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Temporal and spectral Investigation of Nd:YAG pulse propagation in optical fibers and its application to pulse compression

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Abstract

Nd:YAG pulse compression by the fiber grating-pair technique has become important in obtaining picosecond and subpicosecond pulses at 1.06 μm. To optimize this technique with respect to pulse compression ratio and peak power we made a detailed investigation of Nd:YAG pulse propagation in single-mode libers. The pulse shapes and spectral evolution have been measured for different fiber lengths as a function of input power. From these measurements optimum conditions for pulse compression (fiber length and power) have been derived. In these optimized conditions we obtained 100× compression in a single-stage compressor from 100 to 1 ps, whereas in two stages a 450× compression factor was possible. The peak power enhancement is ~20× in both cases. It rises from 90 W to ~1.8 kW and from 480 W to ~9.6 kW, respectively.

© 1986 Optical Society of America

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