Ramaswamy Anand, Nunoya Nobuhiro, Williams Keith J, Klamkin Jonathan, Piels Molly, Johansson Leif A, Hastings A, Coldren Larry A, Bowers John E
Department of Electrical & Computer Engineering, University of California Santa Barbara, Santa Barbara, CA 93106, USA.
Opt Express. 2010 Feb 1;18(3):2317-24. doi: 10.1364/OE.18.002317.
Accurately characterizing third order intermodulation distortion (IMD3) in high-linearity photodiodes is challenging. Two measurement techniques are evaluated-a standard two-tone measurement and a more complicated three-tone measurement technique to measure IMD3. A model of the measurement system is developed and used to analyze the limitations of the two techniques in determining the distortion of highly linear photodiodes. Experimental validation is provided by comparing the simulation trends with IMD3 results measured on two types of waveguide photodiodes: 1) an InP based uni-traveling-carrier (UTC) photodiode and 2) a Ge n-i-p waveguide photodetector on Silicon-on-Insulator (SOI) substrate.
