Patent ID: 9748728
Date: 2017-08-29
CPC Classifications: G02F,H01S

Claim:
1. An optical parametric oscillation laser based on I-type quasi-phase matching, comprising: a femtosecond pulse laser serving as a pump source; an input coupling mirror; an MgO:PPLN crystal; an output coupling mirror; and, a beam splitter prism; wherein, the femtosecond pulse laser, the input coupling mirror, the MgO:PPLN crystal, the output coupling mirror and the beam splitter prism are placed sequentially; a pump light emitted from the femtosecond pulse laser, enters the MgO:PPLN crystal through the input coupling mirror, and forms optical parametric oscillation between the input coupling mirror and the output coupling mirror; a mixed light is then emitted from the output coupling mirror, which is further isolated by the beam splitter prism, and a mid-infrared ultrashort pulse laser is finally obtained, the mixed light includes a signal light, an idler light and a residual pump light; and a temperature-control oven arranged under the MgO:PPLN crystal is applied to regulating the operation temperature of the MgO:PPLN crystal, the signal light and the pump light are propagating in the MgO:PPLN crystal with orthogonal polarizations, and a group velocity mismatch between the signal light and the pump light is eliminated at a regulated operation temperature.