We show that electrostriction contributes significantly to self-action effects in optical fibers, adding 19% to the nonlinear refractive index for fields that vary slowly compared with the ~1-ns time scale of the acoustic response. Electrostriction also modifies the tensor nature of the nonlinear-optical response. The electrostrictive nonlinearity is the origin of the observed difference between measurements of n2 with cw and mode-locked lasers.
© 1996 Optical Society of America
Eric L. Buckland and Robert W. Boyd, "Electrostrictive contribution to the intensity-dependent refractive index of optical fibers," Opt. Lett. 21, 1117-1119 (1996)