in 1958, professor townes and dr . a . l . schawlow showed theoretically that masers could be made to operate in the optical and infrared region and this work resulted in their joint paper on optical and infrared masers, or lasers ( light amplification by stimulated emission of radiation ) 一九五八年,湯斯教授和邵盧博士(arthurl.schawlow)在理論上證明maser在可見光和紅外線的范圍亦可運作,并共同發(fā)表關(guān)于可見光和紅外線激射放大器,亦即laser(lightamplificationbysimulatedemissionofradiation)的論文。