In this letter, we propose and experimentally demonstrate a new orthogonal labeling scheme based on a 40-Gb/s differential phase-shift keying payload and a 2.5-Gb/s polarization-shift keying label, which entirely eliminates the modulation crosstalk between the payload and label and shows negligible swapping penalty.
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- optical label swapping
- differential phase-shift keying (DPSK)
- polarization-shift keying (PolSK)