CN104807545A - Space-time collaboration high-precision spectrum measurement apparatus and method - Google Patents
Space-time collaboration high-precision spectrum measurement apparatus and method Download PDFInfo
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Abstract
The invention discloses a space-time collaboration high-precision spectrum measurement apparatus and method. The method includes the steps that the light emitted by a light source (1) reaches a spectral band generation unit to obtain signal light after passing through a narrow free spectrum optical fiber Fabry-Perot scanning interferometer (2); a narrow spectral band is extracted from the signal light, the extracted signal light enters a collimated beam expander (5) through an output optical fiber, the expanded round beams are shaped into horizontal linear beams through a cylindrical lens (6) and are incident on a virtual image phase array device (7) to produce angular dispersion of large angle and form a spatially-separated hyperfine spectral band window, and the round beams are incident on a photodetector array (9) after condensed through focusing lens (8) and input to a processing unit (10) for processing to finally obtain spectrum information of the narrow spectral band. Compared with the prior art, the space-time collaboration high-precision spectrum measurement apparatus and method overcomes the contradiction between high precision and wide range in spectrum analysis, is wide in application range and meets the needs of the development of high flux measurement of a multi-channel optical microfluid sensor.
Description
Technical field
The present invention relates to the high precision spectral measurement field in optical sensing field, particularly relate to a kind of spectral measurement device and method.
Background technology
The micro-resonant cavity producing Echo Wall resonant mode (Whisper Gallery Mode, WGM) can obtain very high quality factor (Q value) in very little size, can up to 10
10.Light can be very high at the resonant transmission number of times of high q-factor resonator cavity, therefore utilizes high q-factor resonator cavity to build sensor, add light and the interactional coverage of material molecule, greatly can improve detection sensitivity.Therefore WGM mould is used to make high-precision light microfluid sensing, especially in bio-sensing field.
The WGM mould of light microfluid sensor can produce a series of equally spaced pectination resonance spectrum.Because the spectrum of WGM mould is very meticulous, the mode of current spectrum analysis or high precision spectrum analysis is done to its wall scroll spectrum in the scope of narrow spectral range of analysis (~ 100pm), or carry out many spectral analyses of low spectral resolution at wide spectral range (~ 100nm).In high flux is measured, need to be used as a passage by each spectral line of micro-resonant cavity WGM mould pectination resonance spectrum, thus realize the wavelength-division multiplex of multiple light microfluid sensor.Therefore both need wide ranges, ensure high resolution again.The present invention, just for this demand, overcomes the deficiency of spectral analysis device in the past and proposes.
Summary of the invention
In order to overcome the problem of above-mentioned prior art, the present invention proposes the high-precision spectral measurement device of a kind of spatio-temporal synergy and method, utilize and narrowly freely compose the time domain multiline wavelength parallel scan that Fabry-perot optical fiber scanning interferometer device carries out narrow spectral range, and utilize virtual image phased array device that each Free Spectral Range is carried out separation parallel detecting by angular dispersion in spatial domain; Spectral measurement is realized by spatio-temporal synergy;
Meanwhile, through technique scheme is slightly converted, parallel light spectrometry can be realized thus realize the high precision wide range parallel light spectrometry to many spectral lines by spatio-temporal synergy.
The present invention proposes the high-precision spectral measurement device of a kind of spatio-temporal synergy, this device comprises light source 1, narrowly freely composes Fabry-perot optical fiber scanning interferometer device 2, narrowly freely composes Fabry-perot optical fiber scanning interferometer device driver 3, spectrum generating unit, collimator and extender mirror 5, cylindrical lens 6, virtual image phased array device 7, condenser lens 8, photodetector array 9 and processing unit 10;
The light that light source 1 sends arrives spectral band generating unit obtain flashlight through narrow Fabry-perot optical fiber scanning interferometer device 2 of freely composing; The spectral band of a close limit is extracted in flashlight, collimator and extender mirror 5 is entered by output optical fibre, circular light beam after expanding becomes the linear beam of level through cylindrical lens 6 shaping, be incident to the angular dispersion that virtual image phased array device 7 produces wide-angle, form the hyperfine spectrum wave band window that space separates, incide after being converged by condenser lens 8 on photodetector array 9, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit 10 and carry out acquisition and processing, finally calculate the spectral information of tested close limit spectral band.
Described spectral band generating unit is made up of wave filter 4, extracts the spectral band of a close limit in flashlight, enters collimator and extender mirror 5 by output optical fibre.
Described spectral band generating unit is made up of wavelength division multiplexer 11, and what arrive wavelength division multiplexer carries out according to spectral range the spectral band that rough segmentation becomes multiple close limit.The spectral band of described multiple close limit enters multiple collimator and extender mirror 5 by different output optical fibres, circular light beam after the multiple-channel output formed expands respectively again becomes the linear beam of level through cylindrical lens 6 shaping, be incident to the angular dispersion that virtual image phased array device 7 produces wide-angle respectively, form the hyperfine spectrum wave band window that space separates, incide after being converged by condenser lens 8 respectively on photodetector array 9, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit 10 respectively and carry out acquisition and processing, the final spectral information calculating tested close limit spectral band respectively.
Described spectral band generating unit is made up of wavelength division multiplexer 11 and photoswitch 12, and the light of arrival is carried out rough segmentation according to spectral range and becomes multiple spectral band by described wavelength division multiplexer 11; The spectral band of described one of them close limit of photoswitch 12 gating, enters collimator and extender mirror 5 by output optical fibre.
The invention allows for the high-precision spectral measurement method of a kind of spatio-temporal synergy, the method comprises following concrete steps:
The light that step 1, wideband light source send freely is composed in Fabry-perot optical fiber scanning interferometer device by Optical Fiber Transmission to narrow, and through narrowly freely composing high-fineness that Fabry-perot optical fiber scanning interferometer device produces, narrow comb spectrum of freely compose is modulated formation and had the light output of comb spectrum;
Step 2, there is the light signal input spectrum wave band generating unit of comb spectrum, extract the spectral band of a close limit, enter into output optical fibre;
The output light of step 3, output optical fibre forms collimated light beam through collimator and extender mirror, assembles in the horizontal direction after inciding cylindrical lens, forms linear beam outgoing;
Step 4, linear beam incide virtual image phased array device, launch outgoing at vertical direction according to wavelength dispersion, and then line focus lens are assembled, thus virtual image phased array device constitutes the hyperfine wave band window that space separates;
Step 5, converging light project photodetector array, and each hyperfine wave band window occupies the pixel that photodetector array quantity is 2 ~ 18;
Step 6, narrowly freely compose that Fabry-perot optical fiber scanning interferometer device driver drives is narrow freely composes Fabry-perot optical fiber scanning interferometer device, drive comb spectrum to scan, thus carry out the parallel spectral line scanning of time domain at each hyperfine spectrum wave band window.The photodetector array pixel of corresponding each hyperfine wave band window is simultaneously by light signal switching electrical signals, accumulation calculating is carried out to all pixels occupied by each hyperfine wave band window, as in this hyperfine wave band window by narrow freely compose one that obtains when Fabry-perot optical fiber scanning interferometer device carries out time scan time the light intensity of inscribing, thus record the spectral information of each hyperfine wave band window;
Step 7, processing unit gather the electric signal that photodetector array exports, and obtain the time domain scan values of photodetector array different spatial, and the data then obtained spatio-temporal synergy are carried out calculating and obtained many spectral informations.Owing to being freely compose interscan each hyperfine the narrow of wave band window, be again the hyperfine wave band window synchronization scanning of multiple wave band, so realize the parallel light spectrometry to the high precision wide range of many spectral lines simultaneously;
In described step 2, spectral band generating unit extracts the spectral band of a close limit by wave filter in flashlight, enters collimator and extender mirror by output optical fibre.
In described step 2, spectral band generating unit by wavelength division multiplexer by arrive wavelength division multiplexer carry out according to spectral range the spectral band that rough segmentation becomes multiple close limit.The spectral band of described multiple close limit enters multiple collimator and extender mirror by different output optical fibres, circular light beam after the multiple-channel output formed expands respectively again becomes the linear beam of level through cylindrical lens shaping, be incident to the angular dispersion that virtual image phased array device 7 produces wide-angle respectively, form the hyperfine spectrum wave band window that space separates, incide after being converged by condenser lens respectively on photodetector array, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit respectively and carry out acquisition and processing, the final spectral information calculating tested close limit spectral band respectively.
In spectral band generating unit, the light arriving wavelength division multiplexer is carried out rough segmentation according to spectral range and become multiple spectral band, by the spectral band of one of them close limit of photoswitch gating, enter collimator and extender mirror by output optical fibre.
Compared with prior art, the present invention has following technique effect:
1, instant invention overcomes the contradiction of high precision and wide region in spectral analysis;
2, the present invention is applied widely, and the comb δ function formula being especially applicable to the narrow spectrum width of the WGM resonant mode of light microfluid sensor is measured, and meets multichannel light microfluid sensor high flux and measures growth requirement.
Accompanying drawing explanation
Fig. 1 is the parallel spectral measurement device schematic diagram of spatio-temporal synergy high precision wide range;
Fig. 2 is the parallel spectral measurement device schematic diagram adopting the spatio-temporal synergy high precision wide range of multiple photodetector array;
Fig. 3 is the parallel spectral measurement device schematic diagram of the spatio-temporal synergy high precision wide range adopting photoswitch to switch;
Fig. 4 is that spatio-temporal synergy walks abreast spectral measurement method schematic diagram;
Fig. 5 is the WGM resonant mode spectrum schematic diagram of light microfluid sensor;
In figure, 1, light source, 2, narrowly freely compose Fabry-perot optical fiber scanning interferometer device, 3, narrowly Fabry-perot optical fiber scanning interferometer device driver is freely composed, 4, wave filter, 5, collimator and extender mirror, 6, cylindrical lens, 7, virtual image phased array device, 8, condenser lens, 9, photodetector array, 10, processing unit, 11, wavelength division multiplexer, 12, photoswitch.
Embodiment
Below in conjunction with the drawings and the specific embodiments, be described in further detail technical scheme of the present invention.
Embodiment 1: the parallel spectral measurement device of spatio-temporal synergy high precision wide range
As shown in Figure 1, the light that light source 1 sends arrives wave filter 4 through narrow Fabry-perot optical fiber scanning interferometer device 2 (being controlled by narrow Fabry-perot optical fiber scanning interferometer device driver 3 of freely composing) of freely composing, after filtering, obtain flashlight; The spectral band of a close limit is extracted in flashlight, collimator and extender mirror 5 is entered by output optical fibre, circular light beam after expanding becomes the linear beam of level through cylindrical lens 6 shaping, be incident to the angular dispersion that virtual image phased array device 7 produces wide-angle, form the hyperfine spectrum wave band window that space separates, incide after being converged by condenser lens 8 on photodetector array 9, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit 10 and carry out acquisition and processing, finally calculate the spectral information of close limit spectral band.
Wherein:
Light source 1, is adopted the wideband light source with wide spectral, is exported, comprise ASE light source and SLD light source by optical fiber;
Narrowly freely compose Fabry-perot optical fiber scanning interferometer device 2, for modulating wide spectral, producing high-fineness, narrowly freely composing very high scanning comb spectrum, its free spectral limit 1 ~ 20GHz, fineness 1000 ~ 5000;
Narrowly freely compose Fabry-perot optical fiber scanning interferometer device control and drive system 3, for being controlled by the comb spectrum scanning of voltage modulated to Fabry-perot optical fiber scanning interferometer device, drive Fabry-perot optical fiber scanning interferometer device to carry out time domain scanning, and obtain the Exact Wave long value of comb spectrum by real-time voltage value;
Wave filter 4, for extracting the spectral band of the close limit of a 1.6 ~ 6.4nm in flashlight, enters into output optical fibre;
Collimator and extender mirror 5, for collimating the carrying out light transferred out in optical fiber being converted into space propagation and beam expander;
Cylindrical lens 6, for realize to space propagation collimated light by circular beam shaping, become the linear beam of level;
Virtual image phased array device 7, for generation of the angular dispersion of wide-angle, its angular dispersion distribution arrangement and horizontal wire beam orthogonal, form the hyperfine spectrum wave band window that space separates, spectral band window size scope is 8 ~ 160pm, match with narrow Free Spectral Range size of freely composing Fabry-perot optical fiber scanning interferometer device, virtual image phased array device is formed by the glass parallel flat of two sides plated film is tilting, the pitch angle of glass parallel flat is 1 ° ~ 10 °, coated reflection rate is 0.85 ~ 0.99, thickness is 50 ~ 1000 μm, for generation of the dispersion of wide-angle, its angular dispersion distribution arrangement is vertical with wire hot spot,
Condenser lens 8, for assembling space parallel beam;
Photodetector array 9, for carrying out opto-electronic conversion to the light intensity of space distribution, each hyperfine wave band window occupies the pixel that photodetector array quantity is 2 ~ 18, the type of photoelectronic detecting array comprise adopt line array CCD or, InGaAs and CMOS detection array gathers spatial light intensity and positional information, and import computing machine into and carry out Storage and Processing;
Processing unit 10, comprise multi-purpose computer and embedded computing system, information electric signal for exporting photodetector array collection carries out acquisition and processing, accumulation calculating is carried out to all pixels occupied by each hyperfine wave band window, as in this hyperfine wave band window by narrow freely compose one that obtains when Fabry-perot optical fiber scanning interferometer device carries out time scan time the light intensity of inscribing, finally calculate spectral information.
The technical solution of the present invention is slightly made to the parallel spectral measurement device of spatio-temporal synergy high precision wide range
Embodiment 2: the parallel spectral measurement device adopting the spatio-temporal synergy high precision wide range of multiple photodetector array
As shown in Figure 2, the light that light source 1 sends arrives wavelength division multiplexer 11 through narrow Fabry-perot optical fiber scanning interferometer device 2 (being controlled by narrow Fabry-perot optical fiber scanning interferometer device driver 3 of freely composing) of freely composing, the spectral band that rough segmentation becomes multiple close limit is carried out according to spectral range, multiple collimator and extender mirror 5 is entered by different output optical fibres, multiple circular light beam after expanding becomes the linear beam of many levels respectively through the shaping of multiple cylindrical lens 6, be incident to the angular dispersion that each corresponding virtual image phased array device 7 produces wide-angle, form the hyperfine spectrum wave band window that multiple space separates, incide on each photodetector array 9 after being converged by each corresponding condenser lens 8, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit 10 and carry out acquisition and processing, finally calculate the spectral information of a wide region spectral band.
Embodiment 3: the parallel spectral measurement device schematic diagram of the spatio-temporal synergy high precision wide range adopting photoswitch to switch
As shown in Figure 3, the light that light source 1 sends arrives wavelength division multiplexer 11 through narrow Fabry-perot optical fiber scanning interferometer device 2 (being controlled by narrow Fabry-perot optical fiber scanning interferometer device driver 3 of freely composing) of freely composing, carry out rough segmentation according to spectral range and become multiple spectral band, the spectral band of one of them close limit of gating is carried out by photoswitch 12, enter collimator and extender mirror 5, circular light beam after expanding becomes the linear beam of many levels through cylindrical lens 6 shaping, be incident to the angular dispersion that virtual image phased array device 7 produces wide-angle, form the hyperfine spectrum wave band window that space separates, incide after being converged by condenser lens 8 on photodetector array 9, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit 10 and carry out acquisition and processing, finally calculate a wide region spectral band spectral information.
Embodiment 4: the parallel spectral measurement method of spatio-temporal synergy high precision wide range
As shown in Figure 1, the light that light source 1 sends arrives wave filter 4 through narrow freely composing after Fabry-perot optical fiber scanning interferometer device 2 (being controlled by narrow Fabry-perot optical fiber scanning interferometer device driver 3 of freely composing) is modulated, after filtering, obtain flashlight; In flashlight, extract the spectral band of a close limit, enter into output optical fibre, be transferred on collimator and extender mirror 5, light shaping is become circular light beam and transfer to cylindrical mirror 6.Circular light beam focuses on through cylindrical mirror 6 becomes linear beam, re-shoots to virtual image phased array device 7, produces the angular dispersion of wide-angle, forms the hyperfine spectrum wave band window that space separates.As shown in Figure 4, ordinate represents locus, the hyperfine spectrum wave band window that the space that virtual image phased array device 7 is formed separates incides on photodetector 9 after being assembled by condenser lens 8, each hyperfine spectrum wave band window and narrow Free Spectral Range (FSR) size of freely composing Fabry-perot optical fiber scanning interferometer device match, and occupying photodetector array 9 pixel quantity is 2 ~ 18; Horizontal ordinate represents time location, narrow Fabry-perot optical fiber scanning interferometer device scanning comb spectrum of freely composing can be controlled to scan in time domain by narrow Fabry-perot optical fiber scanning interferometer device driver 3 of freely composing, and its scanning wavelength scope is a Free Spectral Range (FSR).Each Free Spectral Range (FSR) each hyperfine spectrum wave band window size matches, real-time intensity signal can be received by the pixel on photodetector array 9 and be converted in electric signal input processing unit 10, accumulation calculating is carried out to all pixels occupied by each hyperfine wave band window, as in this hyperfine wave band window by narrow freely compose one that obtains when Fabry-perot optical fiber scanning interferometer device carries out time scan time the light intensity of inscribing, thus record the spectral information of each hyperfine wave band window.The electric signal that processing unit 10 pairs of photodetector arraies 9 export gathers, obtain the time domain scan values of the photodetector array different spatial pixel of corresponding different hyperfine wave band window, then spatio-temporal synergy is carried out to all pixels, many spectral informations can be obtained.Owing to being freely compose interscan each hyperfine the narrow of wave band window, be again the hyperfine wave band window synchronization scanning of multiple wave band, so realize the parallel light spectrometry to the high precision wide range of many spectral lines simultaneously.
Embodiment 5: applicating example
The comb δ function formula that the present invention is especially applicable to the narrow spectrum width of the WGM resonant mode of light microfluid sensor is measured.As shown in Figure 5, this spectral line is the comb δ function formula of the narrow spectrum width of the WGM resonant mode of light microfluid sensor, and be characterized in having very high Q value (can reach 107), therefore spectral line is extremely carefully sharp, needs to carry out high-precision spectral measurement.Meanwhile, in order to the high flux meeting multichannel light microfluid sensor measures demand for development, the spectral measurement ranges reaching tens nanometers is needed.Utilize apparatus of the present invention to receive the comb δ function formula of the narrow spectrum width of the WGM resonant mode of light microfluid sensor, by the parallel Spectroscopy procedures of the high precision wide range of spatio-temporal synergy, finally can obtain its high precision spectral information in wide region at processing unit.
Claims (10)
1. the high-precision spectral measurement device of spatio-temporal synergy, it is characterized in that, this device comprises light source (1), narrowly freely composes Fabry-perot optical fiber scanning interferometer device (2), narrowly freely composes Fabry-perot optical fiber scanning interferometer device driver (3), spectrum generating unit, collimator and extender mirror (5), cylindrical lens (6), virtual image phased array device (7), condenser lens (8), photodetector array (9) and processing unit (10);
The light that light source (1) sends obtains flashlight through narrow Fabry-perot optical fiber scanning interferometer device (2) arrival spectral band generating unit of freely composing, the spectral band of a close limit is extracted in flashlight, collimator and extender mirror (5) is entered by output optical fibre, circular light beam after expanding becomes the linear beam of level through cylindrical lens (6) shaping, be incident to the angular dispersion that virtual image phased array device (7) produces wide-angle, form the hyperfine spectrum wave band window that space separates, incide on photodetector array (9) after being converged by condenser lens (8), opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit (10) and carry out acquisition and processing, finally calculate the spectral information of tested close limit spectral band.
2. the high-precision spectral measurement device of spatio-temporal synergy as claimed in claim 1, it is characterized in that, described spectral band generating unit is made up of wave filter (4), in flashlight, extract the spectral band of a close limit, enter collimator and extender mirror (5) by output optical fibre.
3. the high-precision spectral measurement device of spatio-temporal synergy as claimed in claim 1, it is characterized in that, described spectral band generating unit is made up of wavelength division multiplexer (11), and what arrive wavelength division multiplexer carries out according to spectral range the spectral band that rough segmentation becomes multiple close limit.
4. the high-precision spectral measurement device of spatio-temporal synergy as claimed in claim 3, it is characterized in that, the spectral band of described multiple close limit enters multiple collimator and extender mirror (5) by different output optical fibres, circular light beam after the multiple-channel output formed expands respectively again becomes the linear beam of level through cylindrical lens (6) shaping, be incident to the angular dispersion that virtual image phased array device (7) produces wide-angle respectively, form the hyperfine spectrum wave band window that space separates, incide on photodetector array (9) after being converged by condenser lens (8) respectively, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit (10) respectively and carry out acquisition and processing, the final spectral information calculating tested close limit spectral band respectively.
5. the high-precision spectral measurement device of spatio-temporal synergy as claimed in claim 1, it is characterized in that, described spectral band generating unit is made up of wavelength division multiplexer (11) and photoswitch (12), and the light of arrival is carried out rough segmentation according to spectral range and becomes multiple spectral band by described wavelength division multiplexer (11); The spectral band of described photoswitch (12) one of them close limit of gating, enters collimator and extender mirror (5) by output optical fibre.
6. the high-precision spectral measurement method of spatio-temporal synergy, is characterized in that, the method comprises following concrete steps:
The light that step (1), wideband light source send freely is composed in Fabry-perot optical fiber scanning interferometer device by Optical Fiber Transmission to narrow, and through narrowly freely composing high-fineness that Fabry-perot optical fiber scanning interferometer device produces, narrow comb spectrum of freely compose is modulated formation and had the light output of comb spectrum;
Step (2), there is the light signal input spectrum wave band generating unit of comb spectrum, extract the spectral band of a close limit, enter into output optical fibre;
The output light of step (3), output optical fibre forms collimated light beam through collimator and extender mirror, assembles in the horizontal direction after inciding cylindrical lens, forms linear beam outgoing;
Step (4), linear beam incide virtual image phased array device, launch outgoing at vertical direction according to wavelength dispersion, and then line focus lens are assembled, thus virtual image phased array device constitutes the hyperfine wave band window that space separates;
Step (5), converging light project photodetector array, and each hyperfine wave band window occupies the pixel that photodetector array quantity is 2 ~ 18;
Step (6), narrowly freely compose that Fabry-perot optical fiber scanning interferometer device driver drives is narrow freely composes Fabry-perot optical fiber scanning interferometer device, drive comb spectrum to scan, thus carry out the parallel spectral line scanning of time domain at each hyperfine spectrum wave band window; The photodetector array pixel of corresponding each hyperfine wave band window is simultaneously by light signal switching electrical signals, accumulation calculating is carried out to all pixels occupied by each hyperfine wave band window, as in this hyperfine wave band window by narrow freely compose one that obtains when Fabry-perot optical fiber scanning interferometer device carries out time scan time the light intensity of inscribing, thus record the spectral information of each hyperfine wave band window;
Step (7), processing unit gather the electric signal that photodetector array exports, and obtain the time domain scan values of photodetector array different spatial, and the data then obtained spatio-temporal synergy are carried out calculating and obtained many spectral informations; Owing to being freely compose interscan each hyperfine the narrow of wave band window, be again the hyperfine wave band window synchronization scanning of multiple wave band, so realize the parallel light spectrometry to the high precision wide range of many spectral lines simultaneously.
7. the high-precision spectral measurement method of spatio-temporal synergy as claimed in claim 6, it is characterized in that, in described step (2), spectral band generating unit extracts the spectral band of a close limit by wave filter in flashlight, enters collimator and extender mirror by output optical fibre.
8. the high-precision spectral measurement method of spatio-temporal synergy as claimed in claim 6, it is characterized in that, in described step (2), spectral band generating unit by wavelength division multiplexer by arrive wavelength division multiplexer carry out according to spectral range the spectral band that rough segmentation becomes multiple close limit.
9. the high-precision spectral measurement method of spatio-temporal synergy as claimed in claim 8, it is characterized in that, the spectral band of described multiple close limit enters multiple collimator and extender mirror by different output optical fibres, circular light beam after the multiple-channel output formed expands respectively again becomes the linear beam of level through cylindrical lens shaping, be incident to the angular dispersion that virtual image phased array device produces wide-angle respectively, form the hyperfine spectrum wave band window that space separates, incide after being converged by condenser lens respectively on photodetector array, opto-electronic conversion is carried out to the light intensity of space distribution, and be input to processing unit respectively and carry out acquisition and processing, the final spectral information calculating tested close limit spectral band respectively.
10. the high-precision spectral measurement method of spatio-temporal synergy as claimed in claim 9, it is characterized in that, in described step (2), in spectral band generating unit, the light arriving wavelength division multiplexer is carried out rough segmentation according to spectral range and become multiple spectral band, by the spectral band of one of them close limit of photoswitch gating, enter collimator and extender mirror by output optical fibre.
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| CN108489902A (en) * | 2018-05-17 | 2018-09-04 | 电子科技大学 | A kind of the optical-fiber laser miniflow detector and detection method of high duplication |
| WO2021196744A1 (en) * | 2020-03-31 | 2021-10-07 | 北京科益虹源光电技术有限公司 | Laser spectrum online measurement device and method |
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