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Coherent-optical in-line add/drop of PDM tributaries of subcarrier multiplexed signals

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


IEEE Photonics Technology Letters 28 (2016), No.13, pp.1465-1468
ISSN: 1041-1135
Journal Article
Fraunhofer HHI ()

We propose an extended coherent optical add/drop multiplexing scheme, in which an individual polarization tributary in a polarization-division multiplexed orthogonal frequency-division multiplexed signal is erased and added by frequency conversion in fiber, which is sequentially inserted in a transmission line. In the scheme, a polarization tributary can be inserted and replaced in a dual polarization spectrally overlapped ultra-dense multiplexed signal. In a proof-of-concept demonstration, we investigate the performance of the proposed optical add/drop multiplexing scheme. A 25-Gb/s quadrature phase-shift keying tributary within a dual-polarization three subcarrier orthogonal frequency division multiplexed signal is erased and added with negligible distortion of the orthogonal polarization tributary and the adjacent subcarriers.