Abstract

Recently, a growing interest has been given to the development of travelling-wave photodetectors. In [1] Wu et al. report on a AlGaAs/GaAs travelling-wave photodetector array consisting of 27 discrete pin photodiodes periodically arranged along an electrical and an optical waveguide. The measured pulse response is 50 ps resulting in a 3dB-bandwidth of about 20 GHz. Hietala et al. [2] describe a coplanar travelling-wave photodetector on GaAs substrate with a 3dB-bandwidth of 4.8 GHz at 1 μm. Bowers et al. [3] have studied a 7 pm long waveguide photodetector on GaAs with a bandwidth of about 170 GHz at 0.83 μm.

© 1996 Optical Society of America