Double Clad Optical Fiber Having Ring Core Surrounding Core For High Power Operation

摘要: An optical fiber apparatus having a wavelength of operation comprises an comprising core; pump cladding disposed about the core for receiving energy wavelength; and second tending to confine cladding. The can comprise rare earth material providing responsive energy, further at least one ring spaced from core, defined by inner outer diameters cross sectional area therebetween. absorbing operation. At fundamental mode that is primarily higher order (HOM) mixed selected modes being same azimuthal order. be suppressed relative mode.