本文選題：中紅外 + 光子帶隙��； 參考：《燕山大學》2013年博士論文

【摘要】：本文首先回顧了紅外傳能光纖的發(fā)展史，尤其是對用于傳輸波長10.6μm的CO_2激光空芯氧化物介質(zhì)光纖的探索與發(fā)展現(xiàn)狀進行了論述。從理論上分析了衰減全反射(ATR)光纖在中紅外波段折射率n_r1的特征，通過射線理論和光纖理論闡述Ge/GeO_2雙層介質(zhì)膜空芯光纖的傳輸機理，運用光子帶隙理論設計并制備出微結構空氣孔為包層的Ge/GeO_2雙層介質(zhì)膜空芯光纖，，改進了MCVD與拉絲一體化的工藝及設備，發(fā)展了相應的制備技術，并針對其在醫(yī)療診斷和工藝加工等方面進行了應用研究。 從理論上分析了氧化物材料在中紅外波段n_r1的特征，利用K-K關系，并通過實驗測出材料正入射反射譜，由此計算出在反常色散區(qū)的復折射率n+ik。應用光子晶體的帶隙理論，設計并制備出具有光子帶隙效應和nr 1機理的帶有光子晶體光纖結構的空芯傳能光纖。 采用改進的化學氣相沉積(MCVD)方法與拉制一體化技術進一步制備出純GeO_2膜的空芯光纖，通過氧化還原反應，將部份多晶態(tài)GeO_2介質(zhì)膜還原成富Ge層，由此成功地制備出以超微結構的多晶態(tài)GeO_2為基的雙層介質(zhì)膜空芯傳能光纖，同時進行了多種狀態(tài)下的損耗測試。采用紫外光(UV)固化法在空芯傳能光纖的外表面涂覆硅膠，以加強光纖的機械強度和柔軟性。另外，本論文還采用Auastar360FTIR紅外光譜儀以及KYKY-2800型掃描電鏡等設備對制備的光纖樣品進行了性能檢測和實驗分析。實驗結果表明：用改進的MCVD與拉絲一體化設備拉制中紅外傳能光纖具有非常好的光學特性。 提出測量傳輸CO_2激光能量光纖的能量分布的新實驗方案，首次使用針孔掃描法、熱敏直接曝光法。通過實驗比較，得到了熱敏直接曝光法效果較好，并根據(jù)光斑的照射時間繪制出了光纖輸出光模式的變化。本論文還對具有自主知識產(chǎn)權的光纖雙透鏡、三透鏡聚焦系統(tǒng)進行了設計，并通過實驗研究了由不同透鏡組成的光學系統(tǒng)對光束聚焦及縮束作用的影響。 將已制備的新型結構的中紅外傳輸CO_2激光能量光纖用于醫(yī)療臨床開展實驗。通過研制“帶光纖的CO_2激光治療機”應用于腹腔手術說明了光纖所具有的獨特優(yōu)勢，也為腹腔鏡進入人體進行微創(chuàng)手術提供了前期準備。同時，還利用自主研制的新型中紅外光纖配合醫(yī)學紅外光譜儀在生物體表進行檢測，經(jīng)光譜檢測分析，該光纖可傳輸波長為3~12μm，并且中間沒有出現(xiàn)大的吸收峰，完全達到了臨床使用的要求。
[Abstract]:In this paper, the history of red external energy transfer fiber is reviewed, especially the exploration and development of hollow oxide dielectric fiber of CO_2 laser used for transmitting wavelength 10.6 渭 m.In this paper, the characteristics of attenuated total reflectance (n_r1) fiber in the mid-infrared band are analyzed theoretically. The propagation mechanism of Ge/GeO_2 double-layer dielectric film hollow core fiber is expounded by ray theory and fiber theory.The hollow fiber with Ge/GeO_2 bilayer dielectric film was designed and fabricated by using photonic band gap theory. The process and equipment of integration of MCVD and wire drawing were improved, and the corresponding fabrication technology was developed.And it is applied in medical diagnosis and processing.In this paper, the characteristics of n_r1 in the mid-infrared band of oxide materials are theoretically analyzed. By using K-K relation, the normal incident reflectance spectra of the materials are measured experimentally, and the complex refractive index n iks in the anomalous dispersion region are calculated.Based on the bandgap theory of photonic crystal, an empty core energy transfer fiber with photonic crystal fiber structure is designed and fabricated with photonic bandgap effect and nr1 mechanism.The hollow fiber of pure GeO_2 film was further prepared by the improved chemical vapor deposition (CVD) method and the integrated technique of drawing. Through the redox reaction, some polycrystalline GeO_2 dielectric films were reduced to GE rich layer.Based on the ultrastructural polycrystalline GeO_2, a double-layer dielectric film hollow core energy transfer fiber has been successfully prepared, and the loss measurement has been carried out at the same time.In order to enhance the mechanical strength and softness of the hollow energy transfer fiber, the external surface of the hollow energy transfer fiber was coated with silica gel by UV curing method.In addition, Auastar360FTIR infrared spectrometer and KYKY-2800 scanning electron microscope were used to test and analyze the properties of the optical fiber samples.The experimental results show that the improved MCVD and wire drawing equipment has very good optical properties.A new experimental scheme for measuring the energy distribution of CO_2 laser optical fiber is proposed. The method of pinhole scanning and thermal direct exposure is used for the first time.The experimental results show that the heat sensitive direct exposure method is effective and the output mode of the optical fiber is plotted according to the irradiation time of the spot.In this thesis, the optical double lens and three lens focusing system with independent intellectual property rights are designed, and the effect of the optical system composed of different lenses on the beam focusing and beam shrinking is studied experimentally.A new type of CO_2 laser energy fiber with a new structure has been prepared and used in medical clinic.The application of "CO_2 laser therapy machine with optical fiber" in celiac surgery shows the unique advantages of optical fiber, and provides preliminary preparation for laparoscopy to enter human body for minimally invasive surgery.At the same time, the newly developed medium infrared optical fiber was also used to detect the biological surface with the medical infrared spectrometer. The optical fiber can be transmitted at a wavelength of 312 渭 m by spectral analysis, and there is no large absorption peak in the middle.It completely meets the requirement of clinical use.
【學位授予單位】：燕山大學
【學位級別】：博士
【學位授予年份】：2013
【分類號】：TN253

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