Doped Doped Waveguide Amplifier Gain Bandwidth And Experimental Study

In this dissertation, the theory of integrated waveguide amplifier is introduced. At first, its gain characteristics have been studied by solving numerically propagation equations and rate equations. To meet the requests of communication system, the integrated waveguide amplifier bandwidth should be improved. Therefore a few of feasible bandwidth methods have been brought forward, such as using waveguide grating filter, making new material waveguide and improving the effect of ion-exchange.The progress, principle and the confronting problems of sliver film ion-exchange have been introduced afterwards. Planar waveguides are fabricated in phosphate glass substrate. The mode refractive index of 632.8nm wavelength, which propagates in ion-exchanged planar waveguides, is obtained by M line technology; the serious problems of silver film ion-exchange also be pointed out. The refractive index profile of planar waveguide is obtained with inverse Wentzel-Kramer-Brillouin method by measured mode refractive index. Finally, some improvements of silver film ion-exchange is put forward.