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This review article emphasizes the study and realization of chromium doped bulk glasses as well as optical fibers elaborating the optical properties of various valence states of chromium in bulk glasses or fibers for photonic applications. Initial discussion on versatility of the field of application of near infrared (NIR) light sources drive researches for finding appropriate light source being crucial indicates the propriety of chromium doped glass-based sources. The optical responses of different chromium species within suitable glass host are briefed with perspective of the host’s chemical composition (glass basicity/optical basicity). Glass hosts are emphasized due to their applicability in fiber optics and photonics sectors. Various valence states of chromium (+2 to +6) can be a candidate for optical applications. A summary of advantages of glass-based chromium doped optical fibers are mentioned with a standpoint of fabrication methods. The discussion continues with the chromium doped glasses in some specific areas of applications, such as saturable absorber, dosimetry, and temperature sensing and luminescent solar concentrator separately.

Chromium Doped Glasses for Photonic Applications: A Brief Review and Prospects