SUPER HIGH FREQUENCY MODULATION LASER RAY GENERATOR HAVING DOUBLE ANNULAR RESONATOR STRUCTURE

摘要

PURPOSE: A super high frequency modulation laser beam generator having a double annular resonator structure is provided to widen a range of modulation frequency of laser ray source by changing a polarization and a wavelength of specific modes of laser ray. CONSTITUTION: A first annular optic fiber laser(50) resonator has a length different from a second annular optic fiber laser resonator(60). An optic fiber coupler(70) couples the first annular optic fiber laser resonator with the second annular optic fiber laser resonator to oscillate double laser modes, so that a beat phenomenon between double laser modes is induced. Each of the first and second annular optic fiber laser resonators has a polarization regulator for modulating a frequency of output rays. The first annular optic fiber laser resonator comprises an optic fiber(51) for amplifying rays, a dispersal compensating fiber(52) for a non-linear polarization effect, an optic direction regulator(53) and a polarization regulator(54). The second annular optic fiber laser resonator comprises a dispersal compensating fiber(62) and a polarization regulator(61).