Preparation device and preparation method for one-dimension photonic crystal band-stop filter

Abstract

The invention discloses a preparation device and a preparation method for a one-dimension photonic crystal band-stop filter. The preparation device comprises a laser light source, a light beam expansion unit, a first reflection mirror and a second reflection mirror, wherein the included angle between the first reflection mirror and the horizontal plane is 44 to 46 DEG C, a red-sensitive photopolymer holographic plate to be treated is placed on the second reflection mirror, incidence light emitted out by the laser light source forms parallel beam expansion light after passing through the light beam expansion unit, the beam expansion light is directly emitted onto the holographic plate through being reflected by the first reflection mirror, the transmitted beam expansion beam is vertically emitted onto the second reflection mirror, the parallel reflection light reflected by the second reflection mirror and the directly emitted beam expansion light form two beams of coherence light in opposite directions inside the holographic plate, and the holographic plate is exposed. The preparation device has the advantages that a light path is simple, the cost is low, in addition, only the single beam light is adopted to be vertically emitted onto the ed-sensitive photopolymer holographic plate, and then, the second reflection mirror is utilized, so two beams of coherence light: the upper beam of coherence light and the lower beam of coherence light are formed inside the holographic plate, and the operation is very convenient.

Description

technical field [0001] The invention relates to a manufacturing technology of a photonic crystal filter, in particular to a manufacturing device and a manufacturing method of a one-dimensional photonic crystal band-stop filter. Background technique [0002] In 1987, Eli Yablonovitch of Bell Communications Institute and Sajeev John of Princeton University first proposed the concept of photonic crystal, which is a material structure whose dielectric constant (refractive index) changes periodically in space. So far, the theoretical and applied research of photonic crystals has developed rapidly, and various types of photonic crystals have been produced, among which one-dimensional photonic crystals, as the simplest structure, have been extensively studied and applied. One-dimensional photonic crystals are composed of media with different refractive indices arranged periodically in one-dimensional direction, similar to optical multilayer dielectric films, which have obvious phot...

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Problems solved by technology

Because this method needs to use a beam splitter to divide the parallel light into two beams of parallel light with equal spot size, light intensity, and angle, and then use two symmetrical and parallel reflectors to separate the two parallel beams after beam splitting. At the same time, it is necessary to ensure that the incident angle of the two reflected parallel lights is consistent with that of the dichromate gelatin holographic dry plate. The optical path is very complicated, so the actual operation is cumbersome and time-consuming, and it is not easy to operate, and it is difficult for the operator to calibrate the optical path. High proficiency and technical level are required

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