Terahertz wave polarization beam splitter with trapezoidal structures loaded on borders

A technology of polarizing beam splitter and trapezoidal structure, which is applied to the coupling of optical waveguides and other directions, can solve the problems of difficult manufacturing process, low beam splitting rate and complex structure, and achieve the effects of simple structure, high beam splitting rate and small size.

CN102902018AInactive Publication Date: 2013-01-30CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-01-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a terahertz wave polarization beam splitter with trapezoidal structures loaded on the borders. The terahertz wave polarization beam splitter comprises a signal input terminal, a first signal output terminal, a second signal output terminal, a far infrared quartz glass matrix and a polarization beam splitting piece; the polarization beam splitting piece is arranged on the far infrared quartz glass matrix; the polarization beam splitting piece comprises a left side narrow rectangular polarization silicon waveguide, a right side wide rectangular polarization silicon waveguide, an upper side rectangular polarization silicon waveguide, a lower side rectangular polarization silicon waveguide, a long trapezoidal polarization silicon waveguide and a short trapezoidal polarization silicon waveguide; signals are vertically emitted from the signal input terminal and pass through the polarization beam splitting piece; the first signal output terminal outputs TE waves; and the second signal output terminal outputs TM waves, so that polarization beam splitting performance is obtained. The terahertz wave polarization beam splitter has the advantages of simple structure, high beam splitting rate, small dimension, low cost, convenience in manufacture and the like.
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Description

technical field

[0001] The invention relates to a beam splitter, in particular to a frame-loaded trapezoidal structure terahertz wave polarization beam splitter. Background technique

[0002] Terahertz waves are electromagnetic waves with a frequency range of 0.1-10 THz (wavelength range of 30 μm to 3 mm). This band is located between microwaves and infrared radiation, and is the marginal area of ​​electromagnetics and optics research. The early research on terahertz radiation can be traced back to the beginning of the last century. Before the 1980s, due to the lack of effective methods for generating and detecting electromagnetic waves in the terahertz frequency band, the research on electromagnetic waves in this frequency band developed very slowly. The understanding of radiation properties is very limited, and in recent decades, with the rapid development of ultrafast optoelectronic technology, a stable excitation light source has been provided for the generation of terah...

Examples

Embodiment 1

[0016] Terahertz wave polarizing beam splitter with trapezoidal structure loaded on the frame:

[0017] The length of the signal input end is 500 μm, the width is 200 μm, and the thickness is 150 μm. Both the first signal output end and the second signal output end have a length of 500 μm, a width of 200 μm, and a thickness of 150 μm. The far-infrared quartz glass substrate has a length of 2000 μm, a width of 1600 μm, and a thickness of 500 μm. The thickness of the polarizing beam splitter is 150 μm. The narrow rectangular polarized silicon waveguide on the left has a width of 300 μm and a length of 500 μm; the wide rectangular polarized silicon waveguide on the right has a width of 400 μm and a length of 500 μm. The upper rectangular polarized silicon waveguide has a width of 300 μm and a length of 800 μm; the lower rectangular polarized silicon waveguide has a width of 300 μm and a length of 800 μm. The length of the upper base of the long trapezoidal polarization silicon...