Compression of Mode-Locked Nd: YAG Pulses to 1.8 Picoseconds
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In this paper we report the compression of 80 picosecond long mode-locked Nd:YAG pulses to 1.8 picoseconds by using self-phase modulation in single-mode optical fibers and a grating pair dispersive delay line. Although we generated pulses as short as 1.0 picoseconds, pulsewidths of 1.8 picoseconds were more routinely obtained. Our compressor incorporated a novel grazing incidence delay line which greatly reduced the grating separation. We achieved pulse compression ratios of 45:1 and generated visible picosecond pulses by second harmonic generation. For fixed wavelength applications the compressed cw mode-locked Nd:YAG laser provides a completely solid state source of picosecond pulses. In addition, the compressed pulses should improve the performance of synchronously pumped tunable lasers.
KeywordsStimulate Raman Scattering Grazing Incidence Group Velocity Dispersion Picosecond Pulse Gaussian Pulse Shape
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- 6.E.B. Treacy, IEEE J. Quant. Elect., QE-5, 454 (1969)Google Scholar