CN103780307B - A kind of system and method that produces Optical Sampling pulse train - Google Patents
A kind of system and method that produces Optical Sampling pulse train Download PDFInfo
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- CN103780307B CN103780307B CN201210402335.7A CN201210402335A CN103780307B CN 103780307 B CN103780307 B CN 103780307B CN 201210402335 A CN201210402335 A CN 201210402335A CN 103780307 B CN103780307 B CN 103780307B
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- frequency comb
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Abstract
The invention provides a kind of system and method that produces Optical Sampling pulse train, comprise the following steps: the light that the light source of S1, multiple different wave lengths produces is coupled as light beam through wavelength division multiplexer; Intensity modulator and the phase-modulator of S2, the cascade of described light beam process, and on frequency domain, produce multiple frequency comb; S3, described multiple frequency comb are carried out to quadratic phase compensation; S4, to the linear phase through the additional Different Slope of described multiple frequency comb of quadratic phase compensation in step S3, obtain light pulse sequence; The present invention carries out quadratic phase compensation by the frequency comb to different, and additional specific linear phase shift, not only can regulate the repetition rate of light pulse, can also accurately control the time interval between different wave length light pulse, realize different wave length pulse in time uniformly-spaced, thereby contribute to the calibration between each wavelength channel in Optical Sampling ADC system, improve the performance of whole ADC system.
Description
Technical field
The present invention relates to photoelectron technology and technical field of optical fiber communication, particularly a kind of generationThe system and method for Optical Sampling pulse train.
Background technology
Photon sampling analog-to-digital conversion (ADC) system based on time-division and wavelength-division multiplex technique due toTwo-forty, low jitter and the rear end wavelength-division Techniques For Reducing that its sampling pulse has to electric ADCThe demand of bandwidth, makes it be widely applied in photon sampling field; Based on time and rippleIn the Optical Sampling A/D conversion system of point multiplex technique, most important feature is exactly that its sampling pulse isBy the pulse of different wave length in time interleaver form, up to the present produce thisOn time and wavelength, the method for multiplexing pulse has two kinds: (1) based on wide range mode-locked laser,Utilize wavelength division component and optical delay line to produce the light pulse of time-division and wavelength-division multiplex; (2) based on manyIndividual continuous light laser instrument utilizes dispersion interaction to realize compression and the time delay of paired pulses simultaneously, formsThe light pulse of time-division and wavelength-division multiplex.
Above-mentioned first method is limited to speed and the bandwidth of mode-locked laser, produce at a high speedLight pulse meeting makes systematic comparison complexity; Described second method, pulse compression and time delay be bySame Dispersive Devices is realized simultaneously, and the pulse that dispersion values will make different wave length in timeBe equally spaced, may not can to make pulse compression arrive enough narrow for this dispersion values, thereby cause phaseAdjacent pulse overlapping, the interweave quality of light pulse of the last time wavelength-division producing of impact; Through undueAnalyse, the common deficiency of this two schemes be exactly relative time delay between its different wave length pulse be notCan accurately control, this,, by bringing difficulty to sampling parallel processing afterwards, finally affects wholeThe number of significant digit of individual A/D conversion system.
Based on this, prior art truly has necessity of improvement.
Summary of the invention
The deficiency existing for prior art, the present invention proposes a kind of Optical Sampling pulse order that producesThe system and method for row, can accurately control the time interval between different wave length light pulse,And be achieved by the following technical programs:
A method that produces Optical Sampling pulse train, comprises the following steps:
The light that the light source of S1, multiple different wave lengths produces is coupled as light beam through wavelength division multiplexer;
Intensity modulator and the phase-modulator of S2, the cascade of described light beam process, and at frequency domainThe multiple frequency comb of upper generation;
S3, described multiple frequency comb are carried out to quadratic phase compensation;
S4, additional tiltedly different to the described multiple frequency comb through quadratic phase compensation in step S3The linear phase of rate, obtains light pulse sequence.
Slope the prolonging corresponding to each wavelength pulse in time domain of the additional linear phase of described step S4Time, the time delay equal difference of this each wavelength pulse increases progressively.
Described intensity modulator and phase-modulator drive by the microwave signal of 10GHz.
Described step S2 further comprises that the phase shift of microwave signal to driving intensity modulator carries outControl.
Described step S2 further comprises that the power of the microwave signal to driving phase-modulator carries outAmplify.
Described step S2 further comprises and utilizes Polarization Controller to control polarisation of light state.
Before described step S3 carries out, described multiple frequency comb are through EDFA Erbium-Doped Fiber Amplifier.
Described light source is continuous light laser instrument.
A system that produces Optical Sampling pulse train, includes:
For generation of multiple light sources of different wave length; For the optocoupler of many different wave lengths is combined intoThe wavelength division multiplexer of light beam;
Intensity modulator and phase-modulator, for modulating described light beam, to produceFrequency comb;
The microwave signal source of 10GHz, for driving intensity modulator and phase-modulator;
Phase Processing unit, for carrying out Phase Processing to the frequency comb producing;
Oscillograph and autocorrelation function analyzer, for showing Optical Sampling pulse train and the arteries and veins thereof of final generationRush width.
Described system further comprises:
Biasing circuit, for generation of bias voltage, controls intensity modulator at linear modulator zone;
Phase-shifter, for controlling the phase shift of microwave signal source of 10GHz;
Power amplifier, amplifies for the power of the microwave signal source to 10GHz;
Polarization Controller, for controlling polarisation of light state;
EDFA Erbium-Doped Fiber Amplifier, for the loss of compensating light.
The present invention is the time wavelength that produces high repetition frequency based on frequency comb Phase Processing technologyThe Optical Sampling pulse train that interweaves, carries out quadratic phase compensation by the frequency comb to different, and attachedAdd specific linear phase shift, not only can regulate the repetition rate of light pulse, can also be to differenceThe time interval between wavelength light pulse is accurately controlled, and realizes different wave length pulse in the timeOn uniformly-spaced, thereby contribute to the calibration between each wavelength channel in Optical Sampling ADC system, carryThe performance of high whole ADC system.
Brief description of the drawings
Fig. 1 is flow chart of the present invention;
Fig. 2 is principle schematic of the present invention;
Fig. 3 is system and device figure of the present invention.
Detailed description of the invention
Under regard to a kind of system and side that produces Optical Sampling pulse train proposed by the inventionMethod, describes in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1:
The present embodiment provides a kind of method that produces Optical Sampling pulse train, comprises the following steps:
The light that the light source of S1, multiple different wave lengths produces is coupled as light beam through wavelength division multiplexer;
Intensity modulator and the phase-modulator of S2, the cascade of described light beam process, and at frequency domainThe multiple frequency comb of upper generation;
S3, described multiple frequency comb are carried out to quadratic phase compensation;
S4, additional tiltedly different to the described multiple frequency comb through quadratic phase compensation in step S3The linear phase of rate, obtains light pulse sequence.
Slope the prolonging corresponding to each wavelength pulse in time domain of the additional linear phase of described step S4Time, the time delay equal difference of this each wavelength pulse increases progressively.
Described intensity modulator and phase-modulator drive by the microwave signal of 10GHz.
Described step S2 further comprises that the phase shift of microwave signal to driving intensity modulator carries outControl.
Described step S2 further comprises that the power of the microwave signal to driving phase-modulator carries outAmplify.
Described step S2 further comprises and utilizes Polarization Controller to control polarisation of light state.
Before described step S3 carries out, described multiple frequency comb are through EDFA Erbium-Doped Fiber Amplifier.
Described light source is continuous light laser instrument.
The present embodiment also provides a kind of system that produces Optical Sampling pulse train, includes:
For generation of multiple light sources of different wave length; For the optocoupler of many different wave lengths is combined intoThe wavelength division multiplexer of light beam;
Intensity modulator and phase-modulator, for modulating described light beam, to produceFrequency comb;
The microwave signal source of 10GHz, for driving intensity modulator and phase-modulator;
Phase Processing unit, for carrying out Phase Processing to the frequency comb producing;
Oscillograph and autocorrelation function analyzer, for showing Optical Sampling pulse train and the arteries and veins thereof of final generationRush width.
Described system further comprises:
Biasing circuit, for generation of bias voltage, controls intensity modulator at linear modulator zone;
Phase-shifter, for controlling the phase shift of microwave signal source of 10GHz;
Power amplifier, amplifies for the power of the microwave signal source to 10GHz;
Polarization Controller, for controlling polarisation of light state;
EDFA Erbium-Doped Fiber Amplifier, for the loss of compensating light.
Embodiment 2:
The present invention is further elaborated by reference to the accompanying drawings for the present embodiment, as shown in Figure 1, Figure 2, Fig. 3 instituteShow, wherein:
The light that the light source of S1, multiple different wave lengths produces is coupled as light beam through wavelength division multiplexer;The light that the continuous light laser instrument of N different wave length is produced is protected and is partially coupled as through wavelength division multiplexerLight beam; In this embodiment, N is 4, and wavelength is respectively λ 1, λ 2, λ 3, λ 4;
Intensity modulator and the phase-modulator of S2, the cascade of described light beam process, and at frequency domainThe multiple frequency comb of upper generation; As shown in Figure 3, this intensity modulator and this phase-modulator byThe microwave signal of 10GHz drives, and the biased electrical that this intensity modulator is produced by biasing circuit is voltage-controlledMake it at linear modulator zone, the phase place that this phase-modulator is introduced is the quadratic term of time,Linear chrip; The each spectral line frequency of described frequency comb interval equals to drive intensity modulator and phase place to adjustThe frequency f of the microwave source of device processed, as shown in Figure 2 (a) shows; In this embodiment, described four lightFrequently the spectral line of comb is spaced apart 10GHz, and corresponding in time domain is that dutycycle is 50% sinePulse, its three dB bandwidth can reach 120GHz;
S3, described multiple frequency comb are carried out to quadratic phase compensation; Utilize the phase place shown in Fig. 3Processing unit, adds the quadratic phase as shown in Fig. 2 (b) to described multiple frequency comb, to disappearWarble except phase-modulation is caused, thereby in time domain, realize the compression of paired pulses, different ripplesThe center of long pulse overlaps, and the repetition rate of this pulse is f;
S4, additional tiltedly different to the described multiple frequency comb through quadratic phase compensation in step S3The linear phase of rate, obtains light pulse sequence; According to the characteristic of Fourier transformation, time domain waveformTime delay and exist Linear Mapping relation between the phase shift of corresponding frequency spectrum, by paired pulses frequentlyThe accurate control of spectrum phase place realizes the time delay of time domain waveform; Therefore, give different frequency comb attachedAdd specific linear phase shift, as shown in Figure 2 (c), the slope of respectively organizing linear phase has represented notThe different delayed time of co-wavelength pulse, and the time delay of each wavelength pulse is that equal difference increases progressively, and makes eachWavelength pulse has uniformly-spaced 1/Nf in time; By the demonstration of oscillograph and autocorrelation function analyzer,Finally obtain time wavelength-interleaved Optical Sampling pulse as shown in Figure 2 (d) shows, this multi-Wavelength PulsesRepetition rate be Nf; In this embodiment, the repetition rate of this multi-Wavelength Pulses is 40GHz;
Embodiment 3:
The present embodiment is to be further improved on the basis of embodiment 2, in step S2, increasesBe used for controlling drive the phase shift of intensity modulator microwave signal phase-shifter, be used for controlling polarization statePolarization Controller, be used for amplifying the power amplifier that drives phase-modulator microwave signal power,Like this, make the frequency comb of generation more symmetrical about its centre wavelength, and bandwidth is wider, hasBe beneficial to pulse compression narrower; Before described step S3 carries out, make described multiple frequency comb processEDFA Erbium-Doped Fiber Amplifier, with the loss of compensating light.
As can be seen from the above embodiments, the present invention produces based on frequency comb Phase Processing technologyThe time wavelength-interleaved Optical Sampling pulse train of raw high repetition frequency, by the frequency comb to differentCarry out quadratic phase compensation, and additional specific linear phase shift, not only can regulate light pulseRepetition rate, can also accurately control the time interval between different wave length light pulse,Realize different wave length pulse in time uniformly-spaced, thereby contribute in Optical Sampling ADC system eachCalibration between wavelength channel, improves the performance of whole ADC system.
Above embodiment is only for the present invention is described, and limitation of the present invention is not relevantThe those of ordinary skill of technical field, without departing from the spirit and scope of the present invention,Can also make a variety of changes and modification, therefore all technical schemes that are equal to also belong to the present inventionCategory, scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. a method that produces Optical Sampling pulse train, is characterized in that, comprises the following steps:
The light that the light source of S1, multiple different wave lengths produces is coupled as light beam through wavelength division multiplexer;
Intensity modulator and the phase-modulator of S2, the cascade of described light beam process, and at frequency domainThe multiple frequency comb of upper generation;
S3, described multiple frequency comb are carried out to quadratic phase compensation;
S4, additional tiltedly different to the described multiple frequency comb through quadratic phase compensation in step S3The linear phase of rate, obtains light pulse sequence;
Intensity modulator and the phase-modulator of the cascade of described light beam process, and produce on frequency domainRaw multiple frequency comb, comprising:
Intensity modulator utilize biasing circuit produce bias voltage control himself in linear modulationDistrict, phase-modulator is introduced the quadratic term phase place of time;
Described multiple frequency comb are carried out to quadratic phase compensation, comprising:
Described multiple frequency comb are added to quadratic phase, and to eliminate, phase-modulation is caused warbles.
2. the method for claim 1, is characterized in that, described step S4 addsThe slope of linear phase is corresponding to the time delay of each wavelength pulse in time domain, the prolonging of this each wavelength pulseTime equal difference increase progressively.
3. the method for claim 1, is characterized in that, described intensity modulator and phasePosition modulator drives by the microwave signal of 10GHz.
4. method as claimed in claim 3, is characterized in that, described step S2 is furtherThe phase shift that comprises the microwave signal to driving intensity modulator is controlled.
5. method as claimed in claim 3, is characterized in that, described step S2 is furtherThe power that comprises the microwave signal to driving phase-modulator amplifies.
6. method as claimed in claim 3, is characterized in that, described step S2 is furtherComprise and utilize Polarization Controller to control polarisation of light state.
7. method as claimed in claim 3, is characterized in that, carries out at described step S3Before, described multiple frequency comb are through EDFA Erbium-Doped Fiber Amplifier.
8. the method for claim 1, is characterized in that, described light source is that continuous light swashsLight device.
9. a system that produces Optical Sampling pulse train, is characterized in that, includes:
For generation of multiple light sources of different wave length; For the optocoupler of many different wave lengths is combined intoThe wavelength division multiplexer of light beam;
Intensity modulator and phase-modulator, for modulating described light beam, to produceFrequency comb;
The microwave signal source of 10GHz, for driving intensity modulator and phase-modulator;
Phase Processing unit, for carrying out Phase Processing to the frequency comb producing;
Oscillograph and autocorrelation function analyzer, for showing Optical Sampling pulse train and the arteries and veins thereof of final generationRush width;
Described light source, wavelength division multiplexer, intensity modulator, phase-modulator and Phase Processing listUnit is connected successively;
Described oscillograph is connected with Phase Processing unit respectively with autocorrelation function analyzer;
Microwave signal is appended to intensity modulator and phase-modulator by described microwave signal source simultaneouslyOn;
Described intensity modulator specifically for utilize biasing circuit produce bias voltage control its fromIn linear modulation district;
Described phase-modulator is specifically for introducing the quadratic term phase place of time;
Described Phase Processing unit is specifically for described multiple frequency comb are added to quadratic phase, withEliminate that phase-modulation is caused warbles.
10. system as claimed in claim 9, is characterized in that, described system is further wrappedDraw together:
Biasing circuit, for generation of bias voltage, controls intensity modulator at linear modulator zone;
Phase-shifter, for controlling the phase shift of microwave signal source of 10GHz;
Power amplifier, amplifies for the power of the microwave signal source to 10GHz;
Polarization Controller, for controlling polarisation of light state;
EDFA Erbium-Doped Fiber Amplifier, for the loss of compensating light.
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| CN201210402335.7A CN103780307B (en) | 2012-10-19 | 2012-10-19 | A kind of system and method that produces Optical Sampling pulse train |
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| CN201210402335.7A CN103780307B (en) | 2012-10-19 | 2012-10-19 | A kind of system and method that produces Optical Sampling pulse train |
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| CN103780307B true CN103780307B (en) | 2016-05-18 |
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| CN109828421B (en) * | 2019-03-28 | 2021-12-10 | 杭州电子科技大学 | Photon analog-to-digital conversion method and system based on intensity adjustment and differential coding technology |
| CN110601766B (en) * | 2019-09-10 | 2020-11-13 | 武汉光迅科技股份有限公司 | Control method and optical fiber amplifier |
| CN111830489B (en) * | 2020-07-22 | 2023-03-24 | 浙江光珀智能科技有限公司 | Anti-interference method and system for multiple TOF cameras |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1202636A (en) * | 1997-06-12 | 1998-12-23 | 托马斯及贝茨国际股份有限公司 | Chirp-controlled optical modulator and method of controlling chirp in modulation of optical signal |
| CN101459315A (en) * | 2009-01-04 | 2009-06-17 | 中国人民解放军国防科学技术大学 | Pulse laser based on wavelength-division multiplex coherent synthesizing phase control |
| CN102393593A (en) * | 2011-06-30 | 2012-03-28 | 北京邮电大学 | Ultra-short pulse light source generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4893961B2 (en) * | 2007-09-04 | 2012-03-07 | 日本電気株式会社 | Optical transmitter and control method of composite modulator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202636A (en) * | 1997-06-12 | 1998-12-23 | 托马斯及贝茨国际股份有限公司 | Chirp-controlled optical modulator and method of controlling chirp in modulation of optical signal |
| CN101459315A (en) * | 2009-01-04 | 2009-06-17 | 中国人民解放军国防科学技术大学 | Pulse laser based on wavelength-division multiplex coherent synthesizing phase control |
| CN102393593A (en) * | 2011-06-30 | 2012-03-28 | 北京邮电大学 | Ultra-short pulse light source generating device |
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