Polarization-independent lithium niobate optical isolator

An optical isolator, lithium niobate technology, applied in the direction of light guide, optics, instrument, etc., can solve the problems of integration obstacles, lack of optical isolator integration methods, etc., achieve high coupling efficiency, increase applicability and ease of use, and enrich The effect of diversity

Active Publication Date: 2021-04-27
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the lack of an effective and practical integration method for optical isolators

Method used

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  • Polarization-independent lithium niobate optical isolator
  • Polarization-independent lithium niobate optical isolator
  • Polarization-independent lithium niobate optical isolator

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[0025]In order to make the objects, technical solutions, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026]Embodiments of the present disclosure provide a lithium niobate light isolator with polarization, including an integral first interference arm 1, a second interference arm 2, a first coupler 3, and a second coupler 4, first The coupler 3 and the second coupler 4 are formed at both ends of the first interference arm 1, the second interference arm 2, and the first interference arm 1, and the second interference arm 2 is at least a mutual waveguide, non-mutually Easy waveguide, where: the length of the interlocutaneous waveguide of the first interference arm is different from the length of the mutual waveguide of the second interference arm 2; the non-mutual waveguide includes magneto-optical waveguide and lithium niobate waveguide, magneto-optical waveguide is located in lithi...

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Abstract

The invention provides a polarization-independent lithium niobate optical isolator, which comprises a first interference arm (1), a second interference arm (2), a first coupler (3) and a second coupler (4) which are integrally formed; the first coupler (3) and the second coupler (4) are formed at the two ends of the first interference arm (1) and the two ends of the second interference arm (2) respectively. Each of the first interference arm (1) and the second interference arm (2) at least comprises a reciprocal waveguide and a non-reciprocal waveguide along the length direction, and the reciprocal waveguide of the first interference arm (1) and the reciprocal waveguide of the second interference arm (2) are different in length; the nonreciprocal waveguide comprises a magneto-optical waveguide and a lithium niobate ridge waveguide, the magneto-optical waveguide is located above the planar waveguide of the lithium niobate ridge waveguide, and the magneto-optical waveguide and the ridge of the lithium niobate ridge waveguide are formed side by side in the width direction; the first coupler (3) and the second coupler (4) are lithium niobate ridge waveguides, so that reverse input light of a transverse mode and reverse input light of a longitudinal mode are isolated at the same time. The polarization-independent lithium niobate optical isolator has the characteristics of polarization independence, high waveguide coupling efficiency, easiness in integration and the like.

Description

technical field [0001] The invention relates to the technical field of micro-nano optoelectronics integration, in particular to a lithium niobate optical isolator which has nothing to do with polarization. Background technique [0002] With the development of the information age, in order to better meet its "explosive growth" information transmission needs, the performance requirements for optical fiber communication modules, links and systems are gradually increasing. In the optical path, due to various reasons, the reflected light opposite to the direction of the forward transmission light will be generated. For example, when the light is coupled into the optical fiber, due to the existence of connectors and fusion points, there will be reflections at these end faces and points that are different from the original transmission direction. Opposite reflected light. When the photons of the reflected wave return to the device, they have a secondary interaction with the semico...

Claims

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Application Information

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IPC IPC(8): G02F1/095G02F1/09G02B6/28G02B6/27
CPCG02F1/093G02F1/0955G02B6/2746G02B6/2813
Inventor 李明轩赵奕儒戴双兴李金野刘建国
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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