利用外腔改善半导体激光器列阵的远场特性
Improving far field characteristics of a diode laser array with external cavity
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摘要: 采用一个由快轴准直透镜和一个高反射率平面镜组成的简单外腔,在腔长为几个cm时实现了半导体激光器列阵中部分单元的锁相运行;DLA远场出现了3个瓣,每瓣发散角为10 mrad左右,对比度为50%;通过控制部分单元的输出,可以抑制旁瓣的能量。Abstract: Phase-locking of a diode laser array was achieved in a simple external cavity consisting of a fast axis collimating lens and a high-reflection coated external mirror. When the cavity length is a few centimeter, the far field pattern has 3 lobes, and the divergence of each lobe is about 10 mrad and the contrast of the far field pattern is about 50%. The energy in the side-lobes can be suppressed by blocking the output of some emitters.
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Key words:
- diode laser array /
- external cavity /
- phase locking /
- far field
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