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an optical isolator

An optical isolator, a pair of technology, applied in the direction of light guides, optics, instruments, etc., can solve problems such as numerous processes, inconsistent product specifications, placement of small components, and time-consuming fixation, and achieve the effect of reducing costs

Active Publication Date: 2018-07-10
SHANGHAI HONGHUI OPTICS COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing isolators are complicated to manufacture, with numerous processes, time-consuming placement and fixing of small parts, and inconsistent product specifications, which is not conducive to large-scale production

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] see figure 1 , figure 2 and image 3 , the optical isolator of the present invention includes a planar optical waveguide 1, and a pair of coupling fiber heads (not shown) respectively connected to the input end and output end of the planar optical waveguide 1. The coupling fiber head plays the role of coupling light into the planar optical waveguide 1 and coupling the light output from the optical waveguide into the optical fiber. The planar optical waveguide 1 can be made of quartz or single crystal silicon.

[0018] Light is transmitted from the input end of the planar optical waveguide 1 to the output end, forming an evanescent wave field around the planar optical waveguide 1 . Both sides of a section of the planar optical waveguide 1 take the optical waveguide as the axis of symmetry, and are distributed with medium 2 arranged periodically and having a refra...

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Abstract

The present invention discloses an optical isolator, comprising a planar optical waveguide, and a pair of coupling optical fiber heads which are respectively connected to an input end and an output end of the planar optical waveguide; wherein mediums which are periodically arranged and have the refractive index different from the refractive indexes of peripheral substances are distributed at two sides of a section of the planar optical waveguide in the way of taking the planar optical waveguide as a symmetric axis; for any one straight line perpendicular to the planar optical waveguide, the mediums cannot form mirror symmetry, in this way, components such as polarizer, magneto-optical crystal and magnetic field are not used, thereby greatly reducing cost.

Description

technical field [0001] The present invention relates to an optical communication device, in particular to an optical isolator. Background technique [0002] Semiconductor lasers and optical amplifiers are very sensitive to reflected light from connectors, splices, filters, etc., which can easily lead to performance degradation. Therefore, an optical isolator is required to block reflected light. An optical isolator is an optical passive device that only allows light to pass in one direction and blocks light in the opposite direction. The light reflected by the optical fiber echo can be well isolated by the optical isolator. In high-speed or long-distance optical fiber communication, the optical isolator has become an indispensable and important device. For the high-speed development of dense wavelength division multiplexing optical fiber communication, optical isolators play a huge role. [0003] Existing optical isolators are all based on the non-reciprocity of the Farad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27
CPCG02B6/2746
Inventor 黄惠良赵继鸿侯继东
Owner SHANGHAI HONGHUI OPTICS COMM TECH