Axcelis Technologies (AXTI.US) climbed 3% in overnight trading to $58.03, leading the optical communication sector higher on Friday (September 4). Applied Optoelectronics (AAOI.US) rose 2% to $102.31, while POET (POET.US) gained 2% to $7.47. Marvell Technology (MRVL.US) advanced 2% to $212.60, Coherent (COHR.US) added 2% to $268.82, and Lumentum (LITE.US) edged up 2% to $860.67. Corning (GLW.US) rose 1% to $147.82, while Nokia (NOK.US) gained 1% to $9.86. Among derivative ETFs, AAOX (AAOX.US) surged 4%, MVLL (MVLL.US) climbed 3%, and LITX (LITX.US) advanced 3%.

The optical communication sector rallied in overnight session as AI computing demand continues to drive expectations for 800G and 1.6T optical modules. Axcelis Technologies led gains on investor confidence in its ion implantation equipment technology amid semiconductor manufacturing capacity expansion. Light overnight volume was offset by broad-based buying interest, with most stocks closing near session highs, signaling positive market sentiment toward the optical communication space.