CRYLINK’s pockels cells use a protective window with a high-quality AR coating, ensuring a high transmission rate and prolonging the device’s service life.
By applying electric field control to the electro-optic crystal, the refractive index of the electro-optic crystal in a specific direction can be changed so that the electro-optic modulator pockels cells can be used as a variable half-wave plate to change the polarization state. When the pockels cells of the electro-optic modulator are placed between two vertical polarizers, the luminous intensity modulation can be realized. The electro-optic effect can be divided into the transverse and longitudinal electro-optic effects. In the transverse electro-optic effect, the propagation direction of light is perpendicular to the electric field, and the propagation direction of light in the longitudinal electro-optic effect is parallel to the electric field.
The half-wave voltage of the longitudinal electro-optic effect is independent of crystal size, so it is challenging to realize high-frequency electro-optic modulation. The working principle of BBO pockels cells is based on the transverse electro-optic effect. The half-wave voltage can be reduced by changing the size of BBO crystal. Crylink can provide BBO pockels cells with different aperture and lengths, adapting to different environments. Due to its low ringing effect and high laser-damaged threshold, the maximum frequency of Crylink’s BBO pockels cells can reach 1MHz.
|Product type||Pockels Cells|
The laser-damaged threshold of the above products is ≤1GW/cm2@1064nm 10ns 10Hz