An experimental device for measuring photon echo spectra
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A photon echo and experimental device technology, which is applied in the field of experimental devices for measuring multidimensional spectra, can solve problems such as limited application range, difficult polarization control, and low accuracy, and achieve the effects of low cost, improved accuracy, and simple methods
Active Publication Date: 2017-11-03
HARBIN INST OF TECH
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[0006] In order to solve the problem of large system, high cost and limited application range of the existing active phase stabilization device in the two-dimensional electronic spectrum and the accuracy of the existing passive phase stabilization device to detect weak signals with low signal light intensity The problem of low height and difficult control of polarization
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specific Embodiment approach 1
[0038] Specific implementation mode one: combine figure 1 To describe this embodiment,
[0039] An experimental device for measuring photon echo spectrum, comprising:
[0040] Femtosecond laser 1, optical parametric amplifier 2, i.e. OPA2, attenuation sheet 3, first mirror 4, polarizer 5, first beam splitter 6, first time delay device 7, second time delay device 8, the first Three time delay devices 9, second mirror 10, third mirror 11, fourth mirror 12, first lens 13, diffraction grating 14, second lens 15, first pair of wedge prisms 16, second pair of wedge prisms 17. The third pair of wedge prisms 18, parabolic mirror 19, sample cell 20, spatial filter 21, concave mirror 22, ninth mirror 23, analyzer 24, first beam combining mirror 25, tenth mirror 26, Eleventh reflector 27, second beam combiner 28, third lens 29, spectrometer 30, CCD array detector 31, computer 32, second beam splitter 35, third beam splitter 36, fifth reflector 37 , the sixth reflector 38, the seventh ...
specific Embodiment approach 2
[0060] The femtosecond laser 1 described in this embodiment is a titanium-doped sapphire femtosecond laser.
[0061] Other devices and parameters are the same as in Embodiment 1.
specific Embodiment approach 3
[0062] The output pulse width of the titanium-doped sapphire femtosecond laser described in this embodiment is about 40 fs, and the center wavelength is 800 nm.
[0063] Other devices and parameters are the same as in the second embodiment.
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Abstract
An experimental device for measuring photon echo spectrum, relating to an experimental device for measuring multi-dimensional spectrum. In order to solve the problem of large system, high cost and limited application range of the existing active phase stabilization device in the two-dimensional electronic spectrum and the accuracy of the existing passive phase stabilization device to detect weak signals with low signal light intensity It is not high, and the polarization is difficult to control. The device of the present invention includes: a femtosecond laser, an optical parametric amplifier, an attenuation sheet, a reflector, a polarizer, a beam splitter, a time delay device, a lens, a diffraction grating, a pair of wedge prisms, a parabolic mirror, a sample pool, and a space diaphragm Filter, concave mirror, polarizer, beam combining mirror, spectrometer, CCD array detector, computer; the invention is suitable for detection of photon echo spectrum.
Description
technical field [0001] The invention relates to an experimental device for measuring multi-dimensional spectrum. Background technique [0002] Photon echo spectroscopy technology is developed from multi-dimensional nuclear magnetic resonance technology, which is a multi-dimensional nonlinear optical technology. Photon echo technology can study the detailed structural information of complex molecules as well as ultrafast dynamic processes. In double-pulse photon echo, the first ultrashort laser pulse with a pulse area of π / 2 is incident on the sample molecule, forming an optically coherent state between the electronic ground state and the electronic excited state of the sample molecule. Generally, the strength of the macroscopic electric polarization P can be used to describe this optically coherent state. After that, the electric polarization begins to decay rapidly, and the decay rate includes two parts: ultrafast and ultraslow. After the second ultrashort laser pulse ...
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