Luxtera, which makes lightning-fast optical chips, announced today it has raised $21.7 million in a third round of funding.

Luxtera makes components dubbed silicon CMOS (complimentary metal oxide semiconductor) photonics, which uses optical systems to transfer data at speeds much faster than the electrical wires of chips. But in contrast to earlier optical systems, these components are built into silicon chips. The investment shows it takes a lot of engineering work to build these components and there is a lot of potential from putting money into advanced input-output technologies.

Martin Colombatto, a former Broadcom executive, has joined Luxtera’s board.

Investors include money from existing investors NEA, August Capital, Sevin Rosen, Funds, and Lux Capital, as well as new investment from Tokyo Electron, and personal investment from an unnamed “industry titan.”

“This is an exciting time for Luxtera and I am honored to be joining an organization that is seeding technology poised to be as disruptive as the mass production of CMOS photonics in silicon,” said Colombatto.

Luxtera has shipped more than 1 million 10-gigabit channels to date. Greg Young, chief executive of Luxtera, said the company has the opportunity to ship tens of millions of units over time. Luxtera was founded in 2001.