Publication Date: 9/20/2026

Event: 52nd European Conference on Optical Communication (ECOC 2026)

Reference: pp. 1-4, 2026

Authors: Wataru Kohno, NEC Corporation; Sarper Ozharar, NEC Laboratories America, Inc.; Yaowen Li, NEC Laboratories America, Inc.; Shuji Murakami, NEC Laboratories America, Inc.; Junqiang Hu, NEC Laboratories America, Inc.; Ting Wang, NEC Laboratories America, Inc.

Abstract: We demonstrate underwater acoustic transmission of image-derived semantic messages using an over-80-km distributed fiber-optic acoustic sensing link with chirp-coded pulse interrogation,Raman amplification, and fiber-optic hydrophones. At 50 bps with Raman amplification, 100 scene-graph messages (21,193 bits) are delivered without observed errors (BER upper bound < 4.72 × 10?5). Publication Link: