Single-emitting time self-relative measuring device

The invention discloses a single-emitting time self-relative measuring device. A measured ultrafast laser pulse parallel beam is expanded through a beam expanding collimating mirror, the beam is horizontally in incident on a nonlinear crystal at a symmetric angle after divided into two light beams to the center in a decentration by a double prism, frequency conversion is realized in an overlappingarea of the two light beams in the nonlinear crystal, a self-relative frequency doubling signal is generated, time information is converted to space information, and pulse information is obtained. The single-emitting time self-relative measuring device is compact in structure, optical path and crystal angular adjustment are not required, the cost is low, the nonlinear crystal is only required tobe rotated, and self-relative signal measuring of an incident ultrafast pulse of any polarization states can be realized. 本发明公开了一种单发次自相关测量装置。被测的超快激光脉冲平行光束经过扩束准直镜扩束，被双棱镜向中心偏折分成两光束后以对称角度水平入射到非线性晶体，在非线性晶体内的两光束重叠区域实现频率转换，产生自相关倍频信号