Waveguide type polarization independence light ring machine based on polarization mode segregator

A polarization mode and separator technology, which is applied in the field of optical communication applications and integrated optics, can solve problems such as unfavorable integration, and achieve the effects of avoiding difficulties in the manufacturing process, low insertion loss, and easy integration.

Inactive Publication Date: 2008-07-30
SOUTHEAST UNIV
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Problems solved by technology

[0008] Two optical power splitters and two phase shift arms sandwiched between the optical power splitters can form a Mach-Zehnder type polarization mode splitter. At present, power splitters are mostly realized by directional couplers, but it is not conducive to integrated

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  • Waveguide type polarization independence light ring machine based on polarization mode segregator
  • Waveguide type polarization independence light ring machine based on polarization mode segregator

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[0027] As shown in Figure 1, a waveguide-type polarization-independent optical circulator based on polarization mode separators includes a first polarization mode separator 1 and a second polarization mode separator 2, and mutual Connected waveguide type Faraday rotating mirror 3 and half-wave plate 4. The first polarization mode separator 1 and the second polarization mode separator 2 adopt Mach-Zehnder integrated waveguide polarization mode separators. The waveguide Faraday rotating mirror 3 adopts a non-reciprocal waveguide Faraday rotating mirror capable of deflecting the phase clockwise by π / 4, and the half-wave plate 4 adopts a half-wave plate whose angle between the slow axis direction and the horizontal direction is π / 8. The two output ports of the first polarization mode separator 1 are connected with the two input ports of the waveguide type Faraday rotating mirror 3, and the two output ports of the waveguide type Faraday rotating mirror 3 are connected with the two ...

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Abstract

The invention discloses a waveguide type polarization-independent optical circulator based on a polarization mode separator, which is characterized in that the optical circulator comprises a first polarization mode separator (1) and a second polarization mode separator (2), a waveguide type faraday rotating mirror (3) and a half-wave plate (4) connected with each other are provided between the two polarization mode separators, the first polarization mode separator (1) and the second polarization mode separator (2) are respectively comprises a first optical power splitter (5), a second optical power splitter (6), a first magneto-optical waveguide (7) and a second magneto-optical waveguide (8). The invention has the advantages of simple structure, and easy integration; remarkably reduced insertion loss compared with phase separation adjuster; high bandwidth, insensitive polarization, and easy integration with optical communication system; and effectively reduced polarization crosstalk.

Description

technical field [0001] The invention relates to a waveguide polarization-independent optical circulator based on a polarization mode separator, in particular to an optical circulator based on a Mach-Zehnder type integrated waveguide polarization mode separator, which belongs to the field of optical communication applications and integrated optics. Background technique [0002] Under the action of an external magnetic field, the magneto-optical material will affect the polarization state of the polarized light passing through it, that is, produce the Faraday magneto-optic effect. For a magneto-optical waveguide with a transverse configuration, under the action of an external magnetic field perpendicular to the direction of light propagation, the propagation constants of the forward and reverse propagation of the TM mode are different, so a non-reciprocal phase shift will occur. The non-reciprocal properties of optical materials can make optical circulators, optical isolators ...

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Application Information

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IPC IPC(8): G02B6/26G02B6/28G01J9/02G02B5/30G02F1/095
Inventor孙小菡赵俊
OwnerSOUTHEAST UNIV