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The article discusses the use of lasers, specifically the pulsed dye laser (PDL), as an effective treatment option for acne when access to 1726-nm lasers is limited. Dr. Arielle Kauvar highlights the benefits of using lasers for acne treatment, emphasizing their effectiveness in addressing post-inflammatory hyperpigmentation and scarring. A study presented at the ASLMS 2024 annual meeting showed significant improvements in acne severity and lesion counts in patients treated with PDL, with no adverse events reported. Dr. Kauvar's research was conducted in collaboration with various companies in the field of dermatology. [Extracted from the article]

Albert Einstein predicted this quantum phenomenon when he derived the link between the A coefficient, which describes spontaneous emission, and the B coefficient, which describes the absorption and stimulated emission. The coherence of lasers distinguishes them from other light sources. Fiber lasers have a fundamental constraint in that the light intensity in the fiber cannot be so high that optical nonlinearities caused by the local electric field strength become dominant, preventing laser operation and/or leading to fiber material damage. [Extracted from the article]