论文标题
从近距离波长红外的频率分辨光学门控的频率的际带宽阶段匹配
Decadal bandwidth phase matching for frequency resolved optical gating from the near to the long wavelength infrared
论文作者
论文摘要
超快速激光脉冲使对极端非线性过程的研究成为可能。但是，其中许多实验需要对电场进行全面表征，这通常需要单独的参数光学过程。随着新来源的中央波长范围的增加，对适合表征这些不同波长的非线性晶体的需求也会增加。 Here we report on the use of polycrystalline Zinc Selenide as a universal nonlinear crystal in the frequency resolved optical gating characterization technique from the near to long-wavelength infrared, capable of phase matching second-harmonic generation and sum-frequency generation over a decade of bandwidth, as well as ultra-broadband pulses, all of which being crystal orientation and input polarization independent.由于大多数超快速激光源都在这一波长中，因此这项工作表明了在中部到长波长红外的超快速脉冲表征的一种极为简化的方法。
Ultra-fast laser pulses have made possible the study of extreme nonlinear processes. Many of these experiments however require a full characterization of the electric field, which typically requires a separate parametric optical process. As the central wavelength range of new sources continues to increase so too does the need for nonlinear crystals suited for characterizing these differing wavelengths. Here we report on the use of polycrystalline Zinc Selenide as a universal nonlinear crystal in the frequency resolved optical gating characterization technique from the near to long-wavelength infrared, capable of phase matching second-harmonic generation and sum-frequency generation over a decade of bandwidth, as well as ultra-broadband pulses, all of which being crystal orientation and input polarization independent. With the majority of ultra-fast laser sources being in this span of wavelengths, this work demonstrates a greatly simplified approach towards ultra-fast pulse characterization in the mid to long-wavelength infrared.
