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Photonic crystal fiber and coherent mid-infrared super-continuum spectrum light source

A technology of photonic crystal fiber and coherent light source, applied in the field of nonlinear optics, to achieve the effect of high coherence and simple structure

Inactive Publication Date: 2019-12-10
苏州众为光电有限公司
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  • Application Information

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Problems solved by technology

However, its usable bandwidth is usually lower than that of anomalous dispersion fiber

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  • Photonic crystal fiber and coherent mid-infrared super-continuum spectrum light source
  • Photonic crystal fiber and coherent mid-infrared super-continuum spectrum light source
  • Photonic crystal fiber and coherent mid-infrared super-continuum spectrum light source

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Embodiment Construction

[0040] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0041] A photonic crystal fiber, including a photonic crystal fiber with selenium arsenide as a matrix material; it should be noted that PCF (Photonic Crystal Fibers, photonic crystal fiber) is a type of fiber, and its guiding solid core area is surrounded by air holes. It enables remarkable flexibility in the dispersed design of PCFs by controlling the core size, pore size, and periodicity. Furthermore, PCFs can have very small cores, resulting in high nonlinearities. Therefore, PCF is the preferred nonlinear medium for supercontinuum generation. Silica-based glass fibers have been shown to be excellent nonlinear media for supercontinuum generation;...

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Abstract

The invention provides a photonic crystal fiber. The fiber comprises a photonic crystal fiber taking selenium arsenide as a matrix material; a plurality of air holes are distributed in the cross section of the photonic crystal fiber; from the inside to the outside of the photonic crystal fiber, the air holes are arranged in a hexagonal shape and sequentially form a plurality of circles of air holes; the air holes in the innermost ring are filled with chalcogenide compounds. The invention also relates to a coherent mid-infrared super-continuum spectrum light source. The fiber is advantaged in that the high-coherence mid-infrared supercontinuum is generated in the near-zero flat full-positive dispersion chalcogenide glass photonic crystal fiber, a problem of low coherence of a current mid-infrared supercontinuum light source is solved. The coherent mid-infrared super-continuum spectrum light source is advantaged in that the structure is simple, the output spectrum covers the mid-infraredband, the coherence degree is high and the like, and the coherent mid-infrared super-continuum spectrum light source has immeasurable application prospects in the fields of optical coherence tomography, spectrum detection, nonlinear microscopes and the like.

Description

technical field [0001] The invention relates to the field of nonlinear optics, in particular to a coherent mid-infrared supercontinuum light source. Background technique [0002] Supercontinuum light sources with high brightness and high coherence are widely used in many fields such as nonlinear spectroscopy, optical coherence tomography, and optical frequency metrology. When high-intensity pump light is focused into a nonlinear medium, its spectrum is severely broadened by a series of nonlinear processes, including soliton effects, self-phase modulation, cross-phase modulation, modulation instability, Raman scattering, and four-wave mixing , creating a continuum of light that is wider than the wavelength of the original light, a process called supercontinuum generation. The research and development of supercontinuum from visible light, near-infrared to mid-infrared bands meets many practical needs; among them, the mid-infrared band has the characteristics of being in the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067G02B6/02
CPCG02B6/02333H01S3/06716H01S3/06741
Inventor 刘永杜明
Owner 苏州众为光电有限公司
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