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A mode-locked laser is capable of emitting extremely short pulses on the order of tens of picoseconds down to less than 10 femtoseconds. These pulses will repeat at the round trip time, that is, the time that it takes light to complete one round trip between the mirrors comprising the resonator.
For example, âNormal Phaseâ chromatography has a non-polar mobile phase with a more polar stationary phase. Reversed phase HPLC (as the name implies) uses a system in which the mobile phase is more polar than the stationary phase. The main modes of chromatography and their uses are described in Table 1. Table 1.