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Use of SrCuSi4O10 two-dimensional crystal and saturated absorber device formed by the same

A technology of two-dimensional crystals and absorbers, which is applied in the field of nonlinear optical materials and devices, can solve problems such as application limitations of multi-atomic layer graphene, achieve excellent saturated absorption characteristics, and reduce costs

Inactive Publication Date: 2015-11-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characteristics of graphene saturable absorbers depend on the unique Dirac band structure of single-atom-thick graphene. As the number of atomic layers increases, the carrier mobility decreases sharply, and the properties such as energy band structure and light absorption characteristics change greatly. , so that the application of multi-atomic layer graphene is limited

Method used

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  • Use of SrCuSi4O10 two-dimensional crystal and saturated absorber device formed by the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example illustrates how to prepare SrCuSi supported in the polymer polyvinyl alcohol (PVA) 4 o 10 Saturable absorbers in two-dimensional crystals.

[0026] (1) 0.15g of SrCuSi 4 o 10 The crystals were added to 20ml hydrochloric acid solution of 3mol / L, ultrasonically treated, and left to stand for 12 hours, 2 / 3 of the supernatant was taken for centrifugation, and washed with deionized water for 3 times to obtain a two-dimensional layered SrCuSi 4 o 10 single crystal. Finally dispersed in 3ml deionized water.

[0027] (2) Disperse 0.2g of PVA powder in 4ml of deionized water and stir at 80°C for 2h to dissolve the powder.

[0028] (3) Mix 4ml of PVA aqueous solution and 3ml of SrCuSi 4 o 10 Mix the aqueous solution evenly, pour it into a watch glass with a smooth surface, and place it horizontally in a drying oven to dry for two days to obtain a flat and dry PVA film.

[0029] (4) Select the part with uniform thickness as a saturable absorber device. Using...

Embodiment 2

[0031] This example illustrates how to prepare a saturable absorber of two-dimensional crystals of SrCuSi4O10 supported in the polymer polymethylmethacrylate (PMMA).

[0032] (1) 0.15g of SrCuSi 4 o 10 The crystals were added to 20ml hydrochloric acid solution of 3mol / L, ultrasonically treated, and left to stand for 12 hours, 2 / 3 of the supernatant was taken for centrifugation, and washed with deionized water for 3 times to obtain a two-dimensional layered SrCuSi 4 o 10 single crystal. Finally dispersed in 3ml of N-vinylpyrrolidone (NVP).

[0033] (2) Disperse 0.2g PMMA powder in 4ml NVP, stir for 2h to dissolve the powder, and then mix with (1) obtained SrCuSi 4 o 10 The NVP solution was mixed.

[0034] (3) Spin-coat the solution obtained in (2) on a glass sheet with a thickness of about 0.2 mm at a speed of 1000 rpm, and place it horizontally in a drying oven at 90 ° C for 24 hours under 0.5 MPa pressure to make the solvent completely Volatilize to get a flat and dry ...

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Abstract

The invention discloses a use of a SrCuSi4O10 two-dimensional crystal and a saturated absorber device formed by the same. The saturated absorber device comprises a two-dimensional crystal packaged in a transparent container to serve as a saturated absorber and a substrate for loading the saturated absorber, the saturated absorber is a SrCuSi4O10 two-dimensional layered crystal and is mainly composed of Sr, Cu, Si and O atoms in a molar ratio of 1:1:4:10, and the saturated absorber is prepared by stripping a SrCuSi4O10 three-dimensional crystal by using an acid solution. A new material system with excellent saturated absorption properties is found in the invention for providing a larger space for developing new saturated absorbers, the device has the advantages of being low in cost, suitable for mass production, small in volume and capable of forming a variety of mode locking devices, so that the device can be applied to such fields as pulse fiber lasers, etc.

Description

technical field [0001] The invention relates to nonlinear optical materials and devices, in particular to a SrCuSi 4 o 10 The use of two-dimensional crystals and the saturable absorber device formed by them can be used for mode-locking, Q-switching, and laser beam shaping of fiber lasers. Background technique [0002] Pulsed lasers are playing an increasingly important role in the fields of laser manufacturing, processing, and scientific research. With the continuous development of Q-switching and mode-locking technology and laser gain media, pulsed output can be obtained from many different wavelength laser systems. There are mainly two ways to generate pulses, active and passive. Active modulation requires an external modulator (acousto-optic / electro-optic modulator) in the laser cavity, which not only increases system cost, but also reduces system portability; while passive modulation does not require any external Devices have gradually become the current mainstream ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/067H01S3/11
Inventor 郭强兵刘小峰邱建荣
Owner ZHEJIANG UNIV