Coaxial non-angle pumping detection method and system

A technology of pump detection and included angle, applied in the direction of material excitation analysis, etc., can solve the problems of complex delay line structure and system error, and achieve the effect of convenient measurement, convenient signal reception, and reduced optical path requirements.

Active Publication Date: 2018-08-31
SUZHOU UNIV
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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 coaxi

Method used

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  • Coaxial non-angle pumping detection method and system
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  • Coaxial non-angle pumping detection method and system

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Embodiment 1

[0029] as attached figure 1As shown, a coaxial pump detection method with no included angle is based on the detection optical path 3 and the pump optical path 4. The pump optical path is composed of reflectors, rectangular prisms, and convex lenses. The reflective prisms can be translated back and forth to change the pumping path. The delay time of light; the detection light path is composed of a reflector, a baffle, a convex lens, a small hole, and a detector; the pump light path and the detection light path are simultaneously focused on the sample to be tested.

[0030] Use the beam splitter 2 to divide the laser pulse 1 into the detection optical path 3 and the pump optical path 4, the detection optical path 3 passes through the mirror 9 to change the direction, after the lens 10 and the convex lens 11 expand the beam, it is blocked by the baffle 12 coaxial with the beam. After light, the edge light beam passes through the pump light reflector 13, then passes through the co...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01N21/63
CPCG01N21/63
Inventor 杨俊义宋瑛林杨勇
Owner SUZHOU UNIV
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