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Low Etendue yellow-green solid-state light generation by laser-pumped LuAG:Ce ceramic

Li, Kang, Shi, Yun, Jia, Fuqiang, Price, Chris, Gong, Yongkang, Huang, Jungang, Copner, Nigel, Cao, Hui, Yang, Lingzhen, Chen, Shuo, Chen, Haohong and Li, Jiang 2018. Low Etendue yellow-green solid-state light generation by laser-pumped LuAG:Ce ceramic. IEEE Photonics Technology Letters 30 (10) , pp. 939-942. 10.1109/LPT.2018.2813520

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Abstract

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 a 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 1041-1135
Date of Acceptance: 6 March 2018
Last Modified: 22 Jul 2019 09:54
URI: http://orca.cf.ac.uk/id/eprint/119577

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