| abstract |
A laser ( 12, 18 ) with a laser resonator ( 13 ), the laser resonator ( 13 ) having a non-linear optical loop mirror ( 1, 1 ′), NOLM, which is adapted to guide counter-propagating portions of laser pulses, and to bring the counter-propagating portions of laser pulses into interference with each other at an exit point ( 4 ) of the NOLM ( 1, 1 ′). The non-linear optical loop mirror ( 1, 1 ′) has a non-reciprocal optical element ( 7, 7 ′). |