Cu2+-doped germano-silicate glass fiber with high resonant nonlinearity

Abstract

We firstly report on the fabrication of Cu2+-doped germano-silicate glass fiber for nonlinear optical devices application by using modified chemical vapor deposition and solution doping processes. Broadband absorption near 700nm due to the 3d-shell electron transitions of Cu2+ ions from the ground state to the excited states was observed. The resonant nonlinearity of the Cu2+-doped fiber was estimated to be 5.5 x 10(-17)m(2)/W by measuring the phase shift of the fringes obtained from the long-period fiber grating pair upon pumping with a laser diode at 980nm and non-resonant nonlinearities were also measured to be 4.114 x 10(-21)m(2)/W by the continuous wave self-phase modulation method. (c) 2007 Optical Society of America.