Abstract
A compact 40-Gb/s optical receiver module with an MU-connector interface has been developed. Its packaging has three main technical features. (1) Coplanar waveguide (CPW) patterns of the waveguide photodiode (WG-PD) and of the preamplifier IC in the facing area of the flip-chip structure are optimized for impedance matching. (2) A film carrier is used to connect the preamplifier IC to an electrical coaxial connector for electrical signal output. (3) An MU-connector is used as the optical interface to reduce the module size. Optimum design enabled a module size of 14.0 mm wide, 40.4 mm long, and 9.65 mm high. Measurements showed a 3-dB down bandwidth of the optical/electrical response of at least 50 GHz and a clear open eye pattern for a 40-Gb/s nonreturn-to-zero (NRZ) signal input. This optical receiver module is suitable for large-capacity communication network systems.
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