Author(s): Yang, J (Yang, Jing); Huang, YJ (Huang, Yu-Jie); Liu, ZS (Liu, Zong-Shun); Zhang, YH (Zhang, Yu-Heng); Liang, F (Liang, Feng); Zhao, DG (Zhao, De-Gang)

Source: OPTICS LETTERS Volume: 49 Issue: 5  Pages: 1305-1308  DOI: 10.1364/OL.515502  Published Date: 2024 MAR 1 

Abstract: Temperature characteristics of GaN-based laser diodes are investigated. It is noted that the characteristic temperature of the threshold current (T0) decreases with decreasing lasing wavelength for GaN-based LDs. The performance deteriorates seriously for UV LDs at high temperature. It is ascribed to the increase of carriers escaping from quantum wells due to the lower potential barrier height. In this Letter, AlGaN is used as the barrier layer in UV LDs instead of GaN to improve the temperature characteristic of the threshold current and slope efficiency by increasing the potential barrier height of quantum wells. Based on this structure, a high output power of 4.6 W is obtained at the injection current of 3.8 A; its lasing wavelength is 386.8 nm. (c) 2024 Optica

Accession Number: WOS:001202853400002

PubMed ID: 38426999

ISSN: 0146-9592

eISSN: 1539-4794