Tunable optical filter based on PVDF terpolymer

An optical filter and terpolymer technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of limited practical application, small electro-optical effect, and unsatisfactory requirements.

Inactive Publication Date: 2008-07-16
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

Several foreign companies have introduced tunable filters based on the liquid crystal electro-optic effect, but due to the slow response speed, strong temperature dependence and the state of the liquid crystal medium itself, the spectral tuning range is narrow, and the practical application is very limited.
However, the inorganic material lithium niobate cannot meet the requirements of practical applications due to its small electro-optic effect.

Method used

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  • Tunable optical filter based on PVDF terpolymer
  • Tunable optical filter based on PVDF terpolymer

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Embodiment Construction

[0017] The invention utilizes the electro-deformation effect of the piezoelectric polymer PVDF terpolymer, adopts a specific film-forming process to make the polymer film produce a strain of up to 15% in the thickness direction in the electric field, and further designs a multi-layer film with a special structure Optical devices, preparation of new tunable optical filters.

[0018] As shown in Figure 1, the tunable optical filter based on PVDF terpolymer is provided with a glass substrate 1 coated with an anti-reflection film, a dielectric high-reflection film 2, a metal film 3, and a piezoelectric polymer from top to bottom. Glass micropillars 7 are arranged at both ends of the film 4 , the film electrode 5 , the substrate 6 , the metal film 3 , the piezoelectric polymer film 4 and the film electrode 5 .

[0019] The film-forming material of the piezoelectric polymer film 4 is P(VDF-TrFE-CTFE), P(VDF-TrFE-CFE), P(VDF-TrFE-HFE) or P(VDF-TrFE-CDFE); Among them, VDF is vinylide...

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Abstract

The invention discloses a tunable optical filter based on a PVDF terpolymer which is provided with a glass base plate plated with an antireflection coating, a medium high reflecting film, a metal film, a piezoelectric thin polymer film, a film electrode and an underlay from top to bottom in sequence. The two ends of the metal film, the piezoelectric thin polymer film and the film electrode are provided with glass micro-posts; or the invention is provided with the medium high reflecting film, an ITO film, the piezoelectric thin polymer film, an ITO film, the medium high reflecting film and the underlay in sequence from top to bottom. The invention utilizes the electric deformation effect of the piezoelectric polymer. The strain on the thickness direction of the PVDF terpolymer film prepared by the invention is larger than 15 percent under the action of an electric field of 30V / Mu m. The piezoelectric thin polymer film with larger electric deformation effect has broad application prospect in the application of a tunable optical apparatus part.

Description

technical field [0001] The invention relates to the technical field of optoelectronic thin film devices, in particular to a tunable optical filter based on PVDF terpolymer. Background technique [0002] In order to meet the needs of modern optical communication, optical information processing and other application fields, optoelectronic devices are developing in the direction of miniaturization and integration. Several foreign companies have introduced tunable filters based on liquid crystal electro-optic effects, but due to the slow response speed, strong temperature dependence and the state of the liquid crystal medium itself, the spectral tuning range is narrow, and the practical application is very limited. However, the inorganic material lithium niobate cannot meet the requirements of practical application because of its small electro-optic effect. [0003] Polymer materials are emerging materials developed and applied in the field of optoelectronics after inorganic ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/061
Inventor 甄红宇叶辉刘旭朱德喜周可予
Owner ZHEJIANG UNIV
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