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研究生:徐斌峰
研究生(外文):Ping-Feng Hsu
論文名稱:新型共路外差干涉量測系統之研發
論文名稱(外文):Development of A New Common-Path Heterodyne Interferometric Measuring System
指導教授:羅裕龍
指導教授(外文):Yu-Lung Lo
學位類別:碩士
校院名稱:國立成功大學
系所名稱:機械工程學系碩博士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:151
中文關鍵詞:光彈外差干涉儀調變器雙折射材料共路干涉儀
外文關鍵詞:Common-Path InterferometryHeterodyne InterferometryModulatorPhotoelasticityBirefringence Material
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外差干涉技術是一重要的精密量測方法,據此所發展的感測系統可以在量測變化時有極佳的線性、穩定性與精密度。由此所設計的感測系統必須有調變訊號,將訊號作調變的方法有很多,其中以電光調變器是最典型的一種。

雙折射材料的雙折射特性是許多研究領域中熱門的一個話題,近來更對其相關晶體或生化物質的主軸軸向與外界的關係產生興趣。目前已有其他發表利用E-O modulator的外差調變技術來量測birefringence變化,也有利用Faraday Rotator的外差調變技術來測量雙折射晶體的主軸軸向。

本文將欲利用新式Synthetic Heterodyne解調變電路將共路干涉中試件的birefringence變化造成的相位延遲解析出來,並同時發展一套由共路干涉為基礎,配合電光調變器的量測系統,以達同時量測雙折射材料的birefringence及主軸軸向因外界影響所產生的變化。此方法論,在目前的文獻中是屬於創新的設計,若能設計出高敏感同時量測birefringence及主軸軸向變化的量測儀器,必對相關晶體與生化量測有其重要貢獻。
Heterodyne interferometry is an important technique for precise measurement. According to these developed sensing system, we can get the optimum linear stability and precision. This sensing system we developed must have modulated signal. There are many different methods to modulate signal. The most typical case of those modulation methods is by using electro-optic modulator.

The birefringent characteristic of birefringent material is a hot topic in many research fields. Recently years, we are interested in finding the relations between the principal axis direction changes in the environment. The heterodyne modulator techniques with an E-O modulator to measure the birefringence change and with a Faraday Rotator to measure the principal axis rotation have been presented.

In this study we want to use new Synthetic Heterodyne demodulation circuit to measure the phase retardation caused by the birefringence change. We also develop a measuring system based on the common-path interferometry and using the EO modulator in order to simultaneously measure the birefringence change and the principal axis rotation caused by the environment change. According to knowledge, this novel setup is first proposed in this study. Successfully, it would make a great contribution in the related crystal or biomaterial.
中文摘要 I
英文摘要 II
誌謝 III
目錄 .IV
圖目錄 VIII
表目錄 XIII


第一章 緒論

1.1 前言 1
1.2文獻回顧 2
1.3 研究方法 4
1.4 章節瀏覽 5

第二章 雙折射晶體材料

2.1晶體之光學定律 10
2.2相位延遲 14
2.3應力光學定律(Stress-Optic Law) 16

第三章 干涉理論

3.1傳統干涉原理 25
3.1.1光彈基本理論 26
3.2 外差干涉原理 33


第四章 電光晶體之調變原理

4.1 調變機構 42
4.1.1 機械式調變機構(mechanical type) 42
4.1.2 電子式調變機構(electrical type) 43
4.2 電光調變器(Electro-Optic Modulator) 45
4.2.1 線性電光效應 45
4.2.2 電光調變(Electro-Optic Modulation) 48
4.2.2.1 振幅調變(Amplitude modulation) 50
4.2.2.2 相位調變(Phase modulation) 53
4.3 電光晶體主軸之判定 54
4.4 總結 56


第五章 量測系統之建立

5.1 紡絲製程線上即時偵測系統 65
5.1.1 紡絲纖維之干涉條紋圖樣 66
5.1.2 Hi-Bi光纖量測系統 68
5.1.3 類外差訊號穩定度之影響 71
5.1.4 Hi-Bi光纖量測系統測試之步驟 72
5.2 訊號解調變系統 73
5.2.1 新式Synthetic Heterodyne相位解調變原理 74
5.2.2 Synthetic Heterodyne相位解調變電路性能分析 77
5.3 鎖相放大器的使用 78
5.4 電光晶體ADP模擬相位測試 79
5.4.1 ADP晶體相位量測架構之建立 79
5.4.2 Synthetic Heterodyne相位解調變電路性能分析 81
5.5 總結 84

第六章 其它形式光學量測系統之研發

6.1量測系統之光學架構 109
6.2新式量測系統相位解調變處理系統 113
6.3模擬量測結果與討論 119

第七章 總結與建議

7.1 總結 144
7.2 建議 146

參考文獻 148

自述
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Feng, C. M., Huang, Y.C., Chang, J.G., Chang, M. and Chou, C., “A true phase sensitive optical heterodyne polarimeter on glucose concentration measurement,” Optics Comm., 141, pp.314., 1997.

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O’Flaherty, N., Kiyomoto, N., Shirahama, I. and Mochida, Y., “A system for high sensitivity measurement of birefringence using a photo-elastic modulator, and its applications,” in Electro-Optic and Magneto-Optic Materials II, H. Dammann, ed., Proc. SPIE 1274, pp.122., 1990.

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Wickramasingle, H. K., Laser Heterodyne Probes., Optical Metrology, NATO ASI series, 1987.

William, A. Shurcliff., Polarized Light., Cambridge, 1962.

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莊錦和, “高靈敏度與高穩定度光纖折射計之研發,” 碩士論文, 國立成功大學機械工程學系, 2000.
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