Studies On Tunable Er～(3+) Doped Fiber Laser And Super-fluorescent Fiber Source

In this dissertation, theoretical and experiment studies of tunable Er3+ doped fiberlaser are presented. In the end ,the study about Super-fluorescent Source(SFS) isalso presented. Several works is carried out as follows: 1 In the first chapter, the working principles of different fiber lasers and thedeveloping condition of tunable lasers are introduced. 2 In the second chapter, the operating principles of tunable semiconductor lasersand the tunable principles of tunable filters are introduced. Moreover, the chapter isalso emphasized on the principle special parameters of F-P filter.The characteristicsand basic structures ofcascade F-P filters are also presented. 3 In the third chapter, firstly, we introduce the design principle of Er3+ dopedfiber laser. Secondly, the theory of Er3+ doped fiber laser working at L-band isanalyzed. In the following, we designed different fiber lasers which are working atC-band by different filters.The best outcome obtained by cuniform membrane filter.The tunable range is 1528nm-1563nm, which almost cover entire C-band. Outputpower is 1mW and bandwidth is 0.094nm. 4 In addition, we designed different kinds of tunable L-band fiber lasers whichare tuned by PMF-FLM. Among them, the ideal outcomes obtained by doublepumped structure and the structure with a FBG. The tunable range is 1565nm-1615nm,which is almost cover entire L-band. The output power is more than 1mW and thebandwidth is about 0.6nm. 5 At the last chapter, we analyzed the principle and the structures of SFS. In thefollowing, we designed L-band SFS and broad band SFS.The 3dB bandwidth ofL-band SFS is 1565nm-1610nm.And that of broadband is 1550- 1607nm.The totalefficiency of it is 12.3%.