Description
Introduction
Rubidium Titanyl Phosphate (RbTiOPO4 or RTP) is an isomorph of KTP crystal which is used in nonlinear and Electro-Optical applications. It has the advantages of a high damage threshold (about 1.8 times of KTP), high resistivity, high repetition rate, no hygroscopy, and no induced piezo-electric effect with electrical signals up to 60 kHz. Its transmission range is 350 nm to 4500 nm.
| Table 1. Basic Properties | |
| Crystal Structure | Orthorhombic |
| Lattice Parameter | a = 12.96 Å, b = 10.56 Å, c = 6.49 Å |
| Melting Point | About 1000 ℃ |
| Mohs Hardness | about 5 Mohs |
| Density | 3.6 g/cm3 |
| Thermal Expansion Coefficients | αx = 1.01 × 10-5 /K, αy = 1.37 × 10-5 /K, αz = – 4.17 × 10-6 /K |
| Sellmeier Equations (λ in μm) | nx2 = 2.15559 + 0.93307 [1 – (0.20994 / λ)2] – 0.01452 λ2
ny2 = 2.38494 + 0.73603 [1 – (0.23891 / λ)2] – 0.01583 λ2 nz2 = 2.27723 + 1.11030 [1 – (0.23454 / λ)2] – 0.01995 λ2 |
| Therm-optical Coefficient | dλ/dT = – 0.029 nm /℃ |
| Electro-optic Constants
(Y-cut) (X-cut) |
r33 = 38.5 pm/V r33 = 35 pm/V, r23 = 12.5 pm/V, r13 = 10.6 pm/V |
| Electrical Resistivity | about 1011-1012 ohm·cm |
| Static Half Wave Voltage at 1064 nm | 4 × 4 × 20 mm: 1,600 V
6 × 6 × 20 mm: 2,400 V 9 × 9 × 20 mm: 3,600 V |
| Extinction Ratio | > 20 dB @633 nm |
| Table 2. Specifications | |
| Growing Orientation | Along Y-axis |
| Maximum Length (5×5 mm2 aperture) | 25 mm |
| Length Tolerance | + 0.5/- 0.1 mm |
| Surface Quality (Scratch/Dig) | 20/10 to MIL-PRF-13830B |
| Flatness | λ/6 @633 nm |
| Parallelism | 20 arc sec |
| Perpendicularity | ≦15 arc min |
| Angle Tolerance | ≦0.5 ° |
| Coating | AR-coatings |
| Quality Warranty Period | One year under proper use |
