Author Affiliations
Abstract
1 Ferdinand-Braun-Institut, Leibniz-Institut fur Hochstfrequenztechnik, Gustav-Kirchhoff-Strae 4, 12489 Berlin, Germany
2 University of Applied Sciences Munich, Lothstrae 34, 80335 Munich, Germany
We present a 940 nm quasi-continuous wave semiconductor laser designed as a building block for high-power fiber coupled pump modules. The laser comprises a 400 μm narrow-stripe array mounted on an aluminum nitride substrate using hard solder. The chip has been optimized for high optical power and low lateral far-field angles. Two vertical and six lateral structure variations have been investigated to determine the best achievable performance. Operating at 1 ms pulse width and a repetition rate of 10 Hz, the laser device reaches a maximum pulse power of 86 W from a 400 μm aperture and more than 62% maximum conversion efficiency. Low lateral far-field angles (95% power enclosed) of 11.5 and 13.5°, depending on the epitaxial design, enable efficient multimode fiber coupling. The potential for highly reliable applications has been demonstrated.
diode laser high-power laser array optical fiber coupling High Power Laser Science and Engineering
2013, 1(1): 01000060
1 河北工业大学 研究生学院,天津 300401
2 河北工业大学 信息工程学院, 天津 300401
3 河北工业大学 研究生学院, 天津 300401
微通道热沉是解决高功率半导体激光器阵列散热有效的途径,本文利用有限元方法研究半导体激光器的温度,给出了横向尺寸为200 μm×60 μm 单个及间距100 μm 的3,5,9 的微通道热沉中的温度,得到微通道数量影响激光器最高温度变化。结果表明,单个微通道构成的热沉可以把注入电流为36 A 稳态工作的激光器阵列冷却到342 K,9 个微通道可以冷却到306 K。仿真了增加微通道间距的温度分布,发现为间距260 μm 的5 个微通道热沉,可以将激光器冷却到308 K。
高功率激光器阵列 微通道 温度 有限元法 激光器 high power laser array micro-channel temperature finite element method laser
