Ha. Haus et al., STRETCHED-PULSE ADDITIVE-PULSE MODE-LOCKING IN FIBER RING LASERS - THEORY AND EXPERIMENT, IEEE journal of quantum electronics, 31(3), 1995, pp. 591-598
Stretched-pulse additive pulse mode-locking uses segments of fiber of
large positive and large negative group velocity dispersion (GVD) in t
he cavity, The changes in pulse width per pass due to the varying GVD
can be an order of magnitude or more, A theory is developed based on t
he master equation that covers this case of large pulse changes in one
transit, The general predictions of the theory are verified by experi
mental results.