Broad-bandwidth continuous-wave wavelength conversion in hydrogenated amorphous silicon waveguides
WANG Jiang1, XU Yonggang1, LIU Huanhuan1, ZHANG Jing1，2, ZHANG Mengqiao1, LI Yongfang1*
(1 School of Physics and Information Technology, Shaanxi Normal University, Xi′an 710119, Shaanxi, China;2 School of Electronic Engineering, Xi′an Shiyou University, Xi′an 710065, Shaanxi, China)
Abstract:
A broadband wavelength conversion is theoretically investigated based on degenerate four-wave mixing (DFWM) in hydrogenated amorphous silicon waveguides with silicon nitride inter-cladding layer (a-Si∶H-Si3N4). The addition of the silicon nitride inter-cladding layer can preserve the advantages of the a-Si∶H waveguides, and reduce the transmission loss and enhance the nonlinear effect in the communication band. Under the same conditions, the conversion efficiency and the conversion bandwidth of the a-Si∶H-Si3N4 waveguides is significantly improved. Through the optimization of the waveguide dimensions, the conversion bandwidth is expanded to 490 nm and the conversion efficiency up to 11.4 dB.
KeyWords:
wavelength conversion; optics waveguides; nonlinear optics
