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Femtosecond CARS (coherent anti-stokes Raman scattering) three-dimensional spectral detection system and method for study on molecular superfast dynamics

A spectral detection and dynamics technology, applied in the field of CARS three-dimensional spectral detection system, can solve the problems of complex detection operation, complex structure, poor stability, etc., and achieve the effect of simplifying detection operation, reducing height and improving stability

Active Publication Date: 2014-12-24
哈尔滨工业大学高新技术开发总公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The present invention solves the problem that the traditional CARS detection system has poor stability, complex structure, stray light has a great influence on signal detection, and the problem that the detection spectrum is a two-dimensional spectrum, and the application of the traditional CARS detection system to perform complex detection operations question

Method used

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  • Femtosecond CARS (coherent anti-stokes Raman scattering) three-dimensional spectral detection system and method for study on molecular superfast dynamics
  • Femtosecond CARS (coherent anti-stokes Raman scattering) three-dimensional spectral detection system and method for study on molecular superfast dynamics
  • Femtosecond CARS (coherent anti-stokes Raman scattering) three-dimensional spectral detection system and method for study on molecular superfast dynamics

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specific Embodiment approach 1

[0038] Specific implementation mode one: combine figure 1 Describe this embodiment, a femtosecond CARS three-dimensional spectral detection system for molecular ultrafast dynamics research, including: a femtosecond laser 1, a first time delay device 2, a second time delay device 3, and a third time delay device 4. Optical parametric amplifier 5, first aperture 6, second aperture 7, third aperture 8, fourth aperture 9, fifth aperture 10, first beam splitter 11, second beam splitter 12 , sample cell 13, spatial diaphragm 14, monochromator 15, photomultiplier tube 16, lock-in amplifier 17, first lens 18, second lens 19, first reflector 20, second reflector 21, third reflector mirror 22, fourth mirror 23, fifth mirror 24, sixth mirror 25, seventh mirror 26, eighth mirror 27, ninth mirror 28, tenth mirror 29, dichroic mirror 30 , computer 31 and optical chopper 32;

[0039] The first reflector 20, the fourth reflector 23, the fifth reflector 24, the sixth reflector 25, the seven...

specific Embodiment approach 2

[0054] Embodiment 2: The femtosecond laser 1 used in this embodiment is a titanium-doped sapphire femtosecond laser.

[0055] Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0056] Specific Embodiment Three: The titanium-doped sapphire femtosecond laser used in this embodiment adopts the titanium-doped sapphire femtosecond laser produced by Coherent Company, and its output pulse width is about 40 fs, and its center wavelength is 800 nm.

[0057] Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention relates to a femtosecond CARS (coherent anti-stokes Raman scattering) three-dimensional spectral detection system and method for study on molecular superfast dynamics and aims to solve the problems such that the traditional CARS detection system is poor in stability and complex in structure, and the influence of stray light upon signal detection. The system comprises a femtosecond laser, a first time delay unit, a second time delay unit, a third time delay unit, an optical parameter amplifier, a first diaphragm, a second diaphragm, a third diaphragm, a fourth diaphragm, a fifth diaphragm, a first beam splitter, a second beam splitter, a sample pool, a spatial diaphragm, a monochrometer, a photoelectric multiplier tube, a phase-locked amplifier, a first lens, a second lens, a first reflector, a second reflector, a third reflector, a fourth reflector, a fifth reflector, a sixth reflector, a seventh reflector, an eight reflector, a ninth reflector, a tenth reflector, a dichroscope, a computer and an optical chopper. The system and the method are applicable to spectral detection.

Description

technical field [0001] The invention relates to a CARS three-dimensional spectrum detection system and a detection method. Background technique [0002] Since the first laser was invented by humans in 1960, lasers have had a huge impact on human beings from scientific research to production and life. As a light source with high brightness, high monochromaticity and high directionality, laser has applications in many fields. For a long time, lasers have been developing in two directions, one is greater average power, and the other is shorter pulse width. For the latter, with the development of related technologies such as Q-switching and mode-locking, the width of laser pulses has been gradually shortened from the initial microsecond level to nanosecond, picosecond or even femtosecond level. Using related technologies such as high-order harmonics, femtosecond pulses can also be used to further generate attosecond-level pulses. Femtosecond pulse refers to a pulse with a pul...

Claims

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Application Information

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IPC IPC(8): G01J3/28
Inventor 夏元钦秦一凡杨兆辉王梓张盛刘斌赵阳
Owner 哈尔滨工业大学高新技术开发总公司
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