{"paper":{"title":"High-speed PAM4-based Optical SDM Interconnects with Directly Modulated Long-wavelength VCSEL","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.NI"],"primary_cat":"eess.SP","authors_text":"Aleksejs Udalcovs, Deming Liu, Gunnar Jacobsen, Guy Torfs, Haolin Li, Jiajia Chen, Johan Bauwelinck, Joris Van Kerrebrouck, Lin Gan, Lu Zhang, Markus-Christian Amann, Ming Tang, Oskars Ozolins, Richard Schatz, Rui Lin, Sergei Popov, Silvia Spiga, Songnian Fu, Weijun Tong, Xiaodan Pang, Xin Yin","submitted_at":"2018-11-13T09:46:34Z","abstract_excerpt":"This paper reports the demonstration of high-speed PAM-4 transmission using a 1.5-{\\mu}m single-mode vertical cavity surface emitting laser (SM-VCSEL) over multicore fiber with 7 cores over different distances. We have successfully generated up to 70 Gbaud 4-level pulse amplitude modulation (PAM-4) signals with a VCSEL in optical back-to-back, and transmitted 50 Gbaud PAM-4 signals over both 1-km dispersion-uncompensated and 10-km dispersion-compensated in each core, enabling a total data throughput of 700 Gbps over the 7-core fiber. Moreover, 56 Gbaud PAM-4 over 1-km has also been shown, wher"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.05536","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}