![]() ![]() Here, experiments carried out on whole and skim forms of two commercial brands of UHT milk presented lasing threshold values dependent on the fat concentration, suggesting that a random laser technique can be developed to monitor such important parameter. Indeed, random lasers systems are among the most promising light scattering-based tools aiming the development of photonics applications 6. Since amplification owing to light diffusion was theoretically considered in the late 60’s 3, the RL phenomena have been widely studied for potential applications in different fields of knowledge 2, 4, 5. In this particular case, light scattering plays a key role, providing incoherent or coherent feedback mechanisms that characterize this emission 2. The Random Laser (RL) phenomenon 1 occurs when a medium emits light with some conventional laser characteristics, such as threshold behavior and spectral narrowing, without being in an optical cavity.
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