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Adjustable optical frequency comb based on lithium niobate microcavity and preparation method thereof

A lithium niobate and microcavity technology, which is applied in optics, lasers, nonlinear optics, etc., can solve the problem of not being able to simultaneously prepare microcavities and integrated electrode structures that can generate optical frequency combs, and achieve the effect of improving roughness

Active Publication Date: 2020-05-08
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a tunable optical frequency comb based on lithium niobate microcavity and its preparation method in order to overcome the deficiency that the existing technology cannot simultaneously prepare a microcavity and an integrated electrode structure capable of producing an optical frequency comb

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  • Adjustable optical frequency comb based on lithium niobate microcavity and preparation method thereof
  • Adjustable optical frequency comb based on lithium niobate microcavity and preparation method thereof
  • Adjustable optical frequency comb based on lithium niobate microcavity and preparation method thereof

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Embodiment 1

[0031] refer to figure 1 , the preparation method of the present invention comprises the following steps:

[0032] Step 1: Prepare lithium niobate thin film material and chrome-plate it

[0033] The lithium niobate thin film material has three layers: the first layer is a lithium niobate single crystal thin film 1 with a thickness of 900nm; the second layer is a silicon dioxide layer 2 with a thickness of 2 μm; the third layer is a lithium niobate base layer 3 with a thickness of 500 μm. A chromium film layer 4 with a thickness of 600 nm is plated on the surface of the lithium niobate thin film material.

[0034] Step 2: Femtosecond laser direct writing

[0035] The lithium niobate thin film material coated with a chromium film on the surface is fixed on a three-dimensional computer programmable control displacement platform, and a femtosecond laser 6 with a power of 40mW is focused on the said On the chromium film layer 4 on the surface of the thin film material, drive the...

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Abstract

The invention discloses an adjustable optical frequency comb based on a lithium niobate microcavity and a preparation method of the adjustable optical frequency comb. The method comprises the following steps: preparing the lithium niobate microcavity and an integrated electrode on a lithium niobate thin film material by combining femtosecond laser direct writing with a chemical mechanical polishing technology, and regulating and controlling the lithium niobate microcavity for generating the optical frequency comb through the integrated electrode, thereby realizing the micro-nano structure based on the lithium niobate microcavity adjustable optical frequency comb. The adjustable optical frequency comb based on the lithium niobate microcavity has the advantages of being capable of being designed at will in space shape, adjustable in size, high in regulation and control efficiency and high in regulation and control range, and has great application prospects in the high-tech fields of optical clocks, optical communication, precision spectrum detection, quantum computing and the like.

Description

technical field [0001] The invention relates to a unique structure of a micro-nano optoelectronic device and the technical field of preparation thereof, in particular to a method for preparing an adjustable optical frequency comb on the surface of a lithium niobate thin film by using femtosecond laser direct writing combined with chemical mechanical polishing technology. The invention is suitable for preparing the micro-nano structure of adjustable optical frequency comb composed of micro-cavities and integrated electrodes on the surface of various film materials. Background technique [0002] The concept of an optical frequency comb (abbreviated as an optical frequency comb) was proposed in the 1970s. An optical frequency comb represents a discrete, equidistant optical frequency sequence in the frequency domain, and an ultrashort optical pulse sequence in the time domain. It is a very important tool in the fields of timing, optical communication, precision measurement, and ...

Claims

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Application Information

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IPC IPC(8): H01S3/108H01S3/094G02F1/35
CPCG02F1/353H01S3/094H01S3/108
Inventor 程亚方致伟卢涛王哲汪旻
Owner EAST CHINA NORMAL UNIVERSITY
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