標題: | 飛秒級被動鎖模鈦藍寶石雷射脈衝演變動力學之研究 Dynamic Pulse Evolution in a Femtosecond Passively Mode-Locked i:Sapphire/DDI Laser |
作者: | 涂懷銘 Hwai-Ming Twu 潘犀靈 Ci-Ling Pan 光電工程學系 |
關鍵字: | 飛秒;鈦藍寶石雷射;鎖模;脈衝;femtosecond;Ti:Sapphire/DDI laser;mode-locking;pulse |
公開日期: | 1994 |
摘要: | 實驗上, 利用時間閘技術量測飛秒級被動鎖模鈦藍寶石雷射起動後在 同 瞬間的暫態自相關軌跡的對比率, 二倍頻轉換效率和百分能量來定量估計 鎖模程度. 我們觀察到雷射輸出由連續波到部分鎖模, 到完全鎖模的整個 演變過程. 此外, 染料濃度的高低並不會影響參與鎖模的起始振盪模數, 但改變腔內色散會影響參與鎖模的起始振盪模數, 實驗結果顯示: 共振腔 色散補償完全時, 參與鎖模的起始振盪模數最多. The evolution from cw to partial mode-locking, to completeode- locking in a femtosecond passively mode-locked:sapphire/DDI laser has been determined by measuring thetrast ratio of transient autocorrelation trace, the SHGersion efficiency, and the fractional energy at consecutivetime using the time-gating technique. Furthermore, it ismed that the concentration of the DDI absorber doesn'tce the number of the initially oscillating modes whichtes in mode-locking, but changing the dispersion of theld. Experimental results also show that for optimumcompensation, the number of the initially oscillatingparticipates in mode-locking may be maximum. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT830123010 http://hdl.handle.net/11536/58862 |
顯示於類別: | 畢業論文 |