Open AccessMean Differential Continuous Pulse Method for Accurate Optical Measurements of Light-Emitting Diodes and Laser Diodes
Author(s) -
Yuqin Zong,
Jeff Hulett,
Naomasa Koide,
Yoshiki Yamaji,
Cynthia Miller
Publication year - 2021
Publication title -
journal of research of the national institute of standards and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.202
H-Index - 59
eISSN - 2165-7254
pISSN - 1044-677X
DOI - 10.6028/jres.126.034
Subject(s) - light emitting diode , diode , laser , ultraviolet , optoelectronics , materials science , pulse (music) , optics , physics , detector
Limited sources exist for the application of germicidal ultraviolet (GUV)radiation. Ultraviolet light-emitting diodes (UV-LEDs) have significantly improved inefficiency and are becoming another viable source for GUV. We have developed a meandifferential continuous pulse method (M-DCP method) for optical measurements oflight-emitting diodes (LEDs) and laser diodes (LDs). The new M-DCP method provides animprovement on measurement uncertainty by one order of magnitude compared to theunpublished differential continuous pulse method (DCP method). The DCP method wasalready a significant improvement of the continuous pulse method (CP method) commonlyused in the LED industry. The new M-DCP method also makes it possible to measure UV-LEDswith high accuracy. Here, we present the DCP method, discuss the potential systematicerror sources in it, and present the M-DCP method along with its reduced systematicerrors. This paper also presents the results of validation measurement of LEDs using theM-DCP method and common test instruments.