Zg. Chen et al., SEQUENTIAL FORMATION OF MULTIPLE DARK PHOTOREFRACTIVE SPATIAL SOLITONS - EXPERIMENTS AND THEORY, Journal of the Optical Society of America. B, Optical physics, 14(6), 1997, pp. 1407-1417
Steady-state dark photorefractive spatial screening solitons are obser
ved in an odd- or even-number sequence when a laser beam that contains
a dark stripe generated from a phase or amplitude discontinuity in th
e center of the beam is launched into a biased bulk strontium barium n
iobate crystal. If the initial width of the dark stripe is small, only
a fundamental soliton or a Y-junction soliton is generated, correspon
ding to the lowest order in the odd- or even-number soliton sequence.
As the initial width and the bias field are increased, we observe a pr
ogressive transition from a lower-order soliton to a sequence of highe
r-order multiple solitons. We show that these dark solitons induce sta
ble waveguides that can guide an intense beam of a different wavelengt
h into multiple channels. Comparisons between experiments and theory o
n multiple dark spatial solitons are presented and shown to be in good
agreement. (C) 1997 Optical Society of America.