Coaxial non-angle pumping detection method and system

Abstract

The invention discloses a pumping light and detection light coaxial non-angle pumping detection method and system used for detecting optical nonlinearity. A laser beam is divided into two beams, one beam with strong light intensity is pumping light, one beam with weak light intensity is detection light, and the pumping light is focused on a to-be-measured non-linear sample by time delay, so as tomake the non-linear sample in a basic state produce non-linear absorption; the detection light passes through a concentric baffle and then is converged on the to-be-measured non-linear sample by a lens, the emergent pumping light is blocked by a second concentric baffle, and the detection light passes through the second baffle and then enters a detector completely; the distance between the bafflein front of the lens in the detection optical path and the lens and the distance between the baffle at the rear of the lens in the detection optical path and the lens conform to a lens imaging law, and the radius of the baffle in front of the lens is larger than that of a reflecting mirror of the pumping light, and the radius of the rear baffle can block all the pumping light and makes all the detection light pass through. The pumping light and detection light coaxial measurement material transient optical nonlinear absorption kinetics is achieved without polarizing films and optical filters.

Description

technical field [0001] The invention relates to a device for studying the nonlinear optical physical mechanism of materials and measuring its optical physical parameters, and belongs to the fields of nonlinear photonic materials and nonlinear optical information processing. Background technique [0002] With the rapid development of technologies in the fields of optical communication and optical information processing, the research on nonlinear optical 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 optical materials. Optical nonlinear measurement technology is one of the key technologies for studying nonlinear optical materials. It is very important to understand the optical nonlinear mechanism of materials and how to accurately determine the important physical parameters of materials for how ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the delay line structure of the mobile platform is complex and easy to introduce system errors in the traditional pump detection; to provide a pump detection method in which the pump light and the detection light are coaxial and have no angle, which is used for optical nonlinearity Material detection; use the coaxial pump light and probe light to more accurately determine the optical nonlinear mechanism of the material and accurately measure important nonlinear optical parameters of the material at the same time

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