Proceedings PaperMedium Power Nd3+:Glass Fiber Array Laser
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For the first time, continuous, moderate power operation of a Nd3+:glass fiber bundle laser is reported. The disordered fiber bundle laser consisted of 1450 fibers, each 100 pm in diameter, with 75 pm core, phosphate laser glass doped at 8 wt.% Nd203. The laser fiber bundle was energized by a xenon flashlamp or, a cw argon arc lamp. A maximum energy of 0.8 J at 4.9 kW peak power was obtained in the pulsed flashlamp experiments while the maximum cw power of 25 W was obtained with the arc lamp. The loss coefficient of 0.0266 cm-1 was inferred from the data. Neither the pulsed nor the cw systems were optimized. The beam profile was imaged with low spatial resolution and found to be lobed. Beam structure is indicative of coherence. Calculations for a would be ordered fiber array laser show that the beam far field approximates a Fraunhoffer diffraction pattern for the total aperture as the beamlets fill the apperture area.