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論文名稱 Title |
色散波在超連續光譜中的角色:以五氧化二鉭波導為例 The Role of Dispersive Wave in Supercontinuum Generation : Using Tantalum Pentoxide Waveguide |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
82 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2018-07-28 |
繳交日期 Date of Submission |
2018-08-29 |
關鍵字 Keywords |
非線性色散、色散波、五氧化二鉭、波導、超連續光譜 Dispersive wave generation, Supercontinuum generation, Waveguide, Nonlinear dispersion, Tantalum pentoxide(Ta2O5) |
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統計 Statistics |
本論文已被瀏覽 5643 次,被下載 1 次 The thesis/dissertation has been browsed 5643 times, has been downloaded 1 times. |
中文摘要 |
超連續光譜的寬頻光源在分波多工以及光學相干斷層掃描等,有很大的應用,而色散波的位置決定了超連續光譜的頻寬範圍,因此色散波在超連續光譜中佔有舉足輕重的角色。本論文基於五氧化二鉭的高非線性折射率,CMOS相容性,以及其不受雙光子吸收和自由載子吸收等特性,以五氧化二鉭波導產生超連續光譜進而探討色散波的角色。第一部分:使用色散值在異常色散區的裸波導所產生色散波與超過1.37octave的超連續光譜,在TE模態以及TM模態中,均隨著尖峰功率上升,色散波出現的位置也隨之藍位移,進而拓寬超連續譜的頻寬。在TE模態中,當尖峰功率從198W提升到396W時,色散波的中心波長從611nm藍位移到602nm,這個藍位移的趨勢是因為五氧化二鉭擁有高的非線性折射率,使非線性色散項的角色更加重要,致使色散波位置出現藍位移的情形。我們也利用相位匹配分析去半定量估算出色散波出現的位置;第二部分:歸因於非線性色散的補償,我們也成功使用色散值在正常色散區且線寬為2100X700nm的通道式波導元件產生拓寬程度1.22octave的超連續光譜,並且在560nm處產生綠光色散波,同樣的,隨著能量改變,超連續光譜的頻譜有明顯變寬的趨勢,且色散波出現的位置也有些微藍位移。最後我們也討論了一系列在正常色散區的元件,隨著元件線寬的減小,色散波出現的中心波長有藍位移的趨勢,從紅光色散波逐漸變成綠光色散波。 |
Abstract |
In last few years, super continuum generation (SCG) of which the spanning spectrum is believed to depend on the location of dispersive wave (DW) has been attracted plenty of attention due to it wide application, such as optical coherence tomography (OCT)and wavelength division multiplexing (WDM). In this thesis, using the nature of high optical nonlinearity of Ta2O5, the role of dispersive wave was investigated. In the first part, clear power dependent wavelength of DW and SCG of 1.37 octave was observed and studied for not only TE also TM mode of anomalous dispersion Ta2O5 waveguide. For example, the central wavelength of the generated DW from TE excitation was blue-shifted from 611nm to 602nm with excitation peak power increasing from 198W to 396W. This blue-shift behavior of DW wavelength as increasing excitation power during SCG is attribute to the contribution of inevitable nonlinear dispersion resulting from higher nonlinear coefficient of Ta2O5.The phase matching analysis can be applied and location of DW can be accordingly and semi-quantitatively predicted. In the second part, the possibility of SCG from normal dispersion Ta2O5 waveguide was investigated by using nonlinear dispersion for providing phase matching condition. For waveguide with dimension of 2100X700, clear SCG of 1.22 octave spanning and green(560nm) dispersive wave were observed. This is first time to our best knowledge that SCG can be obtained from waveguide with normal dispersion. Additionally, power dependent and dimension dependent SCG were discussed for confirming the role of DW. |
目次 Table of Contents |
中文審定書 i 英文審定書 ii 致謝 iii 摘要 iv Abstract v 目錄 vi 圖次 viii 表次 xi 第一章 緒論 1 1.1 超連續光譜的應用與未來發展 1 1.2 超連續光譜的組成與介紹 3 1.3 研究動機 7 1.4 論文架構 8 第二章 五氧化二鉭材料介紹與回顧 9 2.1 五氧化二鉭材料介紹 9 2.2 五氧化二鉭之非線性應用 12 2.3 色散波介紹與回顧 14 第三章 非線性色散補償對色散波的影響及耦合效率估算 18 3.1 元件結構設計 19 3.2 元件製備 20 3.2.1薄膜沉積 21 3.2.2熱退火 23 3.2.3薄膜光學特性檢測 24 3.2.4曝光與顯影 26 3.2.5乾式蝕刻 28 3.2.6電漿輔助化學氣相沉積 29 3.2.7切割 30 3.2.7研磨 31 3.3 色散波量測與分析 32 3.3.1 量測系統與架設 32 3.3.2 耦合效率估算 34 3.3.3 量測結果 36 3.4 相位匹配公式估算耦合效率 43 3.5 結論 44 第四章 正常色散區之色散波實現 45 4.1 以非線性色散補償致使正常色散區達成色散波與超連續光譜之評估 46 4.2 正常色散區之色散波與超連續光譜分析 47 4.3 正常色散區中不同線寬元件之色散波量測結果與分析 54 4.4 結論 63 第五章 結論與未來工作 64 參考文獻 65 |
參考文獻 References |
[1] M.R.E. Lamont, B. Luther-Davies, D.-Y. Choi, S. Madden, and B.J. Eggleton, “Supercontinuum generation in dispersion engineered highly nonlinear (γ = 10 /W/m) As2S3 chalcogenide planar waveguide,” Optics Express, vol. 16, no. 19, pp. 14938-14944, 2008. [2] F. Leo, S.-P. Gorza, J. Safioui, P. Kockaert, S. Coen, U. Dave, B. Kuyken, and G. Roelkens, “Dispersive wave emission and supercontinuum generation in a silicon wire waveguide pumped around the 1550 nm telecommunication wavelength,” Optics Letters, vol. 39, no. 16, pp. 3623-3626, 2014. [3] Supercontinuum generation. Available: https://www.nktphotonics.com/lasers-fibers/technology/supercontinuum/ [4] Wave division multiplexing. Available: https://www.multicominc.com/utilizing-wdm-increase-fiber-capacity-without- construction/ [5] Optical coherence tomography. Available: https://en.wikipedia.org/wiki/Optical_coherence_tomography [6] A. Tortora, C. Corsi, and M. Bellinia, “Comb-like supercontinuum generation in bulk media,” Applied physics letters, vol. 85, no. 7, pp. 1113-1115 2004. [7] G. Genty, S. Coen, and J.M. Dudley, “Fiber supercontinuum sources (Invited),” Optical Society of America, vol. 24, no. 8, pp. 1771-1785 2007. [8] Self-phase modulation. Available: http://baike.labbang.com/index.php/%E8%87%AA%E7%9B%B8%E4%BD% 8D%E8%B0%83%E5%88%B6 [9] Y.-Y. Lin, C.-L. Wu, W.-C. Chi, Y.-J. Chiu, Y.-J. Hung, A.-K. Chu, and C.-K. L. “Self-phase modulation in highly confined submicron Ta2O5 channel waveguides,” Optics Express, vol. 24, no. 19, pp. 21633-21641, 2016. [10] Zhang, L., Yan, Y., Yue, Y., Lin, Q., Painter, O., Beausoleil, R. G., & Willner, A. E. (2011). On-chip two-octave supercontinuum generation by enhancing self-steepening of optical pulses. Optics express, 19(12), 11584-11590. [11] Thuy, D. T., Vinh, N. T., Thuan, B. D., & Van, C. L. (2016). Influence of Self-steepening and Higher Dispersion Effects on the Propagation Characteristics of Solitons in Optical Fibers. Computational Methods in Science and technology, 22(4), 239-243. [12] Kalashnikov, V. L., Sorokin, E., & Sorokina, I. T. (2007). Raman effects in the infrared supercontinuum generation in soft-glass PCFs. Applied Physics B, 87(1), 37-44. [13] Coen, S., Chau, A. H. L., Leonhardt, R., Harvey, J. D., Knight, J. C., Wadsworth, W. J., & Russell, P. S. J. (2002). Supercontinuum generation by stimulated Raman scattering and parametric four-wave mixing in photonic crystal fibers. JOSA B, 19(4), 753-764. [14] Yin, Lianghong, Qiang Lin, and Govind P. Agrawal. "Soliton fission and supercontinuum generation in silicon waveguides." Optics letters 32.4 (2007): 391-393. [15] Hickstein, D. D., Kerber, G. C., Carlson, D. R., Chang, L., Westly, D., Srinivasan, K., ... & Papp, S. B. (2018). Quasi-Phase-Matched Supercontinuum Generation in Photonic Waveguides. Physical review letters, 120(5), 053903. [16] Zhao, H., Kuyken, B., Clemmen, S., Leo, F., Subramanian, A., Dhakal, A., ... & Baets, R. (2015). Visible-to-near-infrared octave spanning supercontinuum generation in a silicon nitride waveguide. Optics letters, 40(10), 2177-2180. [17] C.-L. Wu, Y.-J. Chiu, C.-L. Chen, Y.-Y. Lin, A.-K. Chu, and C.-K. Lee, “Four-wave-mixing in the loss low submicrometer Ta2O5 channel waveguide,” Opt. Lett. 40(19), 4528–4531 (2015). [18] Krückel, C. J., Fülöp, A., Klintberg, T., Bengtsson, J., & Andrekson, P. A. (2015). Linear and nonlinear characterization of low-stress high-confinement silicon-rich nitride waveguides. Optics express, 23(20), 25827-25837. [19] Kim, K. S., Stolen, R. H., Reed, W. A., & Quoi, K. W. (1994). Measurement of the nonlinear index of silica-core and dispersion-shifted fibers. Optics letters, 19(4), 257-259. [20] Lacava, C., Stankovic, S., Khokhar, A. Z., Bucio, T. D., Gardes, F. Y., Reed, G. T., ... & Petropoulos, P. (2017). Si-rich silicon nitride for nonlinear signal processing applications. Scientific reports, 7(1), 22. [21] Lamont, M. R., Luther-Davies, B., Choi, D. Y., Madden, S., & Eggleton, B. J. (2008). Supercontinuum generation in dispersion engineered highly nonlinear (γ= 10/W/m) As2S3 chalcogenide planar waveguide. Optics Express, 16(19), 14938-14944. [22] Halir, R., Okawachi, Y., Levy, J. S., Foster, M. A., Lipson, M., & Gaeta, A. L. (2012). Ultrabroadband supercontinuum generation in a CMOS-compatible platform. Optics letters, 37(10), 1685-1687. [23] Li, H., Zhou, F., Zhang, X., & Ji, W. (1997). Picosecond Z-scan study of bound electronic Kerr effect in LiNbO3 crystal associated with two-photon absorption. Applied Physics B, 64(6), 659-662. [24] Edwards, D. F., & Ochoa, E. (1980). Infrared refractive index of silicon. Applied optics, 19(24), 4130-4131. [25] Giordmaine, J. A. (1962). Mixing of light beams in crystals. Physical Review Letters, 8(1), 19. [26] Jones, M. H., & Jones, S. H. (2002). The General Properties of Si, Ge, SiGe, SiO2 and Si3N4. Va. Semicond. [27] Krückel, C. J., Fülöp, A., Klintberg, T., Bengtsson, J., & Andrekson, P. A. (2015). Linear and nonlinear characterization of low-stress high-confinement silicon-rich nitride waveguides. Optics express, 23(20), 25827-25837. [28] Sharma, P., & Katyal, S. C. (2008). Effect of Ge Addition on the Optical Band Gap and Refractive Index of Thermally Evaporated As2Se3 Thin Films. Advances in Materials Science and Engineering, 2008. [29] Yeom, D. I., Mägi, E. C., Lamont, M. R., Roelens, M. A., Fu, L., & Eggleton, B. J. (2008). Low-threshold supercontinuum generation in highly nonlinear chalcogenide nanowires. Optics letters, 33(7), 660-662. [30] G. Oehrlein, "Oxidation temperature dependence of the dc electrical conduction characteristics and dielectric strength of thin Ta2O5 films on silicon," Journal of applied physics, vol. 59, no. 5, pp. 1587-1595, 1986. [31] J.-C. Zhou, D.-T. Luo, Y.-Z. Li, and L. Zheng, "Effect of sputtering pressure and rapid thermal annealing on optical properties of Ta2O5 thin films," Transactions of Nonferrous Metals Society of China, vol. 19, no. 2, pp. 359-363, 2009. [32] J. Komma, C. Schwarz, G. Hofmann, D. Heinert, and R. Nawrodt, "Thermo-optic coefficient of silicon at 1550 nm and cryogenic temperatures," Applied Physics Letters, vol. 101, no. 4, p. 041905, 2012. [33] A. Arbabi and L. L. Goddard, "Measurements of the refractive indices and thermo-optic coefficients of Si3N4 and SiOx using microring resonances," Optics letters, vol. 38, no. 19, pp. 3878-3881, 2013. [34] Wu, C. L., Huang, J. Y., Ou, D. H., Liao, T. W., Chiu, Y. J., Shih, M. H., ... & Lee, C. K. (2017). Efficient wavelength conversion with low operation power in a Ta2O5-based micro-ring resonator. Optics letters, 42(23), 4804-4807. [35] Modotto, D., Andreana, M., Krupa, K., Manili, G., Minoni, U., Tonello, A., ... & Leproux, P. (2015). Efficiency of dispersive wave generation in dual concentric core microstructured fiber. JOSA B, 32(8), 1676-1685. [36] Dave, U. D., Ciret, C., Gorza, S. P., Combrie, S., De Rossi, A., Raineri, F., ... & Kuyken, B. (2015). Dispersive-wave-based octave-spanning supercontinuum generation in InGaP membrane waveguides on a silicon substrate. Optics letters, 40(15), 3584-3587. [37] C. Joseph, P. Bourson, and M. Fontana, "Amorphous to crystalline transformation in Ta2O5 studied by Raman spectroscopy," Journal of Raman Spectroscopy, vol. 43, no. 8, pp. 1146-1150, 2012. [38] Single mode fiber. Available: https://www.rp-photonics.com/single_mode_fibers.html |
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