We present a modified commercial L-4C geophone with interferometric readout that demonstrates a resolution 60 times lower than the included coil-magnet readout at low frequencies. The intended application for the modified sensor is in vibration isolation platforms that require improved performance at frequencies lower than 1 Hz. To illustrate it’s application a controls- and noise-model of an Advanced LIGO ‘HAM-ISI’ vibration isolation system was developed, and shows that our sensor can reduce the residual motion of the platforms by a factor of 70 at 0.1 Hz.

中文翻译：

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商用地震检波器的干涉传感

我们展示了一种改进的商用 L-4C 地震检波器，它具有干涉测量读数，在低频下显示的分辨率比随附的线圈磁铁读数低 60 倍。改进后的传感器的预期应用是需要在低于 1 Hz 的频率下提高性能的隔振平台。为了说明它的应用，开发了高级 LIGO 'HAM-ISI' 振动隔离系统的控制和噪声模型，并表明我们的传感器可以在 0.1 Hz 时将平台的残余运动减少 70 倍。