Doped-layer-free photonic crystal optical fiber with filtering range of 430-630 nm and manufacturing method thereof

Abstract

The invention provides a doped-layer-free photonic crystal optical fiber with a filtering range of 430-630 nm and a manufacturing method thereof. The filter comprises a photonic crystal layer and lens glass, wherein the photonic crystal layer is arranged on the surface of the lens glass; the photonic crystal layer is of a (AB) 5 (BA) 5 composite structure which is formed by alternately overlapping 10 layers of A dielectric layers and 10 layers of B dielectric layers; a one-dimensional photonic crystal transmission property curve is simulated by a transmission matrix method and one photonic crystal optical fiber without a doped structure is designed on the base of theoretical analysis; and a simple non-doped photonic crystal structure is adopted and only the sequence of film plating is changed for one time, so that the machining difficulty and the requirement on the precision are greatly reduced. Proper photonic crystal structure parameters are selected according to the frequency of monochrome light to be transmitted, so as to realize the filter for monochrome light transmission and the one-dimensional photonic crystal optical fiber has 100% transmittance filtering effect for a selected-frequency monochrome light. A developed film plating technology can conveniently machine a one-dimensional photonic crystal film system on the surface of an optical lens. The doped-layer-free photonic crystal optical fiber with filtering range of 430-630 nm and the manufacturing method thereof can be widely applied to various optical instruments needing the monochrome light transmission.

Description

technical field [0001] The invention relates to the field of photonic crystals, in particular to a one-dimensional photonic crystal optical filter capable of high transmission of selected frequency monochromatic light and a manufacturing method thereof. Background technique [0002] Since E. Yablonovitch proposed the concept of photonic crystals independently in 1987 when he was studying how to suppress spontaneous emission and S. John was studying photon localization, the research on the structure, preparation and quantum electrodynamic properties of photonic crystals has attracted people's attention. been extensively studied. Most of the early research work focused on two-dimensional and three-dimensional photonic crystals. It was not until 1998 that Fink, Winn, Chigrin et al. started the research on one-dimensional photonic crystals. One-dimensional photonic crystals are simple in structure, easy to manufacture, and also have the properties of high-dimensional photonic c...

AI Technical Summary

Problems solved by technology

Common one-dimensional photonic crystal filters are photonic crystals with a doped structure, and specific doping defects are intentionally introduced to change the strict periodic structure of the photonic crystal. The filter structure made of this photonic crystal is unstable, and the filter effect Not obvious enough to be widely produced and promoted

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