2016/09/29 by Xiao Xiong, Xiong, Xiao, Chang‐Ling Zou +9
Engineering · #Advanced Photonic Communication Systems #FOS: Physical sciences #Optical Network Technologies #Optics (physics.optics) #Photonic and Optical Devices #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1609.09221
openalex publication_date 2016/09/29 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
We propose to use the integrated aluminum nitride waveguide with engineered width variation to achieve optical frequency conversion based on χ(2) nonlinear effect on a photonic chip. We show that in an adiabatically tapered waveguide, the frequency conversion has a much broader bandwidth and the efficiency within the bandwidth is almost constant, which is favorable for short pulses. We demonstrate both analytically and numerically an "area law" for the frequency conversion, i.e. the product of bandwidth and efficiency is conserved as long as peak conversion efficiency does not saturate. The adiabatic structure shows higher saturation thresholds in pump power or interaction length, outperforming the conventional uniform waveguide design. With our approach, high-efficiency and wavefront-keeping conversion for short pulses is possible on a photonic chip, which will surely find applications for scalable on-chip information processing.