本文選題：二氧化碳激光 + 衰減全反射中紅外空芯光纖��； 參考：《華東師范大學(xué)》2017年碩士論文

【摘要】：以二氧化碳激光為代表的中紅外激光波長(zhǎng)位于8-14μm大氣窗口,在紅外激光雷達(dá)、紅外熱成像、化學(xué)傳感、窄禁帶半導(dǎo)體電子輸運(yùn)操控、激光醫(yī)療、材料成型加工等軍事或民用領(lǐng)域有重要應(yīng)用。衰減全反射型(ATR)空芯光纖傳輸二氧化碳激光具有結(jié)構(gòu)簡(jiǎn)單、無端面反射、傳輸模式好、能量損傷閥值高和輸出光束發(fā)散角小等優(yōu)點(diǎn),一直是該領(lǐng)域研究的重要課題之一。針對(duì)玻璃毛細(xì)管二氧化鍺空芯光纖容易脆性斷裂以及導(dǎo)熱性不良的問題,本課題組提出了用室溫液相沉積法制備金屬毛細(xì)管二氧化鍺全反射中紅外空芯光纖的思想。選用市面上品種和尺寸較多的不銹鋼毛細(xì)管作為光纖結(jié)構(gòu)管,首次探討了不銹鋼毛細(xì)管二氧化鍺全反射中紅外空芯光纖的低成本制備技術(shù),尤其是毛細(xì)管內(nèi)二氧化鍺反射膜的液相沉積工藝對(duì)其激光傳輸性能的影響。針對(duì)金屬毛細(xì)管空芯光纖傳輸高能激光可能導(dǎo)致金屬結(jié)構(gòu)管熱氧化損傷的問題,提出了用具有優(yōu)異耐高溫、抗氧化性能的鎳-鉻合金制備金屬毛細(xì)管二氧化鍺空芯光纖的思路。研究了該種光纖的制備工藝,分析討論了光纖的耐高溫氧化性能、傳輸二氧化碳激光的傳輸損耗、輸出激光光束的能量分布和發(fā)散角等內(nèi)容。空芯光纖在激光醫(yī)療、3D打印、焊接和切割金屬應(yīng)用中容易因?yàn)楸砻孢^熱而誤傷人體或發(fā)生熱氧化損壞。首次對(duì)金屬毛細(xì)管二氧化鍺衰減全反射空芯光纖傳輸激光的熱性能進(jìn)行了評(píng)估,對(duì)光纖傳輸激光時(shí)的軸向溫度分布進(jìn)行了理論模擬計(jì)算,并與實(shí)驗(yàn)測(cè)得的結(jié)果進(jìn)行了對(duì)比分析。依據(jù)理論和實(shí)驗(yàn)研究的結(jié)果,對(duì)不銹鋼和鎳-鉻合金毛細(xì)管二氧化鍺ATR空芯光纖在激光醫(yī)療、材料成型加工等實(shí)際應(yīng)用中傳輸激光的安全功率進(jìn)行了評(píng)估,為該類光纖的實(shí)際應(yīng)用提供了理論和技術(shù)支持。
[Abstract]:The wavelength of mid-infrared laser, represented by carbon dioxide laser, is located in the atmospheric window of 8-14 渭 m, in infrared lidar, infrared thermal imaging, chemical sensing, narrow gap semiconductor electron transport control, laser medical treatment, Material molding processing and other military or civil areas have important applications. Attenuated Total Reflectance (ATR) hollow fiber transmission carbon dioxide laser has many advantages such as simple structure, no end reflection, good transmission mode, high energy damage threshold and small divergence angle of output beam. It has been one of the important research topics in this field. In order to solve the problems of brittle fracture and poor thermal conductivity of glass capillary GE _ 2O _ 2 hollow fiber, the idea of fabricating metal capillary GE _ 2O _ 2 total reflection mid-infrared hollow fiber by liquid phase deposition at room temperature was proposed. In this paper, stainless steel capillaries, which are widely available in the market, are selected as fiber structure tubes. The low cost preparation technology of stainless steel capillary GE _ 2O _ 2 total reflection mid-infrared hollow fiber is discussed for the first time. In particular, the effect of liquid deposition of germanium oxide reflective film in capillary on the laser transport performance is investigated. In view of the problem that high energy laser transmission in hollow core fiber of metal capillary may lead to thermal oxidation damage of metal structure tube, the idea of preparing metal capillary germanium oxide hollow fiber with Ni-Cr alloy with excellent high temperature resistance and oxidation resistance is put forward. The preparation process of this kind of fiber is studied. The properties of high temperature oxidation resistance, transmission loss of carbon dioxide laser, energy distribution and divergence angle of the output laser beam are analyzed and discussed. Hollow fiber can easily damage human body or thermal oxidation in laser medical 3D printing, welding and cutting metal applications because of surface overheating. The thermal properties of GE _ 2O _ 2 attenuated hollow-core optical fiber transmission in metal capillary are evaluated for the first time. The axial temperature distribution of optical fiber transmission is theoretically simulated and compared with the experimental results. Based on the theoretical and experimental results, the safe power of laser transmission in practical applications of stainless steel and Ni-Cr alloy capillary germanium oxide ATR hollow fiber in laser medical treatment and material processing is evaluated. It provides theoretical and technical support for the practical application of this kind of optical fiber.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN253

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本文編號(hào)：2084149