CN105043559A - Double-focal lens-based CARS spectral temperature measurement device - Google Patents
Double-focal lens-based CARS spectral temperature measurement device Download PDFInfo
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- CN105043559A CN105043559A CN201510586168.XA CN201510586168A CN105043559A CN 105043559 A CN105043559 A CN 105043559A CN 201510586168 A CN201510586168 A CN 201510586168A CN 105043559 A CN105043559 A CN 105043559A
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Abstract
The invention relates to a CARS spectral temperature measurement device, in particular, a double-focal lens-based CARS spectral temperature measurement device. When a common CARS device is adopted to measure flames, only a common lens is adopted, and as a result, the temperature information of only one position can be monitored, while with the CARS spectral temperature measurement device adopted, the above situation can be avoided. The CARS spectral temperature measurement device comprises a femtosecond laser, a first beam splitting sheet, a second beam splitting sheet, a third beam splitting sheet, a four beam splitting sheet, a first reflector, a second reflector, a third reflector, a fourth reflector, a fifth reflector, a sixth reflector, a seventh reflector, an eighth reflector, a ninth reflector, an eleventh reflector, a twelfth reflector, a thirteenth reflector, a fourteenth reflector, an optical parametric amplifier, a first time delay device, a second time delay device, a first bifocal lens, a second bifocal lens, a flame generating device, a first diaphragm, a second diaphragm, a first lens, a second lens, a first optical fiber coupling device, a second optical fiber coupling device, a first optical fiber, a second optical fiber, a first spectrograph, a second spectrograph, a first CCD array detector, a second CCD array detector and a computer. The double-focal lens-based CARS spectral temperature measurement device of the invention is applied to the CARS temperature measurement field.
Description
Technical field
The present invention relates to CARS spectrum temperature measuring device, particularly a kind of CARS spectrum temperature measuring device based on bifocal lens.
Background technology
Coherent antistockes Raman spectroscopy (CoherentAnti-StokesRamanSpectroscopy, be called for short CARS) be a kind of important nonlinear optical spectral technology in femtosecond scientific research, femto-second laser pulse is utilized to excite the Raman mode of vibration of molecule as pump light and stokes light acting in conjunction and the temporal evolution of Molecular Raman mode of vibration be excited by time delay detection photodetection, the molecule ultra-fast dynamics process that the femtosecond CARS signal obtained not only can reflect material microcosmic is detected in experiment, and the macro-temperature information of molecule can be reflected, therefore femtosecond CARS is a kind of important means of carrying out gaseous combustion thermometric.
CARS spectrum is a kind of important method measuring flame temperature, has higher signal to noise ratio (S/N ratio) compared with traditional thermometric mode.Conventional CARS device, when measuring flame, adopts ordinary lens, can only produce a CARS signal, thus can only monitor the temperature information of a position a position.
Summary of the invention
The object of the invention is to solve conventional CARS device when measuring flame, adopting ordinary lens, the problem of the temperature information of a position can only be monitored.And a kind of CARS spectrum temperature measuring device based on bifocal lens proposed.
Above-mentioned goal of the invention is achieved through the following technical solutions:
Femto-second laser 1, first beam splitting chip 2, first catoptron 3, second catoptron 4, 3rd catoptron 5, second beam splitting chip 6, 4th catoptron 7, optical parametric amplifier and OPA8, very first time deferred mount 9, second time delays device 10, 3rd beam splitting chip 11, 5th catoptron 12, 6th catoptron 13, 4th beam splitting chip 14, 7th catoptron 15, first bifocal lens 16, flame generating device 17, second bifocal lens 18, first diaphragm 19, 8th catoptron 20, 9th catoptron 21, second diaphragm 22, 11 catoptron 23, tenth two-mirror 24, 13 catoptron 25, 14 catoptron 26, first lens 27, second lens 28, first optical fiber coupling device 29, second optical fiber coupling device 30, first optical fiber 31, second optical fiber 32, first spectrometer 33, second spectrometer 34, first ccd array detector 35, second ccd array detector 36 and computing machine 37,
The laser that femto-second laser 1 penetrates is divided into two-beam after the first beam splitting chip 2, and wherein light beam reflexes to optical parametric amplifier and OPA8 through the first catoptron 3 and enters very first time deferred mount 9 and reflex to the first bifocal lens 16 through the 4th catoptron 7; Another light beam reflexes to the 3rd catoptron 5 through the second catoptron 4; Two-beam was divided into after the reflection ray of the 3rd catoptron 5 enters the second beam splitting chip 6, wherein light beam enters the second time delays device 10 and is divided into two-beam through the 3rd beam splitting chip 11, wherein light beam enters the first bifocal lens 16, and another light beam reflexes to the first bifocal lens 16 through the 5th catoptron 12; The another light beam that second beam splitting chip 6 is divided into through the 7th catoptron 15 reflex to be divided into after the 4th beam splitting chip 14 two-beam wherein light beam enter the first bifocal lens 16, another light beam reflexes to the first bifocal lens 16 through the 6th catoptron 13; Wherein, five light beams through the first bifocal lens 16 are parallel;
Five light beams focus on flame generating device 17 through the first bifocal lens and produce 2 points on flame, and 2 positions produce two CARS signals, and wherein, two CARS signals are respectively with red and Green Marker differentiation;
Two CARS signals and five light beams, through the second bifocal lens 18, are converted into directional light and arrive on the first diaphragm 19, second diaphragm 22, the 8th catoptron the 20 and the 11 catoptron 23;
Wherein, by the first diaphragm 19 and the second diaphragm 22, two CARS signals are chosen out; Through the light reflection of the 8th catoptron 20 to the 9th catoptron 21; The light reflection of the 9th catoptron 21 is to the tenth two-mirror 24; Through the light reflection of the tenth two-mirror 24 to the 13 catoptron 25, the light reflection through the 13 catoptron 25 focuses in the second optical fiber coupling device 30 after the first lens 27; Be input to after on the first spectrometer 33 by the first optical fiber 31, after the first ccd array detector 35, processed by computing machine 37;
Through the light reflection of the 11 catoptron 23 to the 14 catoptron 26, the light reflection through the 14 catoptron 26 focuses in the first optical fiber coupling device 29 after the second lens 28, after on the second intelligent acess to the second spectrometer 34; After the second ccd array detector 36, processed by computing machine 37;
Wherein, very first time deferred mount 9, second time delays device 10, first ccd array detector 35 is connected with computing machine 37 respectively with the second ccd array detector 36.
Invention effect
Along with the development of ultra-short pulse laser technology, the optical pulse laser of tens femtoseconds is widely applied in nonlinear optics, makes the femtosecond coherent antistockes Raman spectroscopy technology of the macro-temperature information studying material molecule become possibility.Utilize the CARS spectrum investigating system that tunable femto-second laser system building is above-mentioned, can be used for surveying and drawing the Temperature Distribution of thermal-flame, thus the understanding impelling people to deepen burning, for Thorough combustion, to improve engine etc. significant.The invention provides a kind of based on bifocal lens CARS spectroscopic temperature measurement experimental provision adopt bifocal lens, achieve the monitoring to flame two position temperature informations, this device observable temperature scope is large: 300K ~ 2400K, measuring accuracy is high, reach 1% ~ 3%, single-point thermometric speed can reach 1KHz even 5KHz.And based on bifocal lens CARS spectroscopic temperature measurement experimental provision realize operation as follows:
1 builds light path as shown in Figure 1.
2 start laser instruments, adjust the first time-delay mechanism and the second time-delay mechanism respectively to the optimum delay time.
3 the 3rd beam splitters, the 4th beam splitter, the 5th catoptron, the 6th catoptron and the first bifocal lens realize the output of two CARS signals.
4 utilize diaphragm to select two CARS signals.
CARS signal coupling is entered optical fiber, through spectrometer and CCD, imports computing machine into, after data analysis, obtain flame two position temperature informations.
Accompanying drawing explanation
Fig. 1 is a kind of CARS spectrum temperature measuring device schematic diagram based on bifocal lens that embodiment one proposes.
Embodiment
Embodiment one: a kind of CARS spectrum temperature measuring device based on bifocal lens of present embodiment, specifically comprises:
Femto-second laser 1, first beam splitting chip 2, first catoptron 3, second catoptron 4, 3rd catoptron 5, second beam splitting chip 6, 4th catoptron 7, optical parametric amplifier and OPA8, very first time deferred mount 9, second time delays device 10, 3rd beam splitting chip 11, 5th catoptron 12, 6th catoptron 13, 4th beam splitting chip 14, 7th catoptron 15, first bifocal lens 16, flame generating device 17, second bifocal lens 18, first diaphragm 19, 8th catoptron 20, 9th catoptron 21, second diaphragm 22, 11 catoptron 23, tenth two-mirror 24, 13 catoptron 25, 14 catoptron 26, first lens 27, second lens 28, first optical fiber coupling device 29, second optical fiber coupling device 30, first optical fiber 31, second optical fiber 32, first spectrometer 33, second spectrometer 34, first ccd array detector 35, second ccd array detector 36 and computing machine 37,
The laser that femto-second laser 1 penetrates is divided into two-beam after the first beam splitting chip 2, and wherein light beam reflexes to optical parametric amplifier and OPA8 through the first catoptron 3 and enters very first time deferred mount 9 and reflex to the first bifocal lens 16 through the 4th catoptron 7; Another light beam reflexes to the 3rd catoptron 5 through the second catoptron 4; Two-beam was divided into after the reflection ray of the 3rd catoptron 5 enters the second beam splitting chip 6, wherein light beam enters the second time delays device 10 and is divided into two-beam through the 3rd beam splitting chip 11, wherein light beam enters the first bifocal lens 16, and another light beam reflexes to the first bifocal lens 16 through the 5th catoptron 12; The another light beam that second beam splitting chip 6 is divided into through the 7th catoptron 15 reflex to be divided into after the 4th beam splitting chip 14 two-beam wherein light beam enter the first bifocal lens 16, another light beam reflexes to the first bifocal lens 16 through the 6th catoptron 13; Wherein, five light beams through the first bifocal lens 16 are parallel;
Five light beams focus on flame generating device 17 through the first bifocal lens and produce 2 points on flame, and 2 positions produce two CARS signals, and wherein, two CARS signals are respectively with red and Green Marker differentiation;
Two CARS signals and five light beams, through the second bifocal lens 18, are converted into directional light and arrive on the first diaphragm 19, second diaphragm 22, the 8th catoptron the 20 and the 11 catoptron 23;
Wherein, by the first diaphragm 19 and the second diaphragm 22, two CARS signals are chosen out; Through the light reflection of the 8th catoptron 20 to the 9th catoptron 21; The light reflection of the 9th catoptron 21 is to the tenth two-mirror 24; Through the light reflection of the tenth two-mirror 24 to the 13 catoptron 25, the light reflection through the 13 catoptron 25 focuses in the second optical fiber coupling device 30 after the first lens 27; Be input to after on the first spectrometer 33 by the first optical fiber 31, after the first ccd array detector 35, processed by computing machine 37, carry out the measurement of testing;
Through the light reflection of the 11 catoptron 23 to the 14 catoptron 26, the light reflection through the 14 catoptron 26 focuses in the first optical fiber coupling device 29 after the second lens 28, after on the second intelligent acess to the second spectrometer 34; After the second ccd array detector 36, processed by computing machine 37, carry out the measurement of testing;
Wherein, very first time deferred mount 9, second time delays device 10, first ccd array detector 35 is connected with computing machine 37 respectively with the second ccd array detector 36.
Present embodiment effect:
Along with the development of ultra-short pulse laser technology, the optical pulse laser of tens femtoseconds is widely applied in nonlinear optics, makes the femtosecond coherent antistockes Raman spectroscopy technology of the macro-temperature information studying material molecule become possibility.Utilize the CARS spectrum investigating system that tunable femto-second laser system building is above-mentioned, can be used for surveying and drawing the Temperature Distribution of thermal-flame, thus the understanding impelling people to deepen burning, for Thorough combustion, to improve engine etc. significant.Present embodiment provide a kind of based on bifocal lens CARS spectroscopic temperature measurement experimental provision adopt bifocal lens, achieve the monitoring to flame two position temperature informations.This device observable temperature scope is large: 300K ~ 2400K, and measuring accuracy is high, reaches 1% ~ 3%, and single-point thermometric speed can reach 1KHz even 5KHz.And based on bifocal lens CARS spectroscopic temperature measurement experimental provision realize operation as follows:
1 builds light path as shown in Figure 1.
2 start laser instruments, adjust the first time-delay mechanism and the second time-delay mechanism respectively to the optimum delay time.
3 the 3rd beam splitters, the 4th beam splitter, the 5th catoptron, the 6th catoptron and the first bifocal lens realize the output of two CARS signals.
4 utilize diaphragm to select two CARS signals.
CARS signal coupling is entered optical fiber, through spectrometer and CCD, imports computing machine into, after data analysis, obtain flame two position temperature informations.
Embodiment two: present embodiment and embodiment one unlike: the first described bifocal lens 16 and the second same axis of bifocal lens 18 are arranged in order setting.Other step and parameter identical with embodiment one.
Embodiment three: present embodiment and embodiment one or two unlike: described femto-second laser 1 penetrates the laser vertical with axis, laser is divided into and axis parallel and vertical two-beam through the first beam splitting chip 2, and to inject respectively with axis angle be first catoptron 3 and second catoptron 4 of 45 °;
What the first beam splitting chip 2 was divided into reflex to optical parametric amplifier and OPA8 with the light beam of axis parallel through the first catoptron 3 enters very first time deferred mount 9 and reflexes to the first bifocal lens 16 through the 4th catoptron 7;
The light beam vertical with axis that first beam splitting chip 2 is divided into reflexes to the 3rd catoptron 5 through the second catoptron 4; Be divided into and axis parallel and vertical two-beam after the reflection ray of the 3rd catoptron 5 injects the second beam splitting chip 6.Other step and parameter identical with embodiment one or two.
Embodiment four: present embodiment and one of embodiment one to three unlike: what the second described beam splitting chip 6 was divided into enter the second time delays device 10 with axis normal beam is divided into and axis parallel and vertical two-beam through the 3rd beam splitting chip 11;
Reflexing to after the 4th beam splitting chip 14 through the 7th catoptron 15 with axis parallel light beam that second beam splitting chip 6 is divided into is divided into and axis parallel and vertical two-beam.Other step and parameter identical with one of embodiment one to three.
Embodiment five: what one of present embodiment and embodiment one to four were divided into unlike: the 3rd described beam splitting chip 11 enter with axis parallel light beam the light beam vertical with axis that the first bifocal lens the 16, three beam splitting chip 11 is divided into reflexes to the first bifocal lens 16 through the 5th catoptron 12;
What the 4th beam splitting chip 14 was divided into enter with axis parallel light beam the light beam vertical with axis that the first bifocal lens the 16, four beam splitting chip 14 is divided into reflexes to the first bifocal lens 16 through the 6th catoptron 13.Other step and parameter identical with one of embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five unlike: described femto-second laser 1 is titanium-doped sapphire femto-second laser.Other step and parameter identical with one of embodiment one to five.
Embodiment seven: one of present embodiment and embodiment one to six unlike: described titanium-doped sapphire femto-second laser output pulse width is about 40fs, centre wavelength 800nm.Other step and parameter identical with one of embodiment one to six.
Embodiment eight: one of present embodiment and embodiment one to seven, unlike described optical parametric amplifier and OPA8, select the SHS configuration in TOPAS-800-fs-VIS.Other step and parameter identical with one of embodiment one to seven.
Embodiment nine: one of present embodiment and embodiment one to eight unlike: the HR4000CG-CN-NIR model spectrometer that the first described spectrometer 33 and the second spectrometer 34 adopt Ocean to produce, can detect the signal of 200-1100nm wavelength coverage.Other step and parameter identical with one of embodiment one to eight.
Embodiment ten: one of present embodiment and embodiment one to nine are unlike 10, a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 9, and what it is characterized in that described the first ccd array detector 35 and the second ccd array detector 36 adopt is the TCD1304AP linear CCD array that Toshiba produces.Other step and parameter identical with one of embodiment one to nine.
Principle of work:
1, light path is as shown in the figure built.
2, laser instrument is started, the laser of femto-second laser outgoing, two bundles are divided into through beam splitting chip, wherein a branch of through beam splitter and the first catoptron reflection arrival optical parametric amplifier, when ensureing certain power stage, realize the tunable of wavelength, enter very first time deferred mount afterwards, passed through reflection arrival first bifocal lens; Another bundle is through reflection arrival second beam splitting chip, be divided into two bundles, wherein a branch of through reflection and beam splitting, again be divided into two bundles, two-beam is through reflection arrival first bifocal lens, and another bundle, through the second time delays device, arrives the 3rd beam splitting chip, be divided into two bundles, this two bundles reflection arrival first bifocal lens.Five light beams are subject to the focussing force of the first bifocal lens, focus on 2 points in flame radial direction respectively, produce two CARS signals two positions simultaneously, distinguish respectively with red and Green Marker.Two bundle CARS signals and five light beams are through the second bifocal lens, be converted into directional light, two bundle CARS signals are chosen out by diaphragm, respectively through multiple reflections, arrive lens, thus be focused onto in optical fiber coupling device, by intelligent acess to spectrometer, after array CCD, processed by computing machine, carry out the measurement of testing.
Following examples are adopted to verify beneficial effect of the present invention:
Embodiment one:
A kind of CARS spectrum temperature measuring device based on bifocal lens of the present embodiment, specifically prepare according to following steps:
First bifocal lens 16 and the second same axis of bifocal lens 18 are arranged in order setting, on the flame that flame generating device 17 is occurred by flame generating device 17 between the first bifocal lens 16 and the second bifocal lens 18 and by the first bifocal lens 16 light;
Femto-second laser 1 penetrates the laser vertical with axis, and laser is divided into and axis parallel and vertical two-beam through the first beam splitting chip 2, and to inject respectively with axis angle be first catoptron 3 and second catoptron 4 of 45 °;
What the first beam splitting chip 2 was divided into reflex to optical parametric amplifier and OPA8 with the light beam of axis parallel through the first catoptron 3 enters very first time deferred mount 9 and reflexes to the first bifocal lens 16 through the 4th catoptron 7;
The light beam vertical with axis that first beam splitting chip 2 is divided into reflexes to the 3rd catoptron 5 through the second catoptron 4; Be divided into and axis parallel and vertical two-beam after the reflection ray of the 3rd catoptron 5 enters the second beam splitting chip 6;
Wherein, what the second beam splitting chip 6 was divided into enter the second time delays device 10 with axis normal beam is divided into and axis parallel and vertical two-beam through the 3rd beam splitting chip 11, what wherein the 3rd beam splitting chip 11 was divided into enter with axis parallel light beam the light beam vertical with axis that the first bifocal lens the 16, three beam splitting chip 11 is divided into reflexes to the first bifocal lens 16 through the 5th catoptron 12;
Reflexing to after the 4th beam splitting chip 14 through the 7th catoptron 15 with axis parallel light beam that second beam splitting chip 6 is divided into is divided into and axis parallel and vertical two-beam; Wherein, what the 4th beam splitting chip 14 was divided into enter with axis parallel light beam the light beam vertical with axis that the first bifocal lens the 16, four beam splitting chip 14 is divided into reflexes to the first bifocal lens 16 through the 6th catoptron 13; Wherein, five light beams through the first bifocal lens 16 are parallel;
Five light beams focus on flame generating device 17 through the first bifocal lens and produce 2 points on flame, and 2 positions produce two CARS signals, and wherein, two CARS signals are respectively with red and Green Marker differentiation;
Two CARS signals and five light beams, through the second bifocal lens 18, are converted into directional light and arrive on the first diaphragm 19, second diaphragm 22, the 8th catoptron the 20 and the 11 catoptron 23; First diaphragm 19 is vertical with axis respectively with the second diaphragm 22;
Wherein, by the first diaphragm 19 and the second diaphragm 22, two CARS signals are chosen out; The reflection ray vertical with axis of the 8th catoptron 20 reflexes to the 9th catoptron 21; 9th catoptron 21 reflex to the tenth two-mirror 24 with the reflection ray of axis parallel; The reflection ray vertical with axis through the tenth two-mirror 24 reflexes to the 13 catoptron 25, focuses in the second optical fiber coupling device 30 after the 13 catoptron 25 and the reflection ray of axis parallel reflex to the first lens 27; Be input to after on the first spectrometer 33 by the first optical fiber 31, after the first ccd array detector 35, processed by computing machine 37, carry out the measurement of testing;
The reflection ray vertical with axis of the 11 catoptron 23 reflexes to the 14 catoptron 26,14 catoptron 26 reflex to the second lens 28 with the reflection ray of axis parallel after focus in the first optical fiber coupling device 29, after on the second intelligent acess to the second spectrometer 34; After the second ccd array detector 36, processed by computing machine 37, carry out the measurement of testing;
The present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those skilled in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (10)
1., based on a CARS spectrum temperature measuring device for bifocal lens, it is characterized in that described device comprises:
Femto-second laser (1), first beam splitting chip (2), first catoptron (3), second catoptron (4), 3rd catoptron (5), second beam splitting chip (6), 4th catoptron (7), optical parametric amplifier and OPA (8), very first time deferred mount (9), second time delays device (10), 3rd beam splitting chip (11), 5th catoptron (12), 6th catoptron (13), 4th beam splitting chip (14), 7th catoptron (15), first bifocal lens (16), flame generating device (17), second bifocal lens (18), first diaphragm (19), 8th catoptron (20), 9th catoptron (21), second diaphragm (22), 11 catoptron (23), tenth two-mirror (24), 13 catoptron (25), 14 catoptron (26), first lens (27), second lens (28), first optical fiber coupling device (29), second optical fiber coupling device (30), first optical fiber (31), second optical fiber (32), first spectrometer (33), second spectrometer (34), first ccd array detector (35), second ccd array detector (36) and computing machine (37),
The laser that femto-second laser (1) penetrates is divided into two-beam after the first beam splitting chip (2), and wherein light beam reflexes to optical parametric amplifier and OPA (8) through the first catoptron (3) and enters very first time deferred mount (9) and reflex to the first bifocal lens (16) through the 4th catoptron (7); Another light beam reflexes to the 3rd catoptron (5) through the second catoptron (4); Two-beam was divided into after the reflection ray of the 3rd catoptron (5) enters the second beam splitting chip (6), wherein light beam enters the second time delays device (10) and is divided into two-beam through the 3rd beam splitting chip (11), wherein light beam enters the first bifocal lens (16), and another light beam reflexes to the first bifocal lens (16) through the 5th catoptron (12); The another light beam that second beam splitting chip (6) is divided into through the 7th catoptron (15) reflex to be divided into after the 4th beam splitting chip (14) two-beam wherein light beam enter the first bifocal lens (16), another light beam reflexes to the first bifocal lens (16) through the 6th catoptron (13); Wherein, five light beams through the first bifocal lens (16) are parallel;
Five light beams focus on 2 points on flame generating device (17) generation flame through the first bifocal lens, and 2 positions produce two CARS signals, and wherein, two CARS signals are distinguished with red and Green Marker respectively;
Two CARS signals and five light beams, through the second bifocal lens (18), are converted into directional light and arrive on the first diaphragm (19), the second diaphragm (22), the 8th catoptron (20) and the 11 catoptron (23);
Wherein, by the first diaphragm (19) and the second diaphragm (22), two CARS signals are chosen out; Through the light reflection of the 8th catoptron (20) to the 9th catoptron (21); The light reflection of the 9th catoptron (21) is to the tenth two-mirror (24); Through the light reflection of the tenth two-mirror (24) to the 13 catoptron (25), the light reflection through the 13 catoptron (25) focuses in the second optical fiber coupling device (30) after the first lens (27); Be input to after on the first spectrometer (33) by the first optical fiber (31), after the first ccd array detector (35), processed by computing machine (37);
Through the light reflection of the 11 catoptron (23) to the 14 catoptron (26), light reflection through the 14 catoptron (26) focuses in the first optical fiber coupling device (29) after the second lens (28), after upper to the second spectrometer (34) by the second intelligent acess; After the second ccd array detector (36), processed by computing machine (37);
Wherein, very first time deferred mount (9), the second time delays device (10), the first ccd array detector (35) are connected with computing machine (37) respectively with the second ccd array detector (36).
2. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 1, is characterized in that described the first bifocal lens (16) and the second bifocal lens (18) same axis are arranged in order setting.
3. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 2, it is characterized in that described femto-second laser 1 penetrates the laser vertical with axis, laser is divided into and axis parallel and vertical two-beam through the first beam splitting chip (2), and to inject respectively with axis angle be the first catoptron (3) and second catoptron (4) of 45 °;
What the first beam splitting chip (2) was divided into reflex to optical parametric amplifier and OPA (8) with the light beam of axis parallel through the first catoptron (3) enters very first time deferred mount (9) and reflexes to the first bifocal lens (16) through the 4th catoptron (7);
The light beam vertical with axis that first beam splitting chip (2) is divided into reflexes to the 3rd catoptron (5) through the second catoptron (4); Be divided into and axis parallel and vertical two-beam after the reflection ray of the 3rd catoptron (5) injects the second beam splitting chip (6).
4. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 3, what it is characterized in that described the second beam splitting chip (6) is divided into enters the second time delays device (10) with axis normal beam and is divided into and axis parallel and vertical two-beam through the 3rd beam splitting chip (11);
Reflexing to after the 4th beam splitting chip (14) through the 7th catoptron (15) with axis parallel light beam that second beam splitting chip (6) is divided into is divided into and axis parallel and vertical two-beam.
5. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 4, what it is characterized in that the 3rd described beam splitting chip (11) is divided into enters the first bifocal lens (16) with axis parallel light beam, and the light beam vertical with axis that the 3rd beam splitting chip (11) is divided into reflexes to the first bifocal lens (16) through the 5th catoptron (12);
What the 4th beam splitting chip (14) was divided into enters the first bifocal lens (16) with axis parallel light beam, and the light beam vertical with axis that the 4th beam splitting chip (14) is divided into reflexes to the first bifocal lens (16) through the 6th catoptron (13).
6. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 5, is characterized in that described femto-second laser (1) is titanium-doped sapphire femto-second laser.
7. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 6, is characterized in that described titanium-doped sapphire femto-second laser output pulse width is about 40fs, centre wavelength 800nm.
8. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 7, is characterized in that described optical parametric amplifier and OPA (8), selects the SHS configuration in TOPAS-800-fs-VIS.
9. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 8, it is characterized in that detecting the signal of 200-1100nm wavelength coverage by the HR4000CG-CN-NIR model spectrometer that described the first spectrometer (33) and the second spectrometer (34) adopt Ocean to produce.
10. a kind of CARS spectrum temperature measuring device based on bifocal lens according to claim 9, what it is characterized in that the first described ccd array detector (35) and the second ccd array detector (36) adopt is the TCD1304AP linear CCD array that Toshiba produces.
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| CN109030457A (en) * | 2018-09-20 | 2018-12-18 | 北京空间机电研究所 | A kind of dual-element cobasis body Raman probe |
| CN109856112A (en) * | 2017-11-30 | 2019-06-07 | 中国科学院大连化学物理研究所 | A kind of tomography scanned imagery apparatus based on CARS, detection system and method |
| CN112747837A (en) * | 2020-12-23 | 2021-05-04 | 华中科技大学 | Femtosecond CARS system for measuring gas phase temperature in MOCVD reaction cavity in real time |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856112A (en) * | 2017-11-30 | 2019-06-07 | 中国科学院大连化学物理研究所 | A kind of tomography scanned imagery apparatus based on CARS, detection system and method |
| CN109856112B (en) * | 2017-11-30 | 2020-05-22 | 中国科学院大连化学物理研究所 | CARS-based tomography imaging device, detection system and method |
| CN109030457A (en) * | 2018-09-20 | 2018-12-18 | 北京空间机电研究所 | A kind of dual-element cobasis body Raman probe |
| CN109030457B (en) * | 2018-09-20 | 2021-02-09 | 北京空间机电研究所 | Double-element common-matrix Raman probe |
| CN112747837A (en) * | 2020-12-23 | 2021-05-04 | 华中科技大学 | Femtosecond CARS system for measuring gas phase temperature in MOCVD reaction cavity in real time |
| CN112747837B (en) * | 2020-12-23 | 2021-10-29 | 华中科技大学 | Femtosecond CARS system for measuring gas phase temperature in MOCVD reaction cavity in real time |
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