CN201061080Y - Cascade type electroabsorption modulation laser - Google Patents
Cascade type electroabsorption modulation laser Download PDFInfo
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- CN201061080Y CN201061080Y CNU2007200321737U CN200720032173U CN201061080Y CN 201061080 Y CN201061080 Y CN 201061080Y CN U2007200321737 U CNU2007200321737 U CN U2007200321737U CN 200720032173 U CN200720032173 U CN 200720032173U CN 201061080 Y CN201061080 Y CN 201061080Y
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- electroabsorption modulator
- electroabsorption
- frequency signal
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- modulator
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Abstract
The utility model relates to a cascade connection electroabsorption modulated laser, which comprises an RF signal generator, a power divider, a first RF signal amplifier, a second RF signal amplifier, a first electroabsorption modulator, a second electroabsorption modulator, a first DC voltage source, and a continuously tunable laser; wherein, the first electroabsorption modulator is connected with the second electroabsorption modulator via a tunable optical delayer. The utility model has the advantage that: the technical problems existing in the electroabsorption modulated laser in the background art, such as the needs to increase bandwidth and the relevant costs if the repetition frequency of the output pulse sequence is to be improved by multiples, are effectively solved.
Description
Technical field
The utility model relates to laser, particularly a kind of tandem type Electroabsorption Modulated Laser.
Background technology
The ultrashort light pulse source is to realize one of ultrahigh speed, big capacity System of all Optical Communication and server parts, and it also has important use to be worth at aspects such as ultra-wideband-light signal sampling, optical storage, ultra high-speed optical submodule-number conversions.In actual applications, require the ultrashort light pulse source to have that volume is little, simple in structure, repetition rate is high, shake is low, versatility is good, cost is low and characteristics such as reliability height.During telecommunication is used, be implementation structure compactness, ultra high-speed optical transmitter and the array thereof that can produce in batches, also require the ultrashort light pulse source to have the advantages that to integrate with other optics.
Utilize electro-absorption modulation to link to each other to produce with adjustable continuous wave laser the ultrashort pulse sequence be a kind of simple, reliable, can highly integrated technology.This technology has two kinds of schemes to produce ultrashort pulse, a kind of is to adopt single electroabsorption modulator and continuous wave laser to link, control shape and the pulsewidth of exporting pulse by the power of control radiofrequency signal and the bias voltage of electroabsorption modulator, the advantage of this scheme be simple in structure, cost is lower, loss is lower, shortcoming is the pulse duration broad; Another kind method adopts two electroabsorption modulator cascades, on two rf signal lines that link, add simultaneously a high-precision electric delay line, be used for controlling the delay of two electroabsorption modulator switching times, reduce two electroabsorption modulators and open the window time-interleaving, can control the width that produces pulse, the advantage of this technology is to produce short pulse train, good stability, and shortcoming is that cost is higher, particularly the slow line costliness of the adjustable electric of high accuracy, high repetition frequency.The repetition rate that two kinds of common advantages of scheme of this technology are pulse train is consistent with the radio frequency signal frequency of external modulation, by change modulating frequency can be flexibly with communicate by letter in each rate-compatible, simultaneously the continuous light that links with electro-absorption modulation is if continuously adjustable, and Electroabsorption Modulated Laser can be realized the tunable wave length function.If but want to increase exponentially the repetition rate of output pulse sequence, the bandwidth of radio-frequency signal source, radio frequency amplifier, radiofrequency signal connector, adjustable electric delay line and modulator that we use also will increase thereupon, corresponding cost also will increase, particularly repetition rate has arrived more than the 20G, increase repetition rate exponentially, cost will increase several times, even tens times.
The utility model content
The utility model for solve that existing Electroabsorption Modulated Laser exists in the background technology want to increase exponentially the repetition rate of output pulse sequence the time, bandwidth will increase thereupon, and the technical problem that corresponding cost also will increase, and a kind of tandem type Electroabsorption Modulated Laser is provided.
Technical solution of the present utility model is: the utility model is a kind of tandem type Electroabsorption Modulated Laser, comprises radio-frequency signal generator, power splitter, first radio frequency signal amplifiers, second radio frequency signal amplifiers, first electroabsorption modulator, second electroabsorption modulator, first direct voltage source, second direct voltage source and a continuous tunable laser; Power splitter is connected the output of radio-frequency signal generator, first radio frequency signal amplifiers, first electroabsorption modulator, first direct voltage source are connected on the output of power splitter successively, second radio frequency signal amplifiers, second electroabsorption modulator, second direct voltage source are connected on another output of power splitter successively, tunable laser inserts first electroabsorption modulator continuously, first electroabsorption modulator inserts second electroabsorption modulator, and its special character is: described first electroabsorption modulator inserts second electroabsorption modulator by the tunable optical delayer.
Be injected in two cascade electroabsorption modulators that are in the direct voltage bias state by the continuous laser of adjustable continuous wave laser output, these two electroabsorption modulators are by the amplification radiofrequency signal modulation from same radio-frequency signal source.The electric absorption effect takes place in electroabsorption modulator in inside under radiofrequency signal and direct voltage bias, can produce periodic non-linear absorption to the continuous light that injects, thereby produce pulse train.Arrive the time of second electroabsorption modulator by the pulse of tunable optical delayer scalable first electroabsorption modulator generation, pulsed light part in second electroabsorption modulator is absorbed, just can produces repetition rate and the consistent ultrashort light pulse sequence of radio-frequency signal generator output radiofrequency signal repetition rate.When non-linear electric absorption effect took place, electroabsorption modulator was very responsive to bias voltage, for different bias voltages, can produce the rising edge pulse train different with pulse duration in first electroabsorption modulator.Each pulse that in first electroabsorption modulator, produces, will be in second electroabsorption modulator owing to the difference of pulse arrival time, produce the pulse train of distinct pulse widths, in order to obtain ultrashort pulse, by regulating bias voltage and time of delay, in second electroabsorption modulator, only allow the pulse front edge that in first electroabsorption modulator, produces keep, and the centre of absorption pulse and edge, back just can obtain ultrashort pulse.The mid portion and the edge, back that produce pulse in first electroabsorption modulator are absorbed, when the voltage of regulating first direct voltage source, the pulse duration that produces in first electroabsorption modulator is constantly broadened, but pulse duration surpasses when the adjacent twice electric absorption effect interlude of second electroabsorption modulator, will in second electroabsorption modulator, become two pulses to a pulse, pulse front edge that produces in first electroabsorption modulator and edge, back are all remained, and loss is the mid portion of pulse.Make the repetition rate multiplication of pulse and pulsewidth is constant, the pulse spacing after the multiplication is even, regulates the wavelength of continuous wave laser, can realize ultrashort pulse sequence wavelength change, realizes the tunable function of pulse laser.Therefore the utility model is by increasing a tunable optical delayer between first electroabsorption modulator and second electroabsorption modulator, but with regard to the time pulse the repetition rate multiplication and pulsewidth is constant, need not increase corresponding cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Referring to Fig. 1, the utility model comprises radio-frequency signal generator 1, power splitter 2, first radio frequency signal amplifiers 3, second radio frequency signal amplifiers 4, first electroabsorption modulator 6, second electroabsorption modulator 8, first direct voltage source 9, second direct voltage source 10 and a continuous tunable laser 5; Power splitter 2 is connected the output of radio-frequency signal generator 1, first radio frequency signal amplifiers 3, first electroabsorption modulator 6, first direct voltage source 9 are connected on the output of power splitter 2 successively, second radio frequency signal amplifiers 4, second electroabsorption modulator 8, second direct voltage source 10 are connected on another output of power splitter 2 successively, and tunable laser 5 inserts first electroabsorption modulator 6 continuously, first electroabsorption modulator 6 inserts second electroabsorption modulator 8 by tunable optical delayer 7.
During the utility model work, the laser of tunable laser 5 outputs is injected in the cascade electroabsorption modulator continuously, the radiofrequency signal of radio-frequency signal generator 1 output 20GHz, the power splitter portion that is 20GHz by a bandwidth is two, the two-way radiofrequency signal is first radio frequency signal amplifiers 3 of 20GHz by bandwidth, after amplifying, second radio frequency signal amplifiers 4 is loaded into respectively on one's body first electroabsorption modulator 6 and second electroabsorption modulator 8, the light that comes out from second electroabsorption modulator 8 is converted into the signal of telecommunication with the high-speed photodetector detection, display waveform on the high speed sampling oscilloscope, regulate the bias voltage of tunable optical delayer 7 and first electroabsorption modulator 6 and second electroabsorption modulator 8, produce repetition rate 20GHz, the ultrashort pulse sequence of the about 10ps of pulse duration.Utilization produces rising edge, the pulsewidth bias voltage relation added with it of pulse in single electroabsorption modulator, regulate the voltage of first direct voltage source 9, second direct voltage source 10 and the light delay amount of tunable optical delayer 7, on the high speed sampling oscilloscope, obtain pulse train, the repetition rate of its pulse train is 40GHz, the about 10ps of pulsewidth.
Claims (1)
1. tandem type Electroabsorption Modulated Laser, this tandem type Electroabsorption Modulated Laser comprises radio-frequency signal generator, power splitter, first radio frequency signal amplifiers, second radio frequency signal amplifiers, first electroabsorption modulator, second electroabsorption modulator, first direct voltage source, second direct voltage source and a continuous tunable laser; Described power splitter is connected the output of radio-frequency signal generator, described first radio frequency signal amplifiers, first electroabsorption modulator, first direct voltage source is connected on the output of power splitter successively, described second radio frequency signal amplifiers, second electroabsorption modulator, second direct voltage source is connected on another output of power splitter successively, described continuous tunable laser inserts first electroabsorption modulator, described first electroabsorption modulator inserts second electroabsorption modulator, it is characterized in that: described first electroabsorption modulator inserts second electroabsorption modulator by the tunable optical delayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200321737U CN201061080Y (en) | 2007-06-29 | 2007-06-29 | Cascade type electroabsorption modulation laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200321737U CN201061080Y (en) | 2007-06-29 | 2007-06-29 | Cascade type electroabsorption modulation laser |
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| Publication Number | Publication Date |
|---|---|
| CN201061080Y true CN201061080Y (en) | 2008-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200321737U Expired - Fee Related CN201061080Y (en) | 2007-06-29 | 2007-06-29 | Cascade type electroabsorption modulation laser |
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| CN (1) | CN201061080Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393593A (en) * | 2011-06-30 | 2012-03-28 | 北京邮电大学 | Ultra-short pulse light source generating device |
| CN104811172A (en) * | 2015-04-03 | 2015-07-29 | 成都集思科技有限公司 | Novel delay line circuit |
| WO2016041163A1 (en) * | 2014-09-17 | 2016-03-24 | 华为技术有限公司 | Optical signal modulation apparatus and system |
| CN107845941A (en) * | 2017-11-30 | 2018-03-27 | 中国科学院西安光学精密机械研究所 | Photoelectricity cascade microwave signal generating means and method based on gas absorption spectra |
| CN110235322A (en) * | 2016-12-09 | 2019-09-13 | 弗劳恩霍夫应用研究促进协会 | Laser aid and method for manufacturing laser aid |
-
2007
- 2007-06-29 CN CNU2007200321737U patent/CN201061080Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393593A (en) * | 2011-06-30 | 2012-03-28 | 北京邮电大学 | Ultra-short pulse light source generating device |
| CN102393593B (en) * | 2011-06-30 | 2013-08-07 | 北京邮电大学 | Ultra-short pulse light source generating device |
| WO2016041163A1 (en) * | 2014-09-17 | 2016-03-24 | 华为技术有限公司 | Optical signal modulation apparatus and system |
| CN106464384A (en) * | 2014-09-17 | 2017-02-22 | 华为技术有限公司 | Optical signal modulation apparatus and system |
| US10027417B2 (en) | 2014-09-17 | 2018-07-17 | Huawei Technologies Co., Ltd. | Optical signal modulation apparatus and system |
| CN106464384B (en) * | 2014-09-17 | 2019-09-13 | 华为技术有限公司 | A kind of signal modulation device of optical and system |
| CN104811172A (en) * | 2015-04-03 | 2015-07-29 | 成都集思科技有限公司 | Novel delay line circuit |
| CN110235322A (en) * | 2016-12-09 | 2019-09-13 | 弗劳恩霍夫应用研究促进协会 | Laser aid and method for manufacturing laser aid |
| CN107845941A (en) * | 2017-11-30 | 2018-03-27 | 中国科学院西安光学精密机械研究所 | Photoelectricity cascade microwave signal generating means and method based on gas absorption spectra |
| CN107845941B (en) * | 2017-11-30 | 2023-09-01 | 中国科学院西安光学精密机械研究所 | Photoelectric cascade microwave signal generating device and method based on gas absorption spectrum |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20120629 |