標題: | 腔內被動式Q開關之光學參數振盪器研究 Passively Q-switched intracavity optical parametric oscillator |
作者: | 蔡玲意 LingYi Tsai 陳永富 YuFung Chen 電子物理系所 |
關鍵字: | 光學參數振盪器;光學參數振盪器;可調式雷射;人眼安全;被動式Q開關;腔內;opo;optical parametric oscillator;tunable laser;eye-safe;Passively Q-switched;intracavity |
公開日期: | 2004 |
摘要: | 利用腔內光學參數振盪器來產生1.5□m左右波長的人眼安全雷射,在14W激發光源下,已可得到1.6ns、10kW的輸出;在我們實驗中,使用Nd:GdVO4當作增益介質可以得到奈米以下(0.7ns)的脈衝寬度,以及20kW的脈衝功率輸出。並可利用two-mirror的架構,使腔內光學參數振盪器更穩定,且提高其脈衝能量約150%;並將穩定的特性運用在可調式波長,可得到0.4nm/0C的調整波長斜率,增加使用的便利性。且使用Nd:Gd0.7Y0.3VO4比Nd:YVO4的脈衝功率約3倍高、比Nd:GdVO4的脈衝功率約1.8倍高。 Extremely short (1.6 ns) high-peak-power (> 10 kW) pulses of lasers at the eye-safe wavelength region about 1.5 □m are obtained by intracavity optical parametric oscillators (OPOs). We demonstrated a compact efficient eye-safe OPO pumped by a diode-pumped passively Q-switched Nd:GdVO4 laser to produce peak powers at 1571 nm higher than 20 kW with pulse widths of 0.7ns . On the other hand, we overcome the instablility in the IOPO by using two-mirror structure .At the same time, we raise the pulse energy to 1.5 times. Due to its stability, we try to apply the two-mirror structure to tune wavelengths by temperature. As a result, we can get the curve slope about 0.4nm/0C. By the way, using Nd:Gd0.7Y0.3VO4 crystals may get 3 times the pulse energy by using Nd:YVO4 crystals and 1.8 times the pulse energy by using Nd:GdVO4 crystals. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009221530 http://hdl.handle.net/11536/75946 |
Appears in Collections: | 畢業論文 |