Department of Physics
Indian Institute of Technology Delhi
Solid State Lighting
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Laser Diode Based White Light Generation with Sunlike Full Spectrum and High CRI for General Purpose
Dheeraj Kumar1, Atul Kumar Dubey2, and Dalip Singh Mehta*1
1Green Photonics Lab, Department of Physics, IIT Delhi India,110016
2CReST Center, Chang Gung University, Taoyuan City 33302, Taiwan
mehtads@physics.iitd.ac.in, dheerajastrophysics2008@gmail.com
A sunlike spectrum of the white light artificial source is developed for general purpose illumination by utilizing a blue laser diode (LD) (λ=447 nm, Δλ = 5 nm, and optical power (Popt.) = 600mW) and glass sheets coated using a screen-printing technique with the Ce: YAG (yellow), red and green phosphor. These phosphor-coated sheets behave as free-standing diffuser white light sources with compatible color coordinates. The experimental results are presented in form of monitoring of photoluminance spectral, and color parameters measurements.
