Long Sophia, Lopez Lisa, Ford Bethan, Balembois François, Montis Riccardo, Ng Wern, Arroo Daan M, Alford Neil McN, Torun Hamdi, Sathian Juna
Department of Mathematics, Physics and Electrical Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, UK.
Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaiseau, France.
Commun Eng. 2025 Jul 9;4(1):122. doi: 10.1038/s44172-025-00455-w.
Room-temperature MASERs (Microwave Amplification by Stimulated Emission of Radiation) amplify electromagnetic waves at microwave frequencies with minimal noise. We demonstrate a cost-effective LED-pumped maser using pentacene-doped para-terphenyl as the gain medium. Here, we show that LED light, which is brightness-enhanced and guided via a cerium-doped yttrium aluminium garnet luminescent concentrator, achieves persistent maser emission at 1.45 GHz with a duration of 200 µs and a microwave output power of 0.014 mW, surpassing previous non-laser pumped systems. Operating at low voltage, the LED-pumped maser ensures safety, reduced costs, and simple integration. Potential applications include sensitive magnetic resonance imaging, portable atomic clocks, quantum technologies, and enhanced deep-space radio astronomy.
室温微波激射器（受激辐射式微波放大）能以最小的噪声放大微波频率的电磁波。我们展示了一种使用并五苯掺杂对三联苯作为增益介质的具有成本效益的发光二极管泵浦微波激射器。在此，我们表明，通过掺铈钇铝石榴石发光聚光器增强亮度并引导的发光二极管光，在1.45吉赫兹频率下实现了持续200微秒的微波激射发射，微波输出功率为0.014毫瓦，超过了以往的非激光泵浦系统。发光二极管泵浦微波激射器在低电压下运行，确保了安全性、降低了成本并简化了集成。其潜在应用包括灵敏的磁共振成像、便携式原子钟、量子技术以及增强型深空射电天文学。
