http://www.electronics-eetimes.com/news/silicon-photonics-become-multibillion-dollar-market-says-yole

"The silicon photonics market is still modest with estimated sales below US$40 million in 2015 and very few companies actually shipping products in the open market: Mellanox, Cisco, Luxtera, Intel, STMicroelectronics, Acacia and Molex are part of these leading players.
Silicon photonics has been under development for years. However now, this technology is being pushed hard by large webcom companies like Facebook and Microsoft.

“Silicon photonics has reached the tipping point that precedes massive growth”, notes Dr Eric Mounier from Yole. “Indeed we estimate, the packaged silicon photonics transceiver market will be worth US$6 billion in 10 years.”