28 November 2011 Quantifying direct DQPSK receiver with integrated photodiode array by assessing an adapted common-mode rejection ratio
Author Affiliations +
Proceedings Volume 8308, Optoelectronic Materials and Devices VI; 83080R (2011); doi: 10.1117/12.904384
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China
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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Wang, M. Lauermann, C. Zawadzki, W. Brinker, Z. Zhang, D. de Felipe, N. Keil, N. Grote, M. Schell, "Quantifying direct DQPSK receiver with integrated photodiode array by assessing an adapted common-mode rejection ratio", Proc. SPIE 8308, Optoelectronic Materials and Devices VI, 83080R (28 November 2011); doi: 10.1117/12.904384; https://doi.org/10.1117/12.904384
PROCEEDINGS
6 PAGES


SHARE
KEYWORDS
Receivers

Polymers

Palladium

Photodiodes

Waveguides

Hybrid optics

Mirrors

Back to Top