[U.S. Optical Communication Sector Rises Across the Board, Pure Photonics ETF FOTO Surges Over 9%] BlockBeats News, July 22, according to BIT (bit.com) market data, the U.S. optical communication sector saw a broad increase, with the Pure Photonics ETF FOTO rising over 9%, Coherent up more than 11%, Lumentum up over 9%, Ciena nearing an 8% increase, Marvell Technology and Corning both up over 6%, and Credo rising more than 5%.