美股光通信概念股涨跌不一，Coherent涨逾4%

Group 1 - The core viewpoint of the article highlights the mixed performance of U.S. optical communication stocks on February 20, with some companies experiencing gains while others faced declines [1] Group 2 - Lumentum saw an increase of over 3% in its stock price [1] - Coherent experienced a rise of over 4% [1] - Credo Technology's stock declined by nearly 2% [1] - Lumen Technologies and Astera Labs both fell by over 1% [1]