研究生: |
呂彥儒 Yen-Ju Lu |
---|---|
論文名稱: |
高功率全光纖1064 nm 摻鐿雷射光源:設計與應用 High-Power All-Fiber 1064nm Ytterbium-Doped Laser Source : Design and Application |
指導教授: |
廖顯奎
Shien-Kuei Liaw 宋峻宇 Jiun-Yu Sung |
口試委員: |
楊富量
Fu-Liang Yang 徐世祥 Shih-Hsiang Hsu 游易霖 Yi-Lin Yu 廖顯奎 Shien-Kuei Liaw 宋峻宇 Jiun-Yu Sung |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 光電工程研究所 Graduate Institute of Electro-Optical Engineering |
論文出版年: | 2022 |
畢業學年度: | 110 |
語文別: | 中文 |
論文頁數: | 102 |
中文關鍵詞: | 環形脈衝雷射 、1064 nm 摻鐿光纖雷射 、半導體雷射 、偏振疊加波鎖模 、拉曼雷射 、主振盪放大器 |
外文關鍵詞: | Fiber ring pilse laser, 1064 nm Ytterbium-doped fiber laser, Semiconductor laser, Polazization additive-pulse mode locking, Raman laser, MOPA |
相關次數: | 點閱:556 下載:0 |
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隨著時代進步,雷射的應用越來越廣泛,從工業用的高功率雷射到醫療用的脈衝雷射、以及檢測物質的拉曼雷射,生活中人們的需求也越來越多,有些人想尋求醫療美容的幫助滿足自身需求,有些人想要透過生物檢測來了解自身是否健康,回歸到雷射,生物樣品大多數由水組成,且在1064 nm左右的雷射波長下,紅外光波段不會受到組織中的水、含氧血中蛋白、脫氧血紅蛋白及黑色素吸收,可以盡可能降低生物樣品被雷射損害,因此1064 nm雷射在近幾年是熱門的波段選項。實驗最終測得長度為16 cm的摻鐿光纖可以使輸出功率達到0.9 mW、中心波長為1046 nm 、3 dB損耗為0.16 nm、雷射OSNR為39.6 dB,再以此為基礎建構鎖模脈衝雷射,原先只有7.3公尺的共振腔,脈衝重複率為18.5 MHz、脈衝寬度為13.8 ns,接著使雷射共振腔增長為1069 m,得到脈衝重複率為181.81 kHz、脈衝寬度為640.8 ns,與研製主振盪高功率摻億光纖放大器結合後,得到最大平均功率2033 mW、中心波長為1052.6 nm、脈衝重複率為181.81 kHz、脈衝寬度為1009.3 ns、OSNR為34 dB、脈衝能量與尖峰功率分別為11.23 μJ與11.12 W,接著將此輸出雷射進行老鼠實驗與對比一般市售醫療雷射的差別。
使用環形雷射架構研製適用於拉曼感測的1064 nm雷射光源,結合高功率光纖放大器,加上布拉格光纖光柵使波長變為1063.88 nm 、輸出功率為3.35 mW、3 dB損耗為0.12 nm,結合MOPA架構,將半導體光放大器電流固定為300 mA 、功率放大器的兩顆泵激雷射電流在5A時能使整個架構輸出功率達至1269 mW,並且比較台灣大學凝態中心的顯微拉曼光源,我們將高功率放大器電流調整至1.6 A使輸出功率與凝態中心一樣為55 mW、3 dB損耗為0.24 nm、OSNR為40.8 dB,並結合拉曼光譜儀對SI 111切片量測,也將市售拉曼光譜儀的光源與自製光源進行對比。
With the advancement of the times, the applications of lasers have become more and more extensive, from high-power lasers for industrial use to pulsed lasers for medical use, as well as Raman lasers for detecting substances. For example, some people seek for medical cosmetic help to meet their own needs, and some people take biological detection to monitor their healthy condition. In the experiment, most biological samples are composed of water. With a laser wavelength at 1064 nm, infrared optical band was not absorbed by water, oxygenated blood proteins, deoxygenated hemoglobin and melanin in tissues, which minimizes the damage of biological samples by lasers. Therefore, the 1064 nm laser is a popular band in recent years. In the experiment, we measured that the ytterbium-doped fiber with a length of 16 cm achieved an output power of 0.9 mW, a center wavelength of 1046 nm, a 3 dB loss of 0.16 nm, and a laser OSNR of 39.6 dB. Based on the result, a mode-locked pulse laser was constructed. The original resonant cavity was only 7.3 meters, the pulse repetition rate was 18.5 MHz, while the pulse width was 13.8 ns. Moreover, the laser resonant cavity was increased to 1069 m, and the pulse repetition rate was 181.81 kHz, while the pulse width was 640.8 ns. When the combination of the main oscillation high-power 100 million-doped fiber amplifier is developed, the maximum average power is 2033 mW, the center wavelength is 1052.6 nm, the pulse repetition rate is 181.81 kHz, the pulse width is 1009.3 ns, the OSNR is 34 dB, and the pulse energy and peak power are 11.23 μJ and 11.12 W, respectively. What’s more, the mouse experiment was performed on this output laser, and the difference between the general commercial medical lasers was compared.
A 1064 nm laser light source suitable for Raman sensing was developed by using a ring laser architecture. Combined with a high-power fiber amplifier, a fiber Bragg grating was added to make the wavelength change to 1063.88 nm, while the output power was 3.35 mW, and the 3 dB loss was 0.12 nm. On the other hand, combined with the MOPA architecture, the semiconductor optical amplifier current was fixed at 300 mA, and the two pumping laser currents of the power amplifier made the output power of the entire architecture reach 1269 mW at 5A. As for the light source, we adjusted the high power amplifier current to 1.6 A to make the output power of 55 mW the same as the condensed state center, while the 3 dB loss was 0.24 nm, and the OSNR was 40.8 dB. Finally, the light source of the commercially available Raman spectrometer was compared with the self-made light source.
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