CLAD OPTICAL FIBER LASER LIGHT SOURCE USING LONG PERIOD FIBER GRATING

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The present invention refers to long period optical fiber grating pair relates to laser clad optical fibers using, more specifically long period optical fiber grating through a pair of clad mode and core mode coupled wide cross-sectional area compared to core project process amplification medium by using a fifth laser beam plural masking dots of that is capable of generating long period optical fiber grating pair using relates to laser clad optical fibers. The present invention according to long period optical fiber grating pair using laser clad optical fibers, core and, internal a rare earth that is concentric with the core is the added values of said is clad and a surrounds the rotor core, said core core between cladding mode mode and phase matching condition core in a predetermined wavelength to have been bonded to one another cladding mode mode and is formed on said core arranged in series long period fiber grating with the optical fiber having a configured includes pairs of, said pump light to irradiate the in cladin cladwith pumping illuminant optically coupled thereto, said signal light to resonator is disposed in each pair of outer long period optical fiber grating including a resonant reflector characterized in that.