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Femtosecond laser processing method and device for micro-nano structure of cladding on surface of optical fiber

A technology of femtosecond laser processing and micro-nano structure, which is applied in the direction of cladding optical fiber, micro-structured optical fiber, optical waveguide and light guide, etc., can solve the problems of limited deep processing capacity of micro-structure and significant thermal effect of micro-structure, etc., and achieve the purpose of suppressing thermal effect and improving Non-linear effect, effect of reducing energy density

Active Publication Date: 2021-12-03
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the existing optical fiber cladding microstructure processing, the microstructure deep processing capability is limited, and the thermal effect of the processed microstructure is significant, etc., the present invention provides a A femtosecond laser processing method for micro-nano structure cladding on the surface of an optical fiber, and a device for realizing the method is also provided

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  • Femtosecond laser processing method and device for micro-nano structure of cladding on surface of optical fiber

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[0032] In order to make the purpose, advantages and features of the present invention more clear, a femtosecond laser processing method and device for optical fiber surface cladding micro-nano structure proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that: the drawings are all in a very simplified form and use inaccurate proportions, which are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention; secondly, the structures shown in the drawings are often actual structures part.

[0033] A femtosecond laser processing method for optical fiber surface cladding micro-nano structure The specific realization principle is as follows: figure 1 As shown: after the femtosecond laser 2 passes through the focusing m...

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Abstract

The invention discloses a femtosecond laser processing method and device for a micro-nano structure of a cladding on the surface of an optical fiber. According to the method, femtosecond laser passing through a focusing microscope objective passes through a spherical aberration introducer to generate spherical aberration, so that paraxial focuses and non-paraxial focuses of the femtosecond laser form a plurality of focuses separated along an optical axis, the focuses form a light filament structure, the light filament structure processes a micro structure on the surface of the optical fiber, and the size of the micro structure is between several microns and hundreds of microns. According to the method, the positive correlation between a laser focal spot and the focal depth and the nonlinear effect caused by energy distribution along the optical axis are greatly improved, so that a micro structure with a large depth-diameter ratio can be generated on the surface of the optical fiber.

Description

technical field [0001] The invention belongs to the technical field of optical fiber processing, and in particular relates to a femtosecond laser processing method and device for micro-nano structure cladding on the surface of an optical fiber. Background technique [0002] Optical fiber is a medium for light transmission based on the total reflection mechanism of light. It can be divided into two types: quartz glass and single crystal fiber. Single crystal optical fiber capable of generating laser is a new type of one-dimensional functional crystal material. Compared with traditional glass optical fiber, it has narrow laser spectral line, high quantum efficiency, multi-function, high thermal conductivity, and good infrared transmission. , high damage threshold, and low nonlinear effects. Therefore, the superior performance of single crystal fiber makes it have great application prospects in high-power laser applications (high-power lasers, high-power laser weapons, etc.), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/0622G02B6/02
CPCB23K26/355B23K26/0624G02B6/02295
Inventor 李明李珣
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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