Direct measurements using a picosecond streak camera have shown that transform-limited pulses having durations ∼5 psec are produced throughout the pulse train of a mode-locked neodymium-phosphate glass laser operating in the TEM00 mode. Under the conditions of higher-power multimode operation, bandwidth-limited pulses are generated in the initial part of the train only. Spectral and temporal broadening due to intensity-dependent nonlinear effects are observed as the higher-power mode-locked trains evolve.
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Taylor et al. (1977) studied this question.
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