用中文解释一下：These interferometry techniques are designed to maximize the conversion of strain to optical signal, thereby minimizing the impact of photon shot noise (the principal noise at high frequencies). High strain sensitivity also requires that the test masses have low displacement noise, which is achieved by isolating them from seismic noise (low frequencies) and designing them to have low thermal noise (intermediate frequencies). Each test mass is suspended as the final stage of a quadruple-pendulum system [56], supported by an active seismic isolation platform [57]. These systems collectively provide more than 10 orders of magnitude of isolation from ground motion for frequencies above 10 Hz. Thermal noise is minimized by using low-mechanical-loss materials in the test masses and their suspensions: the test masses are 40-kg fused silica substrates with low-loss dielectric optical coatings [58,59], and are suspended with fused silica fibers from the stage above [60]

这段话解释了干涉测量技术的设计原理，旨在将应变最大限度地转化为光学信号，从而最小化光子射击噪声对测量结果的影响（在高频率下是主要噪声）。高应变灵敏度还要求测试质量具有低位移噪声，这是通过将其隔离于地震噪声（低频）并设计其具有低热噪声（中频）来实现的。每个测试质量都悬挂在四重摆系统的最后一级，由主动地震隔离平台支持。这些系统在10 Hz以上的频率范围内提供了超过10个数量级的地面运动隔离。使用低机械损耗材料制作测试质量和支撑结构，同时将其冷却到低温以最小化热噪声。测试质量是40千克的熔融二氧化硅基底，带有低损耗的介电光学涂层，并用熔融二氧化硅纤维从上方的舞台上悬挂。