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Two-dimensional photonic crystal multiplexer/demultiplexer

一种二维光子晶体、合波器的技术，应用在光波导光导、仪器、光学等方向，能够解决分合波光谱长波麓、分合波效率降低等问题

Inactive Publication Date: 2006-10-11
JAPAN SCI & TECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This means that in the case where the split-multiplex spectrum is in the form of a Lorentz Function, a slight wavelength deviation will reduce the efficiency of split-combiner
[0011] The second problem is a problem caused by the long wavelength of the split-combined spectrum
Furthermore, this wave overlaps with the signal wavelength of the adjacent channel, causing two signals to crosstalk (crosstalk).

Method used

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  • Two-dimensional photonic crystal multiplexer/demultiplexer
  • Two-dimensional photonic crystal multiplexer/demultiplexer
  • Two-dimensional photonic crystal multiplexer/demultiplexer

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Embodiment Construction

[0058] exist Figure 5 The three-dimensional view (a) and plan view (b) of an embodiment of the two-dimensional photonic crystal splitter / multiplexer of the present invention are shown in the figure. The main body 21 has a flat plate shape. Different refractive index regions are provided on the main body 21 by opening the vacancies 22 in a triangular lattice shape with a period a. The input waveguide 23 and the output waveguide 24 are provided on the main body by missing only one row of vacancies 22 in a linear shape, that is, without providing vacancies 22 . Between the input waveguide 23 and the output waveguide 24, two point defects 25 and 26 of the same shape are provided. The point defects 25 and 26 will be described in detail later. Any one of the distance between the input waveguide 23 and the point defect 25, and the distance between the point defect 26 and the output waveguide 24 is the distance that the vacancies 22 are separated by 5 columns, that is, (5 / 2)×3 0....

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Abstract

The present invention provides a two-dimensional photonic crystal demultiplexer / multiplexer. An input waveguide (23) and an output waveguide (24) are provided on a two-dimensional photonic crystal comprising cyclically-disposed vacancies (22), and two spot-like defects (25, 26) deficlient in vacancies (22) are provided between the both waveguides, thereby preventing a decrease in wavelength-error-caused efficiency and crosstalk with other wavelengths in a two-dimensional photonic crystal slab multiplexer / demultiplexer.

Description

technical field [0001] The invention relates to a two-dimensional photonic crystal divider and multiplexer used in wavelength division multiplex communication and the like. In particular, it relates to a technology for improving the characteristics of the splitting and multiplexing. Background technique [0002] In recent years, the technology of the Wavelength Division Multiplexing (WDM) transmission system is developing. This WDM is a technology that propagates light of multiple wavelengths (frequency) (the "light" used in this specification includes electromagnetic waves) on a single transmission path, and carries independent signals for information transmission. In order to mix the light of each wavelength on the entrance side of the transmission path and take out the mixed light for each wavelength on the exit side, an optical multiplexer (multiplexer) and a demultiplexer (demultiplexer), or a wavelength filter are required. (filter). Conventionally, an arrayed waveg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/12G02B6/122
CPCG02B6/12007B82Y20/00G02B6/1225G02B6/12G02B6/122
Inventor 野田进浅野卓赤羽良启
Owner JAPAN SCI & TECH CORP