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Proceedings Paper

Quantifying direct DQPSK receiver with integrated photodiode array by assessing an adapted common-mode rejection ratio
Author(s): J. Wang; M. Lauermann; C. Zawadzki; W. Brinker; Z. Zhang; D. de Felipe; N. Keil; N. Grote; M. Schell
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Paper Abstract

In this work, a direct DQPSK receiver was fabricated, which comprises a polymer waveguide based delay-line interferometer (DLI); a polymer based optical hybrid, and two monolithic pairs of > 25 GHz bandwidth photodiodes that are vertically coupled to the polymer planar lightwave circuit (PLC) via integrated 45° mirrors. The common mode rejection ratio (CMRR) is used to characterize the performance of coherent receivers, by indicating the electrical power balance between the balanced detectors. However, the standard CMRR can only be measured when the PDs can be illuminated separately. Also, the standard CMRR does not take into account the errors in the relative phases of the receiver outputs. We introduce an adapted CMRR to characterize the direct receiver, which takes into account the unequal responsivities of the PDs, the uneven split of the input power by the DLI and hybrid, the phase error and the extinction ratio of the DLI and hybrid.

Paper Details

Date Published: 28 November 2011
PDF: 6 pages
Proc. SPIE 8308, Optoelectronic Materials and Devices VI, 83080R (28 November 2011); doi: 10.1117/12.904384
Show Author Affiliations
J. Wang, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
M. Lauermann, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
C. Zawadzki, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
W. Brinker, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
Z. Zhang, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
D. de Felipe, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
N. Keil, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
N. Grote, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)
M. Schell, Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut (Germany)


Published in SPIE Proceedings Vol. 8308:
Optoelectronic Materials and Devices VI
Guang-Hua Duan, Editor(s)

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