首页> 外文会议>Conference on Gravitational-Wave Detection, Aug 23-25, 2002, Waikoloa, Hawaii, USA >Optical displacement sensor (ODS), a LISA'S inertial reference sensor candidate
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Optical displacement sensor (ODS), a LISA'S inertial reference sensor candidate

机译:光学位移传感器(ODS),LISA的惯性参考传感器候选

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We propose here an optical displacement sensor (ODS) as a supplemental or backup sensor for the LISA inertial reference sensor concept. This simple ODS consists of a laser diode and a quad-cell photodiode (both commercially available). The inertial mass' reflective surface directs the laser beam onto the quad-cell photodiode. Changes in the inertial mass' position and orientation are then extracted from ratios of the differences and sums of the quad-cell photodiode outputs. A simpler proto-type using a 200 microns wide slit has demonstrated a resolution of 10 nm/(Hz)~(1/2) at 1 mHz and 1 nmA/(Hz)~(1/2) above 5 mHz. The electronics noise was 1 nm/(Hz)~(1/2) at and above 1 mHz with simple and off the shelf electronics components. Although this ODS' current performance does not meet the LISA'S system requirement of 1 nmA/(Hz)~(1/2) at 1 mHz, we think that is achievable in the near future.
机译:我们在此提出一种光学位移传感器(ODS),作为LISA惯性参考传感器概念的补充或备用传感器。这种简单的ODS由一个激光二极管和一个四单元光电二极管(均为市售)组成。惯性质量的反射表面将激光束引导到四单元光电二极管上。然后,从四单元光电二极管输出的差和之和的比率中提取惯性质量的位置和方向的变化。使用200微米宽的狭缝的更简单的原型已经证明,在1 mHz时分辨率为10 nm /(Hz)〜(1/2),在5 mHz以上时分辨率为1 nmA ​​/(Hz)〜(1/2)。在1 mHz及以上时,电子噪声为1 nm /(Hz)〜(1/2),且电子元器件简单易用。尽管此ODS的当前性能不能满足LISA在1 mHz时的系统要求1 nmA ​​/(Hz)〜(1/2),但我们认为这在不久的将来是可以实现的。

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