wideband pulse signal generator to produce required ultra-wideband impulse signal, thus realize using all-fiber to produce ultra-wideband impulse signal.
Because optical fiber has good pliability, thus have that volume is little, the feature such as be easy to carry about with one, realize technical scheme of the present invention and need the optical fiber soliton laser that two parameters are different, and in conjunction with delayer and orphan's reshaper, the full light realizing fiberize produces ultra-wideband impulse signal.
Implement a kind of photoproduction ultra-wideband impulse signal devices and methods therefor of the present invention, comprise the optical fiber soliton laser with delay line, ultra-wideband pulse signal generator and orphan's reshaper, wherein:
Apparatus of the present invention structure utilizes 976nm pumping source, mixes Er
3+optical fiber, optical isolator, wavelength division multiplexer and output coupler that online polarization is relevant are formed, the pulse mode-locked technology of nonlinear polarization ELLIPTIC REVOLUTION is utilized to realize fiber laser one and fiber laser two, and by adopting different optical fiber dispersions to make fiber laser be operated in Bright solitons and Dark solition output state respectively at fiber laser one and fiber laser two, by the adjustment of the optical delay line in fiber laser two, bright Dark solition being exported synchronous, realizing the generation of ultra-wideband impulse signal by combining eventually through bright Dark solition.
The operation principle that fiber laser one produces Dark solition is as follows:
The pumping laser of 976nm is adopted to enter in fiber optic loop through wave division multiplex coupler, through mixing Er
3+carrying out gain amplification in optical fiber, because common fiber work is in negative dispersion region, by adopting the method for nonlinear polarization rotation locked mode, the output of Bright solitons in chamber can be realized.In annular chamber, the shaping of Bright solitons becomes a linearly polarized light primarily of after initial light pulse (being caused by noise) experience isolator relevant with polarization, linearly polarized light becomes an elliptically polarized light after a Polarization Controller, elliptically polarized light can be broken down into two orthogonal, there is the linearly polarized light of varying strength, these two linearly polarized lights will accumulate different nonlinear phase shifts when transmitting in non-linear Kerr medium (optical fiber), cause the front and back of the peakedness ratio light pulse of light pulse along the more nonlinear phase shift of experience, the Polarization Controller of adjustment before optical isolator, the polarization direction of the isolator making the polarization direction of light pulse relevant with polarization in the same way, the peak value of pulse is made to experience minimal losses and pass through, and make the front and back both wings compression of light pulse thus light pulse locked mode occurs to narrow, its effect is equivalent to the effect of saturable absorber.
The operation principle that fiber laser two produces Dark solition is as follows:
The pumping laser of 976nm is adopted to enter in fiber optic loop through wave division multiplex coupler, through mixing Er
3+carry out gain amplification in optical fiber, in whole chamber, adopt dispersion managed fiber, mix Er
3+optical fiber adopts positive dispersion fiber, by adopting the method for nonlinear polarization rotation locked mode, making overall laser be operated in positive dispersion region, can realize the output of Dark solition in chamber.
The semiconductor laser of 976nm of the present invention mixes Er3+ as pumping source pumping, utilize the optical fiber of different dispersion parameters, build two fiber lasers, due to the difference of intra-cavity dispersion, make it be operated in different working regions, adopt nonlinear polarization rotation mode-locking technique, laser is made to be operated in bright, Dark solition region respectively, in laser two chamber, add optical delay line, make fiber laser one and fiber laser two export synchronously, by the shape of orphan's reshaper regulating impulse.
Operation principle is as follows: fiber laser one passes through laser one wavelength division multiplexer 2 by coupling pump light in laser cavity by laser one pumping source 1, this pumping source adopts monomode fiber to export, this make we directly can be realized the connection of itself and wavelength division multiplexer by welding, avoid the coupling being realized optical-fiber laser by fiber adjusting mount, add the stability of system.Pump light enters into fiber optic loop inside-pumping laser one Er-doped fiber 5, and the extra-pulse mode-locking technique of nonlinear polarization rotation is by laser one front end Polarization Controller 3, and laser one polarization-dependent isolator 4 and laser one rear end Polarization Controller 6 realize.Laser works can be made in stable mode-lock status by regulating the position of laser one front end Polarization Controller 3 and laser one rear end Polarization Controller 6.Laser one output optical fibre coupler 7 is for exporting the locked mode Bright solitons pulse-couple in chamber, a part is transported to laser one orphan reshaper 8, for shaping pulse, for generation of ultra-wideband impulse signal, another part detects in real time for monitoring the locked mode Bright solitons forming erbium doped fiber laser, comprises the stability of locked mode, output spectrum, power output etc.
Fiber laser two-way cross laser two pumping source 19 by laser two wavelength division multiplexer 18 by coupling pump light in laser cavity, this pumping source adopts monomode fiber to export, this make we directly can be realized the connection of itself and wavelength division multiplexer by welding, avoid the coupling being realized optical-fiber laser by fiber adjusting mount, add system stability.Pump light enters into fiber optic loop inside-pumping laser two Er-doped fiber 16, the extra-pulse mode-locking technique of nonlinear polarization rotation is by laser two front end Polarization Controller 17, and laser two polarization-dependent isolator 15 and laser two rear end Polarization Controller 13 realize.Laser works can be made in stable mode-lock status by regulating the position of laser two front end Polarization Controller 17 and laser two rear end Polarization Controller 13.Laser two output optical fibre coupler 12 is for exporting the Dark solition pulse-couple in chamber, a part is transported to laser two orphan reshaper 11, for shaping pulse, for generation of ultra-wideband impulse signal, another part detects in real time for monitoring the locked mode Dark solition forming erbium doped fiber laser, comprises the stability of locked mode, output spectrum, power output etc.
Laser two optical delay line 14 is mainly used for regulating the output frequency of laser two Dark solition pulse, to ensure that fiber laser one and fiber laser two export synchronously.
The light that laser one output optical fibre coupler 7 and laser two output optical fibre coupler 12 export, be combined in optical fiber by output optical fibre coupler 10, convert light signal to transmitting and transmission that the signal of telecommunication can realize ultra-wideband impulse signal by photodetector 9.
In the optical fiber soliton laser one be made up of device 1-7, polarization-dependent isolator makes output light become linearly polarized light, and make light unidirectional operation in optical fiber soliton laser; Polarization Controller makes the linearly polarized light of generation become elliptically polarized light; Er-doped fiber is the amplification realizing light, and other rare-earth-ion-doped optical fiber in fact also can be adopted to realize the amplification of light; And the use of monomode fiber is to form dispersion management with Er-doped fiber, realizing the generation of orphan, in fact also can adopt dispersion decreasing fiber or dispersion shifted optical fiber.In the optical fiber soliton laser two be made up of device 12-19, design parameter can be determined according to the difference producing orphan's type when choosing optical fiber.
As in Fig. 1,1-7 can form optical fiber soliton laser one, is used to produce Bright solitons, and 12-19 can form optical fiber soliton laser two, is used to produce Dark solition, delayer that laser two optical delay line 14 is made up of monomode fiber.
As the effect that Fig. 2 is the UWB Pulse Generator 20 be made up of orphan's reshaper 8, output optical fibre coupler 10 and photodetector 9, that is: bright, Dark solition is made namely as the bright pulse 21 in Fig. 2, dark pulse 22 are coupled to one piece, form ultra-wideband impulse signal, namely as the ultra-broadband signal I 23 in Fig. 2, ultra-broadband signal II 24.
In the present invention, the relative position forming the device of optical fiber soliton laser can change.The delayer be made up of monomode fiber, can be connected on any one fiber coupler of two optical fiber soliton lasers.
It should be noted that word " comprises " not getting rid of and be different from element listed in claim or the existence of step, and " one " does not get rid of two, and multiple.Any reference number in claim all not should be understood to limit its scope.
Claims (2)
1., for a pulse signal production method for photoproduction ultra-wideband impulse signal device, method described in it is that Bright solitons, the Dark solition produced by optical fiber soliton laser is combined and realize photoproduction ultra-wideband impulse signal;
The photoproduction ultra-wideband impulse signal device of described pulse signal production method, comprises optical fiber soliton laser, UWB Pulse Generator; It is characterized in that:
Described optical fiber soliton laser is that it is provided with fiber coupler, is provided with delayer in one of them optical fiber soliton laser; The time difference between Bright solitons, Dark solition is controlled by adjustment delayer, two of regulation time difference kinds of orphans are inputted UWB Pulse Generator and produce required ultra-wideband impulse signal, be provided with orphan's reshaper in ultra-wideband pulse signal generator and be used for changing ultra-wideband impulse signal shape;
Wherein, described delayer adapts in the time interval controlled between bright Dark solition, makes its time interval reach psec or femtosecond magnitude, to produce photoproduction ultra-wideband impulse signal; Described orphan's reshaper is the shape controlling photoproduction ultra-wideband impulse signal, make bright pulse, dark pulse frequency spectrum consistent with photoproduction ultra-wideband impulse signal frequency spectrum; Described ultra-wideband pulse signal generator makes Bright solitons, Dark solition form photoproduction ultra-wideband impulse signal.
2. the method for claim 1, optical fiber soliton laser described in it is the one in doped fiber ring laser, linear laser cavity and splayed configuration fiber laser.
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| CN109326946A (en) * | 2018-12-07 | 2019-02-12 | 中国人民解放军国防科技大学 | Dark pulse excitation assembly and dark pulse fiber laser based on black phosphorus |
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| CN110221445A (en) * | 2019-06-25 | 2019-09-10 | 深圳大学 | Circular polarization orphan generation device and multi-photon micro imaging system |
| CN112688154B (en) * | 2020-12-25 | 2021-10-26 | 太原理工大学 | Device and method for generating high-quality pulse train based on Peregrine soliton |
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