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Narrow band optical filter based on prism coupling guided-mode resonance

An optical filter and narrow-band technology, applied in the field of waveguide optics, can solve problems such as complex preparation process and complex device structure, and achieve the effects of convenient preparation, narrow bandwidth and convenient use

Inactive Publication Date: 2016-10-12
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these devices have complex structures and complicated fabrication processes.

Method used

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  • Narrow band optical filter based on prism coupling guided-mode resonance
  • Narrow band optical filter based on prism coupling guided-mode resonance
  • Narrow band optical filter based on prism coupling guided-mode resonance

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Embodiment Construction

[0024] The narrow-band optical filter based on prism coupling guided mode resonance designed by the present invention includes: a composite transparent body (hereinafter referred to as the composite body) of a cylinder or square cylinder and a planar optical waveguide. Wherein, the cylinder or square cylinder is formed along the longitudinal axis Cut at a certain angle, and prepare a planar optical waveguide on a cut surface according to the transmission center wavelength. The planar optical waveguide is composed of films with different layers and thicknesses. Then, the two cut bodies are bonded, fixed, and sealed along the cut surface to form a composite body. Both ends of the complex are coated with broadband anti-reflection film. The narrow-band filter of the present invention specifically includes: collimated incident light beam 1, antireflection coating layer 2 and 8 on the end face, cylinder or square cylinder cutting body 3 and 7, planar optical waveguide, by low refrac...

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Abstract

The invention belongs to a guided wave optical technology field, to be specific, relates to a narrow band optical filter based on prism coupling guided-mode resonance. The narrow band optical filter comprises a composite transparent body (hereinafter referred to as a composite body) combining a circular cylinder or a square cylinder and a planar optical waveguide together. The circular cylinder or the square cylinder is cut open along a longitudinal axis at a certain angle, and the planar optical waveguide is arranged on a section according to a transmission center wavelength, and is formed by different layers and thicknesses. Two cut bodies are attached to each other along the sections, and then are fixed and sealed to form the composite body. The two end surfaces of the composite body are provided with broadband anti-reflection films in a coated manner. During the use, a light beam is transmitted along the longitudinal axis of the composite body, and the transmittance of the center transmittance wavelength can reach 100%, and the band width can reach nm magnitude. The filter provided by the invention has important application in an optical communication technology and a spectrum technology. Based on a prism coupling guided-mode resonance principle, production of a grating structure is not required, and therefore the production is convenient, the use is simple, and the band width is narrow.

Description

technical field [0001] The invention belongs to the technical field of guided wave optics, in particular to a narrow-band optical filter based on prism coupling guided mode resonance. Background technique [0002] Narrowband optical filters are indispensable optical devices in optical communication and spectral technology. There are many technologies that can produce narrow-band optical filtering, such as optical thin films, interference filters, and guided-mode resonant filters based on grating structures. However, most of these devices have complex structures and complex fabrication processes. [0003] The present invention proposes that the narrow-band optical filter is based on the prism-coupled guided-mode resonance filtering technology, which corresponds to the guided-mode resonance technology of the grating structure, but the device structure of the present invention does not contain a grating, so the preparation of sub-wavelength The complex process of the grating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293
CPCG02B6/29344
Inventor 刘建华陶李
Owner FUDAN UNIV
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