Composite waveguide device capable of realizing light blocking effect

Abstract

The invention discloses a composite waveguide device capable of realizing a light blocking effect and a preparation method. The composite waveguide device capable of realizing the light blocking effect comprises a glass substrate and ion exchange strip waveguides with variable thicknesses and gradually-changed refractive indexes are prepared on the upper surface layer of the glass substrate by adopting a selective secondary ion exchange technique; the ion exchange strip waveguides comprise an input waveguide, a composite waveguide and an output waveguide from left to right in sequence; the composite waveguide is a multi-mode strip waveguide of optical waves with the wave length of 632.8nm formed by a stopping waveguide and an As2S8 thin film located at a windowing region of a metal Al film; the input waveguide and the output waveguide are mutually communicated and connected through the stopping waveguide; the input waveguide and the output waveguide are ion exchange single-mode strip waveguides of the optical waves with the wave length of 632.8nm; the stopping waveguide stops the optical waves with the wave length of 632.8nm. The composite waveguide device capable of realizing the light blocking effect disclosed by the invention can effectively realize the light blocking effect and can also realize good butt joint with an optical fiber.

Description

technical field [0001] The invention relates to a composite waveguide device capable of realizing light blocking effect, and belongs to the technical field of integrated optics and optical waveguide. Background technique [0002] Arsenic sulfide amorphous semiconductor has good transparency in the infrared band, and its optical nonlinear effect is two orders of magnitude higher than that of quartz glass, so it has attracted attention as a long-wavelength nonlinear optical medium. where As 2 S 3 The average coordination number of amorphous semiconductors is very close to the critical coordination number, and the structure and chemical properties are relatively stable. In As 2 S 3 The implementation of optical Kerr effect switches and optical nonlinear loop mirrors on glass fibers has been reported (Bureau B et al: J. Non-Cryst. Solids., Vol.345&346, p.276, 2004; Hocde S et al: J. Non-Cryst. Solids., Vol.274, p.17, 2000; Nishii J et al.: J. Non-Cryst. Solids., Vol.140, p.1...

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Problems solved by technology

[0003] One of the purposes of the present invention is to solve the problem that the end faces of As2S8 waveguides are difficult to grind and polish, Due to the low coupling efficiency between the waveguide and the fiber end face, a composite waveguide device and its preparation method that can realize the light blocking effect are proposed and experimentally studied

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