Tellurium-enhanced nonresonant third-order optical nonlinearity in a germanosilicate optical fiber.
A tellurium-doped germanosilicate optical fiber was developed by modified chemical vapor deposition and solution doping techniques. Using the continuous-wave self-phase modulation method, the nonresonant nonlinear refractive index, n2, was measured to be 5.52 x 10(-20) m2/W, which is 2 to 3 times that of the undoped germanosilicate glass fiber. Polyhedron structures TeO3 and TeO4 with GeO4 and SiO4 are believed responsible for lower phonon energy, more nonbridging oxygens, and a larger hyperpolarization, leading to the observed higher nonresonant optical nonlinearity.
Lin
Aoxiang
A
Center for Optical Technologies and Physics Department, Lehigh University, Bethlehem, Pennsylvania 18015, USA. aoxiang.research@gmail.com
Liu
Xueming
X
Watekar
Pramod R
PR
Zhao
Wei
W
Peng
Bo
B
Lu
Min
M
Wei
Wei
W
Sun
Chuandong
C
Wang
Yishan
Y
Han
Won-Taek
WT
Toulouse
Jean
J