Method for manufacturing tera-hertz fiber gratings and the device thereof
A fiber grating, terahertz technology, applied in the optical field, can solve the problems of lack of filters and no technical solutions, and achieve the effect of low cost and simple production
Inactive Publication Date: 2012-11-21
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology
However, in terms of terahertz spectrum control, there is currently no reliable technical solution
At present, the terahertz spectrum is basically determined by the method of generating terahertz waves, and there is an extreme lack of filters for subsequent selection of terahertz spectrum
Method used
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[0016] Such as figure 1 As shown, the laser output from the carbon dioxide laser 1 is focused on the microplastic sleeve 3 after being passed through the laser focusing system 2; one end of the microplastic sleeve 3 is connected, and the other end is connected to a vacuum pump 6; the clamp 4 clamps the microplastic sleeve 3 , so that it is fixed on the linear displacement platform 5 .
[0017] A specific method for making a terahertz fiber grating includes the following steps:
[0018] (1) Select the appropriate microplastic sleeve according to the working wavelength of the terahertz fiber grating (λ≈300μm). The material of the microplastic sleeve selected in this embodiment is high-density polyethylene (HDPE). Partial enlarged structure of microplastic sleeve 3-1 is as follows figure 2 As shown, its outer diameter is D=300 μm, and its inner diameter is d=13.5 μm; the length of the microplastic casing is about 1 meter.
[0019] (2) One end of the selected microplastic sle...
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The invention relates to a method for manufacturing tera-hertz fiber gratings and the device thereof. As the reliability of the existing spectrum control is poor, the method of the invention first employs suitable micro plastic casings, the one end of the micro plastic casing is terminated, the other end of the micro plastic casing is connected with a vacuum pump and then the micro plastic casingis fixed on a linear displacement platform, a laser focusing system is adjusted and finally a carbon dioxide laser is started up to soften the area where the laser is focused on the micro plastic casing; a through hole arranged on the internal diameter area of the corresponding micro plastic casing is sealed and the tera-hertz fiber grating is obtained by repeating the steps in the next cycle length. Clamping apparatuses are arranged on both sides of the linear displacement platform of the device of the invention and the laser focusing system and carbon dioxide laser are arranged above the medial positions of the two clamping apparatuses; the vacuum pump is connected with the other end of the micro plastic casing in a sealed manner. The method for manufacturing tera-hertz fiber gratings and the device thereof has the advantages of simple manufacturing and low cost.
Description
technical field [0001] The invention belongs to the field of optical technology, in particular to the field of terahertz technology, and relates to a method for manufacturing a terahertz fiber grating based on a microplastic sleeve and equipment for realizing the method. Background technique [0002] The subject of terahertz is an interdisciplinary subject that studies electromagnetic waves between microwaves and light waves and their applications, involving electronics, optics and other disciplines. Terahertz technology has unique advantages in sensing, imaging, and other fields, so it has important application value in many fields involving material detection, such as public safety, industrial production, aerospace, and military. One of the most critical technologies to realize terahertz applications is to realize the propagation and control of terahertz waves. Plastic optical fiber is the most important device to realize terahertz low-loss propagation. The control of te...
Claims
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IPC IPC(8): G02B6/02
Inventor 陈达如
Owner ZHEJIANG NORMAL UNIVERSITY