Journal
OPTICS EXPRESS
Volume 30, Issue 22, Pages 40951-40964Publisher
Optica Publishing Group
DOI: 10.1364/OE.475226
Keywords
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Categories
Funding
- Key Technologies Research and Development Program [2021YFB3501700]
- National Natural Science Foundation of China [51902143, 52202135, 61971207, 61975070]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Jiangsu Provincial Key Research and Development Program [BE2019033, BE2021040]
- Natural Science Foundation of Jiangsu Province [BK20191467, BK20221226]
- Graduate Research and Innovation Projects of Jiangsu Province [KYCX22_2845]
- International Science and Technology Cooperation Program of Jiangsu Province [BZ2019063, BZ2020030, BZ2020045]
- Natural Science Research of Jiangsu Higher Education Institutions of China [19KJB430018, 20KJA430003]
- Xuzhou Science and Technology Program [KC19250, KC20201, KC20244, KC21379]
- State Key Laboratory of Advanced Materials and Electronic Components, Guangdong Fenghua Advanced Technology Holding [FHR-JS-202011017]
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A novel composite structure ceramic for transmissive laser lighting was designed and fabricated. The experimental results showed that the composite ceramic exhibited high luminous efficacy and stability under high-power laser excitation, indicating its potential for automotive lighting and laser searchlight applications.
High-power, high-brightness laser lighting promotes new requirements for light-conversion materials, such as high thermal conductivity, high saturation threshold and compact encapsulation. In this paper, we designed and fabricated a novel composite structure ceramic including a 1.0 x 1.0 mm2 Al2O3-YAG:Ce ceramic and a phi=16.0 mm transparent YAG ceramic for the transmissive configuration in laser lighting. When pumped by blue laser from 0 similar to 60 W mm2, all the samples exhibited no luminous saturation phenomenon, and the 10.0 wt.%Al2O3- YAG:Ce/YAG composite ceramic with the thickness of 0.3 mm maintained white light with a luminous efficacy over 200 lm/W. Moreover, a maximal luminous flux over 1000 lm, a correlated color temperature (CCT) of 5471 K, and an operating temperature as low as 92.3 degrees C were obtained under the excitation power density as high as 60 W/mm2. The configuration that Al2O3-YAG:Ce encapsulated by YAG reflects an excellent optical and thermal properties by using transparent and highly thermally conductive YAG materials. These results indicate that Al2O3-YAG:Ce/ YAG composite ceramic phosphor is a promising candidate in transmissive configuration for automotive lighting and laser searchlight.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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