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국내공공정책정보
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논문명/저자명
Optical fiber-based pulsed lasers at 2 μm wavelengths / Minwan Jung 인기도
발행사항
서울 : 서울시립대학교 대학원, 2016.2
청구기호
TD 621.39 -16-484
형태사항
viii, 96 p. ; 26 cm
자료실
전자자료
제어번호
KDMT1201600056
주기사항
학위논문(박사) -- 서울시립대학교 대학원, School of Electrical and Computer Engineering, 2016.2. 지도교수: Ju Han Lee
원문

목차보기더보기

Title Page

Abstract

Contents

Chapter 1. Introduction 13

1. Motivation 13

2. Organization of the dissertation 15

Chapter 2. Fiber lasers 16

1. Rare earth doped fiber 16

2. 2 ㎛ fiber lasers 20

3. Power limitation of fiber lasers 23

4. Q-switching of fiber lasers 26

5. Mode-locking of fiber lasers 30

6. Saturable absorbers 36

Chapter 3. Q-switched thulium-doped fiber laser 39

1. Passively Q-switched fiber laser employing carbon nano tube 39

2. Actively Q-switched laser using a variable optical attenuator 47

Chapter 4. Mode-locked thulium-doped fiber laser 55

1. Graphene oxide deposited D-shaped fiber 55

2. Tungsten disulfide deposited D-shaped fiber 66

3. Gold-deposited D-shaped fiber 74

Chapter 5. Conclusion 81

Reference 84

Author's Publications 96

국문초록 104

Table 1. Parameters of mode locked fiber laser 32

Table 2. The recovery time of various saturable absorbers. 38

Figure 1. Energy level diagram of ytterbium ions 16

Figure 2. Absorption and emission spectrum of ytterbium doped fiber 17

Figure 3. Energy level diagrams of erbium ions 17

Figure 4. Absorption and emission spectrum of erbium doped fiber 18

Figure 5. Atmospheric transmission spectrum 20

Figure 6. Energy level diagram of Thulium ions. 21

Figure 7. Absorption and Emission cross section of TDF 22

Figure 8. Configuration of Double clad fiber 23

Figure 9. CW High power Laser for various wavlengths 24

Figure 10. Power limitation of thulium-doped fiber laser 25

Figure 11. Q-switching operations schematic 27

Figure 12. (a) out of phase state, (b) In phase state of mode. 31

Figure 13. (a) mode-locked fiber laser diagram and (b) pulse duration of output pulses. 33

Figure 14. Calculated (a) optical spectrum with phase and (b) pulse parameter of resonator... 34

Figure 15. Compressed pulse width and peak power of output pulses. 35

Figure 16. Saturable absorber energy diagrams. 36

Figure 17. The reflectivity fitting of saturable absorber. 37

Figure 18. The laser schematic 40

Figure 19. The nonlinear absorption of the CNT-based saturable absorber at 1562 ㎚. 41

Figure 20. (a) The optical spectrum and (b) the oscilloscope trace of the laser output at a... 42

Figure 21. (a) The output power variation as a function of the pump power and (b) the... 45

Figure 22. The temporal characteristic variation of the output pulses measured every ten... 46

Figure 23. Experimental schematic of the Q-switched THDF laser. 47

Figure 24. (a) Optical attenuation of the Si-based VOA as a function of driving voltage,... 48

Figure 25. Measured (a) oscilloscope trace, and (b) optical spectrum of Q-switched pulses at... 49

Figure 26. (a) Measured average output power and pulse peak power versus pump power at... 52

Figure 27. (a) Measured average output power and pulse peak power as a function of... 54

Figure 28. (a) The laser schematic. (b) Measured linear absorption spectrum: Insets: Measured... 56

Figure 29. Measured (a) oscilloscope trace and (b) optical spectrum of the output pulses. 59

Figure 30. (a) Theoretically calculated first-order Kelly sideband position relative to the center... 61

Figure 31. Measured (a) optical spectra and (b) autocorrelation traces of the optical pulses... 63

Figure 32. Measured pulse width and average optical power of the amplified pulses as a... 65

Figure 33. (a) Schematic of the ultrasonication used to prepare the nanostructured WS₂... 67

Figure 34. Measured (a) SEM image and (b) AFM image of the prepared WS₂ solution. 67

Figure 35. Measured (a) absorbance, (b) Raman spectrum of the prepared WS₂ particles. 68

Figure 36. (a) Schematic and (b) photograph of the WS₂-deposited side-polished fiber. 68

Figure 37. (a) Measurement setup and (b) measured nonlinear transmission of the WS₂-based... 70

Figure 38. Tm-Ho co-doped fiber-based mode-locked laser configuration. 71

Figure 39. (a) Optical spectrum and (b) oscilloscope trace of the output pulses. 72

Figure 40. (a) Autocorrelation of the output pulses. (b) Electrical spectrum of the output... 73

Figure 41. Schematic of passively mode-locked laser 74

Figure 42. Measured (a) oscilloscope trace, (b) optical spectrum and (c) electrical spectrum of... 76

Figure 43. Amplified (a) optical and (b) autocorrelator of the output pulses. 78

Figure 44. Measured pulse width and average output power of the amplified pulses as a... 79

Figure 45. Pulse energy and pulse peak power 80

초록보기 더보기

 본 논문에서는 툴륨 첨가 광섬유 기반 Q 스윗칭과 모드 잠금 레이저에 대해 전반적으로 연구하였다. 첫 번째로, 능동 및 수동 Q 스위칭 광섬유 레이저 원리에 대해서 다음으로는 Carbon nano tube를 이용한 광섬유 기반 수동형 Q 스윗칭 툴륨 첨가 광섬유 연구결과를 보였다. 또한 실리콘 기반의 광 감쇄기를 이용한 능동형 Q 스윗칭 광섬유 레이저를 성공적으로 수행하고 이를 검증하였다. 사용된 실리콘 기반 광 감쇄기는 1.5 마이크로에서 2 마이크로 까지 광 대역에서 동작하는 것을 확인 하였으며 낮은 전력 손실을 가지는 우수한 광 소자임을 실험적으로 검증하였다.

모드 잠금 레이저에서는 두가지 종류의 포화 흡수체와 편광기를 이용하여 공진기를 구성하였다. 툴륨 홀륨 첨가 광섬유 링 레이저 공진기에 포화 흡수체를 삽입후 공진기 길이를 조절하여 초단 펄스를 얻어내었다. 툴륨 첨가 광섬유 기반 증폭기를 구성 후 이를 이용하여 오토콜리레이터에 입사하여 이의 펄스 폭을 비교 분석 하였다.

참고문헌 (66건) : 자료제공( 네이버학술정보 )더보기

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 “Narrow linewidth, tunable Tm3+ -doped fluoride fiber laser for optical-based hydrocarbon has sensing,” IEEE J. Select. Topics... 미소장
2 “Coherent laser radar at 2 μm using solid-state lasers,” IEEE Trans. Phot. Tech. Lett. 31, 4-15 (1993). 미소장
3 Atmospheric CO~2 measurements with a 2 μm airborne laser absorption spectrometer employing coherent detection 네이버 미소장
4 Mid-infrared coherent sources and applications (Springer, 2008). 미소장
5 Optical Coherence Tomographic Imaging of Human Tissue at 1.55 μm and 1.81 μm Using Er- and Tm-Doped Fiber Sources. 네이버 미소장
6 Treatment of Melasma Using a Novel 1,927‐nm Fractional Thulium Fiber Laser: A Pilot Study 네이버 미소장
7 Towards high-power mid-infrared emission from a fibre laser 네이버 미소장
8 High-power 83 W holmium-doped silica fiber laser operating with high beam quality 네이버 미소장
9 High-Power Thulium Fiber Laser Ablation of Urinary Tissues at 1.94 m 네이버 미소장
10 Erbium-doped tellurite glass fibre laser and amplifier 네이버 미소장
11 Fluoride glass Raman fiber laser at 2185 nm 네이버 미소장
12 Mode-Locked Tm–Ho-Codoped Fiber Laser at 2.06 $\mu$m 네이버 미소장
13 Erbium-doped all-fiber laser at 2.94 μm 네이버 미소장
14 www.rp-photonics.com 미소장
15 www.invocom.et.put.poznan.p 미소장
16 www.commons.wikimedia.org 미소장
17 www.throlabs.com 미소장
18 Efficiency of pump absorption in double-clad fiber amplifiers II Broken circular symmetry 네이버 미소장
19 “Power scaling analysis of fiber lasers and amplifiers based on nonsilica materials,” Proc. SPIE 7686, 768611 (2010). 미소장
20 High power fiber lasers: current status and future perspectives [Invited] 네이버 미소장
21 Enhanced Q switching in double-clad fiber lasers 네이버 미소장
22 Mode-locked 1.93 microm thulium fiber laser with a carbon nanotube absorber. 네이버 미소장
23 High average power picosecond pulse generation from a thulium-doped all-fiber MOPA system. 네이버 미소장
24 Enhanced Q switching in double-clad fiber lasers 네이버 미소장
25 High-energy, high-brightness Q-switched Tm 3+-doped fiber laser using an electro-optic modulator 네이버 미소장
26 “Mode-Locking of Lasers,” IEEE J. Selected Topic in Quantum Electron., 6(6), 1173-1185(2000). 미소장
27 Semiconductor saturable absorber mirrors (SESAM's) for femtosecond to nanosecond pulse generation in solid-state lasers 네이버 미소장
28 All-fiber Er-doped dissipative soliton laser based on evanescent field interaction with carbon nanotube saturable absorber. 네이버 미소장
29 Atomic-Layer Graphene as a Saturable Absorber for Ultrafast Pulsed Lasers 네이버 미소장
30 Graphene mode-locked femtosecond laser at 2 μm wavelength 네이버 미소장
31 Graphene oxide absorber for 2 m passive mode-locking Tm:YAlO3 laser 네이버 미소장
32 Mode-locked 2 μm thulium-doped fiber laser with graphene oxide saturable absorber 네이버 미소장
33 Tm-doped fiber laser mode-locked by graphene-polymer composite. 네이버 미소장
34 A Mode-Locked 1.91μm Fiber Laser Based on Interaction between Graphene Oxide and Evanescent Field 네이버 미소장
35 All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers 네이버 미소장
36 Thulium-doped all-fiber laser mode-locked by CVD-graphene/PMMA saturable absorber. 네이버 미소장
37 2 μm solid-state laser mode-locked by single-layer graphene 네이버 미소장
38 1.06 μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi₂Se₃ as a saturable absorber. 네이버 미소장
39 All-fiberized, passively Q-switched 1.06 μ m laser using a bulk-structured Bi 2 Te 3 topological insulator 네이버 미소장
40 All-normal-dispersion dissipative-soliton fiber laser at 1.06  µ m using a bulk-structured Bi 2 Te 3 topological insulator-deposited side-polished fiber 네이버 미소장
41 Ultra-short pulse generation by a topological insulator based saturable absorber 네이버 미소장
42 Self-Assembled Topological Insulator: Bi$_{2}$Se$_{3}$ Membrane as a Passive Q-Switcher in an Erbium-Doped Fiber Laser 네이버 미소장
43 Mode-locking in Er-doped fiber laser based on mechanically exfoliated Sb_2Te_3 saturable absorber 네이버 미소장
44 A femtosecond pulse erbium fiber laser incorporating a saturable absorber based on bulk-structured Bi2Te3 topological insulator. 네이버 미소장
45 “Topological-insulator passively Q-switched double-clad fiber laser at 2 μm wavelength,” IEEE J. Sel. Top. Quantum Electron.... 미소장
46 “Passively Q-switched 1.89-μm fiber laser using a bulk-structured Bi2Te3 topological insulator,” IEEE J. Sel. Top. Quantum... 미소장
47 A femtosecond pulse fiber laser at 1935 nm using a bulk-structured Bi2Te3 topological insulator. 네이버 미소장
48 Carbon nanotube mode lockers with enhanced nonlinearity via evanescent field interaction in D-shaped fibers. 네이버 미소장
49 A Passively Mode-Locked Diode-End-Pumped Nd:YAG Laser with a Semiconductor Saturable Absorber Mirror Grown by Metal Organic Chemical Vapour Deposition 네이버 미소장
50 Monolayer graphene as a saturable absorber in a mode-locked laser 네이버 미소장
51 Ultrashort pulse-generation by saturable absorber mirrors based on polymer-embedded carbon nanotubes. 네이버 미소장
52 Ultrafast dynamics of photoexcited coherent phonon in Bi[sub 2]Te[sub 3] thin films 네이버 미소장
53 Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber 네이버 미소장
54 Active Q-switching in an erbium-doped fiber laser using an ultrafast silicon-based variable optical attenuator. 네이버 미소장
55 Silicon Photonics: A Low Cost Integration Platform for Datacom and Telecom Applications 네이버 미소장
56 Characteristic sideband instability of periodically amplified average soliton 네이버 미소장
57 Time-bandwidth product of chirped sech^2 pulses: application to phase-amplitude-coupling factor measurement 네이버 미소장
58 Sideband generation through perturbations to the average soliton model 네이버 미소장
59 Effect of frequency chirp on soliton spectral sidebands in fiber lasers 네이버 미소장
60 Nonlinear Fiber Optics, 3rd Ed., (Academic Press, 2007). 60. D. Mao, Y. Wang, C. Ma, L. Han, B. Jiang, X. Gan, S. Hua, W.... 미소장
61 “WS2 mode-locked ultrafast fiber laser,” Sci. Rep. 5, 7965 (2015). 미소장
62 Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials 네이버 미소장
63 “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608... 미소장
64 “Identification of individual and fey layers of WS2 using Raman spectroscopy,” Sci. Rep. 3, 01755 (2013). 미소장
65 Mode-locked pulse generation from an all-fiberized, Tm-Ho-codoped fiber laser incorporating a graphene oxide-deposited side-polished fiber. 네이버 미소장
66 Characteristic sideband instability of periodically amplified average soliton 네이버 미소장

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