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GaN‐based high‐output‐power blue laser diodes for display applications
Author(s) -
Miyoshi Takashi,
Kozaki Tokuya,
Yanamoto Tomoya,
Fujimura Yasushi,
Nagahama Shinichi,
Mukai Takashi
Publication year - 2007
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.2709737
Subject(s) - diode , materials science , optoelectronics , laser , power (physics) , voltage , current (fluid) , degradation (telecommunications) , computer science , electrical engineering , optics , telecommunications , physics , quantum mechanics , engineering
— We succeeded in fabricating high‐output‐power blue (445 nm) laser diodes (LDs) with an output power of 500 mW. The operating current, voltage, and wall‐plug efficiency of these LDs were 480 mA, 4.8 V, and 21.7%, respectively. The lifetime of these LDs was estimated to be 10,000 hours under continuous‐wave operation at 25°C. From examination of the degradation mode, we found that the operating current seriously affects the lifetime of LDs. In the next stage, we will focuse on the optimization and sophistication of the manufacturing processes to fabricate longer‐lifetime (>30,000 hours) blue LDs.