CN206993129U - The Chaotic Wideband Signal generating means that centre wavelength is tunable - Google Patents
The Chaotic Wideband Signal generating means that centre wavelength is tunable Download PDFInfo
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- CN206993129U CN206993129U CN201720578585.4U CN201720578585U CN206993129U CN 206993129 U CN206993129 U CN 206993129U CN 201720578585 U CN201720578585 U CN 201720578585U CN 206993129 U CN206993129 U CN 206993129U
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Abstract
The Chaotic Wideband Signal generating means that a kind of centre wavelength of the utility model is tunable.The Chaotic Wideband Signal generating means that the utility model centre wavelength is tunable includes：Weak resonator fabry perot laser WRC FPLD output first passes around a first optical circulator OC1, then it is two parts to be divided by the first fiber coupler FC1, a part is reflected after ginseng erbium erbium-doped optical fiber amplifier EDFA amplification by tunable fiber Bragg grating TFBG, and reflected light is fed back to weak resonator fabry perot laser WRC FPLD intracavitary again after Polarization Controller PC, adjustable attenuator VA, the second fiber coupler FC2 and the first optical circulator OC1 successively；The output of another part then enters detection system, the detection system includes a photoelectric detector PD, one electricity spectrum analyzer and a spectroanalysis instrument, Polarization Controller PC is used for the polarization state for controlling feedback light, variable attenuator VA is used for the feedback power for adjusting feedback light, and light power meter PM is used for the luminous power for detecting feedback light.
Description
Technical field
It the utility model is related to a kind of tunable Chaotic Wideband Signal generating means of centre wavelength.
Background technology
Based on optical chaos signal caused by semiconductor laser because it is in the generation of high speed random number, optical chaos radar and light
The application of chaotic secret communication etc. and widely paid close attention to.Especially in optical chaos secret communication, semiconductor laser
Caused optical chaos signal is due to can preferably and existing fiber Web-compatible and higher security excite domestic and international
The research enthusiasm of person.In optical chaos secret communication, similar to noise optical chaos signal in transmitting terminal by as chaotic carrier
To load the signal of required transmission, and it is subtracted, then is filtered after processing i.e. in principle of the receiving terminal based on Chaotic Synchronous
The signal transmitted originally can be recovered.Using the optical chaos signal of similar noise as light carrier, it can effectively hide what is be transmitted
Actual signal, and the demodulation mode based on Chaotic Synchronous, also further increase the security of optical chaos secret communication.In order to carry
The message transmission rate and security of bloom chaotic secret communication, current method are that searching chaos bandwidth is bigger, and dynamics is multiple
Miscellaneous Du Genggao chaotic signal is used as chaotic carrier.
In recent years, wavelength-division multiplex (Wave length Division Multiplex, WDM) structure has also been entered light and mixed
In ignorant secret signalling.Zhang scheduling theories have studied wavelength-division multiplex chaotic optical communication (COC) and traditional fiber optic communication
(CFOC) system, the internal channel cross-interference issue of COC systems and CFOC systems is discussed.It is more by introducing two chaos light injections
Mould semiconductor laser, Jiang scheduling theories have studied the WDM optical chaos secret signallings of security enhancing.In addition, related
Experimental study is also reported in succession.Paul etc. produces two-way chaotic carrier by using two external cavity feedback semiconductor lasers,
Experiment confirms the feasibility of two-channel chaotic secret communication.The experimental studies such as Matsuura are in two pairs of single channel couplings
Nd:The wavelength-division multiplex system of YVO4 laser constitutions simultaneously successfully realizes two-way optical chaos secret communication.Argyris etc. passes through
Ground using a distributed Feedback semiconductor laser (DFB-SL) and two integrated semiconductor lasers as transmitting terminal, experiment
Study carefully one and be based on the optical chaos secret signalling of dense wave division multipurpose (DWDM) structure, and successfully realize 1.25Gb/s
The encrypted transmission of signal.For a WDM optical chaos secret signalling, it is desirable to the center of chaotic carrier
Wavelength can tune on a large scale.However, common at present commercial Distributed Feedback Laser or vertical cavity surface emitting laser
(VCSELs) centre wavelength can only tune with the problem of overregulating bias current or laser in less wave-length coverage.
And the bandwidth of the chaotic signal as chaotic carrier is also the key of a raising optical chaos secret communication signal transmission rate
Factor.
Utility model content
The purpose of this utility model is to provide one kind in wave division multiplexing WDM system, and a wavelength range interior energy enough accommodates
The number of channel more tunable Chaotic Wideband Signal generating means of centre wavelength.
To reach above-mentioned purpose of utility model, the Chaotic Wideband Signal that the utility model centre wavelength is tunable fills
Put, the exocoel by the use of Fiber Bragg Grating FBG as weak resonator fabry-Perot type laser is tunable to produce centre wavelength
Broadband light chaotic signal；
Weak resonator fabry-Perot type laser WRC-FPLD output first passes around a first optical circulator OC1, defeated
Enter the first fiber coupler FC1, then by tunable fiber Bragg grating after ginseng erbium erbium-doped optical fiber amplifier EDFA amplification
TFBG reflects, and reflected light passes through Polarization Controller PC, adjustable attenuator VA, the second fiber coupler FC2 and first ring of light successively
Weak resonator fabry-Perot type laser WRC-FPLD intracavitary is fed back to after shape device OC1 again；
Wherein, weak resonator fabry-Perot type laser WRC-FPLD bias current and temperature are by a ultra-low noise
Controlled with the LD pulsed source of high-temperature accuracy.
Further, weak resonator fabry-Perot type laser WRC-FPLD temperature is fixed on 20.02 DEG C, biased electrical
Stream I is fixed as 35mA.
Further, tunable fiber Bragg grating TFBG parameter：Tunable wavelength scope 1544.00nm~
1556.00nm three dB bandwidth:0.28nm.
Further, in addition to the first optical circulator OC1 output light by the first fiber coupler FC1 be divided to be two
Point, a part is reflected after ginseng erbium erbium-doped optical fiber amplifier EDFA amplification by tunable fiber Bragg grating TFBG, another portion
The output divided then enters detection system, and the detection system includes a photoelectric detector PD, and an electricity composes analyzer and one
Spectroanalysis instrument, Polarization Controller PC are used for the polarization state for controlling feedback light, and variable attenuator VA is used to adjust the anti-of feedback light
Power is presented, light power meter PM is used for the luminous power for detecting feedback light.
The advantages of Chaotic Wideband Signal generating means that the utility model centre wavelength is tunable is relative to prior art.
It is tunable to produce centre wavelength using the weak resonator fabry-Perot type laser (WRC-FPLD) of FBG exocoels
Broadband light chaotic signal.Compared with traditional FP lasers, WRC-FPLD front end face is coated with anti-reflection film, therefore its front end face
The common FP lasers of luminance factor are lower, and generally 1% to 30%, therefore WRC-FPLD has broader gain spectral.Meanwhile by
It is longer than traditional FP laser devices in WRC-FPLD chamber length, reach about 600 μm, so WRC-FPLD longitudinal mode spacing is more
Small, this means that in a wdm system, and the number of channel that a wavelength range interior energy enough accommodates is more.
Brief description of the drawings
Fig. 1 is to utilize the tunable Chaotic Wideband Signal generating means embodiment checking test of the utility model centre wavelength
Circuit diagram；
Weak resonator fabry-Perot type laser WRC-FPLD P I curves and as bias current I during Fig. 2 free-running operations
Spatial distribution during=35mA；
The spectrum (a) of each longitudinal modes of WRC-FPLDs of the Fig. 3 in FBG adjustable extents, the maximum that each longitudinal mode can reach
Chaos bandwidth (b) and reach feedback power corresponding during maximum chaos bandwidth.
Embodiment
Cardiac wave during the utility model is produced using the weak resonator fabry-Perot type laser (WRC-FPLD) of FBG exocoels
Long tunable broadband light chaotic signal.Compared with traditional FP lasers, WRC-FPLD front end face is coated with anti-reflection film, therefore
Its front facet reflectivity is lower than common FP lasers, and generally 1% to 30%, therefore WRC-FPLD has broader gain
Spectrum.Simultaneously as WRC-FPLD chamber length is longer than traditional FP laser devices, reach about 600 μm, so WRC-FPLD's is vertical
Mode spacing is smaller, and this means that in a wdm system, and the number of channel that a wavelength range interior energy enough accommodates is more.It make use of one
The FBG that individual centre wavelength is tunable is used as WRC-FPLD exocoel, and provides distributed light feedback.Because FBG reflection has
There is wavelength selectivity, when the centre wavelength for adjusting FBG changes in tunable range, each corresponding WRC-FPLD longitudinal mode
Chaos state can be entered, while the centre wavelength of the chaotic output can tune to a wide range.
Embodiment
The Chaotic Wideband Signal generating means that the present embodiment centre wavelength is tunable, effect progress is carried out by hookup
Verification experimental verification, specifically FBG exocoels WRC-FPLD experimental provision schematic diagram used one as shown in figure 1, in this experiment
The individual weak resonator fabry-Perot type laser (WRC-FPLD) with tail optical fiber, its bias current and temperature are by a ultra-low noise
Controlled with the LD pulsed source (ILX-Lightwave, LDC-3724B) of high-temperature accuracy.Weak Resonant-cavity Method Fabry-Perot-type
Laser WRC-FPLD output first passes around an optical circulator (OC1), and it is two parts then to be divided by fiber coupler FC1,
A part is reflected after EDFA amplifies by tunable FBG, TFBG parameter be (tunable wavelength scope (1544.00nm~
1556.00nm three dB bandwidth:0.28nm) reflected light passes through Polarization Controller PC, adjustable attenuator VA, fiber coupler FC2 and
WRC-FPLD intracavitary is fed back to after OC1 again.The output of another part then enters detection system, and it includes a photodetector
(PD, U2T-XPDV3120R, 70GHz bandwidth), one electricity spectrum analyzer (ESA,FSW, 67GHz dk) and a spectrum
Analyzer (OSA, Ando AQ6317C).Polarization Controller PC is used for the polarization state for controlling feedback light, and variable attenuator VA is used for
The feedback power of feedback light is adjusted, light power meter PM is used for the luminous power for detecting feedback light.The weak Resonant-cavity Method in whole experiment
Fabry-Perot-type laser WRC-FPLD temperature is fixed on 20.02 DEG C, and bias current I is fixed as 35mA.
Fig. 2 gives some fundamental characteristics of WRC-FPLD in free-running operation.It is the WRC- of record in Fig. 2 (a)
FPLD PI curves.The threshold current I of the WRC-FPLDthAbout 27.80mA.With bias current I increase, WRC-FPLD's
A kind of linearly increasing trend is presented in power output, and when bias current I is 35mA, now WRC-FPLD power output is
0.43mW.Fig. 2 (b) have recorded the spatial distribution situation under the electric current, be shown in wavelength 1510.00nm -1570.00nm this
In the range of 60nm, WRC-FPLD has gain, and contains more than 100 longitudinal modes, and their mode spacing is about
0.56nm.The wavelength of main lasing mould is 1540.09nm, and energy is -14.26dBm.Because FBG tunable range is
1544.00nm~1556.00nm, thus main detection should in the range of WRC-FPLD longitudinal mode TFBG feedback under Nonlinear Dynamic
Mechanical characteristic.
The influence of chaotic signal bandwidth is exported to illustrate FBG external cavity feedbacks structure to WRC-FPLD longitudinal modes.It is adjustable to FBG
The bandwidth of WRC-FPLD each longitudinal mode output chaotic signal is studied respectively in humorous scope.Fig. 3 is given in the range of this
The spectrum of each longitudinal modes of WRC-FPLD, the maximum chaos bandwidth that each longitudinal mode can reach and institute when reaching maximum chaos bandwidth are right
The feedback power answered.As illustrated, in Fig. 3 (a), when WRC-FPLD free-running operations, in FBG tunable range
In 1544.00nm to 1556.00nm, 20 WRC-FPLD longitudinal mode is contained.Their energy is not quite similar, because
Gain of the WRC-FPLD cavity body structure factor and intracavitary to each pattern has differences.In Fig. 3 (b), it is observed that the tune
The chaos bandwidth of all WRC-FPLD longitudinal modes outputs can reach 30GHz levels in humorous scope.But can be with Fig. 3 (c)
It was found that for different WRC-FPLD longitudinal mode, the required feedback power when their output reaches maximum chaos bandwidth
Differ.This is due to caused by the gain difference of different mode.Therefore, to realize that each pattern reaches maximum chaos band
Width output is, it is necessary to more accurately control feedback power.
Experiment confirms the exocoel by the use of tunable FBG as WRC-FPLD, can produce chaos bandwidth and be up to about 30GHz
And the Chaotic Wideband Signal that centre wavelength is tunable.As a result show, pass through the suitable feedback of centre wavelength and selection for adjusting FBG
Power, up to 20 FBG exocoels WRC-FPLD longitudinal mode can respectively enter chaos state, and bandwidth reaches 30GHz.Although
FBG tunable range only has about 10nm, if but by experimental result above it is contemplated that using tunable range more
Exocoels of the big FBG as WRC-FPLD, more WRC-FPLD longitudinal mode can be made to enter chaos state, and make chaotic signal
Centre wavelength can be adjusted in bigger tuning range.It is desirable that the work can be to multichannel high rate optical chaotic secret
The perfect offer help of communication system.
Described above is only preferred embodiment of the present utility model, is not limited to the utility model, it is noted that
For those skilled in the art, on the premise of the utility model technical principle is not departed from, can also do
Go out some improvement and modification, these improvement and modification also should be regarded as the scope of protection of the utility model.
Claims (4)
1. the Chaotic Wideband Signal generating means that a kind of centre wavelength is tunable, it is characterised in that utilize Fiber Bragg Grating FBG
As the exocoel of weak resonator fabry-Perot type laser, to produce the tunable broadband light chaotic signal of centre wavelength；
Weak resonator fabry-Perot type laser WRC-FPLD output first passes around a first optical circulator OC1, input the
One fiber coupler FC1, then by tunable fiber Bragg grating TFBG after ginseng erbium erbium-doped optical fiber amplifier EDFA amplification
Reflection, reflected light pass through Polarization Controller PC, adjustable attenuator VA, the second fiber coupler FC2 and the first optical circulator successively
Weak resonator fabry-Perot type laser WRC-FPLD intracavitary is fed back to after OC1 again；
Wherein, weak resonator fabry-Perot type laser WRC-FPLD bias current and temperature are by a ultra-low noise and height
The LD pulsed source of temperature accuracy is controlled.
2. the Chaotic Wideband Signal generating means that centre wavelength according to claim 1 is tunable, it is characterised in that weak humorous
The chamber fabry-Perot type laser WRC-FPLD temperature of shaking is fixed on 20.02 DEG C, and bias current I is fixed as 35mA.
3. the Chaotic Wideband Signal generating means that centre wavelength according to claim 1 is tunable, it is characterised in that adjustable
Humorous Fiber Bragg Grating FBG TFBG parameter：Tunable wavelength scope 1544.00nm~1556.00nm, three dB bandwidth:0.28nm.
4. the Chaotic Wideband Signal generating means that centre wavelength according to claim 1 is tunable, it is characterised in that also wrap
It is two parts to include the light that the first optical circulator OC1 is exported by the first fiber coupler FC1 to divide, and a part is through joining erbium Er-doped fiber
To be reflected after amplifier EDFA amplifications by tunable fiber Bragg grating TFBG, the output of another part then enters detection system,
The detection system includes a photoelectric detector PD, an electricity spectrum analyzer and a spectroanalysis instrument, Polarization Controller PC
For controlling the polarization state of feedback light, variable attenuator VA is used for the feedback power for adjusting feedback light, and light power meter PM is used to examine
Survey the luminous power of feedback light.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086904A (en) * | 2017-05-23 | 2017-08-22 | 西南大学 | The Chaotic Wideband Signal generating means that centre wavelength is tunable |
| CN110098555A (en) * | 2019-04-26 | 2019-08-06 | 太原理工大学 | Ultra wide band white noise sound source based on the chaos laser parallel connection of multichannel multimode |
| CN111900604A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | Hectowatt chaotic laser source device based on random fiber laser |
| CN111900603A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | Chaotic laser light source device capable of realizing hectowatt chaotic laser output |
| CN111900601A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | High-power tunable chaotic laser light source device |
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2017
- 2017-05-23 CN CN201720578585.4U patent/CN206993129U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086904A (en) * | 2017-05-23 | 2017-08-22 | 西南大学 | The Chaotic Wideband Signal generating means that centre wavelength is tunable |
| CN107086904B (en) * | 2017-05-23 | 2023-05-23 | 西南大学 | Broadband chaotic signal generating device with tunable center wavelength |
| CN110098555A (en) * | 2019-04-26 | 2019-08-06 | 太原理工大学 | Ultra wide band white noise sound source based on the chaos laser parallel connection of multichannel multimode |
| CN111900604A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | Hectowatt chaotic laser source device based on random fiber laser |
| CN111900603A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | Chaotic laser light source device capable of realizing hectowatt chaotic laser output |
| CN111900601A (en) * | 2020-07-15 | 2020-11-06 | 太原理工大学 | High-power tunable chaotic laser light source device |
| CN111900604B (en) * | 2020-07-15 | 2021-07-27 | 太原理工大学 | Hectowatt chaotic laser source device based on random fiber laser |
| CN111900601B (en) * | 2020-07-15 | 2021-07-27 | 太原理工大学 | High-power tunable chaotic laser light source device |
| CN111900603B (en) * | 2020-07-15 | 2021-07-27 | 太原理工大学 | Chaotic laser light source device capable of realizing hectowatt chaotic laser output |
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