Optical Fiber Oscillator-Amplifier with Increased Pulse Power

We propose an innovative approach to increasing the optical power available from optical fiber lasers. The approach uses a novel fiber design that sharply discriminates against long wavelengths. We can engineer this wavelength cutoff to eliminateparasitic nonlinearities that limit the useful peak power from fiber. We will build a demonstration system utilizing this approach to increase the power from a fiber in a pulsed format. We will deliver the demonstration unit to the Air Force. The goalis a peak power of over 1 kW at a wavelength of 1 micron.