Hernando Garcia 1, 2, Anthony M. Johnson 1 and Sudhir Trivedi 3
1Dept. of Physics, New Jersey Institute of Technology,
University Heights, Newark, New Jersey, USA
2Bell Laboratories, Lucent Technologies, Holmdel, USA
3Brimrose Corporation of America, Baltimore, USA
A 980-nm pump induced nonlinear refractive index change n2 of Erbium-doped (20-m) and Ytterbium-doped (10-m) fibers have been measured at 1.064 mm by time-delayed photorefractive beam-coupling in a co-propagating and counter-propagating geometry. It is found that the n2 decreases in the presence of the pump beam a non-trivial experimental fact. The change was calculated using the density matrix approach and was shown to be consistent with the experimental 5-10% measured experimental change. Future experiments are proposed at 1.55-mm for telecommunications.
