Method for manufacturing infrared hollow optical fiber
A hollow-core optical fiber and infrared technology, which is applied in the field of optoelectronic materials, can solve the problems of high process difficulty, low fiber power threshold, and long production cycle, and achieve the effects of simple process, convenient control, and reduced surface roughness
Inactive Publication Date: 2014-06-11
FUDAN UNIV
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Problems solved by technology
Metal / polymer hollow-core fibers are commonly used in the visible-near-infrared wavelength range. The disadvantages are that the production cycle is long and the process is difficult; and the obtained fiber power threshold is low.
However, traditional metal / metal halide hollow-core fibers with higher power thresholds can only achieve low loss in the mid-to-far infrared wavelength range.
Method used
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Embodiment Construction
[0018] The present invention is further described below by way of examples.
[0019] First, use SnCl with a mass concentration of 0.1% 2 The aqueous solution activates the surface of the inner wall of the hollow-core optical fiber capillary, and through this step, the speed of the next step of silver film deposition can be accelerated and the surface roughness of the silver film can be reduced; The inner wall of the tube is coated with a silver film. Then, use alcohol as the solvent of iodine simple substance, and carry out iodination reaction with a certain concentration of iodine solution. During the reaction, a vacuum pump was used to extract the iodine alcohol solution at a certain flow rate. By adjusting the concentration of the iodine alcohol solution and the iodination reaction temperature, the iodination reaction speed is controlled, and then the iodination reaction time is controlled to obtain silver iodide with different thicknesses.
[0020] Specific operation st...
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The invention belongs to the technical field of optoelectronic materials and particularly discloses a method for manufacturing an infrared hollow optical fiber. The method for manufacturing the infrared hollow optical fiber comprises the following steps: firstly, treating and activating the surface of the inner wall of a hollow optical fiber capillary tube by using a water solution of SnCl2; secondly, plating a layer of silver film on the inner wall of the capillary tube according to a principle of silver mirror reaction; and finally, iodizing the silver film on the inner wall of the capillary tube by using an alcohol solution of iodine to obtain an infrared optical fiber with an Ag / AgI structure. By controlling the concentration and the flow speed of the alcohol solution of iodine, the temperature and the time of the iodization reaction and the like, the infrared hollow optical fiber with a specific low-loss window within an infrared wavelength range can be manufactured; and compared with the conventional method in which a cyclohexane solution of iodine is used, the method for manufacturing the infrared hollow optical fiber has the advantages that the surface roughness of each film layer can be greatly reduced, the optical fiber manufactured by the method provided by the invention can realize the low loss in the near infrared wavelength band of 1mm, and the application range of the infrared optical fiber with the Ag / AgI structure is greatly widened.
Description
technical field [0001] The invention belongs to the technical field of optoelectronic materials, and in particular relates to a method for manufacturing an infrared hollow-core optical fiber. Background technique [0002] Infrared hollow core fiber uses air or other gases and liquids as the main propagation medium of light, which has the advantages of small material dispersion, small absorption, high nonlinear effect threshold, etc., and has low loss in the infrared wavelength range; it can be used to transmit light, and make Various optoelectronic devices, gas or liquid sensors, etc., are widely used in medical, scientific research, industry and other fields. [0003] The existing infrared hollow-core optical fibers are mainly divided into three categories: the first category is a total reflection hollow-core optical fiber made of sapphire and other materials, and the cost is relatively high. The second type is leaky hollow-core optical fiber, which is coated with a reflec...
Claims
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IPC IPC(8): C03C25/52
Inventor 曾旋孙帮山石艺尉
Owner FUDAN UNIV