Open AccessNovel directional coupled waveguide photodiode–concept and preliminary results
Author(s) -
Meredith N. Draa,
J. J. Bloch,
Dingbo Chen,
David C. Scott,
g Chen,
Steven Bo Chen,
Xucai Yu,
William S. C. Chang,
Paul K. L. Yu
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.017729
Subject(s) - photodiode , responsivity , photocurrent , optics , optoelectronics , materials science , waveguide , avalanche photodiode , capacitance , photodetector , detector , physics , electrode , quantum mechanics
A novel photodiode is presented using a directional coupler incorporated with a UTC style photodiode with 0.88 A/W responsivity and 35 dBm OIP3 at 25 mA. The device responsivity is characterized at various photocurrents up to 10 mA and the OIP3 is measured up to 25 mA and 10 GHz. Additionally, the device capacitance is measured and used to model the capacitance limited OIP3 of the device. The failure of the device was compared to a traditional waveguide photodiode showing burnout no longer occurs at the front of the device and demonstrated the potential of the new design to control the photocurrent density profile for a waveguide style photodiode.