Speckle-free high contrast bio-imaging in dental hard tissue using random fiber laser in backscattering configuration

The size or depth of the dental caries could be underestimated by conventional dental caries detection method, such as radiography. In this paper, backscattering tooth imaging method based on near infrared random fiber laser has been investigated. We demonstrate that the random fiber laser is ideally suitable for dental caries diagnosis owing to its near infrared wavelength, high spectral density and low coherence.