DOMAIN BROADENING IN QUASI-PHASE-MATCHED NONLINEAR-OPTICAL DEVICES

Dominant factors influencing domain broadening in periodically poled f erroelectric domain structures for quasi-phase-matched nonlinear optic al converters are studied. it is shown that fabricated patterned switc hing electrode gives rise to a high tangential field causing polarizat ion inversion behind an isolated layer of the patterned electrode. The domain broadening depends on basic electron parameters of a ferroelec tric crystal such as surface electron concentration and electron mobil ity. (C) 1998 American Institute of Physics.