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Modulation method for diffraction band of Bragg reflector type concave diffraction grating

A technology of concave diffraction grating and modulation method, which is applied in the direction of diffraction grating, optics, instruments, etc., can solve the problems of the center wavelength error of the device diffraction band and the inability to effectively determine the boundary of the diffraction band, and achieve the effect of reducing deviation and improving the diffraction band

Active Publication Date: 2015-09-30
YANGZHOU RUNWELL OPTOELECTRONICS TECH
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Problems solved by technology

However, the limitation of the Bragg grating design method of the device makes the center wavelength of the diffraction band of the device have a large error, and the boundary of the diffraction band cannot be effectively determined.

Method used

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  • Modulation method for diffraction band of Bragg reflector type concave diffraction grating
  • Modulation method for diffraction band of Bragg reflector type concave diffraction grating
  • Modulation method for diffraction band of Bragg reflector type concave diffraction grating

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Embodiment

[0046] The present invention provides a kind of diffraction band modulation method of Bragg reflector type etching diffraction grating based on photonic crystal bandgap theory, for explaining concrete technical scheme better, the present invention provides the parameter of a group of Bragg-EDG devices, according to This parameter is used to modulate the Bragg-EDG device diffraction band, and the specific method includes the following steps:

[0047] 1). According to the existing Bragg-EDG device ( figure 1 ), with parameters

[0048]

[0049] Apply the transmission matrix method to calculate the Bragg reflective tooth surface (such as figure 2 ) at a fixed incident angle of the photonic crystal band gap diagram (such as image 3 ).

[0050] In the modulation method of mode 1, when the ratio of the Bragg reflector medium layer is fixed, that is is a fixed value, according to d is proportional to λ, which means that increasing (decreasing) the thickness of the Bragg p...

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Abstract

The invention discloses a modulation method for a diffraction band of a Bragg reflector type concave diffraction grating and belongs to the field of optical communication wavelength division multiplexing and spectrum detection. According to the method, on the basis of a photonic crystal theory, a reflection band with a Bragg reflecting surface is adjusted by changing a thickness ratio and the periodic thickness of a Bragg periodic structure, and a Bragg-EDG (Etched Diffraction Grating) diffraction band is further modulated. By means of the technical method, performance parameters of an EDG wavelength division multiplexer adopting a Bragg tooth surface structure and a spectrum detection work waveband can be modulated, and the design deviation problem of the Bragg-EDG diffraction bandwidth can be solved.

Description

【Technical field】 [0001] The invention relates to the technical field of wavelength division multiplexing in the field of optical communication, and relates to a diffraction band modulation method of a Bragg reflector type concave diffraction grating. 【Background technique】 [0002] The Bragg-EDG device is an etched diffraction grating (Etched Diffraction Grating, EDG for short) wave multiplexer / demultiplexer. The EDG device is characterized by small size, relatively low process difficulty, stable performance, easy mass production, low cost, It is suitable for intensive wavelength division multiplexing and other characteristics, and has been extensively researched and applied. [0003] In the field of optical communication, the device can achieve dozens of times or hundreds of times of channel expansion on a single waveguide or optical fiber. In addition, the device can be made into a micro-miniature spectrometer, which can be used in the field of spectral monitoring. , Wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/18G02B27/00
Inventor 杜炳政朱京平李宝毛玉政王凯
Owner YANGZHOU RUNWELL OPTOELECTRONICS TECH
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