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Summary

Many techniques have been developed for the generation of laser pulses over a wide range of pulsewidths from the order of milliseconds to femtoseconds. The generation of a laser pulse is inherently a nonlinear optical process because all of the techniques utilize some form of optical nonlinearity that is coupled to the dynamics of a laser. In this chapter, the basic concepts of the primary techniques for the generation of laser pulses are covered, including gain switching, active and passive Q switching, active and passive mode locking, and synchronous pumping.

A Nd:YAG laser oscillator Q-switched and mode locked via a nonlinear mirror based on stimulated Brillouin scattering (SBS) and aided by an acousto optical modulator (AOM) has been realised. A rate equation model and a round trip model are used to describe the longitudinal mode dynamics. Parameter variations of the nonlinear SBS mirror and the loss modulating AOM in the resonator are investigated with regard to their effect on the pulse duration and spectra of the pulses.

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17 - Generation of Laser Pulses

Summary

Investigation of the impact of SBS-parameters and loss modulation on the mode locking of an SBS-laser oscillator

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17 - Generation of Laser Pulses

Summary

Investigation of the impact of SBS-parameters and loss modulation on the mode locking of an SBS-laser oscillator