On September 18, Coherent rose 4.38% in regular trading, reaching $308.00/share, with turnover of $237 million. The gain was primarily driven by the company's announcement of a comprehensive expansion of its pluggable optical line system (P-OLS) portfolio, integrating full C-band amplification technology designed to bolster AI data center network infrastructure.

The newly introduced solution leverages the full spectrum of the C-band to significantly enhance fiber transmission capacity, addressing a critical bottleneck in high-speed interconnect demands from AI workloads. This product launch follows Coherent's recent showcase at the China International Optoelectronic Exposition (CIOE), where it demonstrated multiple next-generation interconnect solutions including 6.4T slot-based CPO, 1.6T VCSEL NPO, and 12.8T XPO platforms, further reinforcing its positioning as a core supplier in AI compute optical interconnect.

The broader optical communication sector has maintained strength this week, with the stock building on prior sessions' gains fueled by the Fed's 25-basis-point rate hike being fully absorbed and multiple institutional endorsements. Goldman Sachs recently raised its global optical module market forecast substantially, projecting the market to reach approximately $677 billion to $1,485 billion between this year and the following two years, representing upgrades of 33% to 115% versus prior estimates.

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