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Electrical and electronic engineering
This paper presents a compact and low-loss photonic integrated device consisting of a Y-branch and a pair of multimode interferometers (MMI) for a ratiometric wavelength monitoring around 1550 nm on silicon-on-insulator (SOI) technique. Two MMIs are designed in terms of width and length to achieve overlapping but opposite slope spectral responses used as two edge filters over a wavelength measurement range from 1500 nm to 1600 nm. The developed integrated photonic ratiometric structure demonstrates a suitable discrimination range for a high-speed passive wavelength measurement, with a high resolution better than 15 pm over a 100 nm wavelength range.
Wang, P. et al (2017). Passive photonic integrated ratiometric wavelength monitor with resolution better than 15 pm Optics Express vol. 25, no. 3, pg. 2939-2949. doi:10.1364/OE.25.002939