Exhibit 99.1 Applied Optoelectronics Reports Fourth Quarter and Full Year 2023 Results Sugar Land, Texas, February 22, 2024 – Applied Optoelectronics, Inc. (NASDAQ: AAOI), a leading provider of fiber-optic access network products for the internet datacenter, cable broadband, telecom and fiber-to-the-home (FTTH) markets, today announced financial results for its fourth quarter and full year ended December 31, 2023. “We’re pleased by the continued progress we have made in improving our gross margin, which com ...