Single-beam near-degenerate four-wave mixing microscope device and method

Abstract

The invention discloses a single-beam near-degenerate four-wave mixing microscope device and method, and the method comprises the steps: carrying out the dispersion compensation of a laser pulse transmitted by a Ti sapphire laser through a pair of prisms, cutting off the laser pulse at 781nm through an ultra-steep long-pass filter, reflecting the laser pulse through a dichroscope, and focusing thelaser pulse on a to-be-measured sample through an objective lens; a reflection signal on a to-be-detected sample is collected by the objective lens, sequentially penetrates through the dichroscope and the band-pass filter and then is guided into the first photomultiplier; transmission signals on a sample to be detected are gathered through the condensing lens and then are divided into a transmission light beam and a reflection light beam through the beam splitter, incident laser of the transmission light beam is filtered out through the first ultra-steep short-pass filter, and then the transmission light beam is focused through the lens and guided into the high-resolution integrated spectrograph to record spectral data. And the reflected light beam is reflected by the reflector, then filtered by the second ultra-steep short-pass filter and finally guided into the second photomultiplier for four-wave mixing imaging. The method has the advantages of being simple, cheap and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of nonlinear optical microscopy, and in particular relates to a single-beam near-degenerate four-wave mixing microscope device and method. Background technique [0002] In the process of four-wave mixing, when the probe wave and the pump light have the same frequency, that is, the frequency of the four columns of waves is the same, it is called degenerate four-wave mixing. In practical applications, the probe wave and the pump wave often have a certain frequency difference, and when their frequency difference is much smaller than any of the frequencies participating in the mixing, it is called a near-degenerate four-wave mixing process. [0003] The existing single-beam near-degenerate four-wave mixing microscope uses a femtosecond laser as a light source to output laser light. After passing through the pulse shaper, a part of the laser light with a relatively short wavelength is filtered out by a black baff...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a single-beam near-degenerate four-wave mixing microscope device and method for the above-mentioned deficiencies in the prior art. In order to solve the problems of the existing single-beam near-degenerate four-wave mixing experimental device, the problems of inconvenient use and high cost caused by the complex system and large volume, so as to further simplify the single-beam near-degenerate four-wave Mixing experimental device, the purpose of reducing costs

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