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Method for measuring optical nonlinearity of material based on monopulse and single beam

A nonlinear, single-beam technology, applied in the field of optical nonlinearity of measuring materials, can solve problems such as easily damaged materials, and achieve the effects of reducing measurement costs, convenient measurement methods, and comprehensive test parameters.

Inactive Publication Date: 2009-09-16
SUZHOU UNIV
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Problems solved by technology

Like the traditional Z-scan, this measurement method also requires the sample to move in the direction of laser propagation, requires multiple laser excitations, and is easy to damage the material

Method used

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  • Method for measuring optical nonlinearity of material based on monopulse and single beam
  • Method for measuring optical nonlinearity of material based on monopulse and single beam
  • Method for measuring optical nonlinearity of material based on monopulse and single beam

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Embodiment 1

[0024] Embodiment one: see attached figure 2 As shown, a method for measuring nonlinear parameters of functional materials with a single pulse of a phase object, the optical path is composed of a phase object, a beam splitter, a convex lens, a small hole, and a detector; the pulse laser is focused on the sample to be tested.

[0025] After the laser pulse 1 passes through the phase object 2, it is divided into two beams of light by the beam splitter 3. The energy of the monitoring light is received by the first detector 4, and the other beam of light is focused on the sample 6 by the convex lens 5. The transmitted beam The second beam splitter 7 is divided into two beams, one beam is converged by the convex lens 8 and directly received by the second detector 9 , and the other beam is received by the third detector 11 after passing through the small hole 10 .

[0026] In this embodiment, the laser beam is a 532nm laser after frequency doubling of a Nd:YAG laser (Ekspla, PL2143...

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Abstract

The invention discloses a method for measuring the optical nonlinearity of a material based on monopulse and single beam. A phase object is arranged in a light path in front of a lens of detecting light; and under the action of the monopulse, the nonlinear absorption and nonlinear refraction coefficient of the material are determined by measuring the nonlinear penetration rates of an open pore and a far field pore. A measurement system operates according to the method of the invention has the advantages of simple light path, simple data processing, monopulse measurement, no sample movement, synchronous measurement of the size and symbols of the nonlinear absorption and the nonlinear refraction coefficient, accurate measurement result and great reduction in measurement cost.

Description

technical field [0001] The invention relates to a method for measuring optical nonlinearity of materials, which belongs to the field 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. Commonly used measurement methods include Z-scan, 4f system coherent imaging technology, Mach-Zehnder interferometry, four-wave mixing, third harmonic nonlinear interferometry, ellipsometry, phase object Z-scan, etc. Among them, ...

Claims

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Application Information

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IPC IPC(8): G01N21/59G01N21/39G01N21/41
Inventor 宋瑛林杨俊义李常伟金肖税敏
Owner SUZHOU UNIV
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