Application of Cu2MoS4 two-dimensional crystal and saturable absorber device comprising same

A two-dimensional crystal and absorber technology, applied in the field of nonlinear optical materials and devices, can solve problems such as application limitations of multi-atomic layer graphene, achieve excellent saturable 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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  • Application of Cu2MoS4 two-dimensional crystal and saturable absorber device comprising same
  • Application of Cu2MoS4 two-dimensional crystal and saturable absorber device comprising same

Examples

Experimental program
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Effect test

Embodiment 1

[0022] This example illustrates how to use chloroform as a dispersant to prepare Cu 2 MoS 4 A method for two-dimensional crystal organic dispersions as saturable absorbers.

[0023] (1) Take 0.171g CuCl 2 2H 2 O and 3.333g PVP were dissolved in 100mL of deionized water, stirred, and 10mL of NaOH solution with a concentration of 2mol / L and 10mL of sodium ascorbate solution with a concentration of 0.6mol / L were successively added dropwise. After 1 hour, a turbid yellow liquid was obtained, and centrifuged at 6500rpm for 5min. , washed three times with ethanol and deionized water, and dried in vacuum at 60°C for 5 hours to obtain Cu 2 O powder.

[0024] (2) Take 30mgNa 2 MoO 4 2H 2 O and 60 mg of thioacetamide were dissolved in 20 mL of ethylene glycol, and 20 mg of the Cu obtained in (1) was added 2 O powder, ultrasonicated in a water bath for 5 min, then transferred to a 50 mL reactor, and kept at 195 °C for 12 hours. Pour off the upper liquid, wash with deionized wate...

Embodiment 2

[0027] This example illustrates how to prepare Cu supported in the polymer polyvinyl alcohol (PVA) 2 MoS 4 Saturable absorbers in two-dimensional crystals.

[0028] (1) Take 0.171g CuCl 2 2H 2 O and 3.333g PVP were dissolved in 100mL of deionized water, stirred, and 10mL of NaOH solution with a concentration of 2mol / L and 10mL of sodium ascorbate solution with a concentration of 0.6mol / L were successively added dropwise. After 1 hour, a turbid yellow liquid was obtained, and centrifuged at 6500rpm for 5min. , washed three times with ethanol and deionized water, and dried in vacuum at 60°C for 5 hours to obtain Cu 2 O powder.

[0029] (2) Take 30mgNa 2 MoO 4 2H 2 O and 60 mg of thioacetamide were dissolved in 20 mL of ethylene glycol, and 20 mg of the Cu obtained in (1) was added 2 O powder, ultrasonicated in a water bath for 5 min, then transferred to a 50 mL reactor, and kept at 195 °C for 12 hours. Pour off the upper liquid, wash with deionized water and ethanol thr...

Embodiment 3

[0034] This example illustrates how to prepare Cu supported in the polymer polymethyl methacrylate (PMMA) 2 MoS 4 Saturable absorbers in two-dimensional crystals.

[0035] (1) Take 0.171g CuCl 2 2H 2 O and 3.333g PVP were dissolved in 100mL of deionized water, stirred, and 10mL of NaOH solution with a concentration of 2mol / L and 10mL of sodium ascorbate solution with a concentration of 0.6mol / L were successively added dropwise. After 1 hour, a turbid yellow liquid was obtained, and centrifuged at 6500rpm for 5min. , washed three times with ethanol and deionized water, and dried in vacuum at 60°C for 5 hours to obtain Cu 2 O powder.

[0036] (2) Take 30mgNa 2 MoO4 2H 2 O and 60 mg of thioacetamide were dissolved in 20 mL of ethylene glycol, and 20 mg of the Cu obtained in (1) was added 2 O powder, ultrasonicated in a water bath for 5 min, then transferred to a 50 mL reactor, and kept at 195 °C for 12 hours. Pour off the upper liquid, wash with deionized water and ethano...

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Abstract

The invention discloses an application of a Cu2MoS4 two-dimensional crystal and a saturable absorber device comprising the same. The saturable absorber device comprises a two-dimensional crystal packaged in a transparent container and used as a saturable absorber, and a substrate bearing the saturable absorber. The saturable absorber is a Cu2MoS4 two-dimensional layered crystal. A new material system with an excellent saturated absorption characteristic is discovered, and provides more opportunities for development of new saturable absorbers. The saturable absorber device has the advantages of being low in cost, being prepared in a large scale, having a small volume, and being capable of forming various types of mode locking devices, and can be applied to fields like pulse fiber lasers and so on.

Description

technical field [0001] The invention relates to nonlinear optical materials and devices, in particular to a Cu 2 MoS 4 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 choic...

Claims

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Application Information

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