波长啁啾体布拉格光栅外腔实现激光二极管阵列的波长光束组合
Wavelength beam combining of laser diode array by wavelength-chirped volume Bragg grating external cavity
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摘要: 采用波长啁啾体布拉格光栅外腔，利用多波长光束组合技术成功实现了由49个发光单元构成、阵列发光单元宽度为100 μm、填充因子为0.5的标准1 cm阵列的输出光的光束组合连续工作时，实验获得组合输出光束平均功率为11.2 W的近圆形光斑输出，其快慢轴方向光束质量平方因子约为6，最大工作电流对应的组合效率约为30%。通过进一步实验验证其最大工作电流时组合效率可达64%，并对其技术优势和应用前景做了讨论。
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关键词:
- 波长啁啾体布拉格光栅 /
- 二极管激光阵列 /
- 多波长光束组合 /
- 衍射光栅
Abstract: With an external cavity containing a wavelength-chirped volume Bragg grating, multi-wavelength beam combining is realized with a standard bar of 49 emitters. The width of the emitter is 100 μm, and the fill factor is 0.5. Beam quality factor of 6 for both the fast axis and the slow axis is achieved at CW operating, and a nearly round output spot of high intensity with a peak power of 11.2 W is gotten. The efficiency at the maximum operating current is about 30%. An efficiency of 64% at maximum working current is proven in a more detailed experimental study. The technical advantages and possible applications are discussed. -
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