稳定度优于6.44×10-13.在此基础上建立了绝对频率的直接测量系统,即利用波长计直接测量光梳的齿数n,并通过拍频法,测出633nm半导体激光频标与飞秒光梳的差频,从而计算出相应谱线的绝对频率.
一种快速锁相功能，也可以启用，使11日至22日开关时间取决于绝对频率和步长毫秒。
A fast phase-lock feature can also be enabled to give switch times between 11 and 22 ms depending on absolute frequency and step size.
为了实现真正的基态，物理学家不得不将光束冷却到接近绝对零度，他们还要通过使光束保持静止来增大其频率，让量子尺度变得尽可能大。
To reach the ground state, physicists had to cool their beams to nearly absolute zero.They also had to make the quanta as large as possible by making a beam stiffer to increase its frequency.
为了实现真正的基态，物理学家不得不将光束冷却到接近绝对零度，他们还要通过使光束保持静止来增大其频率，让量子尺度变得尽可能大。
To reach the ground state, physicists had to cool their beams to nearly absolute zero. They also had to make the quanta as large as possible by making a beam stiffer to increase its frequency.
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