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A method for time-resolved pump detection of ultrashort single pulses using stepped windows

A technology of pulse time and pump detection, which is applied in the field of nonlinear optical physical mechanism and the system of measuring its optical physical parameters, can solve the problems of complex delay line structure and system error, achieve fast test speed and eliminate uncertain factors The overall effect of interference and test parameters

Active Publication Date: 2019-12-17
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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

Method used

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  • A method for time-resolved pump detection of ultrashort single pulses using stepped windows
  • A method for time-resolved pump detection of ultrashort single pulses using stepped windows
  • A method for time-resolved pump detection of ultrashort single pulses using stepped windows

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Embodiment 1

[0030] The method of realizing ultra-short single pulse time-resolved pump detection by using a step window, divides the laser output from the laser into a pump light path and a detection light path, and focuses the pump light path on the sample to be tested to generate nonlinearity; A stepped window is placed in the detection light path, with figure 1 is a schematic diagram of a time-delay ladder window; the detection light path is transmitted through the ladder window and is incident on the sample to be tested, and the CCD is placed near the sample to be tested to receive the probe light emitted from the sample; data processing is performed on the spot image collected by the CCD, The nonlinear absorption time characteristic curve of the sample to be tested is analyzed.

[0031] See attached figure 2As shown, the method of using step window to realize time-resolved pump detection of ultrashort single pulse is based on the detection optical path and the pump optical path. Th...

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PUM

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Abstract

The invention discloses a method for realizing ultrashort single-pulse time-resolved pump detection by using a stepped window. The laser output from a laser is divided into pump light and probe light, and the pump light is focused on a nonlinear sample through a lens to make it Non-linearity is generated; the probe light is transmitted through the stepped window to detect the change of the nonlinear sample induced by the pump light, and the image is received by the CCD; in the case of probe light with different time delays, the intensity of the probe light emitted from the sample The change reflects the distribution of the number of particles in the sample at different times, thereby determining the absorption cross section and lifetime of each energy level; the measurement system working according to the method of the present invention is very convenient to measure, without sample movement, and only needs one laser pulse to obtain The time-resolved pump-probe curve is very simple compared with the traditional pump-probe optical path; there is no need for a high-precision mobile platform in the traditional optical path to realize the time delay, and only one delay step window is needed to realize the time delay.

Description

technical field [0001] The invention belongs to the technical field of nonlinear photonic materials and nonlinear optical information processing, and specifically relates to a system for studying the nonlinear optical physical mechanism of materials and measuring the optical physical parameters thereof. 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 pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63
CPCG01N21/63
Inventor 杨俊义宋瑛林杨勇
Owner SUZHOU UNIV
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