Method for preparing non-periodic optical superlattic titanium diffused waveguide

An optical superlattice, titanium diffusion technology, applied in lasers, laser parts, electrical components, etc., can solve the problems of complex structure, unadjustable wavelength interval of 18 output lasers, etc., to achieve the effect of easy integration and cost reduction

Inactive Publication Date: 2010-08-04
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Although this method can be used to obtain 18 laser outputs at room temperature, the disadvantages of this scheme are: f

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  • Method for preparing non-periodic optical superlattic titanium diffused waveguide
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  • Method for preparing non-periodic optical superlattic titanium diffused waveguide

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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0026] Select a Z-cut lithium niobate wafer with a magnesium-doped molar ratio of 5%, first fabricate a titanium diffusion waveguide structure on the -Z plane of the wafer, and then fabricate an aperiodic optical superlattice on the +Z plane of the wafer: by The wafer was polarized with an electric field at room temperature to achieve domain flipping of the crystal polarization.

[0027] The specific implementation steps are as follows:

[0028] (1) Choose a Z-cut magnesium-doped lithium niobate wafer with a size of 20x10x1mm and a thickness of 1mm with a 5% mol doping ratio. The + / -Z surfaces are all polished, an...

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Abstract

The invention relates to a method for preparing a non-periodic optical superlattic titanium diffused waveguide, which belongs to the technical field of laser generators. A titanium diffusion technology is adopted on the -Z surface of a lithium niobate wafer. Pre-splash titanium bars on the -Z surface are diffused inwards to the substrate of the lithium niobate wafer to form a waveguide layer. Then, room-temperature electric field polarization is carried out to change the polarizing direction of the electric domain structure of the lithium niobate wafer, thereby obtaining the titanium diffused waveguide structure. The invention has the advantages that the multi-wavelength laser can stably work at room temperature and is not sensitive to the outside environment; the device is simple and has novel structure and low cost; the method effectively avoids the uniform gain spread effect of doped optical fibers in the traditional multi-wavelength laser; by changing the inputted wavelength of the pumping light, the wavelength or the wavelength interval of the output laser can be flexibly adjusted.

Description

technical field [0001] The invention relates to a preparation method in the technical field of laser generators, in particular to a preparation method for an aperiodic optical superlattice titanium diffusion waveguide used for adjustable multi-wavelength lasers. Background technique [0002] An important problem to be overcome in the existing tunable multi-wavelength fiber lasers at room temperature is how to effectively suppress the uniform gain broadening effect of doped fibers. When the output wavelength interval of a multi-wavelength fiber laser is smaller than the uniformly broadened linewidth of the gain fiber, severe mode competition and mode hopping inevitably exist. Although there are already some methods to achieve multi-wavelength output, such as using the four-wave mixing (FWM) effect to obtain stable multi-wavelength output at room temperature, multi-wavelength erbium-doped fiber lasers based on nonlinear polarization rotation (NPR), and erbium-doped fiber laser...

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Application Information

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IPC IPC(8): H01S3/094H01S3/10
Inventor 陈玉萍瞿刚陈险峰
Owner SHANGHAI JIAO TONG UNIV
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