Method to control near-field bowing of laser diode arrays by balancing the thermal-induced stress | |
Zhang, Hongyou1,3,4; Zah, Chung-En1; Liu, Xingsheng1,2,3,4 | |
刊名 | OPTICAL ENGINEERING |
2020-03 | |
卷号 | 59期号:3 |
关键词 | thermal induced stress diode laser arrays near-field bowing SMILE |
ISSN号 | 0091-3286;1560-2303 |
DOI | 10.1117/1.OE.59.3.036104 |
产权排序 | 1 |
英文摘要 | Due to the thermal-induced stress during the bonding process, the emitters in a laser diode array (LDA) are vertically displaced, which causes the near-field bowing of a laser diode bar (i.e., the SMILE effect). Near-field bowing degrades the laser beam brightness, adversely affecting optical coupling and beam shaping, resulting in a larger divergence angle and a wider line after focusing and collimation. The mechanism of near-field bowing has been theoretically studied, in which the ratio of tensile strength between submount and heat sink has a great effect on the deformation of LDAs. Arm-wrestling between CuW submount and heat sink vividly describes that the deformation of LDAs changes as a function of the ratio of two materials' tensile strength. We design a symmetrical structure that bonds another submount on the bottom of the heat sink to control the SMILE effect by balancing the acting force from the top of the heat sink. The deformation of the heat sink and LDAs are approximately zero when the thermal-induced stresses forced on the top and bottom of the heat sink are equal. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) |
语种 | 英语 |
出版者 | SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS |
WOS记录号 | WOS:000523350500035 |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/93376] |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
通讯作者 | Zhang, Hongyou |
作者单位 | 1.Focuslight Technologies Inc., Xi'an, Shaanxi, China; 2.University of Chinese Academy of Sciences, Center of Materials Science and Optoelectronics Engineering, Beijing, China 3.University of Chinese Academy of Sciences, Beijing, China; 4.Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an, Shaanxi, China; |
推荐引用方式 GB/T 7714 | Zhang, Hongyou,Zah, Chung-En,Liu, Xingsheng. Method to control near-field bowing of laser diode arrays by balancing the thermal-induced stress[J]. OPTICAL ENGINEERING,2020,59(3). |
APA | Zhang, Hongyou,Zah, Chung-En,&Liu, Xingsheng.(2020).Method to control near-field bowing of laser diode arrays by balancing the thermal-induced stress.OPTICAL ENGINEERING,59(3). |
MLA | Zhang, Hongyou,et al."Method to control near-field bowing of laser diode arrays by balancing the thermal-induced stress".OPTICAL ENGINEERING 59.3(2020). |
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