Photonics Research, 2018, 6 (5): 05000B37, Published Online: Jul. 10, 2018
Nonlinear optical properties of integrated GeSbS chalcogenide waveguides Download: 570次
Abstract
In this paper, we report the experimental characterization of highly nonlinear GeSbS chalcogenide glass waveguides. We used a single-beam characterization protocol that accounts for the magnitude and sign of the real and imaginary parts of the third-order nonlinear susceptibility of integrated Ge 23 Sb 7 S 70 (GeSbS) chalcogenide glass waveguides in the near-infrared wavelength range at λ = 1580 nm . We measured a waveguide nonlinear parameter of 7.0 ± 0.7 W 1 · m 1 , which corresponds to a nonlinear refractive index of n 2 = ( 0.93 ± 0.08 ) × 10 18 m 2 / W , comparable to that of silicon, but with an 80 times lower two-photon absorption coefficient β TPA = ( 0.010 ± 0.003 ) cm / GW , accompanied with linear propagation losses as low as 0.5 dB/cm. The outstanding linear and nonlinear properties of GeSbS, with a measured nonlinear figure of merit FOM TPA = 6.0 ± 1.4 at λ = 1580 nm , ultimately make it one of the most promising integrated platforms for the realization of nonlinear functionalities.
Samuel Serna, Hongtao Lin, Carlos Alonso-Ramos, Anupama Yadav, Xavier Le Roux, Kathleen Richardson, Eric Cassan, Nicolas Dubreuil, Juejun Hu, Laurent Vivien. Nonlinear optical properties of integrated GeSbS chalcogenide waveguides[J]. Photonics Research, 2018, 6(5): 05000B37.