Optical Fiber (IMAGE) The Hong Kong Polytechnic University Caption This is a photo of the optical fiber -- PolyU breaks the world record of fastest optical communications speed for data centers by reaching 240 G bit/s over 2km, 24 times of the existing speed available in the market at one-fourth of the existing cost. Credit The Hong Kong Polytechnic University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.