Experiments with an 834 m2 ring laser interferometer
Experiments with an 834 m2 ring laser interferometer
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DOI：
10.1063/1.3133245
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发表时间：
2009-06-01
影响因子：
3.2
通讯作者：
Wells, J-P. R.
中科院分区：
文献类型：
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作者：
Hurst, R. B.;Stedman, G. E.;Wells, J-P. R.
在新西兰基督城的Cashmere洞穴（纬度-43.575度）建造了一个面积为834 m（2），尺寸为39.7 × 21 m（2）的超大型氦氖激光陀螺UG-2。地球自转足以解锁它，给出2.18 kHz的Sagnac频率。超级镜的透射率类似于百万分之0.18（ppm），并且光损耗出乎意料地高，类似于每次反射200 ppm。腔Q为1.5 x 10（12）。由反向散射耦合引起的残余Sagnac频率误差被测量为
An ultralarge ring He-Ne ring laser gyroscope, UG-2, with area 834 m(2) and dimensions 39.7 x 21 m(2), has been built underground at Cashmere Cavern, Christchurch, New Zealand (latitude -43.575 degrees. Earth rotation is sufficient to unlock it, giving a Sagnac frequency of 2.18 kHz. Supermirrors are used with transmission similar to 0.18 parts per million (ppm) and optical loss unexpectedly high at similar to 200 ppm per reflection. The cavity Q is 1.5 x 10(12). Residual Sagnac frequency error caused by backscatter coupling is measured as