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By having photons of a specific wavelength build up in the lasing cavity, that same-frequency emission gets stimulated over and over again.—Ethan Siegel, Big Think, 7 Aug. 2025 When the optical gain in the cavity exceeds the optical losses, the system reaches the lasing threshold, emitting laser light.—New Atlas, 13 July 2025 Canales' development of Mayfield may have left a lasing impression on Tepper.—Steve Reed, USA TODAY, 25 Jan. 2024 For example, the lasing output is highly sensitive to any change in the size or shape of the bubble.—The Physics Arxiv Blog, Discover Magazine, 30 June 2023 The result is that the burnt and recovered material form their own wave that has a wavelength and frequency that corresponds to the difference between the two (or more) colors that lase.—Chris Lee, Ars Technica, 9 May 2018 The aim right now is to keep decreasing the lasing threshold even further to completely eliminate heating issues.—IEEE Spectrum, 20 Mar. 2017