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A high-Q confocal Fabry-Perot microwave resonator for precision spectroscopy of atoms, ions and molecules is described, giving convenient access to the overlap region of interacting species, microwave field and light. Microwave power is coupled with almost 100% efficiency into the interferometer by means of a small copper wire dipole antenna. The concept of an uncomplicated and inexpensive frequency stabilisation of microwave sources through coupling to a Fabry-Perot reference resonator is discussed.
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Harbarth et al. (1987) studied this question.
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