Waveguide type polarizing beam splitter

A polarized beam splitter and polarized light technology, applied in the field of integrated photonics, can solve problems such as the inability to control the polarization state of the output port optical signal, wavelength dependence, structural parameter sensitivity and difficulty in manufacturing, and achieve easy design and Production, low wavelength dependence, and easy control

Inactive Publication Date: 2012-12-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In recent years, there are few reports on waveguide polarized beam splitters with switchable polarized output ports, and the polarization state of the optical signal at the output port cannot be adjusted, and due to wavelength dependence, structural parameter sensitivity, and process difficulty and other reasons are subject to many restrictions in practical applications

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  • Waveguide type polarizing beam splitter
  • Waveguide type polarizing beam splitter
  • Waveguide type polarizing beam splitter

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings. Usually, the communication window in an optical communication system is near-infrared light. Here, it is assumed that the working wavelength of the optical signal is 1.55 μm. Such as figure 1 As shown, the core layer liquid crystal material connecting the waveguide 8 is liquid crystal E7, and the other core layer materials are polysulfone doped with ICP-E. The polysulfone of E has a refractive index of 1.67; the cladding material 1 is a polymer material UV15, and its refractive index is 1.50. The core layer thickness d, ridge height h and width w of the waveguide are 1.0 μm, 0.8 μm and 5.0 μm respectively, and the deflection angle θ is 1 degree. To simplify the calculation, the three-dimensional waveguide is equivalent to a two-dimensional slab waveguide by using the effective refractive index method. For TE waves, the equivalent refractive indices in the core and cla...

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Abstract

A waveguide type polarizing beam splitter belongs to the technical field of integrated photon devices, is based on the total internal reflection principle and the mode field coupling principle and adopts liquid crystal materials with a large double refraction difference. According to the invention, optical signals of different polarization states can automatically select specific branch waveguides at branch positions to transmit so as to realize effective separation of the optical signals of different polarization states; the refractivity of the liquid crystals at a regulation and control area can be changed through utilizing an electro-optical effect so as to achieve the purpose that the output ports of the optical signals of different polarization states exchange and further realize regulation and control of a polarized light output passage. The polarizing beam splitter provided by the invention has the advantages of simple structure, easiness in design and manufacturing, low wave length dependence, simplicity and convenience in regulation and control, and the like, and has an application prospect in an integrated photon system.

Description

technical field [0001] The invention belongs to the field of integrated photonics, relates to an optical waveguide device, and specifically refers to a polarization beam splitting device based on a Y-branch waveguide structure. Background technique [0002] Due to its compact structure, good reliability, stable performance, low loss and easy integration and many other advantages, optical waveguide devices have attracted extensive attention and attention from researchers at home and abroad, and have developed rapidly in recent years. Optical waveguide devices are unit devices in integrated photonic systems. Various active or passive optical waveguide devices can be effectively integrated by using different integration methods (including monolithic integration and hybrid integration), so as to achieve corresponding optical information processing. Functional integrated photonic systems, they have a wide range of applications in optical communication, optical signal processing, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/126G02F1/13
Inventor 唐雄贵张林廖进昆陆荣国李和平刘永智刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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