Laser systems with CdSe crystal have obvious advantage,such as,much
broader tuning range. In the difference-mixing of the output of
parametric oscillator in CdSe to obtain the phase matched 9.***4.3
μm tuning range. CdSe crystal has its band edge in the near
infrared and shows transmission far into the infrared. The long
wavelength limit determined by the onset of lattice absorption *
*-*@********************here is also a narrow impurity absorption centered at *8.5μm which
varies from one crystal to another. As a nonlinear optical
material, CdSe crystal was explored for OPG, OPO and DFG in ***0’s.
First of all, picoseconds pulses tunable from *0 to *0 μm were
produced. Furthermore, CdSe was also used to achieve megawatt peak
power in the range of ***3 and ***2 μm , based on OPG and OPO
respectively.
