Matsubara Eiichi, Kawamoto Yuta, Sekikawa Taro, Yamashita Mikio
Department of Applied Physics, Graduate School of Engineering, Hokkaido University, Japan.
Opt Lett. 2009 Jun 15;34(12):1837-9. doi: 10.1364/ol.34.001837.
We demonstrated Fourier synthesis of a new type of multiple coherent anti-Stokes Raman scatterings in KTaO(3) crystal. The signals with a wavelength range of 500-750 nm were generated by two femtosecond pulses whose frequency difference was set to be a two-phonon Raman frequency. Angle dispersion of the signals was compensated into one white-continuum beam by spherical mirrors and a prism. The spectral phase, measured by spectral phase interferometry for direct electric-field reconstruction, was compensated for by carefully aligning the angle and the position of the optical components so that 13 fs isolated pulses were generated. This result shows the robustness of our scheme to produce ultrashort optical pulses.
我们展示了在钽酸钾（KTaO₃）晶体中新型多相干反斯托克斯拉曼散射的傅里叶合成。波长范围为500 - 750 nm的信号由两个飞秒脉冲产生，其频率差设置为双声子拉曼频率。信号的角度色散通过球面镜和棱镜补偿为一束白色连续光束。通过用于直接电场重建的光谱相位干涉测量法测量的光谱相位，通过仔细调整光学元件的角度和位置进行补偿，从而产生了13飞秒的孤立脉冲。该结果表明了我们产生超短光脉冲方案的稳健性。
