Improved mode locking of an F-center laser with a nonlinear nonsoliton external cavity.
We demonstrate that solitons are not essential for the operation of the soliton laser. The external cavity employed contains an optical fiber with negative group-delay dispersion and therefore does not support bright solitons. Thus the improved mode locking cannot be attributed to the injection of an N = 2 soliton.
Blow
K J
KJ
Nelson
B P
BP