2000年两德国人Holger Mueller and Achim Peters用低温光学共振腔重做MM试验，证明地表fringe shift 小于10-15
原理：
古老的MM试验利用十字杆测以太风。如果有以太风，那么当转动十字杆，干涉条纹会移动。光学共振腔技术发展与1979年。该技术使得我们可以获得频率极为稳定的光：频率=模式*c/(2x腔长)。我们可以采取测频差的办法测量以太风。
将两个共振腔垂直摆放，一个频率为100Khz，另一个50Khz。固定在地上。公转和自转以太风都会造成两束光的频率差变化。观测时间390天。
测量结果：光速变化/光速c=(2.6+-1.7)x10^-15
评价：
1，地表无地球自转以太风。
2，能拖不能转的以太理论站不住脚了。
3,现代MM试验测不出以太风，但是激光陀螺测出了以太风。以太理论需要进化了
该实验及论文属于主流。发表于2003年。可在主流文献及网站找到原文。
该实验不是异军突起。在此实验前有过类似实验。该实验是最近的，且精度最高。
近代关于以太的著名实验：
- 1955> - R. S. Shankland>, S. W. McCuskey>, F. C. Leone>, and G. Kuerti> performed an analysis of Miller's results and explained them as stemming from systematic errors (Shankland's explanation is now widely accepted).
- 1958> - Cedarholm, Havens, and Townes use two masers> frequency locked to each other and send the light in two directions. They receive the null result. The experiment is not as accurate as earlier light-based MMX experiments, but demonstrates a novel setup that would become much more accurate in the future.
- 1964> Jaseja, Javan, Murray and Townes repeat the earlier experiment with newer and much more accurate masers.
- 1969> - Shamir and Fox repeat the MMX experiment with the "arms" in acrylic glass> waveguides and a highly stable laser> as the source. The experiment should detect a shift as small as ~0.00003 of a fringe, and none is measured.
- 1972> - R. S. Shankland admits he would not likely have given the effort to question Dayton Miller's work had it not been for Albert Einstein's "interest and encouragement."
- 1973> - Trimmer finds a null result in a triangular interferometer with one leg in glass.
- 1977> - Brecher repeates Zurhellen's experiment with binary pulsars, showing no difference in light speed to 2*10-9
- 1979> Brillet and Hall use the Townes setup with highly accurate lasers, demonstrating no drift to 3 parts in 1015. Interestingly the experiment also demonstrates a leftover 17 Hz signal, but the authors assume it is linked to the laboratory.
- 1984> - Torr and Kolen find a cyclic phase shift between two atomic clocks>, but the distance between is relatively short (0.5 km) and their clocks of the less-precise rubidium type
- 1988> - Gagnon et al. measure one way light speed and detect no anisotropy
- 1990> - Hils and Hall repeat the Kennedy-Thorndike experiment with lasers, taking measurements over the period of a year. They find no shifting in 2 10-13
- Krisher et al., Phys. Rev. D, 42, No. 2, pp. 731-734, (1990) use two hydrogen masers fixed to the earth and separated by a 21 km fiber-optic link to look for variations in the phase between them. They put an upper limit on the one-way linear anisotropy of 100 m/s.
- 1991> - Over a six-month period, Roland DeWitte finds, over a 1.5 km underground coaxial cable>, a cyclic component in the phase drift between higher-precision cesium-beam clocks on more-or-less the same meridian>; the period equals the sidereal day>
- 2003> - Holger Mueller and Achim Peters carry out a Modern Michelson-Morley Experiment using Cryogenic Optical Resonators at Humboldt University, Berlin. They find no shifting in 10-15