概括
高功率的二氧化碳 (CO2) 激光脉冲在空气中传播数百米以上,没有外部聚焦,形成一个稳定的,直径大的通道. 这种自我通道证明了高效的长波红外线 (LWIR) 束传输,用于潜在的千米级应用.
科学领域:
- 物理 物理学 物理
- 光学是什么?光学是什么?光学是什么?
- 激光科学 激光科学
背景情况:
- 克尔自聚焦的临界功率尺度与波长.
- 长波红外线 (LWIR) 激光器需要更高的功率才能在空气中自我聚焦.
研究的目的:
- 为了证明皮秒CO2激光脉冲在空气中的自我道.
- 为了研究高功率LWIR光束的无线丝传播.
- 评估远距离LWIR脉冲传输的潜力.
主要方法:
- 产生皮秒CO2激光脉冲列车 (10微米波长) 的总能量≥20 J.
- 在没有外部聚焦的情况下,在环境空气中进行传播实验.
- 对光束通道形成和寿命的观察.
- 对自我通道制度的数值模拟.
主要成果:
- 一个直径几厘米的单一通道形成了数百米.
- 这条被称为"热气体"的通道的寿命为≥50 ms.
- 无线丝的自我通道显示出低的传播损失.
- 模拟预测了多朱尔/TW功率的LWIR脉冲传输在千米级距离上.
结论:
- 皮秒二氧化碳激光脉冲列车可以在长距离的空气中进行自我通道.
- 这种LWIR自通道模式提供了高效的光束传播和低损失.
- 这些发现支持千米级LWIR能源输送的可行性.
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