Characterization of high‐photocurrent and high‐speed INP‐based uni‐traveling‐carrier photodiodes at 1.55‐μm wavelength

Abstract

We demonstrate a semi‐analytical parameter extraction method to characterize high‐speed and high‐photocurrent InP‐based uni‐traveling‐carrier photodiodes with dipole‐doped structure. The accuracy of proposed method has been validated with good agreements between the measured and simulated results of reflection coefficients and frequency responses in a wide frequency range up to 40 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2156–2162, 2016

High-speed and high-photocurrent InP-based uni-traveling-carrier photodiode

“…The accuracy of the results depends greatly on the parameters of the equivalent circuit model; thus a good equivalent circuit model is not merely helpful for prediction of the performances of devices but also important for extracting model parameters conveniently and accurately [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Numerical optimization techniques are usually used to determine the optimal values of model parameters [35,38].…”

“…However, the accuracy of the optimization methods can vary largely up to the optimization method used and the initial values of model parameters selected [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. Nonphysical and nonunique results of the extracted parameter could be generated.…”

“…And curve-fitting errors and discontinuous or inaccurate high-order derivatives in current and voltage expressions, always lead to inaccurate predictions of intermodulation distortion (IMD). Different equivalent such as physics-driven modeling, analytical modeling, empirical modeling and equivalent circuit modeling, have been investigated (especially for PIN-PDs), an accurate equivalent circuit model, which accounts for the unique device structure and operation mechanism of UTC-PD with dipole-doped structure is still lacking [24][25][26]. Wu et al [27] proposed an analytical equivalent circuit model for nearballistic UTC-PD.…”