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Coherent subcarrier processing node based on optical frequency conversion and free-running lasers

: Richter, T.; Schmidt-Langhorst, C.; Elschner, R.; Kato, T.; Tanimura, T.; Watanabe, S.; Schubert, C.


Journal of Lightwave Technology 33 (2015), No.3, pp.685-693
ISSN: 0733-8724
Journal Article
Fraunhofer HHI ()

We demonstrate the use of frequency conversion in optical fiber to implement a coherent add/drop architecture. Its application is experimentally investigated in an optical frequency-division multiplexing scenario with up to three subcarriers which are modulated by quadrature phase-shift keying. We show sub-carrier drop and replacement in a bus topology. Furthermore, we quantify tolerances with respect to delay and amplitude mismatch by experiments and simulations. Finally, we discuss on the scalability of the scheme.