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We have controlled the amount of spatial hole burning in a diode end-pumped Nd:YAG laser to quantitatively analyze its role in active mode locking. We demonstrate inhomogeneous broadening of the lasing bandwidth to >60 GHz, accompanied by a pulse-width reduction from 40 to 15 ps and an ~30% increase in the time-bandwidth product. Both homogeneous and inhomogeneous broadening have been included in a successful calculation of the steady-state pulse width.
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Flood et al. (1995) studied this question.
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