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Takahashi, Minami; Sasai, Takeo; Yamazaki, Etsushi; Kisaka, Yoshiaki
Journal of lightwave technology, 05/2024Journal Article
In polarization-multiplexed digital coherent systems, polarization dependent loss (PDL) is a dominant factor limiting the capacity and distance of fiber-optic transmission systems. In this paper, we propose polarization-wise power profile estimation (PPE) based on a linear least squares algorithm to estimate the value and location of excessive PDLs. The method visualizes polarization-wise signal power profiles at a coherent receiver with high sensitivity. We also experimentally demonstrate that PPE can detect PDL in an optical multi-span transmission link using the method. The experiment was performed using dual-polarization transmission over a 3-span × 50-km link, with a PDL resolution of 1-3 dB and a spatial step size of 1 km. In high power conditions, all estimated PDL values agree with actual values with estimation errors of well below 0.5 dB.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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