Magneto-opotic crystal/magneto-optic film composite type structure Faraday rotator

A Faraday rotator and magneto-optical crystal technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of low saturation magnetization, large wavelength coefficient, and optical isolator drop, and achieve great application value and wide temperature operation The effect of interval and wide working bandwidth

Inactive Publication Date: 2005-10-26
ZHEJIANG UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when λ=1550nm, the thickness of the 45° Faraday rotator is only 0.3mm, and the saturation magnetization of the crystal is low (about tens of thousands of A/m), but its Faraday rotation angle (θ f ) has large temperature coefficient FTC (-0.08deg/K) and wavelength coefficient FWC (0.14%/nm), so that the 45° Farada

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
  • Magneto-opotic crystal/magneto-optic film composite type structure Faraday rotator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Magneto-optic crystal / magneto-optic thin film compound structure Faraday rotator with rare earth iron garnet magneto-optic crystal

[0010] 1. On the rare earth iron garnet magneto-optical crystal 1, a liquid phase epitaxial rare earth iron garnet magneto-optical thin film layer 2 is arranged.

[0011] The invention is based on Re 1 x Re 2 y Bi 3-x-y Fe 5 o 12 (wherein, 1.51 : Indicates Yb, etc., Re 2 : Indicates Tb, Ho, Y, which are two types of rare earth ions that have positive and negative responses to the wavelength coefficient of Faraday rotation) A liquid phase epitaxy layer of Tb on the surface of the magneto-optic crystal x Bi 3-x Ga y Fe 5-y o 12 (wherein, 5

[0012] The present invention takes B 2 o 3 / Bi 2 o 3 As a flux, the method of spontaneous nucleation and slow cooling of high-temperature solution was used to grow Re 1 x Re 2 y Bi 3-x-y Fe 5 o 12 Magneto-optic crystals, adjust the Re in the ...

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 discloses a magneto-optic crystal/ magneto-optic film composite Faraday rotator, provided with a rare-earth iron garnet magneto-optic crystal and arranging a liquid-phase epitaxial iron garnet magneto-optic film layer on the rare-earth iron garnet magneto-optic crystal. The rare-earth iron garnet magneto-optic crystal has a composition: Re1xRe2yBi3-x-yFe5O12, where 1.5<x<2.8, 0.2<y<1.0, and Re1 stands for Yb, and Re2 stands for Tb, Ho and Y and they has positive and negative response to the wavelength coefficient of Faraday rotator, respectively. The composition of the said film layer is TbxBi3-xGaFe5-yO12, where 1.5<x<2.5, and 0<y<1.0. The invention has wide operating range and operating temperature internal and can make it possible for an wide-range (>50nm), wide-temperature range (-30 deg.C to +80 deg.C) optical isolator, which has an extremely great application value in the development of optical communication system, optical integration system, optical measurement system, and other systems.

Description

technical field [0001] The invention relates to optical communication and optical integration, in particular to a Faraday rotator with magneto-optic crystal / magneto-optic thin film composite structure. Background technique [0002] In recent years, with the development of optical communication, optical cable TV, and optical integration systems, an intelligent broadband optical fiber network has gradually formed, and the performance indicators such as bandwidth operating characteristics and temperature characteristics of optical isolators are more stringent. Taking polarization-sensitive optical isolators as an example, based on the conventional level of various companies at home and abroad, the current optical isolator products work at a center wavelength of 1550nm, with insertion loss < 0.5dB, and a working bandwidth of only about 20nm under the condition of reverse isolation > 40dB. , the working temperature range under the specified bandwidth index is 0℃~50℃. Howev...

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): G02F1/09
Inventor 徐志成黄敏李淼
Owner ZHEJIANG 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