COMPACT RING erbium fiber laser mode locking BASED fibers with high nonlinearity

摘要

The invention relates to lasers, and more particularly to fiber lasers generating optical radiation at a wavelength of 1.58 microns as ultrashort light pulses with high peak power. Lasers of this type have a high energy laser pulse that is necessary in many applications of laser technology, for example, such as material processing, data transmission, and for medical applications. The technical result consists in obtaining power characteristics and pulse energy emanating from the laser, considerably exceeding the similar characteristics of the prototype device. Said technical result is achieved in that the annular erbium-doped fiber laser with synchronization radiation modes comprises a total normal dispersion laser pumping diode and the fiber ring resonator close to zero, and consists of a spectrally selective fiber coupler optical radiation, the pump input is connected to the output of the laser diode pump source , a signal input coupled to fiber optic light splitter, and the output module connected to the active fiber doped th erbium ions, with normal dispersion. Another end of the active fiber connected to fiber with normal dispersion, connected to the controller of the optical polarization of the radiation, which is connected to the insulator-polarizer optical radiation coupled, in turn, with a second controller of polarization of the radiation, which is connected to fiber with anomalous dispersion, and step refractive index profile, whose output is connected to a fiber optic coupler radiation. Thus as the optical fiber with normal dispersion optical fiber used vysokonelineynyh with step refractive index profile. Applied vysokonelineynyh optical fiber with a step index profile to compensate for total dispersion of the second and third-order resonator, increase energy and peak power pulses in the laser output due to an effective selection of ultrashort pulses smaller in comparison with the prototype the length of the resonator, and thus achieve compactness proposed device. As the tunable filter ultrashort pulses used compact polarizer-isolator optical radiation and two radiation polarization controller installed on both sides of said compact polarizer-isolator. 1 yl.