VECSEL Optimization Using Microscopic Many-Body Physics
VECSEL Optimization Using Microscopic Many-Body Physics
复制标题
使用微观多体物理进行 VECSEL 优化
DOI：
--
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发表时间：
2011
影响因子：
4.9
通讯作者：
S. Koch
中科院分区：
文献类型：
--
作者：
J. Hader;Tsuei;J. Yarborough;C. Dineen;Y. Kaneda;J. Moloney;B. Kunert;W. Stolz;S. Koch
垂直外腔表面发射激光器 (VECSEL) 采用基于完全微观计算的材料特性（如增益和载流子复合率）的方法进行设计和分析。理论预测与已实现器件的测量特性之间具有非常好的一致性。理论模型的高精度使得人们能够确定标称设计与实际实现之间的微小偏差。这些模型用于寻找优化策略。展示了如何使用减少泵浦反射的表面涂层来大幅提高外部效率，同时保留激光波长下的增益增强腔效应。展示了不完全的泵浦吸收如何损害器件性能，以及如何使用优化的分布式布拉格反射器和金属化层来减少这个问题。改进的金属化和使用这种涂层的结合使在 1010 nm 工作的已实现的 VECSEL 的外部效率和最大功率增加了一倍以上，并且理论表明进一步的重大改进是可能的。
Vertical external cavity surface-emitting lasers (VECSELs) are designed and analyzed using an approach based on fully microscopically computed material properties like gain and carrier recombination rates. Very good agreement between theoretical predictions and measured characteristics of the realized devices is demonstrated. The high accuracy of the theoretical models allows one to determine even small deviations between the nominal designs and actual realizations. The models are used to find optimization strategies. It is shown how the external efficiency can be strongly improved using surface coatings that reduce the pump reflection while retaining the gain-enhancing cavity effects at the lasing wavelength. It is shown how incomplete pump absorption can be detrimental to the device performance and how this problem can be reduced using optimized distributed Bragg reflectors and metallization layers. A combination of improved metallization and use of such a coating more than doubles the external efficiency and maximum power for a realized VECSEL operating at 1010 nm and the theory indicates that further significant improvements are possible.