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Pumping detecting method based on 4f phase coherent imaging

A pump-detection and phase-coherent technology, which is applied in the field of nonlinear photonics materials and nonlinear optical information processing, can solve problems such as deviation and achieve the effect of a simple theoretical model

Inactive Publication Date: 2008-01-23
SUZHOU UNIV
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Problems solved by technology

In the above-mentioned measurement method based on 4f phase coherent imaging, due to the neglect of the time item, the result will have a relatively large deviation

Method used

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  • Pumping detecting method based on 4f phase coherent imaging
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  • Pumping detecting method based on 4f phase coherent imaging

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Embodiment 1

[0029]Embodiment 1: Referring to Figure 1, a method for measuring optical nonlinear parameters of optical functional materials based on a 4f system is based on a detection optical path and a pumping optical path, and the pumping optical path is composed of a mirror, a right-angle prism, and a convex lens , the rectangular prism can move up and down to change the delay time of the pump light; the detection light path is composed of a reflector, a convex lens, a diaphragm, a light intensity attenuator, and a CCD camera; the pump light path and the detection light path (simultaneously) focus on the same sample to be tested position.

[0030] A beam splitter 2 is used to divide the laser pulse 1 into a detection optical path 3 and a pump optical path 4. The detection optical path 3 passes through a mirror 9 to change its direction, is expanded and collimated by the first lens 10 and the second lens 11, and passes through the phase diaphragm 12. After that, the convex lens 13 is fo...

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Abstract

The invention discloses a pump detection method based on 4f phase coherence images. Wherein, the laser output by a laser is divided into a pumping light and detecting light; the pumping light is focused after a time-delay platform on a non-linear sample to generate non linearity; the detecting light detects the change in the pumping-light induced non-linear sample, and is recorded by a CCD. By different time delays in the pumping light, the change in the phase and strength of the detecting light emitted from the sample reflects the distribution of particles in the sample at different time periods, so that the absorption sections and service lives and refractivity volume of each energy level are determined. The invention is of simple optic path, the theoretic processing is simple, the single-phase measurement reduces the optic accumulation; the absorption and refracting pumping are completed at the same time without individual measurements, and the size and symbol of non-linear absorption and refraction can be measured concurrently, the sensitivity on the random fluctuation of the laser beam is low, and the measurement results are accurate.

Description

technical field [0001] The invention relates to a measurement method of photonics nonlinear materials, in particular to a pump detection method based on 4f phase coherent imaging, which is used to study the characteristics of nonlinear absorption and refraction with respect to time, and belongs to nonlinear photonics materials and non-linear The field of linear optical information processing. Background technique [0002] With the rapid development of technologies in the fields of optical communication and optical information processing, research on nonlinear photonic materials is becoming increasingly important. The realization of functions such as optical logic, optical memory, optical transistor, optical switch and phase complex conjugation mainly depends on the research progress of nonlinear photonic materials. Optical nonlinear measurement technology is one of the key technologies to study nonlinear photonic materials. At present, the commonly used methods for measuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/45G01N21/01
Inventor 宋瑛林李云波王玉晓杨俊义
Owner SUZHOU UNIV
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