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題名 | Thermally Induced Microbending Losses in Tightly-jacketed Double-coated Optical Fibers at Low Temperature=低溫下在緊被覆雙鍍層光纖中熱力所引起之微曲損失 |
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作者 | 薛顯宗; 曾世德; | 書刊名 | 逢甲學報 |
卷期 | 27 1994.11[民83.11] |
頁次 | 頁469-477 |
分類號 | 440.33 |
關鍵詞 | 低溫; 微曲損失; 緊被覆雙鍍層光纖; 熱力; |
語文 | 英文(English) |
中文摘要 | 本文利用熱彈法分析在緊被覆雙鍍層光纖中溫降所引起之微曲損失。微曲損失是 由玻璃纖維之側壓力所決定,它正比於溫降並受塑膠鍍層的材料特性和厚度的影響。為了減 少微曲損失,我們發現第一和第二鍍層的包松比,以及被覆的厚度和楊氏係數必須增加。另 一方面,第一和第二鍍層的楊氏係數及第二鍍層的厚度必須減少。然而,第一鍍層的厚度存 在一最佳值。第一鍍層的玻璃轉化溫度必須低於所考慮的溫度範圍。 |
英文摘要 | The microbending losses induced by temperature drop in tightly-jacketed double-coated optical fibers have been analyzed by thermoelastic approach. The microbending loss is dominated by the lateral pressure in the glass fiber, which is proportional to the temperature drop and is a function of the physical properties of polymeric coatings and their thicknesses. To minimize such microbending loss, the Poisson's ratio of primary and secondary coatings, and thickness and Young's modulus of jacket should be increased. On the other hand, the Young's modulus of primary and secondary coatings, and the thickness of secondary coating should be decreased. However, the thickness of primary coating exists an optimum value. The glass transition temperature of primary coating should be lower than the temperature ranges under consideration. |
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