The Measurement of Optical Frequencies

Optical Frequency Comb

Figure 1: The temporal behavior of an electromagnetic wave.

Figure 2: A classical fequency chain for measuring optical frequencies.

Figure 3: The NRC classical chain for measuring the optical transition at 445 THz in a single trapped stronium ion.

Figure 7: Schematic diagram of the NRC optical frequency comb. AOM – acousto-optic modulator; IF – interference filter; KTP – frequency doubling crystal

Figure 4: The electical field of a mode-locked laser.

Figure 6: Self-referencing method of determining the value of the offset

frequency, ƒ_o.

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