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- W2070790745 abstract "After the nonlinear optical phenomena were discovered, people began to research the techniques to detect the optical nonlinearities of materials. In this paper, a new optical nonlinear measurement technique-4<i>f</i> coherent imaging system is recommended. The system has many advantages: single shot real-time measurement, simple experimental apparatus, high sensitivity, being able to detect the magnitude and sign of both nonlinear absorption and refraction at the same time, low requirement of beam spatial distribution, and so on. This paper introduces the theory of the 4<i>f</i> system and makes a detailed review and expounds development and application of the 4<i>f</i> coherent image system. The nerve of the experiment is improving the phase diaphragm. The shape of the diaphragm from the double-slits to the small rectangular object, and transition to a circular aperture, finally forming a circular phase diaphragm, which is a circular aperture in the center add a phase object. Following these diaphragm changes, the sensitivity of the system is greatly improved. The latest developments of the system are series-wound double 4<i>f</i> coherent imaging technique and the time-resolved pump-probe system based on NIT-PO. The time-resolved pump-probe system based on NIT-PO can be used to measure the dynamic characteristics of excited states nonlinear absorption and refraction." @default.
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- W2070790745 date "2009-07-03" @default.
- W2070790745 modified "2023-10-16" @default.
- W2070790745 title "Development of a nonlinear optical measurement-4 coherent imaging system" @default.
- W2070790745 doi "https://doi.org/10.1117/12.836600" @default.
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