本文選題：扭轉(zhuǎn)型高雙折射光纖 + 偏振態(tài)��； 參考：《浙江大學(xué)》2016年碩士論文

【摘要】：扭轉(zhuǎn)型高雙折射光纖因其對圓偏振光的保偏能力,有著廣闊的應(yīng)用前景,可以廣泛的應(yīng)用在傳感領(lǐng)域,比如電流互感器、光纖陀螺等方面�，F(xiàn)在比較成熟的保偏光纖包括低雙折射保偏光纖和高雙折射保偏光纖。低雙折射保偏光纖是通過降低光纖本身的雙折射效應(yīng)來保持光的偏振度,但是這種光纖對外部的環(huán)境非常的敏感,比如溫度、外部應(yīng)力等。而高雙折射光纖是增強(qiáng)光纖本身的雙折射效應(yīng),使外部因素可以忽略不計(jì)。目前一般所用的都是高雙折射保偏光纖。但是我們在電流互感器中使用該光纖時(shí)需要將其纏繞在電流導(dǎo)體上,所以隨之而來是應(yīng)力區(qū)也會隨之改變,那么經(jīng)過準(zhǔn)直進(jìn)入的線偏振光也會隨著應(yīng)力區(qū)的改變,偏振特性發(fā)生變化,不能保持其完整的線偏振性。這時(shí)扭轉(zhuǎn)型高雙折射光纖就可以發(fā)揮重要的作用。扭轉(zhuǎn)型高雙折射光纖是在高雙折射光纖的基礎(chǔ)上以一定的扭轉(zhuǎn)率扭轉(zhuǎn)得來的,所以它本身的雙折射效應(yīng)可以使外部扭轉(zhuǎn)所產(chǎn)生的影響忽略不計(jì)。相比于高雙折射光纖,扭轉(zhuǎn)型高雙折射光纖還不需要精確的準(zhǔn)直,使其在使用時(shí)更加的方便。隨著人們對精確測量的要求越來越高,該種光纖將會得到更大的重視。但因?yàn)橹圃旃に嚿系碾y度,也使得它的發(fā)展比較緩慢。本文主要工作內(nèi)容如下：1.從偏振理論出發(fā),描述了光的偏振性,分析了偏振模色散對傳輸光偏振特性的影響。在通過對光纖耦合理論及扭轉(zhuǎn)型高雙折射光纖的理論研究,得出了該光纖的耦合模特性,被加工光纖的要求及溫度對扭轉(zhuǎn)型高雙折射光纖的影響。2.完成了對扭轉(zhuǎn)型高雙折射光纖制備裝置的設(shè)計(jì),包括主要元器件的選型,機(jī)械結(jié)構(gòu)的設(shè)計(jì),加熱方式的確定,控制系統(tǒng)的軟硬件設(shè)計(jì)。3.通過對扭轉(zhuǎn)型高雙折射光纖制備裝置的實(shí)驗(yàn)及扭轉(zhuǎn)型高雙折射光纖的性能測試,不斷提出系統(tǒng)的改進(jìn)方案,并且得到了在該系統(tǒng)下最佳的加工參數(shù)并創(chuàng)新的提出了新的加工方式。
[Abstract]:Torsional high birefringence fiber has a broad application prospect because of its ability to preserve polarization of circular polarized light. It can be widely used in sensing fields, such as current transformer, fiber optic gyroscope and so on. Now, the mature polarization maintaining fiber includes low birefringence polarization maintaining fiber and Gao Shuang refraction polarization maintaining fiber. Low birefringence polarization maintaining fiber is adopted. Reduce the birefringence effect of the fiber itself to maintain the degree of polarization of the light, but the fiber is very sensitive to the external environment, such as the temperature and the external stress. The high birefringence fiber is the birefringence effect of the enhancement of the fiber itself, and the external factors can be ignored. When we use the optical fiber in the current transformer, it needs to be entangled in the current conductor, so the stress zone will change with it, then the linearly polarized light passing through the collimation will change with the stress region, and the polarization characteristics can not be maintained. The torsional high birefringence fiber will be possible. The torsional high birefringence fiber is torsional on the basis of a high birefringence fiber, so its birefringence effect can be ignored by its own birefringence effect. Compared to the high birefringent fiber, the torsional high birefringent fiber does not require accurate collimation. It is more convenient in use. With the increasing demand for accurate measurement, this kind of fiber will be paid more attention. But because of the difficulty in the manufacturing process, it makes its development slow. The main work of this paper is as follows: 1. from the polarization theory, the polarization of light is described, and the polarization mode dispersion is analyzed. The influence of the polarization characteristics of the light transmission. Through the theoretical study of the optical fiber coupling theory and the torsional high birefringence fiber, the coupling model of the optical fiber is obtained. The requirements of the processed fiber and the influence of temperature on the torsional high birefringent fiber.2. complete the design of the torsion type high birefringence fiber preparation device, including the main components. Type selection, design of mechanical structure, determination of heating mode, and hardware and software design of control system.3., through the experiment of torsion type high birefringence fiber preparation device and performance test of torsional high birefringence fiber, the improvement scheme of the system is put forward, and the best processing parameters under the system and innovation are put forward. The processing method.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN253

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