Abstract
Frequency-modulated (FM) dye lasers have been developed for use in optical frequency metrology.1,2 In this scheme a wide-bandwidth FM dye laser provides a comb of equally spaced modes. Laser frequencies separated by several hundreds of gigahertz can be compared by heterodyning methods by counting beat frequencies less than the FM laser mode spacing (<100 MHz).
© 1986 Optical Society of America
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