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Active polarization rotator realized based on mixed surface plasma groove waveguide

A surface plasmon and polarization rotator technology, applied in light guides, instruments, optics, etc., can solve the problems of large polarization conversion loss and complex structure

Pending Publication Date: 2020-06-05
北京爱杰光电科技有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although this scheme can control any state of the output polarized light, it can be used as an implementation scheme of an active polarization rotator, but the structure is complex and the polarization conversion loss is large.

Method used

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  • Active polarization rotator realized based on mixed surface plasma groove waveguide
  • Active polarization rotator realized based on mixed surface plasma groove waveguide
  • Active polarization rotator realized based on mixed surface plasma groove waveguide

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Embodiment Construction

[0029] Such as figure 1 and 2 As shown, an active polarization rotator based on hybrid surface plasmon trough waveguide, including power beam splitter 1 (50:50 power beam splitter), phase modulation unit 2, polarization rotation control unit 3 and beam combiner 4 , the polarization rotation control unit 3 consists of figure 2 The hybrid surface plasmon groove waveguide shown here has a certain groove width, and the two dielectric waveguides 301 of the hybrid surface plasmon groove waveguide have a certain width, and the Both sides of the mixed surface plasmon trough waveguide are provided with a material 302 having metal properties with a certain thickness, length and width at a certain distance. By rationally optimizing the structural design parameters of the material 302 with metallic properties, the conversion efficiency of the polarization state of the output light is the highest and the polarization-dependent loss is minimized; by changing the relative phase difference...

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Abstract

The invention discloses an active polarization rotator realized based on a mixed surface plasma groove waveguide. The active polarization rotator comprises a power beam splitter, an MZI phase modulation unit, a polarization rotation control unit and a beam combiner. The polarization rotation control unit comprises a mixed surface plasma groove waveguide. The mixed surface plasma groove waveguide has a certain groove width, two dielectric waveguides of the mixed surface plasma groove waveguide have a certain width, and two sides of the mixed surface plasma groove waveguide are respectively provided with a material which has a certain thickness, length and width and has metal characteristics at a certain interval. The active polarization rotator has the advantages that the structure is simplified, the polarization conversion loss is small, and the active regulation and control of the polarization state of the output light can be realized for the incident light of two different polarization states.

Description

technical field [0001] The invention relates to an active polarization rotator realized based on a hybrid surface plasmon groove waveguide. Background technique [0002] The polarization diversity scheme is the main method to solve the problem of polarization sensitivity in the optical path. One of the most important core components in this scheme is the polarization rotator, which can ensure that only one polarization state signal is contained in the subsequent optical path, thereby simplifying the design of functional devices and optimization. By introducing the asymmetry of the waveguide structure, traditional polarization rotators can only achieve passive conversion between fixed polarization states, but in many applications such as control of the polarization state of output light from on-chip lasers, biosensing, polarization multiplexing, etc. In this scenario, it is necessary to realize the time-domain change of the polarization state. Referring to the similar desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/126G02B6/125G02B6/122
CPCG02B6/126G02B6/125G02B6/122
Inventor 周治平陈睿轩
Owner 北京爱杰光电科技有限公司
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