What is the maximum internet speed available through fiber optics media?

Fiber Internet is available to businesses just about everywhere and home users in specific locations. At speeds up to1 Gigabit per second, fiber delivers downloads rapidly. Even if your broadband is running atMbps, (which is extremely generous - the average broadband download speed in the U.S is.2Mbps), downloading a game, one hundred songs, a HD movie or one hundred photos is up to times faster with Gigabit fiber.

Theoretically it is petabits per second for transmitting to a distance of KM as per latest papers from bell lab. Practically it comes around1pb/s for KMs

i think it's more thanm but i'm not sure