本論文中我們用以Cr4+:YAG 作為飽和吸收體的被動式Q 開關Nd:LuVO4 雷射去呈現實驗結果。在泵浦功率為5.47W 時，其平均的輸出功率等於0.63W 而穩定的脈衝列有著45KHz 的重複頻率，脈衝的半高寬為31ns 且峰值功率等於455W。當泵浦功率超過5.47W 後，時空不穩狀就會出現。不穩情形伴隨著脈衝分離還有衛星脈衝的產生。而實驗結果也展現了衛星脈衝產生的機制取決於多橫模互相的競爭。

In this work we used a passively Q-switching Nd:LuVO4 laser to present experimental results with a Cr4+:YAG saturable absorber. At a pump power of 5.47 W, the average output power was 0.63 W and the stable pulse train had a repetition rate of 45 KHz, a pulse width of 31 ns and a peak power of 455 W. When the pump power exceeded 5.47 W, spatial-temporal instability occurred. The instability accompanied the generation of pulse separation and a satellite pulse. The experimental results reveal that the mechanism of generation of the satellite pulse is governed by the multitransverse mode competition.

第一章 序 論................................1
1.1固態雷射的簡介...........................1
1.2 Q開關雷射的簡介.........................2
1.3動機與目標...............................3
第二章 基本原理.............................4
2.1 Nd:LuVO4晶體的特性......................4
2.2 Q-開關基本原理..........................9
2.3飽和吸收體..............................11
第三章 被動式Q-開關的Nd:LuVO4雷射特性......17
3.1被動式Q-開關雷射的架構..................17
3.2被動式Q-開關雷射特性....................22
3.3低功率穩定行為..........................26
3.4高功率週期到混沌的不穩定行為............29
3.5結論....................................33
第四章 未來工作............................35
參考資料...................................36

[1] 丁勝懋“雷射工程導論,”中央圖書出版社出版,1995
[2] 呂助增“雷射原理與應用,”滄海書局出版,2000
[3] C.Maunier, J.L.Doualan, R.Moncorge,“ Growth,
spectroscopic characterization, and laser performance of Nd:LuVO4, a new infrared laser material that is suitable
for diode pumping,” J. Opt. Soc.19,8﹙2002﹚
[4] Chunyu Zhang, Ling Zhang, Zhiyi Wei, Chi Zhang, Yongbing Long, and Zhiguo Zhang,“Diode-pumped continuous-wave Nd:LuVO4 laser operating at 916 nm,”Opt. Lett.31,10（2006）
[5] Huaijin Zhang, Junhai Liu, Jiyang Wang, Xiangang Xu, and Minhua Jiang,“Continuous-wave laser performance of
Nd:LuVO4 rystal operating at 1.34 μm,”APPLIED OPTICS,44,
34（2005）
[6] Junhai Liu, Huaijin Zhang, Zhengping Wang, Jiyang Wang,
Zongshu Shao, and Minhua Jiang,“Continuous-wave and
pulsed laser performance of Nd:LuVO4 crystal” OPTICS
LETTERS,29,2（2004）
[7] A.Siegman “Lasers,” University Science Books,1986,ch26
[8] Y.S. choi, “Saturation characteristics of Cr4+:YAG crystal and dye films for passive Q switches,” APPLIED OPTICS,Vol.40, NO.30, 2001
[9] C. Li, J. Song, D. Shen, N.S. Kim, J. Lu, K.Ueda “Diode-pumped passively Q-switched Nd:GdVO4 lasers operating at 1.06μm wavelength” Appl. Phys.B 70,471–474 (2000)
[10] M. D. Wei, C.-H. Chen, and K.-C. Tu,“Spatial and temporal instabilities in a passively Q-switched Nd:YAG laser with a Cr4+:YAG saturable absorber” Opt.Express,12, 3972(2005)
[11] J. Bartschke, K.-J. Boller, and R. Wallenstein,“Diodepumped passively Q-switched selffrequency-doubling
Nd:YAB laser”J. Opt. Soc. Am.14,2（1997）
[12] S. P. Ng, D. Y. Tang, L. J. Qian, and L. J. Qin,“Satellite Pulse Generation in Diode-Pumped Passively Q-Switched Nd:GdVO4 Lasers”IEEE J. QUANTUM ELECTRONICS,42,7,（2006）
[13] Jun Dong* and Ken-ichi Ueda,“Observation of repetitively nanosecond pulse-width transverse patterns in microchip self-Q-switched laser”PHYSICAL REVIEW A ,73,053824（2006）