Limitations to emission spot size in laser lighting

Ole Bjarlin Jensen; Anastasiia Krasnoshchoka; Anders Kragh Hansen; Anders Thorseth; Dominik Marti; Xu Jian; Paul Michael Petersen

doi:10.1117/12.2542674

25 February 2020 Limitations to emission spot size in laser lighting

Ole Bjarlin Jensen, Anastasiia Krasnoshchoka, Anders Kragh Hansen, Anders Thorseth, Dominik Marti, Xu Jian, Paul Michael Petersen

Author Affiliations +

Proceedings Volume 11302, Light-Emitting Devices, Materials, and Applications XXIV; 113020B (2020) https://doi.org/10.1117/12.2542674
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Laser lighting is an emerging technology to generate high luminance lighting. To achieve high luminance or high luminous exitance, the light emitter must have high flux and small size simultaneously. When laser light is focused to a small spot size on the phosphor material, the two main limitations are saturation of the phosphor material and the spot size of the generated light. Here, we investigate experimentally and numerically the spot size of laser lighting dependent on the spot size of the incident laser light and the material properties of the wavelength converting phosphor material. We find numerically that the spot size of the generated white light is significantly influenced by the phosphor properties. The spot size of the white light determines the étendue and thereby the possibility to collect and shape the light. This has important implications in applications of laser lighting.

Conference Presentation

Citation Download Citation

Ole Bjarlin Jensen, Anastasiia Krasnoshchoka, Anders Kragh Hansen, Anders Thorseth, Dominik Marti, Xu Jian, and Paul Michael Petersen "Limitations to emission spot size in laser lighting", Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 113020B (25 February 2020); https://doi.org/10.1117/12.2542674

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available