CN104966990A - Optical pulse generation method based on SOA negative voltage absorption - Google Patents
Optical pulse generation method based on SOA negative voltage absorption Download PDFInfo
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- CN104966990A CN104966990A CN201510404062.3A CN201510404062A CN104966990A CN 104966990 A CN104966990 A CN 104966990A CN 201510404062 A CN201510404062 A CN 201510404062A CN 104966990 A CN104966990 A CN 104966990A
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Abstract
The invention discloses an optical pulse generation method based on SOA negative voltage absorption. An SOA acts as a modulation device of pulse, and high-extinction-ratio optical pulse output is acquired by periodic pulse voltage signals generated via a current driving module through utilizing the optical amplification effect of the SOA in positive bias and the optical absorption effect of the SOA in the negative bias. The generated optical pulse has the characteristics of narrow linewidth and high extinction ratio and can be applied to various distributed optical fiber sensing systems and the fields of optical communication and microwave photonics, etc. The optical pulse generation method based on the SOA negative voltage absorption has advantages of low cost and simple structure.
Description
Technical field
The invention belongs to LASER Light Source field, particularly a kind of light pulse production method based on SOA negative pressure absorbing.
Background technology
Since nineteen sixty, laser came out, various LASER Light Source is grown up, and creates great impact to the life of people.The light-pulse generator that can export periodic optical pulse is a member important in LASER Light Source, is widely used in the fields such as optical communication, light sensing, machinery, petrochemical industry, building, high ferro, bridge, biology, medical science, space flight, aviation, national defense industry.
In the distributed vibration sensing system that newly-developed gets up, the narrow linewidth light-pulse generator of High Extinction Ratio is one of most crucial device.The scheme realizing light-pulse generator comprises: 1, adopt semiconductor laser inner modulation, can light pulse export, but extinction ratio is not high, and laser wavelength (frequency) changes along with Injection Current and changes, and does not meet distributed vibration sensing system application requirement.2, adopt narrow linewidth laser to export and add electrooptic modulator, extinction ratio only has about 20dB, can not meet distributed vibration sensing system application requirement.3, adopt narrow linewidth laser to export and add acousto-optic modulator, the extinction ratio light pulse that can realize 60dB exports, and meet distributed vibration sensing system application requirement, current major defect is that cost is too high.Therefore, a kind of narrow linewidth light pulse method that cost of manufacture is low, extinction ratio is high is invented significant.
Summary of the invention
The present invention is exactly for the deficiencies in the prior art, proposes a kind of light pulse production method based on SOA negative pressure absorbing.
The present invention uses a narrow linewidth laser, semiconductor optical amplifier (SOA), a current drives module and a TEC temperature control module, the method specifically:
The output port of narrow linewidth laser is connected with the input port fiber of semiconductor optical amplifier by step (1); The output port of semiconductor optical amplifier is as the output port of light-pulse generator; Current drives module is connected with semiconductor optical amplifier cable; TEC temperature control module is connected with semiconductor optical amplifier cable.
Step (2) opens TEC temperature control module, makes semiconductor optical amplifier be operated in steady temperature state; Open narrow linewidth laser, its continuous light exported injects semiconductor optical amplifier, and narrow linewidth laser power output is less than the saturation power of semiconductor optical amplifier; Firing current driver module, this current drives module exports periodic pulse voltage signal.
When described pulse voltage signal is high level, the voltage being carried in semiconductor optical amplifier is forward voltage, and now semiconductor optical amplifier is in forward bias, and the light that narrow linewidth laser is exported amplifies output through semiconductor optical amplifier.
When described pulse voltage signal is low level, the voltage being carried in semiconductor optical amplifier is negative voltage, and now semiconductor optical amplifier is in reverse biased, and the light that narrow linewidth laser is exported all is absorbed by semiconductor optical amplifier.
The optical absorption that the light amplification effect of forward bias and semiconductor optical amplifier are in negative bias is according to semiconductor optical amplifier, when current drives module exports periodic pulse voltage signal, semiconductor optical amplifier obtains periodic light pulse and exports.
The light pulse that the present invention is applicable to High Extinction Ratio produces, utilize SOA to be in optical absorption that the light amplification effect of forward bias and SOA are in negative bias, produces periodic pulse voltage signal, obtain the light pulse of High Extinction Ratio by current drives module.The light pulse production method that the present invention realizes can the field such as application distribution Fibre Optical Sensor, optical communication, Microwave photonics.The present invention has that cost is low, advantages of simple structure and simple.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the optical pulse test result figure realized in embodiment.
Embodiment
As shown in Figure 1, realize the inventive system comprises a narrow linewidth laser 1, SOA(semiconductor optical amplifier) 2, current drives module 3, TEC temperature control module 4.
The method of specific implementation light pulse comprises the following steps:
(1) output port of narrow linewidth laser is connected with the input port fiber of SOA; The output port of SOA is as the output port of light-pulse generator; Current drives module is connected with SOA cable; TEC temperature control module is connected with SOA cable;
(2) open TEC temperature control module, make SOA be operated in steady temperature state; Open narrow linewidth laser, its continuous light exported injects SOA, and narrow linewidth laser power output is less than the saturation power of SOA2; Firing current driver module, it exports periodic pulse voltage signal; SOA exports periodic light pulse signal.
The periodic pulse voltage signal that described current drives module exports has following characteristic: the pulse voltage signal cycle 1, exported determines the light pulse cycle that SOA exports; 2, the pulse voltage signal pulse duration exported determines the light impulse length that SOA exports; 3, time the voltage signal exported is high level, the voltage being carried in SOA is forward voltage, and its magnitude of voltage is SOA normal working voltage, and now current drives module is to SOA Injection Current, and the light that narrow linewidth laser is exported amplifies output through SOA; 4, time the voltage signal exported is low level, the voltage being carried in SOA is negative voltage, and now SOA is in reverse biased, and the light that narrow linewidth laser is exported all is absorbed by SOA.
Be according to SOA the optical absorption that the light amplification effect of forward bias and SOA are in negative bias, when current drives module exports periodic pulse voltage signal, SOA obtains periodic light pulse and exports.
Fig. 2 gives optical pulse test result in embodiment, and its extinction ratio reaches about 50dB.
The present invention is using SOA as the modulation device of pulse, and utilize SOA to be in optical absorption that the light amplification effect of forward bias and SOA are in negative bias, produces by current drives module the light pulse that periodic pulse voltage signal obtains High Extinction Ratio and export.The light pulse produced has the characteristic such as narrow linewidth, High Extinction Ratio, can be applied to the fields such as various distributed optical fiber sensing system, optical communication, Microwave photonics.The present invention has that cost is low, advantages of simple structure and simple.
Claims (3)
1., based on a light pulse production method for SOA negative pressure absorbing, use a narrow linewidth laser, semiconductor optical amplifier, a current drives module and a TEC temperature control module, it is characterized in that the method is specifically:
The output port of narrow linewidth laser is connected with the input port fiber of semiconductor optical amplifier by step (1); The output port of semiconductor optical amplifier is as the output port of light-pulse generator; Current drives module is connected with semiconductor optical amplifier cable; TEC temperature control module is connected with semiconductor optical amplifier cable;
Step (2) opens TEC temperature control module, makes semiconductor optical amplifier be operated in steady temperature state; Open narrow linewidth laser, its continuous light exported injects semiconductor optical amplifier, and narrow linewidth laser power output is less than the saturation power of semiconductor optical amplifier; Firing current driver module, this current drives module exports periodic pulse voltage signal;
When described pulse voltage signal is high level, the voltage being carried in semiconductor optical amplifier is forward voltage, and now semiconductor optical amplifier is in forward bias, and the light that narrow linewidth laser is exported amplifies output through semiconductor optical amplifier;
When described pulse voltage signal is low level, the voltage being carried in semiconductor optical amplifier is negative voltage, and now semiconductor optical amplifier is in reverse biased, and the light that narrow linewidth laser is exported all is absorbed by semiconductor optical amplifier;
The optical absorption that the light amplification effect of forward bias and semiconductor optical amplifier are in negative bias is according to semiconductor optical amplifier, when current drives module exports periodic pulse voltage signal, semiconductor optical amplifier obtains periodic light pulse and exports.
2. a kind of light pulse production method based on SOA negative pressure absorbing according to claim 1, is characterized in that: the periodic pulse voltage signal that described current drives module exports determines the light pulse cycle that semiconductor optical amplifier exports.
3. a kind of light pulse production method based on SOA negative pressure absorbing according to claim 1, is characterized in that: the periodic pulse voltage signal pulse duration that described current drives module exports determines the light impulse length that semiconductor optical amplifier exports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510404062.3A CN104966990A (en) | 2015-07-11 | 2015-07-11 | Optical pulse generation method based on SOA negative voltage absorption |
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Citations (7)
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| CN101390262A (en) * | 2005-12-22 | 2009-03-18 | 波科海姆技术公共有限公司 | Laser tuning |
| CN102474069A (en) * | 2009-07-30 | 2012-05-23 | 古河电气工业株式会社 | Integrated-type semiconductor laser element, semiconductor laser module, and optical transmission system |
| CN102778800A (en) * | 2012-08-16 | 2012-11-14 | 电子科技大学 | Method and device for generating light pulse by direct current light |
| CN103941790A (en) * | 2014-05-09 | 2014-07-23 | 湖北工业大学 | High-speed wide-range high-precision programmable power source of multi-electrode active photoelectric devices |
| CN203838586U (en) * | 2014-05-09 | 2014-09-17 | 湖北工业大学 | High-speed wide-range high-accuracy programmable power supply for multi-electrode active photoelectric devices |
| CN104412468A (en) * | 2012-06-25 | 2015-03-11 | 韩国科学技术院 | Wavelength-maintaining Fabry-Perot laser diode and optical transmitter including same |
| US20150139264A1 (en) * | 2013-11-20 | 2015-05-21 | Coriant Advanced Technology, LLC | Sagnac loop mirror based laser cavity on silicon photonics platform |
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2015
- 2015-07-11 CN CN201510404062.3A patent/CN104966990A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101390262A (en) * | 2005-12-22 | 2009-03-18 | 波科海姆技术公共有限公司 | Laser tuning |
| CN102474069A (en) * | 2009-07-30 | 2012-05-23 | 古河电气工业株式会社 | Integrated-type semiconductor laser element, semiconductor laser module, and optical transmission system |
| CN104412468A (en) * | 2012-06-25 | 2015-03-11 | 韩国科学技术院 | Wavelength-maintaining Fabry-Perot laser diode and optical transmitter including same |
| CN102778800A (en) * | 2012-08-16 | 2012-11-14 | 电子科技大学 | Method and device for generating light pulse by direct current light |
| US20150139264A1 (en) * | 2013-11-20 | 2015-05-21 | Coriant Advanced Technology, LLC | Sagnac loop mirror based laser cavity on silicon photonics platform |
| CN103941790A (en) * | 2014-05-09 | 2014-07-23 | 湖北工业大学 | High-speed wide-range high-precision programmable power source of multi-electrode active photoelectric devices |
| CN203838586U (en) * | 2014-05-09 | 2014-09-17 | 湖北工业大学 | High-speed wide-range high-accuracy programmable power supply for multi-electrode active photoelectric devices |
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