Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan.
Opt Lett. 2011 Jul 15;36(14):2611-3. doi: 10.1364/OL.36.002611.
We retrieve the spectral phase of 400 fs pulses at 1560 nm with 5.2 aJ coupled pulse energy (40 photons) by the modified interferometric field autocorrelation method, using a pulse shaper and a 5 cm long periodically poled lithium niobate waveguide. The carrier-envelope phase control of the shaper can reduce the fringe density of the interferometric trace and permits longer lock-in time constants, achieving a sensitivity of 2.7×10(-9) mW(2) (40 times better than the previous record for self-referenced nonlinear pulse measurement). The high stability of the pulse shaper allows for accurate and reproducible measurements of complicated spectral phases.
我们使用脉冲整形器和 5 厘米长的周期性极化铌酸锂波导，通过改进的干涉场自相关方法，以 5.2aJ 耦合脉冲能量（40 个光子），在 1560nm 处检索到 400fs 脉冲的光谱相位。整形器的载波包络相位控制可以降低干涉迹线的条纹密度，并允许更长的锁定时间常数，从而实现 2.7×10(-9) mW(2)的灵敏度（比以前的自参考非线性脉冲测量记录好 40 倍）。脉冲整形器的高稳定性允许对复杂的光谱相位进行准确和可重复的测量。
