Low Etendue Yellow-Green Solid-State Light Generation by Laser-Pumped LuAG:Ce Ceramic

Kang Li*, Yun Shi, Fuqiang Jia, Chris Price, Yongkang Gong, Jungang Huang, Nigel Copner, Hui Cao, Lingzhen Yang, Shuo Chen, Haohong Chen, Jiang Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (SciVal)

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.

Original languageEnglish
Pages (from-to)939-942
Number of pages4
JournalIEEE Photonics Technology Letters
Volume30
Issue number10
DOIs
Publication statusPublished - 15 May 2018
Externally publishedYes

Keywords

  • diode laser
  • Light sources
  • optical pumping
  • phosphor ceramic
  • photoluminescence

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