CN106773449A - A kind of full light quantization device and method of high accuracy based on two-way expansible multistage cascade spectrum pressure texture - Google Patents
A kind of full light quantization device and method of high accuracy based on two-way expansible multistage cascade spectrum pressure texture Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3515—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3511—Self-focusing or self-trapping of light; Light-induced birefringence; Induced optical Kerr-effect
- G02F1/3513—Soliton propagation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
- G02F2/004—Transferring the modulation of modulated light, i.e. transferring the information from one optical carrier of a first wavelength to a second optical carrier of a second wavelength, e.g. all-optical wavelength converter
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F7/00—Optical analogue/digital converters
Abstract
The present invention relates to field of photoelectric technology, a kind of full light quantization device and method of high accuracy based on two-way expansible multistage cascade spectrum pressure texture specifically related in based on the full light quantization system of soliton self-frequency sh effect, effectively solves the problems, such as that full light quantization process number of significant digit is not high.The present invention is comprised the following steps that：（1）There is red shift in the ultra-short optical pulse spectrum for making input by soliton self-frequency sh effect, complete " intensity → wavelength " mapping；（2）By bidirectional three-step spectrum compression section, the collective effect of the unusual GVD of recycling and Self-phase modulation realizes efficient spectrum compression, so as to realize high accuracy light quantization for light pulse after self-frequency shift.The present invention makes the ultrashort light pulse of input that self-frequency shift occur and the light pulse after self-frequency shift is compressed using two-way three class connection spectrum pressure texture, simplifies system and device, reduces hardware cost, and with stronger scalability.
Description
Technical field
The present invention relates to field of photoelectric technology, and in particular in based on the full light quantization system of soliton self-frequency sh effect one
Plant the full light quantization device and method of high accuracy based on two-way expansible multistage cascade spectrum pressure texture.
Background technology
Analog-digital converter（ADC, Analog-to-digital converter）For by continuous analog signal be converted into from
Data signal is dissipated, is the Primary Component in information processing system, in high speed wide-band communication system, Radar Signal Processing, signal prison
There is important application in the field such as survey and treatment.According to realization mechanism, ADC points is following three class：Superconductor ADC, electronics ADC
With optics ADC.Superconductor ADC is limited by material property be must operate under ultra-low temperature surroundings, and this constrains its application significantly
Scope.Electronics ADC is most widely used at present, but because carrier mobility speed has physics limit, its bandwidth and speed
It is limited, and due to being limited by factors such as sampling time shake, comparator uncertainties, usual sampling rate is often carried
Double, number of significant digit declines one（R. H. Walden, Analog-to-digital converter survey and
analysis, IEEE. J. Select. Areas Commun., Vol. 17, 1999:539-550）, therefore, electronics
ADC is difficult in bandwidth 10GHz high quantization precision achieved above all the time.For example, the electronics ADC of most high speed is the U.S. at present
The 16GHz bandwidth ADC of Tektronix, and Japan Fujitsu 15GHz bandwidth ADC, but their number of significant digit is below 6
Position.
With the development of mode-locked laser technology, the research of optics ADC is continued to bring out.At present, mode-locked laser can be produced
The high stability light pulse sequence of more than repetition rate 10GHz, time jitter generally in 10fs magnitudes, tremble by the time than electric pulse
It is dynamic（0.5ps-2ps）It is more than low 2 orders of magnitude, therefore, electric pulse is substantially better than as sampling pulse using light pulse, its basic original
Because being：Interval for high-speed sampling, the noise that sampling time shake is introduced is to cause the reduction of ADC signal to noise ratios（Effective quantization
Number is reduced）Leading factor, effective quantified precision when the theoretical limit of optics ADC is sampling rate 10GS/s>10bits, this refers to
Mark is far above electronics ADC.Simultaneously as optical bandwidth is huge, the ultrashort light pulse width of mode-locked laser output can be as little as
Sub- ps magnitudes, the ultrashort light pulse sequence that repetition rate is up to hundreds of GHz can be obtained by time division multiplex and wavelength-division multiplex technique
Row, and electrooptic modulator electricity bandwidth up to tens of more than GHz, thus be expected to make optics ADC to obtain more than 100GS/s's
The analog bandwidth of sampling rate and up to tens of GHz（G. C. Valley, Photonic analog-to-digital
converters, Opt. Express, 2007, 15(5): 1955-1982）.For studying more optics ADC at present,
According to the function that optical technology is completed wherein, following two major class is broadly divided into：Optics auxiliary type ADC, full light ADC.Wherein,
Full light ADC completes the sampling and quantization of signal in area of light simultaneously, has given full play to optical technology ultra wide band, ultrahigh speed, high stable
The features such as spending, it is considered to be future is expected to break through one of ADC bandwidth, speed and the limit of accuracy most potential technology.
In full light ADC, light quantization is a very the key link, is also the guarantee of signal precise digitization.At present
Most concerned by the industry is based on soliton self-frequency sh effect（SSFS, Soliton self-frequency shift）Light quantization
Technology, 2002, T. Konishi of Osaka, Japan university et al. were using ultrashort light pulse in highly nonlinear optical fiber（HNLF,
highly nonlinear fiber）In SSFS effects realize light quantization（T. Konishi, K. Tanimura, K.
Asano, et al., All-optical analog-to-digital converter by use of self-
frequency shifting in fiber and a pulse-shaping technique. J. Opt. Soc. Am.
B, 2002, 19(11):2817-2823）, its physical essence is：Ultrashort light pulse（Subpicosecond magnitude pulsewidth）Spectrum width it is very wide,
When being transmitted in the highly nonlinear optical fiber of anomalous dispersion, the high fdrequency component of pulse frequency spectrum can be as pump light, by Raman gain
Effectively amplify the low frequency component in same pulse.This process is carried out with pulse is transmitting continuous in a fiber, causes energy continuous
Ground is transferred to low frequency component from high fdrequency component, shows as the overall red shift of orphan's frequency spectrum.For the optical fiber of regular length, orphan's
Self-frequency shift amount is proportional to the intensity of input optical pulse, therefore, light quantization maps to realize by " intensity → wavelength ".
Light quantization precision based on SSFS is proportional to the ratio of self-frequency shift amount and frequency displacement afterpulse spectrum width, and under normal circumstances
Pulse spectrum width after SSFS is larger.Therefore, when self-frequency shift amount is limited, spectrum compression is the effective technology hand for improving quantified precision
Section.Spectrum compression generally utilizes Self-phase modulation（SPM, self-phase modulation）The positive chirp compensation for introducing is unusual
GVD（GVD, group-velocity dispersion）The negative chirp for introducing is realized., T. Konishi in 2008
Et al. after SSFS utilize single-mode fiber（SMF, single-mode fiber）Cascade H NLF realizes that spectrum compresses, and makes quantization essence
Degree reaches 4bits（T. Nishitani, T. Konishi, K. Itoh., Resolution Improvement of
All-Optical Analog-to-Digital Conversion Employing Self-frequency Shift and
Self-Phase-Modulation-Induced Spectral Compression. IEEE J. Sel. Top. Quan.
Electron., 2008, 14(3):724-732.）.But the spectrum compression ratio that one-level SMF+HNLF structures are obtained（CR,
compression ratio）It is limited, in order to obtain quantified precision higher, it is necessary to be realized by multistage SMF+HNLF structures high
CR.The group in 2013 realizes that the spectrum after SSFS compresses further through level Four SMF+HNLF structures, obtains 6bits and quantifies essence
Degree（K. Takahashi, H. Matsui, T. Nagashima, T. Konishi, Resolution upgrade
towards 6-bit optical quantization using power-to-wavelength conversion for
photonic analog-to-digital conversion. Opt. Lett., 2013, 38(22):4864-4867）, but
It is that five sections of highly nonlinear optical fibers and four section single-mould fibers have been used in testing, system architecture is complicated, and insertion loss is larger, and firmly
Part is relatively costly.
The content of the invention
The present invention regarding to the issue above, proposes that the one kind in based on the full light quantization system of soliton self-frequency sh effect is based on double
To the full light quantization device and method of high accuracy of expansible multistage cascade spectrum pressure texture.
A kind of full light quantization device of high accuracy based on two-way expansible multistage cascade spectrum pressure texture, including the first light
Circulator, the first highly nonlinear optical fiber, the first single-mode fiber, the second highly nonlinear optical fiber, the second optical circulator, Er-doped fiber are put
Big device, the second single-mode fiber.
The connected mode of described device is：The a ports of the first optical circulator as light quantization device input port；First
The b ports of optical circulator connect the first highly nonlinear optical fiber, the first single-mode fiber, the second highly nonlinear optical fiber and second ring of light successively
The e ports of row device；The f ports of the second optical circulator are by being sequentially connected erbium-doped fiber amplifier, the second single-mode fiber and second
The d ports of optical circulator constitute the loop with reflection function；The c ports of the first optical circulator as light quantization device output
Port.
Technical scheme：A kind of full light quantity of high accuracy based on two-way expansible multistage cascade spectrum pressure texture
Change method is comprised the following steps：
（1）There is red shift in the ultra-short optical pulse spectrum for making input by SSFS, complete " intensity-wavelength " mapping；
（2）By catoptric arrangement, the collective effect of recycling abnormality GVD and SPM realizes three-level light for light pulse after self-frequency shift
Spectrum compression, so as to realize high accuracy light quantization.
Step（1）Specific method be：
Light pulse after sampling has identical centre wavelength and different peak powers, and a ports from the first optical circulator are defeated
Enter, exported by b ports, forward direction enters in the first highly nonlinear optical fiber to be transmitted.Due to SSFS, the light pulse of different peak powers its
Spectral red shift amount is different, completes " intensity-wavelength " mapping.
Step（2）Specific method be：
By step（1）Light pulse after the self-frequency shift for obtaining is positive by the first single-mode fiber, by the negative chirp of unusual GVD introducings,
Then positive to introduce positive chirp by SPM by the second highly nonlinear optical fiber, two chirps mutually compensate for offsetting, and realize first order light
Spectrum compression；Light pulse after primary spectrum compression is single by the second optical circulator, erbium-doped fiber amplifier and second by one
The loop of mode fiber composition realizes reflection, introduces negative chirp, and carries out chirp compensation reverses through the second highly nonlinear optical fiber, real
Existing secondary spectrum compression；Light pulse after secondary spectrum compression is successively back through the first single-mode fiber and the first non-thread high
Property optical fiber, realize third level spectrum compress.
Beneficial effects of the present invention are：
（1）Light pulse after catoptric arrangement makes self-frequency shift is two-way by single-mode fiber and highly nonlinear optical fiber, recycling
The collective effect of unusual GVD and SPM realizes efficient spectrum compression, improves quantified precision；
（2）, it is necessary to three sections of single-mode optics in the light quantization structure that tradition is compressed based on soliton self-frequency sh effect and unidirectional three-level spectrum
Fine and four sections of highly nonlinear optical fibers, compare it can be found that realizing identical light quantization effect, the present invention uses two-way cascade structure
Only with two section single-mould fibers and two sections of highly nonlinear optical fibers, system and device is simplified, reduce hardware cost；
（3）Two-way cascade structure of the invention can also enter one by between the second highly nonlinear optical fiber and the second optical circulator
Step more multistage " single-mode fiber+highly nonlinear optical fiber " of concatenation realizes the spectrum compression of Pyatyi, seven grades or even higher level, further
Quantified precision is improved, therefore, system has stronger scalability.
Brief description of the drawings
Fig. 1 is a kind of structure of the full light quantization device of high accuracy based on two-way expansible multistage cascade spectrum pressure texture
Schematic diagram.
Fig. 2 is the normalized intensity caused by unusual GVD without chirp hyperbolic secant pulse（a）And frequency chirp（b）Show
It is intended to.
Fig. 3 is the nonlinear phase shift caused by SPM without chirp hyperbolic secant pulse（Solid line）And frequency chirp（Dotted line）Show
It is intended to.
Fig. 4 is a kind of output of the full light quantization device of high accuracy based on two-way expansible multistage cascade spectrum pressure texture
Design sketch.
Fig. 5 is a kind of input of the full light quantization device of high accuracy based on two-way expansible multistage cascade spectrum pressure texture
Pulse peak power and self-frequency shift magnitude relation figure.
Fig. 6 is a kind of based on two-way expansible multistage cascade spectrum pressure texture when being input pulse peak power 49.8W
The full light quantization device of the high accuracy light quantization structure compressed based on soliton self-frequency sh effect and first-order spectrum through-type with tradition
Output effect comparison diagram.
Fig. 7 is the through-type light quantization structural representation compressed based on soliton self-frequency sh effect and first-order spectrum of tradition.
Fig. 8 is the analogous diagram of the through-type light quantization structure compressed based on soliton self-frequency sh effect and first-order spectrum of tradition.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings
As shown in figure 1, a kind of full light quantization device of high accuracy based on two-way expansible multistage cascade spectrum pressure texture, including
First optical circulator 1, the first highly nonlinear optical fiber 2, the first single-mode fiber 3, the second highly nonlinear optical fiber 4, the second optical circulator
5th, erbium-doped fiber amplifier 6, the second single-mode fiber 7.
The connected mode of described device is：The a ports of the first optical circulator 1 as light quantization device input port；The
The b ports of one optical circulator 1 connect the first highly nonlinear optical fiber 2, the first single-mode fiber 3, the second highly nonlinear optical fiber 4 and successively
The e ports of two optical circulators 5；The f ports of the second optical circulator 5 are by being sequentially connected erbium-doped fiber amplifier 6, the second single-mode optics
The d ports of the optical circulator 5 of fibre 7 and second constitute the loop with reflection function；The c ports of the first optical circulator 1 are used as light quantity
The output port that makeup is put.
Device of the present invention can be divided into two parts by its function：Part I is SSFS parts, including the first non-thread high
Property optical fiber 2, its function is the SSFS using ultrashort pulse, realizes " intensity-wavelength " mapping；Part II is bidirectional three-step spectrum
Compression section, including the first single-mode fiber 3, the second highly nonlinear optical fiber 4, the second optical circulator 5, erbium-doped fiber amplifier 6,
Two single-mode fibers 7 and the first highly nonlinear optical fiber 2, its function are spectrum width of the compression from shift frequency afterpulse, improve system quantifies essence
Degree.
A kind of full light quantization method of high accuracy based on two-way expansible multistage cascade spectrum pressure texture includes following step
Suddenly：
（1）In the Part I of described device, SSFS makes the ultra-short optical pulse spectrum of input that red shift to occur, and completes " intensity-ripple
It is long " mapping；
In this step, the light pulse after sampling has identical centre wavelength, different peak powers, from the first optical circulator 1
A ports input, by its b port export, forward direction enter the first highly nonlinear optical fiber 2 in transmit.Due to SSFS, different its peak works
Its spectral red shift amount of the light pulse of rate is different, completes " intensity-wavelength " mapping, and ideally, the self-frequency shift amount of light pulse expires
Foot
（1）
Wherein,、 、 WithRespectively GVD coefficient, nonlinear factor, the Raman response of highly nonlinear optical fiber
Function single order time square and length,It is the peak power of input optical pulse.It can be seen that in highly nonlinear optical fiber lengthOne
In the case of fixed, self-frequency shift amount is linear with the peak power of input pulse.
（2）By bidirectional three-step spectrum compression section, recycling abnormality GVD's and SPM is total to for light pulse after self-frequency shift
Same-action realizes efficient three-level spectrum compression, so as to realize high accuracy light quantization.
Spectrum compression is produced by SPM by preset negative chirped pulse in the present invention.Its principle is that pulse is first passed through
Unusual GVD introduces linear negative chirp, then introduces non-linear positive chirp by SPM, and positive chirp is near pulse center wavelength
Linear, two chirps mutually compensate for offsetting, and complete spectrum compression.
When without initial chirp light pulse by length for z anomalous dispersion single-mode fiber when, due to unusual GVD, export arteries and veins
The frequency domain of punching is
（2）
Wherein,、It is respectively the GVD coefficient and fiber lengths of pulse frequency, single-mode fiber with z.It can be seen that
Unusual GVD changes the phase of each spectrum component of pulse, but this phase place change does not interfere with pulse frequency spectrum, can but change arteries and veins
Rush shape.Fig. 2（a）By drawing=2, when 4Curve, indicates by the hyperbolic secant pulse of dispersion sensing
Broadening degree, wherein z are fiber lengths,It is dispersion length,It is pulse normalized intensity；Fig. 2（b）Show group velocity
The frequency chirp that degree dispersion puts on hyperbolic secant pulse is negative, and linear change.
When anomalous dispersion highly nonlinear optical fiber is entered without initial chirp light pulse, due to SPM, the frequency spectrum for exporting pulse becomes
Change is
（3）
Wherein、WithIt is respectively nonlinear phase shift, optical fiber effective length and non-linear length.It can be seen that being felt by SPM
The frequency chirp answered increases with the increase of transmission range, i.e., when pulse is along Optical Fiber Transmission, new frequency component is in not stopping pregnancy
It is raw.Fig. 3 depicts the nonlinear phase shift of the hyperbolic secant pulse sensed by SPM（Solid line）And frequency chirp（Dotted line）, can see
Go out non-linear frequency chirp linear near pulse center and be positive.
In this step, by step（1）Light pulse after the self-frequency shift for obtaining is positive by the first single-mode fiber 3, by anti-
Normal GVD introduces negative chirp, and then forward direction introduces positive chirp by the second highly nonlinear optical fiber 4 by SPM, and two chirps are mutually compensated for
Offset, realize that primary spectrum compresses；Light pulse after primary spectrum compression is by one by the second optical circulator 5, er-doped
The loop of the composition of 6 and second single-mode fiber of fiber amplifier 7 realizes reflection, introduces negative chirp, and reverses through the second non-thread high
Property optical fiber 4, chirp compensation is carried out by SPM, realize secondary spectrum compress；Light pulse after secondary spectrum compression is anti-successively
To by the first single-mode fiber 3 and the first highly nonlinear optical fiber 2, realize third level spectrum compress.
Embodiment
In order to observe effectiveness of the invention, this example is emulated using Matlab.The hyperbolic secant pulse being input into emulation
Centre wavelength 1550.3nm, pulsewidth 360fs, the amplification coefficient of erbium-doped fiber amplifier 6 is 5 dB, the parameter such as table 1 of each optical fiber
It is shown.Fig. 4 gives the output spectrum under all power, and self-frequency shift 1570 ~ 1618nm of wave-length coverage, spectrum width is approximately
0.43nm, totally 67 states（Middle heart septum about 0.75nm）, correspondence quantization digit 6.07bits.Fig. 5 is input pulse its peak work
Rate and self-frequency shift magnitude relation figure, as can be seen from the figure approximately linear relation, it was demonstrated that the correctness of the principle of the invention.Fig. 6 gives
Compression effectiveness figure during input power 49.8W is gone out.
The optical fiber parameter of table 1
The through-type light quantization structure compressed based on soliton self-frequency sh effect and first-order spectrum of contrast tradition, as shown in fig. 7, the knot
It is made up of two parts in structure, Part I is SSFS parts, including the first highly nonlinear optical fiber 2, its function is using ultrashort arteries and veins
The SSFS of punching, realizes " intensity-wavelength " mapping；Part II is unidirectional first-order spectrum compression section, including the first single-mode fiber 3
With the second highly nonlinear optical fiber 4, its function is spectrum width of the compression from shift frequency afterpulse.When Fig. 6 gives input power 49.8W
Compression effectiveness figure.Fig. 8 gives tradition the through-type output spectrum based on soliton self-frequency sh effect and first-order spectrum pressure texture,
As can be seen that the spectrum width in phase co-wavelength self-frequency shift wave-length coverage is approximately 1.3nm, totally 34 states（Middle heart septum is about
1.45nm）, correspondence quantization digit 5.09bits.
By contrasting two kinds of spectrum compression effectiveness（As shown in Figure 6）, it can be seen that using spectrum width after spectrum of the present invention compression
/ 3rd of about traditional through-type light quantization structure compressed based on soliton self-frequency sh effect and first-order spectrum, quantization digit
One is improved, the effective accuracy of whole quantization system is greatly improved.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such especially statement and embodiment.This area
Those of ordinary skill can according to these technical inspirations disclosed by the invention make it is various do not depart from essence of the invention other are each
Plant specific deformation and combine, these deformations and combination are still within the scope of the present invention.
Claims (4)
1. a kind of full light quantization device of high accuracy based on two-way expansible multistage cascade spectrum pressure texture, including first ring of light
Row device（1）, the first highly nonlinear optical fiber（2）, the first single-mode fiber（3）, the second highly nonlinear optical fiber（4）, the second optical circulator
（5）, erbium-doped fiber amplifier（6）With the second single-mode fiber（7）.
2. according to claim 1 a kind of based on the two-way expansible multistage full light quantity of high accuracy for cascading spectrum pressure texture
Makeup is put, it is characterised in that first optical circulator（1）A ports as light quantization device input port；First ring of light
Shape device（1）B ports connect the first highly nonlinear optical fiber successively（2）, the first single-mode fiber（3）, the second highly nonlinear optical fiber（4）、
Optical circulator（5）E ports；Optical circulator（5）F, d port pass through erbium-doped fiber amplifier（6）With the second single-mode fiber（7）
Connect and compose loop；First optical circulator（1）C ports as light quantization device output port.
3. a kind of based on the two-way expansible multistage full light quantization method of high accuracy for cascading spectrum pressure texture, it is characterised in that
Comprise the following steps：
（i）Input optical pulse is from optical circulator（1）A ports input, exported by b ports, forward direction enter the first high non-linearity light
It is fine（2）, cause that the spectrum of light pulse occurs red shift, completion " intensity → wavelength " mapping by soliton self-frequency sh effect；
（ii）Light pulse after self-frequency shift by catoptric arrangement, the unusual GVD of recycling and Self-phase modulation it is common
Efficient three-level spectrum compression is realized in effect, so as to realize high accuracy light quantization.
4. according to claim 3 a kind of based on the two-way expansible multistage full light quantity of high accuracy for cascading spectrum pressure texture
Change installation method, it is characterised in that affiliated step（ii）Three-level spectrum compression method be,
By step（i）Light pulse after the self-frequency shift for obtaining is positive by the first single-mode fiber（3）, by unusual GVD
Effect introduces negative chirp, and then forward direction is by the second highly nonlinear optical fiber（4）, positive chirp, two are introduced by self phase modulation
Chirp mutually compensates for offsetting, and realizes that primary spectrum compresses；Light pulse after primary spectrum compression is by one by the second light
Circulator（5）, erbium-doped fiber amplifier（6）With the second single-mode fiber（7）The loop of composition realizes reflection, introduces negative chirp, and
Reverses through the second highly nonlinear optical fiber（4）, chirp compensation is carried out by self phase modulation, realize secondary spectrum pressure
Contracting；Light pulse after secondary spectrum compression is successively back through the first single-mode fiber（3）With the first highly nonlinear optical fiber（2）,
Realize that third level spectrum compresses.
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| CN108646501A (en) * | 2018-04-17 | 2018-10-12 | 西安空间无线电技术研究所 | It is a kind of that realization device is quantified based on the bi-directional optical of highly nonlinear optical fiber and Sagnac rings |
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| KOJI TAKAHASHI 等: "Resolution upgrade toward 6-bit optical quantization using power-to-wavelength conversion for photonic analog-to-digital conversion", 《OPTICS LETTERS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108398695A (en) * | 2018-01-15 | 2018-08-14 | 北京航空航天大学 | A kind of EO-1 hyperion laser radar system based on receiving terminal fibre-optical dispersion |
| CN108398695B (en) * | 2018-01-15 | 2020-10-02 | 北京航空航天大学 | Hyperspectral laser radar system based on receiving end optical fiber dispersion |
| CN108646501A (en) * | 2018-04-17 | 2018-10-12 | 西安空间无线电技术研究所 | It is a kind of that realization device is quantified based on the bi-directional optical of highly nonlinear optical fiber and Sagnac rings |
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