A low Etendue (6.1 mm2) yellow-green solid-state light source with optical conversion efficiency up to 101.3 lumen/Watt is demonstrated by through high power laser diode pumping of a static LuAG:Ce transparent ceramic plate. A 443 nm blue laser diode array with a full-width-half-maximum (FWHM) of <1.5 nm and maximum output power of 15.2 W is used to attain a high spectral absorption efficiency. The output from the high power laser diode array is collimated, shaped, despeckled and focused to display a Gaussian-like profile with a 1.5 mm beam waist (1/e2 radius) to stimulate a 1.2 mm thick LuAG:Ce transparent ceramic plate with an emission FWHM spectra at 505-585 nm. No thermal quenching, pump absorption saturation and obvious luminous flux decrease is found during test.
|Cyfnodolyn||IEEE Photonics Technology Letters|
|Dynodwyr Gwrthrych Digidol (DOIs)|
|Statws||Cyhoeddwyd - 15 Mai 2018|