Double-channel second-order nonlinear optical test system

Abstract

The invention discloses a double-channel second-order nonlinear optical test system which is used for testing the second-order nonlinear optical effects of materials. The system comprises a laser light source, a photic sheet, a sample rack, a focusing lens, a spectroscope, a first optical filter, a first photomultiplier, a second optical filter, a second photomultiplier, a signal receiving analyzer and a photophobic box. According to the intensities of frequency-doubled lasers and non-frequency-doubled lasers contained in optical signals generated by exciting samples by lasers and the relative intensity relationship thereof, the laser-induced optical signal lights after respectively passing through the first optical filter and the second optical filter are subjected to two-channel exploration by virtue of the first and second photomultipliers, then through carrying out comparison and analysis on signals generated through two-channel exploration, the qualitative and quantitative test on the second-order nonlinear optical effects of powder-monocrystal containing samples is realized. The double-channel second-order nonlinear optical test system is simple in structure, light, practical, and easy to operate, has the advantages of wide waveband application range, high response sensitivity, and the like; and by using the system, the qualitative and quantitative test on the second-order nonlinear optical effects of sample materials can be effectively realized, therefore, the system has the advantages of broad application prospect and high application value.

Description

technical field [0001] The invention relates to the development of an optical testing system and belongs to the technical field of spectroscopic instruments. Background technique [0002] Nonlinear optics (NLO for short) is an important branch of modern optics. It is a science that studies the nonlinear relationship between the response of matter and field strength under the action of strong light. These optical effects related to nonlinearity are called non-linear. Linear optical effect. After the advent of lasers, nonlinear optical effects have shown many novel physical phenomena, which are widely used in modern high-tech fields, such as optical communications, optical computers, laser radar, satellite ranging, laser precision machining, laser chemistry, and laser medicine. and far-reaching applications. [0003] Research and search for new high-performance nonlinear optical materials has become a research hotspot in the field of nonlinear optics. The second-order nonli...

AI Technical Summary

Problems solved by technology

This detection method using a single detector has the following problems and deficiencies: (1) each time the sample to be tested is detected, it is necessary to detect and compare one or more than two standard samples, the detection process is cumbersome and it is difficult to ensure that each Reproducibility of detection; (2) Doubled frequency light and non-frequency doubled light are difficult to distinguish

However, due to the use of a spectrometer combined with a CCD detector to detect frequency-doubling signals, this design scheme is bulky, complex in structure, and difficult to move. At the same time, it is expensive. A complete system will cost about 1 million yuan to build, making it difficult to achieve commercialization. to make common

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