The DX centre
T.N. Morgan
Semiconductor Science and Technology
We have shown that very large nonlinear shifts ranging from π/4 to π/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n2 values extracted from independent observationsof self-phase modulation and direct interferometric measurements are as large as 10-12 cm2/W at relatively modest input intensities from 30 to 60 MW/cm2. The cascading origin of large n2 values was fully confirmed by z-scan measurements performed on a single DAN crystal. © 1994.
T.N. Morgan
Semiconductor Science and Technology
A. Reisman, M. Berkenblit, et al.
JES
O.F. Schirmer, W. Berlinger, et al.
Solid State Communications
Douglass S. Kalika, David W. Giles, et al.
Journal of Rheology