Proper vibrations, cavity

As a rule, the distortion of the water lattice that is found in water without a solute (1) can easily take place in cooperation with the accompanying cation except in the cases of potassium, rubidium, and cesium. These ions are large enough to fill the cavities of the water lattice and to attenuate the lattice vibrations, thus preventing a local collapse of the structure and an increase in the number of interstitial water molecules. The normal water structure is essentially retained, and the lattice, stabilized by cations of the proper size, rejects the complex nonfitting ion (2). 

The linewidth of the single-mode laser is determined by fluctuations in the optical path length of the resonator. These fluctuations are caused primarily by mechanieal instabilities of the optical moimts, and by temperatiue variations of the color center crystal. The mechanical structirre of the laser cavity is perturbed by floor vibrations and acoustics, both of which can be minimized with proper... 

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