South Korea’s Yonhap news agency said that the research team of Sejong University in South Korea has successfully developed a wireless charging technology for mobile phones based on infrared ray. < / P > < p > this kind of infrared charging uses the high-power infrared light produced by semiconductor optical amplifier, which is a real long-distance wireless charging technology. The working distance can reach several meters or more, and there is almost no loss of energy in the process of transmission. In addition, multiple electronic devices can be charged at the same time in different wave bands. < p > < p > compared with RF mode, infrared wireless charging does not produce electromagnetic wave, thus avoiding the harm of electromagnetic pollution to human body. Moreover, the working distance is far beyond the current contact or proximity electromagnetic charging technology. < / P > < p > researchers said that the advent of infrared charging technology means that the Korean industry has a technical solution to respond to Huawei’s laser charging technology. The relevant theoretical research has been published in optical express last year. After that, the research team carried out applied research, and recently completed Korean and international patent applications. At present, the research team has registered commercial entities for commercial development.