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Laser mode-locking with saturable absorbers

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2 Author(s)
Garmire, Elsa M. ; California Institute of Technology, Pasadena, CA, USA ; Yariv, A.

In this paper we describe a mode-locked laser in terms of traveling pulses of light. We show that the energy absorbed by a saturable absorber is a minimum if the pulselength is a minimum, and that two pulses are essentially as favorable as one if they meet at the position of the dye cell. Under steady-state pulsing conditions, however, we show that the pulses will have a width which depends on their energy. We find that for parameters appropriate to present Nd: glass experiments, the expected length is about 10-11seconds, in agreement with observations. Finally, we demonstrate the rather surprising result that a linearly dispersive medium does not broaden the mode-locked laser pulses to first order.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:3 ,  Issue: 6 )