摘要 : We have investigated how the temporal profile and spectral content of the short pulse circulating in the cavity of an actively mode-locked laser are influenced by the injection of an external monochromatic signal. We have solved t... 展开 We have investigated how the temporal profile and spectral content of the short pulse circulating in the cavity of an actively mode-locked laser are influenced by the injection of an external monochromatic signal. We have solved the coupled-mode equations using an iterative approach. When the frequency of the injected signal is tuned to the center of the gain line, the pulse can be stretched. Our analysis predicts that the duration of the short pulse can be reduced by up to 40% when the frequency of the injected signal is detuned from the center of the gain line and when its intensity is adjusted to a proper level. At larger detunings, a periodic beat signal can be generated due to the splitting of the laser spectrum into two components. (C) 1997 Published by Elsevier Science B.V. [References: 9] 收起