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Linear AWG-based modulators

: Cincotti, G.; Gomez Saavedra, B.; Kaiser, R.


Jaworski, M. ; Institute of Electrical and Electronics Engineers -IEEE-; IEEE Photonics Society:
17th International Conference on Transparent Optical Networks, ICTON 2015. Vol.2 : Budapest, Hungary, 5 - 9 July 2015
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4673-7880-2
ISBN: 978-1-4673-7881-9
International Conference on Transparent Optical Networks (ICTON) <17, 2015, Budapest>
Fraunhofer HHI ()

We numerically evaluate the performance of optical vectorial linear modulators, which consist of asymmetric power splitter, phase shifters and phase modulators (PM); 2N-level quadrature amplitude modulated (QAM) signals are generated by using only N single-drive two-level (binary) RF signals. We also demonstrate that a proper architecture design, with phase and amplitude modulators, largely increases the constellation size. Finally, we show that a more compact layout can be achieved with an arrayed waveguide grating (AWG) configuration. The influence of the insertion losses, phase distortion and power imbalance are also investigated.