[Mixed Opening for U.S. Optical Communication Sector, Coherent Drops Over 3% Despite Strong Performance] BlockBeats News, August 13, according to BIT ((bit.com)) market data, the U.S. optical communication sector opened with mixed performance. 'Optical communication giant' Coherent dropped over 3% despite its latest quarterly earnings guidance significantly exceeding market expectations. The company reported Q4 fiscal revenue of $2.05 billion, a 34% year-over-year increase, surpassing the expected range of $1.98–$2.02 billion. It forecasts Q1 fiscal revenue of $2.2–2.4 billion, higher than the expected $2.13 billion, with adjusted EPS projected at $1.85–$2.05, exceeding the expected $1.77. The Pure-Photonics ETF FOTO rose 0.05%; Corning (GLW) fell 0.19%; Marvell Technology (MRVL) rose 1.73%; AAOI (Applied Optoelectronics) dropped 1.10%, a manufacturer of high-speed optical modules (800G/1.6T) focused on AI data center transceivers; LITE (Lumentum Holdings) fell 0.39%, a core supplier of optical communication lasers and modules, and a key player in AI data centers; COHR (Coherent Corp) dropped 3.76%, a leader in lasers, optical components, and photonic solutions, covering data center and industrial sectors; CIEN (Ciena Corporation) rose 0.93%, a producer of high-speed SerDes and connectivity chips, specializing in low-power interconnects for AI data centers.