TOKYO, April 6, 2021 — A light source that generates a highly stable broadband mid-infrared (MIR) beam in the wavelength range of 2.5 to 3.7 μm and that, in testing, maintained its full brightness due to its high beam quality supports the simplification of fiber optic-based environmental monitoring systems. The light source features a simple configuration and is a necessary component of a MIR fiber optic sensor that has applications in industrial and medical applications. 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