二极管激光线阵光束的远场特性
Far-field characteristics of diode laser bar beam
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摘要: 利用X-Y函数记录仪测试了双异质结连续60 W，1×19激光二极管线阵（LDB）发射光束的空间光强分布和时间稳定性，被测样品的型号为JOLD-60-CPNN-1L。实验结果表明:组成DLB的19个二极管发射的光束基本上是独立传输的，DLB光束远场光强分布由19个子束非相干叠加而成，并且不随时间变化，发光区间距不相等。以实验为依据，对理论模型做了改进。将低注入电流的实验与用改进的理论模型的计算结果做了比较，二者符合甚好。Abstract: The far-field characteristics of a diode laser bar(DLB) (type JOLD-60-CPNN-1L) beam are studied both experimentally and theoretically. Experiments show that beams emitted from the 19 diodes, which compose the DLB, propagate nearly independently. The far-field intensity distribution of the DLB can be treated as the incoherent superposition of 19 individual beamlets and does not vary with time. The distances between the illumination zones are unequal. The theoretical model is improved in accordance with the experiments. The experimental results at low input current are compared with the numerical calculation results using the improved theoretical model and they are consistent with each other.
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