Study On Broad-Band Erbium-Doped Super-Fluorescent Fiber Source

Erbium-doped Super-fluorescent Fiber Sources ( ED-SFS ) are excellent broad-band fiber source. It is normally used in Fiber Sensing or Fiber Detecting system. Recently,with its excellent traits,more and more ED-SFSs have been applied to the navigational level Fiber of Gyroscopes(FOG),which has largely accelerated the Research and Development of the ED-SFSs.This thesis chose ED-SFS as the research topic,and introduced the author's theoretical research on the modeling of ED-SFS. Basing on this,we numerical simulated and experimented with C-band,L-band,C+L-band SFS in different configurations.The main content can be concluded as follow:1,In the introduction,we presented the principals of the generation of SFS and the history,also the recent development of ED-SFS.2,Modeling and Numerical method:(1) Introduced the principals and configurations of ED-SFS. Then deduced the equations of the energy level of Erbium ions and listed the differential evolution equation set-up for the reduced modeling of ED-SFS under the 980nm and 1480nm pumping respectively.(2) Treated the reduced modeling of ED-SFS as a boundary value problem of with a number of 2N+1 differential equations. Then detailedly presented the numerical method for this boundary value problem:Shooting method,improved Newton iteration formula.(3) Derived the computation formulas for the original parameters needed in the simulation,and introduced the main function of the three program modules.3,Simulation and experimental research in Single pass configuration:(1) Firstly,we simulated the situation under the classic parameters used by Wysocki,then under the parameters of C600 EDF in our lab. Also we analyzed the working mechanics of the ED-SFS.(2) Experimental researched in the configurations of SPF and SPB with traditional C-band SFS.4,Simulation and experimental research in Dual-pass Forward configuration:(1) Simply introduced the generation principals of the L-band SFS;...