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Monopotassium phosphate monocrystal optical fiber as well as growth method and application thereof

A technology of phase potassium dideuterium phosphate single crystal and oblique phase potassium dideuterium phosphate single crystal, applied in the field of crystal materials, can solve the problems of low melting point, unsuitable for KDP type crystal single crystal optical fiber growth, etc., and achieves good repeatability and optical fiber. The effect of controllable diameter and high success rate

Active Publication Date: 2020-11-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting point of KDP-type crystal is low (<270°C), and melting crystals are prone to phase transition, so the above method is not suitable for the growth of KDP-type crystal single crystal optical fiber

Method used

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  • Monopotassium phosphate monocrystal optical fiber as well as growth method and application thereof
  • Monopotassium phosphate monocrystal optical fiber as well as growth method and application thereof
  • Monopotassium phosphate monocrystal optical fiber as well as growth method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for growing a tetragonal phase KDP single crystal optical fiber, comprising the following steps:

[0046] (1) Potassium dihydrogen phosphate (KDP) is added into ultrapure water, sealed and heated to dissolve to obtain a clear mass fraction of 28.5% potassium dihydrogen phosphate solution;

[0047] (2) Overheat the above-mentioned potassium dihydrogen phosphate solution at 80°C for 48 hours, then filter the above-mentioned solution into a growth tank with a 0.22 micron ultra-fine water film, and naturally cool to 25°C to obtain a supersaturated solution;

[0048] (3) Choose a tetragonal phase KDP crystal with a diameter of 5 μm and an aspect ratio of 50:1 as the seed crystal, plant it in the above-mentioned supersaturated solution, and grow the optical fiber crystal in the sealed state of the growth tank, and keep the growth tank in the growth process. The temperature is 25°C, the relative humidity of the environment is 30%, and the average growth rate is 1 μm / s...

Embodiment 2

[0053] A method for growing a tetragonal phase KDP single crystal optical fiber is as described in Example 1, except that the mass fraction of potassium dihydrogen phosphate solution is 26%, and the average growth rate is 0.3 μm / s. After planting the seeds, grow for eight hours to obtain a single crystal optical fiber with a diameter of 5 μm and a length of 8.6 mm. The obtained single crystal fiber has the frequency conversion performance of the single crystal fiber prepared in Example 1.

Embodiment 3

[0055] A method for growing a tetragonal phase KDP single crystal optical fiber is as described in Example 1, except that the mass fraction of potassium dihydrogen phosphate solution is 31%, and the average growth rate is 2.5 μm / s.

[0056] At this concentration, the optical fiber broadens slowly at a rate of 1.85nm / s. After growing for one hour, a single crystal optical fiber with a diameter of 11.7 μm and a length of 9 mm can be obtained. The obtained single crystal fiber has the frequency conversion performance of the single crystal fiber prepared in Example 1.

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Abstract

The invention provides a monopotassium phosphate monocrystal optical fiber as well as a growth method and application thereof. The monopotassium phosphate single crystal optical fiber is a tetragonalphase monopotassium phosphate single crystal optical fiber, a monoclinic phase monopotassium phosphate single crystal optical fiber, a tetragonal phase monodeuterium potassium phosphate single crystaloptical fiber or a monoclinic phase monodeuterium potassium phosphate single crystal optical fiber. The preparation method of the optical fiber comprises the following steps: adding potassium dihydrogen phosphate (KDP) into a solvent, sealing the mixture, heating the mixture and dissolving the KDP to obtain a clear potassium dihydrogen phosphate solution; overheating the obtained solution at 70-90 DEG C for 48 hours, then filtering the solution into a growth tank, and cooling the solution to 0-30 DEG C to obtain a supersaturated solution; and adding a seed crystal into the supersaturated solution, and growing the seed crystal in a growth tank in a sealed state to obtain the single crystal optical fiber. The growth method is high in success rate and good in repeatability. The optical fiberprovided by the invention has the advantages of great length-diameter ratio, controllable optical fiber diameter, smooth surface and high optical fiber quality, and can be applied to micro nonlinearfrequency conversion and preparation of electro-optical devices.

Description

technical field [0001] The invention relates to a potassium dihydrogen phosphate-based single crystal optical fiber and a growth method and application thereof, belonging to the technical field of crystal materials. Background technique [0002] KDP type crystal is a kind of nonlinear optical crystal, which is widely used in high-tech fields such as laser electro-optic modulation, frequency conversion, communication, etc., especially potassium dihydrogen phosphate (KDP, KH 2 PO 4 ) and diduterium potassium phosphate (DKDP, K(H 1-x D. x ) 2 PO 4 ) crystal is one of the most studied optoelectronic materials in the field of modern crystal physics and widely used in optical communication. Its unique piezoelectric, ferroelectric and electro-optical properties make it very important in the research of high-energy and ultrafast optoelectronics Applications. Because of its excellent birefringence and nonlinear properties, potassium dihydrogen phosphate (KDP) crystal has become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B7/08G02B6/02G02F1/35G02F1/355
CPCC30B29/22C30B7/08G02B6/02G02F1/35G02F1/353G02F1/3553
Inventor 任燕刘雪妮张承乾
Owner SHANDONG UNIV