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Experimental Study Of Yb3+ Doped Double-clad Mode-locked Fiber Laser

Posted on:2008-10-22Degree:MasterType:Thesis
Country:ChinaCandidate:C H LiuFull Text:PDF
GTID:2178360245492772Subject:Physical Electronics
Abstract/Summary:PDF Full Text Request
In this thesis , theoretical and experimental study of Yb3+ doped double-clad mode-locked fiber laser was presented . The main contents are as follows:First , the development and merits of Yb3+ doped double-clad fiber laser was introduced . A brief introduction on the application of fiber laser was presented.Then , the characteristics of Yb3+ doped double-clad fiber was introduced . It included the following parts: the energy structure and spectrum of Yb3+ ions , the structure of double-cald fiber , the pumping design of fiber laser and the nonlinear effect in fiber. At last , the basic mode-locked theory was presented.Next , a F-P cavity fiber laser was constructed . And the output laser was studied , which implied the characteristics of the fiber. A Q-switched fiber laser was performed .The reason of Q-switched operation was analysed.At last , the study of passive mode-locked Yb3+ doped double-clad fiber laser was performed . The mode-locked operation was related to semiconductor saturable absorber (SESAM) and nonglinear polarization evolution (NPE) . The phenomena and results of the experiment were reported. Q-Switching mode-locked operation was realized , but cw operation failed.All in all , on the base of the theory about Yb3+ doped double-clad fiber laser, the experimental study was performed. The best result was Q-Switching mode-locked operation .In order to realize cw operation , more research is needed.
Keywords/Search Tags:Fiber laser, Q-switched, Mode-locked, SESAM, Double-clad, Yb3+
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