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Parallel-fed traveling wave photodetector for > 100-GHz applications

: Beling, A.; Campbell, J.C.; Bach, H.-G.; Mekonnen, G.G.; Schmidt, D.


Journal of Lightwave Technology 26 (2008), No.1, pp.16-20
ISSN: 0733-8724
Journal Article
Fraunhofer HHI ()

A fully packaged traveling wave photodetector (TWPD) with monolithically integrated optical power splitter for highspeed high-power applications in excess of 100 GHz is demonstrated. The detector module provides a responsivity of 0.24 A/W with a polarization dependence of only 0.2 dB at 1.55 mu m wavelength and is suitable for the detection of RZ data rates in excess of 80 G bit/s with unsaturated peak voltages of > 0.5 V. Chip-based measurements show a broadband impedance match, a 3 dB bandwidth of 80 GHz and a maximum electrical output power of - 2.5 dBm at 150 GHz.