CN108534896B - Femtosecond time resolution pumping and broadband time resolution CARS two-in-one spectrometer system - Google Patents
Femtosecond time resolution pumping and broadband time resolution CARS two-in-one spectrometer system Download PDFInfo
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- CN108534896B CN108534896B CN201810186285.0A CN201810186285A CN108534896B CN 108534896 B CN108534896 B CN 108534896B CN 201810186285 A CN201810186285 A CN 201810186285A CN 108534896 B CN108534896 B CN 108534896B
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- 238000005086 pumping Methods 0.000 title claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000001228 spectrum Methods 0.000 claims abstract description 12
- 230000001052 transient effect Effects 0.000 claims abstract description 12
- 239000013307 optical fiber Substances 0.000 claims description 33
- 239000000523 sample Substances 0.000 claims description 29
- 239000004038 photonic crystal Substances 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 21
- 239000000835 fiber Substances 0.000 claims description 19
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000000862 absorption spectrum Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910000737 Duralumin Inorganic materials 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 5
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- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 230000010287 polarization Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2889—Rapid scan spectrometers; Time resolved spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
Abstract
The application discloses a femtosecond time resolution pumping and broadband time resolution CARS two-in-one spectrometer system which comprises an optical flat plate, a first light source inlet, a second light source inlet, a first light path system, a second light path system and a spectrum detection system. The application relates to the technical field of spectrometers, in particular to a femtosecond time resolution pumping and broadband time resolution CARS two-in-one spectrometer system, which realizes modularization of the spectrometer by utilizing an optical flat plate and various optical components, has low cost and simple structure, combines a femtosecond time resolution transient absorption spectrometer with a broadband time resolution CARS spectrometer, is more convenient for operators to adjust, and is easy to popularize and apply.
Description
Technical Field
The application relates to the technical field of spectrometers, in particular to a femtosecond time resolution pumping and broadband time resolution CARS two-in-one spectrometer system.
Background
The femtosecond time resolution transient absorption spectrometer adopts pumping light pulse to pump sample molecules to an excited state, and the law of the change of optical parameters of the excited sample along with delay time is researched by recording the change of light intensity of the detection light which arrives later before and after passing through the sample. The femtosecond time resolution transient absorption spectrum technology is a powerful tool for researching the excited state energy level structure and the excited state capacity relaxation process of substances, and has wide application in the fields of physics, chemistry, materials, biology and the like, such as photophysical processes, photochemical reactions, biochemical processes, photocatalytic reactions and the like.
The CARS spectrometer reflects the molecular structure and the property of the scattering substance by recording the information such as the frequency, the polarization, the intensity and the like of the new spectrum component in the interaction process of light and the substance molecules, so that the sample molecules can be effectively identified and positioned without introducing exogenous markers. Furthermore, the broadband CARS spectrometer can excite a plurality of Raman vibration bonds in sample molecules at the same time, so that complete CAR spectrum information is obtained, and researches on the structure, the function and the like of different biological molecules in living cells are further developed, so that the broadband CARS spectrometer has great significance for development of life science and cell molecular biology.
The existing femtosecond time resolution pump detection spectrometer and the broadband time resolution CARS spectrometer are independent optical systems, so that the corresponding laser spectrum system is required to be independently equipped and the corresponding optical system is required to be built. In the research of photophysics, photochemical reaction, biomedicine and the like, the femtosecond time resolution transient absorption spectrometer and the broadband time resolution CARS spectrometer are frequently used, and the femtosecond time resolution pump detection spectrometer and the broadband time resolution CARS spectrometer are built at the moment, so that the operation and maintenance of a professional experimenter are needed, and the system is expensive, huge and complex, and is not beneficial to the popularization and application of the femtosecond transient absorption spectroscopy technology and the broadband CARS spectroscopy technology.
Disclosure of Invention
In order to solve the technical problems, the application aims to provide a femtosecond time resolution pumping and broadband time resolution CARS two-in-one spectrometer system with low cost and simple structure, which is easy to popularize and apply.
The technical scheme adopted by the application is as follows: a two-in-one spectrometer system of femtosecond time resolution pump and broadband time resolution CARS comprises an optical flat plate, a first light source inlet, a second light source inlet, a first light path system, a second light path system and a spectrum detection system,
all optical components in the spectrometer system are arranged on the optical flat plate;
the first light path system comprises a first plane reflecting mirror, a second plane reflecting mirror, a first half-wave plate, a first lens, a photonic crystal fiber, a second lens, a third plane reflecting mirror, a prism pair, a lifting mirror, a beam splitter and a fifth plane reflecting mirror;
the first light source inlet is used as a first laser inlet, the first laser is reflected by a first plane reflector and a second plane reflector, then is converged to one end of the photonic crystal fiber through a first half-wave plate by a first lens, the photonic crystal fiber converts the first laser into supercontinuum laser, the supercontinuum laser is emitted from the other end of the photonic crystal fiber, is collimated and output to a prism pair by a second lens, is output to a lifting mirror through the prism pair to lift a light beam, and is transmitted to a third plane reflector again by the prism pair and is reflected to a beam splitter to be divided into first reflected light and first transmitted light;
the second light path system comprises an optical switch, a sixth plane reflecting mirror, a seventh plane reflecting mirror, a second half-wave plate, a light delay device, an eighth plane reflecting mirror and a dichroic mirror; the second light source inlet is used as a second laser inlet, the second laser is reflected to the second half-wave plate through the sixth plane mirror and the seventh plane mirror after passing through the optical switch, enters the light delay device after passing through the second half-wave plate, and the second laser emitted by the light delay device is reflected to the dichroic mirror through the eighth plane mirror;
the spectrometer system further comprises a first objective lens and a second objective lens, wherein the first transmitted light is reflected to a dichroic mirror through the fifth plane reflecting mirror, passes through the dichroic mirror and the first objective lens and then reaches the sample to be detected, the second laser is reflected by the dichroic mirror and then reaches the sample to be detected through the first objective lens, the dichroic mirror is used for combining the first transmitted light and the second laser, and the second objective lens is used for collecting the laser passing through the sample to be detected;
the spectrum detection system comprises a light filtering device, a spectrometer, a first adapter, a second adapter, a first conduction optical fiber and a second conduction optical fiber, wherein first reflected light reflected by the beam splitter reaches the spectrometer through the first adapter and the first conduction optical fiber, and laser passing through a sample to be detected is collected by the second objective and then injected into the second adapter through the light filtering device, and reaches the spectrometer through the second adapter and the second conduction optical fiber;
the optical filtering device comprises a switchable long-wave pass filter set and a short-wave pass filter set, when the long-wave pass filter set is adopted for filtering, signals collected by the spectrometer are femtosecond time resolution transient absorption spectrums, and when the short-wave pass filter set is adopted, signals collected by the spectrometer are broadband time resolution CARS spectrums.
As a further improvement of the above solution, the light panel is made of stainless steel material or duralumin material.
As a further improvement of the above, the first lens is an aspherical mirror.
As a further improvement of the above solution, the second lens is a broadband achromatic double cemented lens.
As a further improvement of the above solution, the photonic crystal fiber is an all-positive-dispersion photonic crystal fiber.
As a further improvement of the above solution, the prism pair is a dispersion compensating prism pair, and the prism pair includes a first prism and a second prism disposed in parallel.
As a further improvement of the scheme, the optical filtering device further comprises an optical filtering rotating wheel, and the optical filtering rotating wheel is provided with the long-wave pass optical filtering sheet set and the short-wave pass optical filtering sheet set and is used for switching the long-wave pass optical filtering sheet set and the short-wave pass optical filtering sheet set to enter the light passing position.
As a further improvement of the above solution, the light delay means comprise a horizontal moving stage and two plane mirrors perpendicular to each other.
As a further improvement of the above-described solution, when the spectrometer system is used as a femtosecond time-resolved pump spectrometer, the first laser light is converted into a supercontinuum laser light as a probe light via the photonic crystal fiber, and when the spectrometer system is used as a broadband time-resolved CARS spectrometer, the first laser light is converted into a supercontinuum laser light as a pump light and stokes light via the photonic crystal fiber.
As a further improvement of the above-described solution, the second laser light is used as a pump light when the spectrometer system is used as a femtosecond time-resolved pump spectrometer, and the second laser light is used as a probe light when the spectrometer system is used as a broadband time-resolved CARS spectrometer.
The beneficial effects of the application are as follows:
the two-in-one spectrometer system of the femtosecond time resolution pump and the broadband time resolution CARS utilizes an optical flat plate and various optical components, realizes modularization of the spectrometer, has low cost and simple structure, combines the femtosecond time resolution transient absorption spectrometer and the broadband time resolution CARS spectrometer, is more convenient for operators to adjust, and is easy to popularize and apply.
Drawings
The following is a further description of embodiments of the application, taken in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of a two-in-one spectrometer system of a femtosecond time-resolved pump and broadband time-resolved CARS of the present application;
fig. 2 is a schematic diagram of the switching of the femtosecond resolved pump spectrometer and the broadband time resolved CARS spectrometer of the present application.
Wherein, 1-optical plate; 2-a first light source inlet; 3-a second light source inlet; 4-a sample to be detected; m1-a first plane mirror; m2-a second planar mirror; m3-a third plane mirror; m4-lifting mirror; m5-a fifth plane mirror; m6-sixth plane mirror; m7-seventh plane mirror; m8-eighth plane mirror; h1-a first half-wave plate; h2-a second half-wave plate; l1-a first lens; l2-a second lens; a1-photonic crystal fiber; p1-prism pairs; BS-beam splitter; DM-dichroic mirrors; o1-a first objective lens; o2-second objective; an OS optical switch; delay-ray Delay device; FW-filter means; d1—a first adapter; d2—a second adapter; f1-a first conductive optical fiber; f2-a second conductive optical fiber; spec-spectrometer.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
Fig. 1 is a schematic structural diagram of a two-in-one spectrometer system of a femtosecond time resolution pump and a broadband time resolution CARS of the application, referring to fig. 1, the two-in-one spectrometer system of the application comprises an optical flat plate 1, a first light source inlet 2, a second light source inlet 3, a first light path system, a second light path system and a spectrum detection system, wherein all optical components in the spectrometer system are arranged on the optical flat plate 1 and are all installed at a determined position to make the two-in-one spectrometer system modularized, and in the embodiment, the optical flat plate 1 is made of stainless steel material or hard aluminum material.
Specifically, the first optical path system includes a first plane mirror M1, a second plane mirror M2, a first half-wave plate H1, a first lens L1, a photonic crystal optical A1, a second lens L2, a third plane mirror M3, a prism pair P1, a lifting mirror M4, a beam splitter BS and a fifth plane mirror M5, where the first light source inlet 1 is used as a first laser inlet, the first plane mirror M1 and the second plane mirror M2 are placed parallel to each other and form an angle of 45 ° with the horizontal plane, the first laser adopts a femtosecond laser pulse, the first laser passes through the first plane mirror M1 and the second plane mirror M2 and is reflected, then passes through the first half-wave plate H1, the first half-wave plate H1 is used to adjust the polarization state of the incident first laser, and then is converged to one end of the photonic crystal optical A1 through the first lens L1, in this embodiment, the first lens L1 is an aspherical mirror is used to focus the incident first laser and inject the first laser into the photonic crystal optical A1, the photonic crystal optical fiber A1 is a perfect dispersive optical fiber, when the photonic crystal optical fiber A1 is a perfect dispersive optical fiber, the first laser is used to produce a perfect optical fiber, the optical fiber is converted to the first laser beam, the optical fiber is transmitted to the second optical fiber is converted to the first optical fiber P2, and the optical fiber P2 passes through the first optical fiber P2, and the optical fiber P2 is converted to the optical fiber P2, and the optical fiber is then is converted to the optical fiber P2, and the optical fiber is continuously passes through the second optical fiber P2, and the optical fiber is converted to the optical fiber P.
In this embodiment, preferably, the prism pair P1 is a dispersion compensating prism pair, including a first prism and a second prism disposed parallel to each other, and the prism pair P1 is used for performing dispersion compensation on the supercontinuum laser.
Specifically, the second optical path system includes an optical switch OS, a sixth plane mirror M6, a seventh plane mirror M7, a second half-wave plate H2, a light Delay device Delay, an eighth plane mirror M8, and a dichroic mirror DM, where the second light source inlet 3 is used as a second laser inlet, the second laser uses a femto-second laser pulse with tunable wavelength, after the second laser passes through the optical switch OS, the second laser is reflected to the second half-wave plate H2 through the sixth plane mirror M6 and the seventh plane mirror M7, enters the light Delay device Delay after passing through the second half-wave plate H2, and the second laser emitted by the light Delay device Delay is reflected to the dichroic mirror DM through the eighth plane mirror M8, where the eighth plane mirror M8 is perpendicular to the dichroic mirror DM, the dichroic mirror DM and the eighth plane mirror M8 form an angle of 45 ° with the horizontal plane, in this embodiment, specifically, the light Delay device Delay includes a horizontal moving table and two perpendicular plane mirrors or a hollow retroreflector, and the two plane mirrors form an angle of 45 ° with the horizontal plane mirror.
The spectrometer system further comprises a first objective lens O1 and a second objective lens O2, a fifth plane reflecting mirror M5 and a beam splitter BS are arranged in parallel, the fifth plane reflecting mirror M5 and the beam splitter BS form an angle of 45 degrees with the horizontal plane, a dichroic mirror DM and the fifth plane reflecting mirror M5 are mutually perpendicular, and first transmitted light is reflected to the dichroic mirror DM through the fifth plane reflecting mirror M5 and then reaches a sample 4 to be measured through the dichroic mirror and the first objective lens O1; the second laser beam is reflected by the dichroic mirror DM and then reaches the sample 4 to be measured through the first objective lens O1, the dichroic mirror DM is used for combining the first transmitted light and the second laser beam, so that the two laser beams are completely overlapped in space, and the second objective lens collects the laser beam passing through the sample 4 to be measured.
Specifically, the light detection system includes a filtering device FW, a spectrometer Spec, a first adapter D1, a second adapter D2, a first conductive optical fiber F1 and a second conductive optical fiber F2, the first reflected light of the lifting beam reflected by the beam splitter BS reaches the spectrometer Spec through the first adapter D1 and the first conductive optical fiber F1, and after the second objective O2 collects the laser light passing through the sample 4 to be detected, the laser light is injected into the second adapter D2 through the filtering device FW, and reaches the spectrometer Spec through the second adapter D2 and the second conductive optical fiber F2. In this embodiment, the filter device FW includes a switchable long-wave pass filter set and a short-wave pass filter set, where the long-wave pass filter set is used to filter out the femtosecond pulse laser, and the short-wave pass filter set is used to filter out the femtosecond pulse laser and the supercontinuum; when the long-wave pass filter set is adopted for filtering, the signal acquired by the spectrometer Spec is a femtosecond time resolution transient absorption spectrum, and when the short-wave pass filter set is adopted, the signal acquired by the spectrometer Spec is a broadband time resolution CARS spectrum. Specifically, the light filtering device FW further comprises a light filtering wheel, and the light filtering wheel is provided with a long-wave pass filter set and a short-wave pass filter set for switching the long-wave pass filter set and the short-wave pass filter set to enter the light passing position.
Fig. 2 is a schematic switching diagram of the femtosecond resolution pump spectrometer and the broadband time resolution CARS spectrometer according to the present application, and referring to fig. 2, when the spectrometer system is used as the femtosecond time resolution pump spectrometer, the optical switch works to make the odd number of laser pulses pass through and the even number of laser pulses be blocked, so as to improve the signal to noise ratio of the transient absorption spectrum. The first laser adopts femtosecond laser pulse, the femtosecond laser pulse is converted into supercontinuum laser through a total positive dispersion photonic crystal fiber, after dispersion compensation treatment is carried out on the supercontinuum laser through a prism, the supercontinuum laser is divided into first transmission light and first reflection light through a beam splitter, the first transmission light is used as detection light, the first reflection light is used as reference light, the second laser adopts tunable femtosecond laser pulse, the tunable femtosecond laser pulse is used as pumping light, a light delay device drives two reflectors or hollow retroreflectors which are perpendicular to each other to move leftwards, so that the pumping light and the detection light generate a certain time delta t delay (namely, the second laser reaches a sample to be detected after reaching the sample to be detected firstly), the detection light after passing through the sample to be detected filters the pumping light through a long-wave pass filter on a filter runner, and the generated femtosecond time resolution transient absorption spectrum signal is detected by a spectrometer.
When the spectrometer system is used as a broadband time resolution CARS spectrometer, the first laser adopts femtosecond laser pulses, the femtosecond laser pulses are converted into supercontinuum laser through an all-positive-dispersion photonic crystal fiber, the supercontinuum laser is simultaneously used as pumping light and Stokes light after being subjected to prism dispersion compensation treatment, the second laser adopts tunable femtosecond laser pulses, the tunable femtosecond laser pulses are used as detection light, a light delay device drives two reflectors or hollow retroreflectors which are perpendicular to each other to move rightwards, a certain time delta t delay is generated among the pumping light, the Stokes light and the detection light (namely, the supercontinuum laser reaches a sample to be detected after reaching the sample to be detected firstly, the supercontinuum laser is collected through a second objective and then filtered by a shortwave pass filter on a filter runner, and the supercontinuum laser and the detection light are filtered by the supercontinuum laser after the supercontinuum laser reaches the sample to be detected after the sample to be detected.
The two-in-one spectrometer system of the femtosecond time resolution pump and the broadband time resolution CARS utilizes an optical flat plate and various optical components, realizes modularization of the spectrometer, has low cost and simple structure, combines the femtosecond time resolution transient absorption spectrometer and the broadband time resolution CARS spectrometer, is more convenient for operators to adjust, and is easy to popularize and apply.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiment, and one skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the application, and the equivalent modifications or substitutions are included in the scope of the present application as defined in the appended claims.
Claims (10)
1. The two-in-one spectrometer system is characterized by comprising an optical flat, a first light source inlet, a second light source inlet, a first light path system, a second light path system and a spectrum detection system, wherein all optical components in the spectrometer system are arranged on the optical flat;
the first light path system comprises a first plane reflecting mirror, a second plane reflecting mirror, a first half-wave plate, a first lens, a photonic crystal fiber, a second lens, a third plane reflecting mirror, a prism pair, a lifting mirror, a beam splitter and a fifth plane reflecting mirror;
the first light source inlet is used as a first laser inlet, the first laser is reflected by a first plane reflector and a second plane reflector, and then is converged to one end of the photonic crystal fiber through a first half wave plate by a first lens, the photonic crystal fiber converts the first laser into supercontinuum laser, the supercontinuum laser is emitted from the other end of the photonic crystal fiber, is collimated by a second lens and is output to a prism pair,
the light beam is output to the lifting mirror through the prism pair to lift, and the lifting light beam passes through the prism pair again and is transmitted to the third plane reflecting mirror, and is reflected to the beam splitting mirror to be divided into first reflected light and first transmitted light;
the second light path system comprises an optical switch, a sixth plane reflecting mirror, a seventh plane reflecting mirror, a second half-wave plate, a light delay device, an eighth plane reflecting mirror and a dichroic mirror;
the second light source inlet is used as a second laser inlet, the second laser is reflected to the second half-wave plate through the sixth plane mirror and the seventh plane mirror after passing through the optical switch, enters the light delay device after passing through the second half-wave plate, and the second laser emitted by the light delay device is reflected to the dichroic mirror through the eighth plane mirror;
the spectrometer system further comprises a first objective lens and a second objective lens, wherein the first transmitted light is reflected to a dichroic mirror through the fifth plane reflecting mirror, passes through the dichroic mirror and the first objective lens and then reaches the sample to be detected, the second laser is reflected by the dichroic mirror and then reaches the sample to be detected through the first objective lens, the dichroic mirror is used for combining the first transmitted light and the second laser, and the second objective lens is used for collecting the laser passing through the sample to be detected;
the spectrum detection system comprises a light filtering device, a spectrometer, a first adapter, a second adapter, a first conduction optical fiber and a second conduction optical fiber, wherein first reflected light reflected by the beam splitter reaches the spectrometer through the first adapter and the first conduction optical fiber, and laser passing through a sample to be detected is collected by the second objective and then injected into the second adapter through the light filtering device, and reaches the spectrometer through the second adapter and the second conduction optical fiber;
the optical filtering device comprises a switchable long-wave pass filter set and a short-wave pass filter set, when the long-wave pass filter set is adopted for filtering, signals collected by the spectrometer are femtosecond time resolution transient absorption spectrums, and when the short-wave pass filter set is adopted, signals collected by the spectrometer are broadband time resolution CARS spectrums.
2. The two-in-one spectrometer system of claim 1, wherein the optical plate is a stainless steel material or a duralumin material.
3. The two-in-one spectrometer system of claim 2, wherein the first lens is an aspherical mirror.
4. A femtosecond time resolved pump and broadband time resolved CARS two-in-one spectrometer system according to claim 3 wherein said second lens is a broadband achromatic double cemented lens.
5. The two-in-one spectrometer system of femtosecond time resolved pumping and broadband time resolved CARS of claim 4 wherein said photonic crystal fiber is a fully positively dispersive photonic crystal fiber.
6. The two-in-one spectrometer system of claim 5, wherein the prism pair is a dispersion compensating prism pair comprising a first prism and a second prism disposed in parallel.
7. The two-in-one spectrometer system of claim 6, wherein the filter device further comprises a filter wheel, and the filter wheel is provided with a long-wave pass filter set and a short-wave pass filter set for switching the long-wave pass filter set and the short-wave pass filter set into a light passing position.
8. The two-in-one spectrometer system of claim 7, wherein the light delay means comprises a horizontal stage and two planar mirrors that are perpendicular to each other.
9. The two-in-one femtosecond time resolved pump and broadband time resolved CARS spectrometer system according to any one of claims 1 to 8, wherein the first laser light is converted into supercontinuum laser light as probe light via the photonic crystal fiber when the spectrometer system is used as a femtosecond time resolved pump spectrometer and into supercontinuum laser light as pump light and stokes light via the photonic crystal fiber when the spectrometer system is used as a broadband time resolved CARS spectrometer.
10. The two-in-one spectrometer system of any of the claims 9, wherein the second laser is used as pump light when the spectrometer system is used as a femtosecond time resolved pump spectrometer and as probe light when the spectrometer system is used as a broadband time resolved CARS spectrometer.
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| CN111999278B (en) * | 2020-07-13 | 2023-11-03 | 北京工业大学 | Ultrafast time-resolved transient reflected light, transmitted light and related Raman spectrum imaging system |
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