Theory of passive additive-pulse mode locking.
The laser configuration of newly developed additive-pulse mode locking, also known as coupled-cavity mode locking, can be viewed as an intracavity interferometer. By solving the equation of motion of the two coupled cavities, a mathematical description of the self-starting mechanism is obtained. With this method, the transient pulse evolution of an initial seed pulse can be calculated and thereby optimized. The structure of the equation of motion suggests new single-cavity configurations of additive-pulse mode locking, and the same method of analysis can be applied to them.
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