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Nonlinear optical absorption cross section measuring method

A nonlinear optics and nonlinear absorption technology, applied in the field of nonlinear optics and optical detection, can solve the problems of difficulty in research and application, low efficiency, etc., and achieve the effect of automating the measurement process, improving the coupling efficiency, and improving the measurement sensitivity.

Active Publication Date: 2020-06-02
WANXIN OPTICAL GRP +1
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Problems solved by technology

At present, most measurement methods can only measure one of degenerate two-photon absorption or non-degenerate two-photon absorption, and the efficiency is low. They can only measure point by point at a single wavelength, which brings great benefits to related research and applications. big difficulty

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Embodiment Construction

[0070] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0071] Such as figure 1 as shown, figure 1 It is an optical path structure diagram of an embodiment of a nonlinear optical pumping and detecting device realized by the present invention. The device includes a main optical path, a non-degenerate detection system, a non-degenerate pump system, a degenerate detection system, and a referenc...

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Abstract

The invention discloses a nonlinear optical absorption cross section measuring method. According to the invention, degenerate and non-degenerate nonlinear absorption section spectra can be measured atthe same time. The measurement process is automatic, efficient and rapid. According to the invention, the working wave band is from 380nm to near-infrared 1064nm, and the nonlinear performance measurement of the super-continuum wide spectrum can be realized. A zoom optical system with a large entrance pupil diameter is used as a weak signal acquisition lens, so that weak signals can be effectively extracted from background noise; the root-mean-square diameter of an image point on the axis of the zoom optical system is 100-150 micrometers, and the divergence angle 2alpha of the image point onthe axis is 30.6 degrees, so that optical fiber coupling conditions are well matched, and the coupling efficiency of spatial light coupled into optical fibers is improved; and the system measurement sensitivity is greatly improved.

Description

technical field [0001] The invention relates to a method for measuring a nonlinear optical absorption cross section, belonging to the fields of nonlinear optics and optical detection. Background technique [0002] With the rapid development of technologies such as optical communication and optical information processing, the research on nonlinear optical materials is becoming increasingly important. Nonlinear optical materials have obtained a large number of practical applications in the fields of optical switches, all-optical devices, high-speed optoelectronic devices, high-power laser devices, laser protection, and optical limiting. The study of optical nonlinearity of materials is currently a research hotspot in materials science and related fields. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39G01N21/25G01N21/31
CPCG01N21/39G01N21/255G01N21/31G01N2021/3196Y02E30/30
Inventor 周志强丛嘉伟佟艳群符永宏任乃飞
Owner WANXIN OPTICAL GRP
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