Apple today said it plans to invest $390 million in Finisar, the Texas-based supplier of its VCSEL (vertical-cavity surface-emitting lasers) wafers. Apple uses the VCSEL technology in the iPhone X to power Face ID, Animoji, and portrait photography in the TrueDepth camera. VCSELs are also found in the AirPods headphones for sensing proximity. The investment will allow Finisar to re-open a plant and employ 500 new engineers and technicians. Apple says 100% of the VCSELs it plans to purchase will be made in Texas. The plant, expected to be producing by mid-2018, will be powered entirely be renewable sources. The investment comes from a $1 billion fund Apple set aside to foster innovation and high-skilled jobs in the U.S. Earlier this year, Apple agreed to invest $200 million in Corning, the company behind Gorilla Glass.