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RTP crystal (Rubidium Titanyle Phosphate – RbTiOPO4)

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Quick Overview

RTP is widely used for Electro Optical applications whenever low switching voltages are required.


Cristal Laser


Crystal Laser Non-linear Crystals

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Availability: Ships in 15 to 20 Business Days



  • Electro-Optic
    • High damage Threshold (>15J/cm² at 10Hz, 10ns at 1064nm performed on coated crystals of 10mm long)
    • No piezoelectric ringing
    • Low operating voltage (1300V for Y-cut and 1600V for X-cut at 1064nm applied to a crystal pair of 4x4mm² for the aperture and 2x10mm for the length)
    • Low bulk absorption (<250ppm/cm at 1064nm)
    • Non hygroscopic
    • Applications:
      • Used as pulse-picker in femto-second train
      • Used as Q-switch at high repetition rate


Rubidium Titanyle Phosphate – RbTiOPO4

RTP is an isomorph to Potassium Titanyl Phosphate (KTiOPO4, KTP), a highly efficient non-linear crystalline material. RTP single crystals are grown by a slow-cooling flux method. The saturation point at the start of crystal growth is set by using a seed-tentative method. The growth temperature ranges from 800°C to 950°C with a growth period between 45 and 60 days.

RTP crystal appealing because it is not sensitive to moisture, easy to handle and coat, and also it does not exhibit piezo-electric ringing at elevated repetition rate. Moreover, RTP exhibits high electro-optic coefficients that allow the monitoring of Pockels cell with low power voltage requirement.

As RTP is transparent from 0.4 to 3.5µm, it can be used in multiple types of laser such as Er:YAG laser at 2.94µm with fairly good efficiency. Bulk absorption measurements at 1.064µm range from 50 to 150ppm using Photothermal Common Path Interferometer.

RTP has a fairly high surface damage threshold measured by SPICATEC at 15J/cm² (1064nm, 10ns, 10Hz).



Applications Laser Systems
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