CN101021438A - Laser spectral measuring method - Google Patents
Laser spectral measuring method Download PDFInfo
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- CN101021438A CN101021438A CN 200710048644 CN200710048644A CN101021438A CN 101021438 A CN101021438 A CN 101021438A CN 200710048644 CN200710048644 CN 200710048644 CN 200710048644 A CN200710048644 A CN 200710048644A CN 101021438 A CN101021438 A CN 101021438A
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Abstract
The invention discloses a method to measure laser spectrum. Its steps are: (1) Send all laser-beam with laser spectrum information into light splitter to split. (2) Send beam achieved in (1) to light filter with different band. (3) Detect light power of different central wavelength by light signal detector simultaneously and processed by computer to get laser-beam. When detecting impulse laser-beam, generate electric timing impulse and set testing system for controlling light impulse timing measurement. It is a testing method with whole spectrum, which injects all laser-beam onto electrophotonic detector with multi wavelength-channel simultaneously and detector achieves laser spectrum of the whole testing wavelength range. It is more convenient than wavelength scanning in existed technique and can measure all spectrums simultaneously.
Description
Technical field
The present invention relates to laser technology field, be specifically related to the measurement of laser spectrum, comprise continuous laser spectral measurement method and pulse laser spectral measurement method.
Background technology
The laser spectrum characteristic is the important parameter of reflection continuous laser or pulse laser optics feature, and Laser Measurement spectrum is generally Wavelength scanning method in the prior art.
The length scanning method is meant: length scanning once can only be measured the spectral power at a wavelength place, and it requires testing light source all must be stable in test process, by the power spectrum at scanning survey different wave length place one by one, obtains whole laser spectrums.As shown in Figure 1, be the theory diagram that continuous laser spectrum and pulse laser spectral wavelength scanning method are measured, wherein in time be the key of the measurement of pulse laser spectrum synchronously, shown in frame of broken lines among Fig. 1.
Measurement for pulse laser spectrum, need carry out synchro measure in the time period that luminous energy arranged of laser pulse in the cycle, just can obtain correct pulse laser spectrum, therefore pulse laser spectrum and continuous laser spectral measurement difference are to be provided with electric synchronizing pulse, and the light pulse of control synchro measure.The characteristics that the length scanning method is measured are that technology is comparatively ripe, and many spectroanalysis instrument equipment is this type of technical products at present, and its shortcoming is to measure simultaneously each laser spectrum constantly.
Summary of the invention
Technical matters to be solved by this invention is how a kind of laser spectral measuring method is provided, this method is a kind of full spectral measurement scheme, can finish each measurement of spectral signature constantly of continuous laser and pulse laser, but not the length scanning mode in time one by one wavelength obtain spectral information.
The present invention is based on full spectral measurement scheme and constructed a kind of laser spectral measuring method, it is characterized in that, may further comprise the steps:
(1), the laser beam that will contain laser spectrum information is all carried out beam split by optical splitter;
(2), the light beam of telling in the above-mentioned steps is sent into the optical filter of different-waveband respectively;
(3), adopt optical signal detector to measure the luminous power of different centre wavelengths simultaneously, handle by computer data again, obtain the spectrum of laser.
According to laser spectral measuring method provided by the present invention, it is characterized in that, when measuring continuous laser spectrum, may further comprise the steps:
(1), the laser beam that will contain the continuous laser spectral information is all carried out beam split by optical splitter;
(2), the light beam of telling in the above-mentioned steps is sent into the optical filter of different-waveband respectively;
(3), adopt optical signal detector to measure the luminous power of different centre wavelengths simultaneously, handle by computer data again, obtain the spectrum of continuous laser.
According to laser spectral measuring method provided by the present invention, it is characterized in that, when measuring pulse laser spectrum, the test macro of generation with the light pulse of control synchro measure of electric synchronizing pulse is set, may further comprise the steps:
(1), the laser beam that will contain the pulse laser spectral information is all carried out beam split by optical splitter;
(2), the light beam of telling in the above-mentioned steps is sent into the optical filter of different-waveband respectively;
(3), obtain the electric signal of synchro measure, based on the electric impulse signal of the waveform of pulse laser or driving laser and with the pulse laser strict synchronism;
(4), adopt the luminous power of the different centre wavelengths of above-mentioned electric synchronizing signal control detector synchro measure, handle by computer data again, obtain pulse laser spectrum.
Above-mentioned optical splitter can be made of the devices such as optical splitter that optical fibre light splitting device (splitter), optical element are formed; Above-mentioned optical filter can be made of devices such as optical fiber filter, F-P cavity filter, interference filters; Above-mentioned photo-detector adopts PIN photodiode, APD avalanche photodide or the detector corresponding with wavelength to constitute;
Above-mentioned electric synchronizing signal produces with control circuit and adopts general-purpose simulation and digital circuit to obtain, its principle of work is the electric signal that obtains synchro measure by the electric impulse signal of the waveform of measuring pulse laser or driving laser, this signal guarantees and the pulse laser strict synchronism, promptly be to guarantee at laser pulse in the cycle, electricity synchronizing signal control detector realizes the luminous power of the different centre wavelengths of synchro measure, thereby obtains pulse laser spectrum.
Laser spectral measuring method provided by the present invention, it is a kind of full spectral measurement method, be that laser spectrum whole are incided on the photodetector of a plurality of wavelength channels simultaneously, detector obtains the laser spectrum of whole measurement wavelength coverage simultaneously, than length scanning method more convenient and quicker of the prior art, and whole spectrum of Laser Measurement simultaneously.
Description of drawings
Fig. 1 is prior art medium wavelength scanning method continuous laser spectrum and pulse laser spectral measurement block scheme;
Fig. 2 is the schematic diagram of continuous laser spectral measurement method provided by the present invention;
Fig. 3 is the schematic diagram of pulse laser spectral measurement method provided by the present invention;
Fig. 4 is the timing diagram of pulse laser provided by the present invention and electric synchro measure signal;
Fig. 5 adopts the present invention to measure an embodiment of pulse laser spectrum.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figure 2, the principle of continuous laser spectral measurement method provided by the present invention is that the laser beam that contains the continuous laser spectral information is all carried out beam split by optical splitter, the light beam of telling is sent into the optical filter of different-waveband respectively, adopt optical signal detector to measure the luminous power of different centre wavelengths simultaneously, handle by computer data again, obtain the spectrum of continuous laser.
As shown in Figure 3, the principle of pulse laser spectral measurement method provided by the present invention is that the laser beam that contains the pulse laser spectral information is all carried out beam split by optical splitter, the light beam of telling is sent into the optical filter of different-waveband respectively, obtain the electric signal of synchro measure based on the electric impulse signal of the waveform of pulse laser or driving laser, and with the pulse laser strict synchronism, promptly be to guarantee at laser pulse in the cycle, adopt above-mentioned electric synchronizing signal control detector to realize the luminous power of the different centre wavelengths of synchro measure, handle by computer data again, obtain pulse laser spectrum.
Fig. 4 is the pulse laser proposed by the invention and the timing diagram of electric synchro measure signal, above-mentioned electric synchronizing signal produces with control circuit and adopts general-purpose simulation and digital circuit to obtain, its principle of work is the electric signal that obtains synchro measure by the electric impulse signal of the waveform of measuring pulse laser or driving laser, this signal guarantees and the pulse laser strict synchronism, promptly be to guarantee at laser pulse in the cycle, the luminous power of the different centre wavelengths of electric synchronizing signal control detector synchro measure.
Be illustrated in figure 5 as a specific embodiment that adopts the present invention to measure pulse laser spectrum, 1550nm wave band semiconductor laser (LD) light-pulse generator is carried out beam split by optical fibre light splitting device (splitter), enter the different-waveband narrow band filter that constitutes by optical fiber filter respectively and carry out filtering, obtain the electric signal of synchro measure based on the driving electric impulse signal of pulse laser, and with the pulse laser strict synchronism, promptly be to guarantee at laser pulse in the cycle, adopt above-mentioned electric synchronizing signal control avalanche photo diode (APD) to realize the luminous power of the different centre wavelengths of synchro measure, handle by computer data again, obtain pulse laser spectrum.
Claims (2)
1, a kind of laser spectral measuring method is characterized in that, may further comprise the steps:
(1), the laser beam that will have different-waveband is all carried out beam split by optical splitter;
(2), the light beam of telling in the above-mentioned steps is sent into the optical filter of different-waveband respectively;
(3), adopt optical signal detector to survey the size of the luminous power of different centre wavelengths simultaneously, handle by computer data again and obtain laser spectrum.
2, laser spectral measuring method according to claim 1 is characterized in that, when measuring pulse laser spectrum, is provided with the test macro of generation with the light pulse of control synchro measure of electric synchronizing pulse, may further comprise the steps:
(1), the laser beam that will contain the pulse laser spectral information is all carried out beam split by optical splitter;
(2), the light beam of telling in the above-mentioned steps is sent into the optical filter of different-waveband respectively;
(3), obtain the electric signal of synchro measure, based on the electric impulse signal of the waveform of pulse laser or driving laser and with the pulse laser strict synchronism;
(4), adopt the luminous power of the different centre wavelengths of above-mentioned electric synchronizing signal control detector synchro measure, handle by computer data again, obtain pulse laser spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710048644A CN100587420C (en) | 2007-03-16 | 2007-03-16 | Laser spectral measuring method |
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| CN200710048644A CN100587420C (en) | 2007-03-16 | 2007-03-16 | Laser spectral measuring method |
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| CN101021438A true CN101021438A (en) | 2007-08-22 |
| CN100587420C CN100587420C (en) | 2010-02-03 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706360B (en) * | 2009-10-28 | 2011-06-29 | 天津大学 | Method and device for carrying out tunable light filter non-linear test by using F-P etalon |
| CN102301621A (en) * | 2011-04-12 | 2011-12-28 | 华为技术有限公司 | Method and apparatus for monitoring optical power |
| CN103188013A (en) * | 2011-12-29 | 2013-07-03 | 昂纳信息技术（深圳）有限公司 | Method and device for detecting length of single channel light wave |
| WO2014117546A1 (en) * | 2013-02-04 | 2014-08-07 | 杭州远方光电信息有限公司 | Spectrometer |
| CN104792497A (en) * | 2015-03-25 | 2015-07-22 | 武汉光迅科技股份有限公司 | Spectrum testing system using tunable laser light source |
| CN107210818A (en) * | 2015-01-13 | 2017-09-26 | 华为技术有限公司 | For adding optical power source and system with the parallel modulated signal of different wave length |
| CN110186579A (en) * | 2019-05-17 | 2019-08-30 | 华南理工大学 | The space time information acquisition methods and system of ultrafast light field |
| CN110186577A (en) * | 2019-05-17 | 2019-08-30 | 华南理工大学 | The information real-time measurement system of ultrafast light field |
| CN110186578A (en) * | 2019-05-17 | 2019-08-30 | 华南理工大学 | The three domain information acquisition methods and system of ultrafast light field |
| CN113074815A (en) * | 2021-03-09 | 2021-07-06 | 中国科学院上海光学精密机械研究所 | High-repetition-frequency laser spectrum measuring device based on optical fiber time domain stretching dispersion Fourier transform |
| WO2023173789A1 (en) * | 2022-03-15 | 2023-09-21 | 苏州旭创科技有限公司 | Spectrum scanning assembly and optical semiconductor element |
-
2007
- 2007-03-16 CN CN200710048644A patent/CN100587420C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706360B (en) * | 2009-10-28 | 2011-06-29 | 天津大学 | Method and device for carrying out tunable light filter non-linear test by using F-P etalon |
| CN102301621A (en) * | 2011-04-12 | 2011-12-28 | 华为技术有限公司 | Method and apparatus for monitoring optical power |
| WO2011100908A3 (en) * | 2011-04-12 | 2012-03-15 | 华为技术有限公司 | Method and apparatus for monitoring optical power |
| CN102301621B (en) * | 2011-04-12 | 2014-03-12 | 华为技术有限公司 | Method and apparatus for monitoring optical power |
| US9014556B2 (en) | 2011-04-12 | 2015-04-21 | Huawei Technologies Co., Ltd. | Optical power monitoring method and apparatus |
| CN103188013A (en) * | 2011-12-29 | 2013-07-03 | 昂纳信息技术（深圳）有限公司 | Method and device for detecting length of single channel light wave |
| WO2014117546A1 (en) * | 2013-02-04 | 2014-08-07 | 杭州远方光电信息有限公司 | Spectrometer |
| CN107210818A (en) * | 2015-01-13 | 2017-09-26 | 华为技术有限公司 | For adding optical power source and system with the parallel modulated signal of different wave length |
| CN107210818B (en) * | 2015-01-13 | 2021-03-30 | 华为技术有限公司 | Optical power source and system for summing parallel modulated signals of different wavelengths |
| CN104792497B (en) * | 2015-03-25 | 2017-05-31 | 武汉光迅科技股份有限公司 | A kind of Spectrum testing systems of use tunable laser source |
| CN104792497A (en) * | 2015-03-25 | 2015-07-22 | 武汉光迅科技股份有限公司 | Spectrum testing system using tunable laser light source |
| CN110186579A (en) * | 2019-05-17 | 2019-08-30 | 华南理工大学 | The space time information acquisition methods and system of ultrafast light field |
| CN110186577A (en) * | 2019-05-17 | 2019-08-30 | 华南理工大学 | The information real-time measurement system of ultrafast light field |
| CN110186578A (en) * | 2019-05-17 | 2019-08-30 | 华南理工大学 | The three domain information acquisition methods and system of ultrafast light field |
| CN110186578B (en) * | 2019-05-17 | 2020-01-21 | 华南理工大学 | Method and system for acquiring three-domain information of ultrafast light field |
| CN110186577B (en) * | 2019-05-17 | 2020-01-21 | 华南理工大学 | Information real-time measuring system of ultrafast light field |
| CN113074815A (en) * | 2021-03-09 | 2021-07-06 | 中国科学院上海光学精密机械研究所 | High-repetition-frequency laser spectrum measuring device based on optical fiber time domain stretching dispersion Fourier transform |
| WO2023173789A1 (en) * | 2022-03-15 | 2023-09-21 | 苏州旭创科技有限公司 | Spectrum scanning assembly and optical semiconductor element |
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| Publication number | Publication date |
|---|---|
| CN100587420C (en) | 2010-02-03 |
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