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Propagation Delay of Waveguide Photodetector

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7 Author(s)
Yifei Li ; Dept. of Electr. & Comput. Eng., Univ. of Massachusetts at Dartmouth, Dartmouth, MA, USA ; Renyuan Wang ; Klamkin, J. ; Madison, S.M.
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Optical phase locked loop (OPLL) photonic integrated circuits (PIC) are critical for the high dynamic range phase modulated RF/photonic links. They provide for linear phase demodulation. A challenge for implementing the OPLL PICs is how to reduce the loop propagation delay. In this paper we analyze the delay of a waveguide photodetector, which is a critical component of an OPLL. We also introduce and experimentally validate a counter propagating photodetector device concept. This enables the elimination of the propagation delay due to the finite length of a waveguide photodetector.

Published in:

Lightwave Technology, Journal of  (Volume:28 ,  Issue: 15 )

Date of Publication:

Aug.1, 2010

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