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Double-S-shaped terahertz wave polarization beam splitter

A polarization beam splitter and polarization beam splitting technology, applied in the direction of instruments, light guides, optics, etc., can solve the problems of difficult manufacturing process, low beam splitting rate, complex structure, etc., and achieve compact structure, high beam splitting rate, and easy integration Effect

Inactive Publication Date: 2013-02-13
CHINA JILIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a double S-shaped terahertz wave polarization beam splitter with high beam splitting rate in order to overcome the disadvantages of low beam splitting rate, large volume, complex structure and difficult actual manufacturing process in the prior art

Method used

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Embodiment 1

[0016] Double S-shaped terahertz wave polarizing beam splitter:

[0017] The material of the substrate is silicon dioxide, the length is 2200 μm, the width is 1400 μm, and the thickness is 300 μm. The material of the waveguide is silicon, and the thickness is 50 μm. The lengths of the first transverse straight waveguide, the second transverse straight waveguide, the third transverse straight waveguide and the fourth transverse straight waveguide are 400 μm, 700 μm, 1100 μm and 1500 μm respectively, and the widths are all 100 μm. The length of the upper base of the inverted isosceles trapezoidal waveguide is 400 μm, the length of the lower base is 700 μm, and the height is 300 μm. The lengths of the first longitudinal straight waveguide and the second longitudinal straight waveguide are 700 μm and 1000 μm respectively, and the width is 100 μm; the distance between the first longitudinal straight waveguide and the second longitudinal straight waveguide is 1000 μm. The size of ...

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Abstract

The invention discloses a double-S-shaped terahertz wave polarization beam splitter which comprises a signal input end, a first signal output end, a second signal output end, a base body, a first horizontal straight waveguide, a second horizontal straight waveguide, a third horizontal straight waveguide, a fourth horizontal straight waveguide, a reversed isosceles trapezoid waveguide, a first longitudinal waveguide, a second longitudinal waveguide, an S-shaped waveguide and a reversed-S-shaped waveguide. The first horizontal straight waveguide, the second horizontal straight waveguide, the third horizontal straight waveguide, the fourth horizontal straight waveguide, the reversed isosceles trapezoid waveguide, the first longitudinal waveguide, the second longitudinal waveguide, the S-shaped waveguide and the reversed-S-shaped waveguide are positioned on the base body. Terahertz wave can be input from the signal input end, transverse electric (TE) wave can be directly output from the first signal output end, and transverse magnetic (TM) wave can be output from the second signal output end to obtain the polarization beam splitting function. The double-S-shaped terahertz wave polarization beam splitter has the advantages of being compact in structure, high in beam splitting rate, small in size, convenient to manufacture, easy to integrate and the like and meeting application requirements of fields of terahertz wave medical imaging, terahertz wave communication and the like.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a double S-shaped terahertz wave polarization beam splitter. Background technique [0002] With the development of ultrafast laser technology and the further deepening of people's understanding of terahertz band and pulsed light source, terahertz technology, as a new and rapidly developing technology, has attracted much attention in many fields. Especially in medical diagnosis, biotechnology, object imaging, information fields, etc., terahertz technology has been applied and has shown broad application prospects. Terahertz waves have the following properties: (1) Transient: The typical pulse width of terahertz pulses is on the order of picoseconds, which can not only facilitate time-resolved research, but also effectively suppress background radiation noise interference through sampling measurement techniques. (2) Broadband: Terahertz pulse sources usually include several periods of electromag...

Claims

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Application Information

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IPC IPC(8): G02B6/126
Inventor 李九生
Owner CHINA JILIANG UNIV
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