Dynamic pulse evolution in cw passively mode-locked Ti:sapphire sers

• Main Authors: Nen-Wen Pu, 蒲念文
• Other Authors: Ci-Ling Pan
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/51446564012070561817

碩士 === 國立交通大學 === 光電(科學)研究所 === 82 === The evolution from cw to partial mode-locking, to complete mode-locking in passively mode-locked Ti:sapphire/DDI and IR140 lasers has been determined by measuring the contrast ratios of transient autocorrelation traces at consecutive delay times using the time-gating technique. The corresponding transient RF spectra showing the growth of beat notes also agree with the above observation. The build-up of mode- lockedlses from cw noises can be simulated by a two- level- saturable-absorber model. The experimental results are in good agreement with the predictions of numerical simulation.