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Coherent Announces the World’s First 6-Inch Indium Phosphide Scalable Wafer Fabs Paving the Way for the Next Generation of Lasers for AI Transceivers and 6G Wireless Networks

PITTSBURGH, March 25, 2024 (GLOBE NEWSWIRE) -- Coherent Corp. (NYSE: COHR), a leading provider of compound semiconductors and high-performance optical networking solutions, announced today it has established the world’s first capability for 6-inch indium phosphide (InP) wafer fabrication, in the company’s Sherman, Texas, and Järfälla, Sweden, wafer fabs. This exciting milestone enables Coherent to increase production capacity and lower die costs for InP optoelectronic devices, widely used in applications such as coherent optical communications, datacom transceivers, AI interconnects, advanced sensing for consumer electronics and wearables, medical and automotive applications, and, in the future, in 6G wireless and satellite communications networks.

Coherent InP wafer

“We are very excited to announce our 6-inch indium phosphide wafer fabrication capability in both our Sherman and Järfälla fabs, which is a result of our continuous investment in innovation and technology development, and our years of investment and operating experience in high-volume VCSEL array manufacturing for mobile handsets,” said Dr. Giovanni Barbarossa, Chief Strategy Officer and President, Materials Segment. “Vertical integration at scale is a core strategy that we have been relying upon in several of our markets, and it has enabled our optoelectronics products to win in the marketplace by delivering world-class quality, performance, time-to-market, and cost advantage.”

“Moving to 6-inch wafers will enable us to continue to deliver massive productivity improvements, including manufacturing 4x the number of devices per wafer, achieve a greater than 60% reduction in die cost, and allow us to transition our fabs to higher-capacity, more-efficient automated process tools,” said Dr. Beck Mason, Executive Vice President, Telecommunications. “This capability will allow us to meet the growing demand for our indium phosphide products in several of our core markets, while enhancing our competitiveness and profitability.”

Coherent is in the process of qualifying several existing products on its 6-inch InP platform, including a 200G electro-absorption modulated laser (EML), 200G distributed-feedback laser and Mach-Zehnder modulator (DFB-MZ), 100G EML, high-speed photodetectors, and high-power CW lasers for silicon photonics applications. The company expects to transition the bulk of its production from 3-inch InP to 6-inch InP in the next few years to fully leverage the benefits of larger wafer size, higher yield, and improved performance that will be required to provide a sustainable competitive advantage in its communications and sensing markets.

About Coherent

Coherent empowers market innovators to define the future through breakthrough technologies, from materials to systems. We deliver innovations that resonate with our customers in diversified applications for the industrial, communications, electronics, and instrumentation markets. Headquartered in Saxonburg, Pennsylvania, Coherent has research and development, manufacturing, sales, service, and distribution facilities worldwide. For more information, please visit us at


Amy Wilson
Manager, Corporate Communications

A photo accompanying this announcement is available at

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