Introduction
The new crystal RTP is an isomorph of KTP. However, it has higher damage threshold (about 1.8 times KTP), higher resistivity, and no sign of electro- chromism.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. The Q-switch is built using two RTP elements in a temperature compensating design. Input beam is polarized along the diagonal of the input face and Z and Y axis are perpendicular to the two side faces. Y and Z faces 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.

The effective E-O constant r c1 (light propagating along the Y axis) is 23.6 pm/V and E-O constant r c2 (light propagating along the X axis) is 20.3 pm/V. The contrast ratio is better for r c2 constant. At repetition rates of 50KHz, the noise due to piezo-electric ringing is less than 3% while that in BBO it is 10% when operated at 30KHz.

an excellent crystal for Electro Optical applications at high repetition rate.

High Damage Threshold

No Piezoelectric Ringing

Low Insertion Loss

Thermal Compensating Design

Non-hygroscopic

Not induce piezo-electric effect .

Physical and Chemical Properties:

Please view E-O crysals physical Properities (dpf format)

The Sellmeier equations (l in µm ):

n_x²=2.15559+0.93307l ²/(l ²-0.20994²)-0.01452l ²
n_y²=2.38494+0.73603l ²/(l ²-0.23891²)-0.01583l ²
n_z²=2.27723+1.11030l ²/(l ²-0.23454²)-0.01995l ²

Optical and Spectral Properties:

Please view E-O crysals optical and electric-optical Properities (dpf format)

Standard Specifications:

Standard Products