Method for efficient deposition of tungsten sulfide on side surface of tapered optical fiber

A tapered optical fiber and tungsten sulfide technology, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problem of high cost, achieve long action distance, increase deposition speed and deposition volume

Active Publication Date: 2015-04-01
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0007] In short, the above methods are either expensive or not suitable for occasions that require a strong interaction between the light field and the material.

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  • Method for efficient deposition of tungsten sulfide on side surface of tapered optical fiber
  • Method for efficient deposition of tungsten sulfide on side surface of tapered optical fiber
  • Method for efficient deposition of tungsten sulfide on side surface of tapered optical fiber

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Embodiment Construction

[0028] The present invention will be further described below with reference to the drawings and embodiments, but the protection scope of the present invention should not be limited by this.

[0029] A method for depositing tungsten sulfide on the side of a tapered optical fiber may specifically include the following steps:

[0030] Step 1: Disperse tungsten sulfide powder in a highly volatile dispersant to prepare a dispersion, the concentration of the tungsten sulfide dispersion is 0.0001mg / ml to 1mg / ml;

[0031] Among them, the high volatile dispersant is a solvent (such as ethanol, acetone, etc.) that enables the tungsten sulfide material particles to exist stably, is not prone to agglomeration, and has high volatility. In a preferred embodiment of the present invention, the dispersant used is ethanol.

[0032] The preferred range of the concentration of tungsten sulfide is 0.001 mg / ml to 0.1 mg / ml. If the concentration is too low, it is difficult to achieve deposition, if the con...

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Abstract

A method for efficient deposition of tungsten sulfide on a side surface of a tapered optical fiber comprises steps as follows: a tungsten sulfide dispersion liquid is prepared; the tapered optical fiber is prepared from an ordinary single-mode optical fiber; an optical fiber in a tapering zone is immersed in the tungsten sulfide dispersion liquid; a laser with certain power is input from one end of the optical fiber, and output laser power changes are monitored by a laser power meter at the other end; the amount of the tungsten sulfide deposited on the side surface of the tapered optical fiber is controlled through control on the magnitude of the laser power input to the tapered optical fiber and the laser passing time. According to the method, all that is required is to use tungsten sulfide powder instead of preparing large-area tungsten sulfide materials, so that acting distances between optical fields and the tungsten sulfideare longer, more optical fields can interact with the tungsten sulfide, and the deposition speed and the deposition size of the tungsten sulfide can be significantly increased.

Description

Technical field [0001] The invention relates to a method for transferring tungsten sulfide to the side of an optical fiber, in particular to a method for efficiently depositing tungsten sulfide on the side of a tapered optical fiber. Background technique [0002] Transition metal sulfide is a kind of nanomaterial with a two-dimensional layered structure, which exhibits an adjustable band gap and rich optoelectronic properties, and is receiving more and more attention at home and abroad. As a transition metal sulfide, tungsten sulfide was confirmed to have saturated absorption characteristics in 2013 and was found to have optical nonlinearity in 2014. The experimental results of using tungsten sulfide as a saturable absorber for mode-locked lasers and Q-switched lasers have also been reported. Therefore, tungsten sulfide has broad application prospects in pulsed lasers, nonlinear optical fibers, optical signal processing and other fields. [0003] In order to enable the light fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
CPCC03C25/1061
Inventor 吴侃陈博华王昊朱邦圻陈建平
Owner SHANGHAI JIAO TONG UNIV
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