mode-locked laser
A @L03459@ in which many resonant modes are coupled in phase, to yield a train of very short pulses (e.g. ps pulses). The @C01025@ of the modes is obtained by modulation of the gain in the resonator, and can be active (electro-optic modulation of the losses or of the pump intensity), or passive (with a saturable @A00034@).
See also:
free-running laser
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2254 [Terms] [Paper]