Grown in France,
Manufactured in France, Sold Worldwide
RTP Q-switch

RTP Q-switch

RTP (Rubidium Titanyl Phosphate - RbTiOPO4), used as Pockels cells, is a very desirable crystal material for electro­optic modulators and Q-switches.
These are biaxial crystals and natural birefringence needs to be compensated by use of two crystal rods specially oriented so that beam passes along the X-direction or Y-direction.
Input beam is polarized along the diagonal of the input face and Z and Y axis for X-cut crystals (respectively Z and X faces for Y-cut crystals) are perpendicular to the two side faces. Y and Z faces for X-cut crystals (respectively X and Z for Y-cut crystals) are rotated by 90° in the second crystal for thermal compensation.
The ‘o’ ray in the first crystal becomes the ‘e’ ray in the second crystal and vice versa, so that the thermal birefringence is compensated. Matched pairs (equal lengths polished together) are required for effective compensation.

Freedom from piezoelectric ringing enables the use of RTP devices in high repetition rate mode locked laser pulse extraction, laser pulse slicing, chopping and gating systems as well as in Q­switching applications.
Because RTP crystals are not hygroscopic, in an appropriately clean, dust­free, enclosure, all devices within the series can be used without protective windows.
  RTP Q-switch