Fig. 3: Ultra-broadband high-efficiency, high-speed all-optical wavelength conversion based on single-mode nonlinear spiral-rib Si3N4 integrated waveguides.
From: Ultra-broadband optical amplification using nonlinear integrated waveguides
a, Experimental set-up of the Si3N4-chip-based all-optical wavelength conversion for both intensity modulation and coherent optical communications. The on-chip pump power was 34 dBm. b, BER as a function of received optical power of 10 Gbit s−1 NRZ signals (1,680 nm) and converted idlers (1,441 nm, purple dashed line). Insets, eye diagrams of the B2B optical signals at wavelengths of 1,441 nm and 1,680 nm, respectively. c,d, Constellation diagrams for a 1,670-nm signal (c) and a 1,448-nm idler (d) with 32-GBd 16-QAM after offline digital signal processing (DSP). BPF, band-pass filter; PC, polarization controller.
