Sathian, Juna, Breeze, Jonathan D., Richards, Benjamin, Alford, Neil McN. and Oxborrow, Mark (2017) Solid-state source of intense yellow light based on a Ce:YAG luminescent concentrator. Optics Express, 25 (12). pp. 13714-13727. ISSN 1094-4087
|
Text
oe-25-12-13714.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (2MB) | Preview |
Abstract
A luminescent concentrator functioning as a bright source of yellow light is reported. It comprises a waveguide made of cerium-doped YAG crystal, in the form of a long-thin rectangular strip, surrounded by flowing air and optically pumped from both sides with blue light from arrays of high-efficiency InGaN LEDs. Phosphor-converted yellow light, generated within the strip, is guided to a glass taper that is butt-coupled to one of the strip’s end faces. Up to 20 W of optical power, centered on 575 nm with a linewidth of 76 nm, can be continuously radiated into air from the taper’s 1.67 mm × 1.67 mm square output aperture. The intensity of the outputted light is significantly greater than what any yellow (AlGaInP) LED can directly produce (either singly or arrayed), with only a modest increase in linewidth. Furthermore, the wall-plug efficiency of the source exceeds that of any yellow laser. The concept allows for further substantial increases in intensity, total output power and wall-plug efficiency through scaling-up and engineering refinements.
Item Type: | Article |
---|---|
Subjects: | F300 Physics |
Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
Depositing User: | Elena Carlaw |
Date Deposited: | 30 Jul 2019 09:26 |
Last Modified: | 01 Aug 2021 11:03 |
URI: | http://nrl.northumbria.ac.uk/id/eprint/40203 |
Downloads
Downloads per month over past year