OPTICAL FIBER LASER DEVICE

摘要

PURPOSE:To stabilize the repeating frequency of emitted ultrashort pulse beams by a method wherein a first optical fiber loop and a second optical fiber loop are coupled with each other and then a light modulating means is inserted into the second optical fiber so as to set up the modulation frequency in the value at the integer times of a resonator length. CONSTITUTION:The title optical fiber laser device 41 is composed of a second optical fiber loop 43 wherein a rapid light modulator (light modulating means) is inserted between an optical isolator 16 of a second optical fiber loop 3 of a passive mode synchronous rare earth doped optical film laser 1 and a polarization controller 17. The rapid light modulator 42 is inserted into the optical fiber laser device 41 so as to make the repeating frequency of femto second optical pulse beams constant. The amplified medium corresponding to the wave length is actualized by the various rare earth doped optical fiber 13 and an exciting light source 11 exciting the same. The repeating frequency of the emitted ultrashort pulse beams will be augmented up to the integer times of repetition decided by the length of a resonator to be stabilized thereby.