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Design method for cross section corrected bending optical waveguide structure

A design method and technology of optical waveguide, applied in the direction of optical waveguide light guide, cladding fiber, etc., can solve the problem of large optical bending loss, and achieve the effect of reducing optical loss, reducing external leakage, and improving transmission efficiency

Active Publication Date: 2008-06-04
SOUTHEAST UNIV
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Problems solved by technology

[0004] Technical problem: The purpose of this invention is to propose a design method for a curved optical waveguide structure with section correction, which solves the shortcomings of the existing technology such as large optical bending loss

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  • Design method for cross section corrected bending optical waveguide structure
  • Design method for cross section corrected bending optical waveguide structure
  • Design method for cross section corrected bending optical waveguide structure

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Embodiment Construction

[0015] The design method of the present invention is that the thickness or height of the core layer on the outer side of the curved optical waveguide is always greater than that on the inner side of the optical waveguide, or the thickness or height on the curved surface is increased. The refractive index of the core layer 2 is greater than that of the cladding layer 1 . When the curved optical waveguide is a planar structure, the cladding layer 1 includes an upper cladding layer 11 and a lower cladding layer 12, the core layer 2 is located between the upper cladding layer 11 and the lower cladding layer 12, and the refractive index of the core layer 2 is greater than that of the upper cladding layer 11. or the refractive index of the lower cladding layer 12 .

[0016] Schematic diagram of the structural design of the above section correction ( Figure 4 ), just illustrate the design method of the present invention, can not exhaust the whole of the figure designed by this meth...

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Abstract

This invention relates to a design method for a curved optical waveguide structure with a modified section including reducing the leakage of optical waveguide modes by changing its section shape, namely that the structure of a traditional shaft-symmetry section is modified to increase the outside diameter of the waveguide so as to contain more transmission modes and reduce the leakage of modes in transmission field to increase the transmission efficiency. The method includes: said curved optical waveguide is composed of a core and a cladding and the core is in the cladding, the thickness or height of the outside core is greater than that of the inside core or that on the curved face is increased and the refractive index of the core is greater than that of the cladding.

Description

technical field [0001] The invention relates to a method for designing a curved optical waveguide structure with section correction, and belongs to the technical field of curved optical waveguide structure design. Background technique [0002] Optical waveguide is the most basic physical concept in integrated optics, and it is also the most basic structural form of integrated optical devices. Broadly speaking, any physical structure or device capable of transmitting light waves can be called an optical waveguide. Optical waveguide, as the most basic structural form, is widely used in optical communication devices and integrated optical devices. A curved optical waveguide refers to an optical waveguide that is bent geometrically. Bending optical waveguides play an important role in integrated optical devices such as optical path connections, optical resonant rings, optical couplers, and waveguide array gratings (AWG). Bending of an optical waveguide introduces bend loss, w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
Inventor 张彤崔一平
Owner SOUTHEAST UNIV
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