Tunable single-core photonic crystal fiber SPR single polarization wavelength splitter

A photonic crystal fiber, single-polarization technology, applied in cladding fiber, optical waveguide light guide, instruments, etc., can solve the problem that wavelength splitting and tunability cannot be realized.

Active Publication Date: 2017-07-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under a specific PCF, its refractive index distribution, air hole size and coupling length parameters are fixed values, so the tunable wavelength splitting cannot be realized, and the optical fibers in these PCF wavelength splitters must be double-core or multi-core PCF can achieve wavelength splitting

Method used

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  • Tunable single-core photonic crystal fiber SPR single polarization wavelength splitter

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Effect test

Embodiment approach 1

[0013] A tunable single-core photonic crystal fiber SPR single-polarization wavelength splitter includes a single-core PCF7 with regular hexagonal air hole distribution, and the background material is quartz 5. Wherein, the radius of the small air hole 4 is 0.2 micron; the radius of the large air hole 1 is 0.5 micron, the period 6-1 is 1.1, and the center distance 6-2 of the large and small air holes is 0.8 micron; the major and minor axis radii of the four elliptical air holes 3 0.5 micron and 1 micron respectively; in the single-core PCF7, the symmetrical upper air hole 2-1 is coated with a metal material 8-1 with a thickness of 30 microns, and the inner sidewall of the lower air hole 2-2 is coated with a thickness of 35 micron metal material 8-2. According to the mixed-mode coupling effect of SPR and single-polarization filtering characteristics, when the light containing two wavelengths of A and B enters the single-core PCF7, the X-polarization of the A-wavelength light is...

Embodiment approach 2

[0015] A tunable single-core photonic crystal fiber SPR single-polarization wavelength splitter includes a single-core PCF7 with regular hexagonal air hole distribution, and the background material is quartz 5. Wherein, the radius of the small air hole 4 is 0.6 micron; the radius of the large air hole 1 is 2 micron, the cycle 6-1 is 4.1 micron, and the center distance 6-2 of the large and small air holes is 2.7 micron; the major and minor axes of the four elliptical air holes 3 The radii are 2.2 microns and 2.5 microns respectively; the symmetrical upper air hole 2-1 is coated with a metal material 8-1 with a thickness of 35 microns, and the inner wall of the lower air hole 2-2 is coated with a metal material with a thickness of 45 microns 8-2. According to the mixed-mode coupling effect of SPR and single-polarization filtering characteristics, when the light containing two wavelengths of A and B enters the single-core PCF7, the X-polarization of the A-wavelength light is abso...

Embodiment approach 3

[0017] A tunable single-core photonic crystal fiber SPR single-polarization wavelength splitter includes a single-core PCF7 with regular hexagonal air hole distribution, and the background material is quartz 5. Wherein, the radius of the small air hole 4 is 0.2 micron; the radius of the large air hole 1 is 0.5 micron, the period 6-1 is 1.1 micron, and the center distance 6-2 of the large and small air holes is 0.8 micron; the major and minor axes of the four elliptical air holes 3 The radii are 0.5 micron and 1 micron respectively; the symmetrical upper air hole 2-1 is coated with a metal material 8-1 with a thickness of 40 microns, and the inner wall of the lower air hole 2-2 is coated with a metal material with a thickness of 55 microns 8-2. According to the mixed-mode coupling effect of SPR and single-polarization filtering characteristics, when the light containing two wavelengths of A and B enters the single-core PCF7, the X-polarization of the A-wavelength light is absor...

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Abstract

The invention discloses a tunable single-core Photonic Crystal Fiber (PCF) SPR single polarization wavelength splitter, relates to a tunable fiber wavelength splitter, belongs to the field of fiber communication and optical devices, and is suitable for the fields of wavelength division multiplexing / demultiplexing, fiber sensing and laser systems. The shortcomings of fixed wavelength splitting of a general PCF wavelength splitter, small bandwidth, insufficient mode coupling and failure to realize beam splitting using a single-core PCF are overcome. In a single-core PCF (7), symmetrical upper (2-1) and lower air holes (2-2) are plated with metal materials (8-1, 8-2) on the inner side walls thereof. According to an SPR mixed mode coupling effect and a single polarization filtering property, when the light containing A and B wavelengths enters the PCF (7), the X polarized light of the light of the A wavelength is lost and Y polarized light is output, the light of the B wavelength is the other way around, and thus the light of the two wavelengths is split. In addition, according to a magneto-optic effect, the magnetic fluid refractive index in an oval air hole (3) varies with a magnetic field, and finally, the single polarization wavelength splitting is enabled to be tunable.

Description

technical field [0001] The invention relates to a tunable single-core photonic crystal fiber SPR single-polarization wavelength splitter, which belongs to the field of optical fiber communication, optical network and optical devices, and is suitable for the fields of wavelength division multiplexing and demultiplexing, optical test instruments, optical fiber sensing and laser systems, etc. . Background technique [0002] Surface Plasmon Resonance (SPR) generally occurs at the junction of the medium and the metal, and is an electronic vibration phenomenon, which promotes the coupling of the metal surface wave mode with the waveguide mode, and finally under certain conditions (a certain Once the wavelength or incident angle is determined), the phase matching of the two modes produces resonant coupling. At this time, the loss value reaches the maximum and the loss peak appears. The common excitation structures of SPR include prism type, planar grating type and fiber type struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02F1/095
CPCG02B6/02338G02B6/0239G02F1/095
Inventor 裴丽翁思俊王建帅吴良英李月琴
Owner BEIJING JIAOTONG UNIV
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