概括
这项研究引入了一种具有超宽频响应的全纤维麦克风,非常适合恶劣环境. 它的新设计利用声光信号合来提高性能.
科学领域:
- 光子学 是一个光子学.
- 声学 声学 在声学方面
- 材料科学 材料科学 材料科学
背景情况:
- 传统的麦克风面临极端温度和带宽的限制.
- 音声光学传感为强大而敏感的声学测量提供了潜力.
研究的目的:
- 开发和描述一个具有超宽带频率响应的全纤维麦克风.
- 为了证明使用微光束和隔膜结构用于声学传感的可行性.
- 为了评估麦克风在高温环境中的性能.
主要方法:
- 使用皮秒激光照射和化学蚀刻制造全纤维麦克风.
- 集成光纤,隔膜和微光束作为光学波导.
- 利用微光束中的光弹性效应来调节折射率.
- 对声压引起的光学路径变化的干涉测量探测.
主要成果:
- 从40 kHz到1600 kHz实现了超宽频率响应.
- 在80 kHz的频率下,声压敏感度高达139.89 mV/kPa.
- 已确认高温可操作性高达1000°C,低温交叉通话.
结论:
- 拟议的全纤维麦克风为声学传感提供了一个紧的超宽带解决方案.
- 它的高温生存能力使其适合要求高的应用.
- 声光设计为传统麦克风技术提供了一个有希望的替代方案.
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