Ultrawide-band near-infrared light source over 1 mW by Sm³⁺,Pr³⁺-codoped glass phosphor combined with LED

Abstract

We have synthesized 0.3Sm2O3–0.12Pr2O3–10Bi2O3–45Sb2O3–45B2O3 glass as an ultrawide-band near-infrared phosphor for LED-based light sources. We have achieved an ultrawide-band luminescence from 760 to 1100 nm with an output power of over 1 mW by combining a blue LED with Sm3+,Pr3+-codoped borate glass in one package. Absorption bands corresponding to C–H and O–H stretchings in aqueous solutions of glucose have been observed using this light source and a multichannel spectrometer. These results indicate that the Sm3+,Pr3+-codoped borate glass combined with the blue LED is a useful novel light source for absorption spectrometry.