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研究生:張耿豪
研究生(外文):Ken-Haw Chang
論文名稱:漸變式光纖光學之實驗研究
論文名稱(外文):Experimental Fabrication Of Tapered Fiber Device
指導教授:賴映杰
指導教授(外文):Yin-Chien Lai
學位類別:碩士
校院名稱:國立交通大學
系所名稱:光電工程所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:52
中文關鍵詞:光纖元件
外文關鍵詞:fiber device
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發展光纖光學通訊元件
In this thesis, we develop the required fabrication techniques for special tapered fiber devices including single — tapered fibers, super- tapered fiber couplers, and all-fiber optical add-drop multiplexers. Some preliminary experimental results are shown to demonstrate the feasibility of fabricating these devices with commercial fiber coupler fabrication stations.
Outline
Abstract…..……..……………………………………………….……...i
Special thanks.….…………………………………………….….……ii
Outline………………………………………………………………….iii
Diagram catalogue……………………………….……………….......v
Chapter 1 Introduction………………………………………………....1
1.1 Fiber coupler.……..……..…..…………………………..…....1
1.2 Fiber grating………….………..…..…..……………………....2
1.3 Tilted fiber gratings…………...…..………..……………..........3
1.3.1 Transverse mode distribution in fiber……..……..........4
1.4 Novel fiber devices…..…………………………….…..........5
1.5 Thesis structure………………………….……………...........7
Chapter 2 Single-tapered fiber……………...……………..............8
2.1 Analysis of single-tapered fiber……………………….............8
2.2 Criteria of adiabatic tapering.…..….…..…….…………….....9
2.2.1 Length-scale criterion………………….……..............10
2.2.2 Weak power transfer criterion…….………..……......12
2.3 Experimental results on tapered fibers.……….........…...…15
2.3.1 Fiber profile………………...………..….…………….17
2.3.2 Single-tapered fiber interferometer.......……………..19
Chapter 3 Super-tapered fiber coupler.………..........……………...22
3.1 Introduction to fiber couplers….………….…………….…….22
3.2 Analysis of fiber couplers…………..............…………..……22
3.3 Experimental results on super-tapered fiber couplers….…25
Chapter 4 All-fiber optical add-drop multiplexer...…………………28
4.1 Introduction of all-fiber OADM………..........….………...….28
4.2 Analysis of all-fiber OADM……………........……….………29
4.2.1 Analysis of the null coupler……..…...…..……………29
4.2.2 Analysis of tilted fiber gratings…...…..………………31
4.3 Experimental results on all-fiber OADM……....…………..36
4.3.1 Fabrication of the null coupler ……………..………..36
4.3.2 Fabrication of tilted fiber gratings………...…………..42
4.3.3 Fabrication of all-fiber OADM..…………………….....44
Chapter 5 Conclusion………………………………………………..47
Reference……………………….…………………………………….59
Diagram catalogue
Fig 1.1 Fiber coupler………………..………………………….……..1
Fig 1.2 Normal fiber gratings……………………………….….……2
Fig 1.3 Tilted fiber gratings…………………………………………. 3
Fig 1.4 Single-tapered fiber……………………….……………….....6
Fig 1.5 Super-tapered fiber couplers………………………………....6
Fig 1.6 All-fiber optical add-drop modulator…………………..…....7
Fig 2.1 Circular tapered cone………..………..……………………..11
Fig 2.2 The sintering machine……...…..………..…………….........16
Fig 2.3 Scheme of high definition microscope…….…..……........17
Fig 2.4 Profile of single-tapered fiber(1).………………….…........18
Fig 2.5 Profile of single-tapered fiber(2).………………….…........18
Fig 2.6 Profile of single-tapered fiber(3).………………….…........18
Fig 2.5 Profile of single-tapered fiber(2).…………………….........18
Fig 2.7 Profile of single-tapered fiber(4).……………………........18
Fig 2.8 Signal fluctuation diagram…...…………………….…........18
Fig 2.9 Amplified Spontaneously Emission……………….…........19
Fig 2.10 Output signal diagram of single-tapered fiber (1)..........20
Fig 2.11 Output signal diagram of single-tapered fiber (2)...…......20
Fig 2.12 Output signal diagram of single-tapered fiber (3)...…......20
Fig 2.13 Output signal diagram of single-tapered fiber (4)...…......21
Fig 3.1 Output signal diagram of super-tapered fiber coupler(1)...26
Fig 3.2 Output signal diagram of super-tapered fiber coupler(2)...26
Fig 3.3 Output signal diagram of super-tapered fiber coupler(3)...26
Fig 3.4 Scheme of fiber sensingsystem……………………….......27
Fig 4.1 Traditional OADM………………………………………......29
Fig 4.2 Null couplers……...………………………………………......29
Fig 4.3 Scheme of mode conversion in null coupler………………30
Fig 4.4 Tilted gratings……...……………………………………......31
Fig 4.5 Coupler machine...…..…………………………………......37
Fig 4.6 Sintering processing……...……………………………......37
Fig 4.7 Fiber twisted..……...……………………………………......37
Fig 4.8 Coupler machine with monitor…………………………......37
Fig 4.9 Packaging apparatus…………..………………………......38
Fig 4.10 Output signal diagram of null coupler……….………......40
Fig 4.11 signal loss diagram of null coupler…………..………......40
Fig 4.12 Fiber mode in real captured(1)…………….…………......41
Fig 4.13 Fiber mode in real captured(2)…………….…………......41
Fig 4.14 Profile of the null coupler(1)………………….………......41
Fig 4.15 Profile of the null coupler(2)………………….………......41
Fig 4.16 Profile of the null coupler(3)………………….………......42
Fig 4.17 Apparatus of Fiber gratings.………………….………......43
Fig 4.18 Scheme of the null coupler…..……………….………......44
Fig 4.19 Add process scheme of OADM………..….…………......45
Fig 4.20 Drop process scheme of OADM…………..…………......45
Fig 4.21 Drop signal diagram of OADM…………….…………......46
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