Accurate pulse shaping of femtosecond optical pulses is obtained using a 128-pixel liquid crystal spatial light modulator, which manipulates the spectral phase of the optical frequency components in a Fourier-transformed plane. The spectral phase shifts produced by the modulator can be programmed using a simulated annealing optimization code so as to obtain the desired pulse shapes. Significant improvement in the pulse shaping accuracy is achieved by increasing the number of gray levels in the spectral phase mask to 128. Several examples of pulse shaping operation, including high-repetition-rate pulse trains and asymmetric pulse trains, are described.
|ジャーナル||Japanese Journal of Applied Physics, Part 2: Letters|
|号||11 PART A|
|出版ステータス||Published - 1996 11月 1|
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