Device and method for generating columnar vector beams in optical fiber by utilizing electrically-controlled tunable optical grating

A kind of optical fiber and vector technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as the period of squeezed gratings cannot be adjusted accurately, the coupling efficiency is low, and the lack of wavelength tunable characteristics

Active Publication Date: 2015-12-09
NORTHWESTERN POLYTECHNICAL UNIV
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to precisely adjust the angle between the spatial Gaussian beam and the fiber end face, so the coupling efficiency is relatively low, so the conversion efficiency of the columnar vector beam is very low, and it is easy to excite other modes in the fiber core, which

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for generating columnar vector beams in optical fiber by utilizing electrically-controlled tunable optical grating
  • Device and method for generating columnar vector beams in optical fiber by utilizing electrically-controlled tunable optical grating
  • Device and method for generating columnar vector beams in optical fiber by utilizing electrically-controlled tunable optical grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0021] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a device and a method for generating columnar vector beams in optical fiber by utilizing an electrically-controlled tunable optical grating. By means of the linear polarization characteristic of the electrically-controlled tunable optical grating, efficient coupling between a linear polarization vector basic mode in a fiber core and TM01 and TE01 modes can be realized, and a columnar vector light field with strict radial and angular polarization characteristics can be generated. Complete coupling between the linear polarization vector basic mode and the columnar vector light field can be realized by optimizing the refractive index modulation degree of the electrically-controlled tunable optical grating. Columnar vector light can be generated in different wavelength positions of the optical fiber conveniently by adjusting and modulating the period of the electrically-controlled tunable optical grating. The adopted device is simple and has high columnar vector light field generation efficiency, the generated columnar vector light beams have high mode purity, meanwhile, different radial and angular vector light fields can be conveniently converted, and the columnar vector light field can be generated in different wavelengths by adjusting radio-frequency signals.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a device and method for generating a columnar vector beam in an optical fiber by using an electrically controlled tunable grating. Background technique [0002] Cylindrical vector light field is a kind of light field whose polarization state is symmetrically distributed in space. There are three main types of cylindrical vector light beams: radial polarization, angular polarization and mixed polarization vector light field. Due to its unique electric field distribution, the cylindrical vector beam has important application value and research significance in engineering and scientific research fields. Taking the radial polarization vector light field as an example, in the case of high numerical aperture focusing, it has a strong longitudinal electric field component, which is used in laser micro-nano processing, second harmonic generation (SHG), super-resolution imaging, s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G02F1/125
CPCG02F1/125
Inventor 张文定梅霆杨颢
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap