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![[ Castech ]<Br>RTP - Rubidium Titanyl Phosphate<br>Nonlinear Crystal](/thum_img/mjct/goods_img3/b43dee8afdfc0525bf0235d9146f0c42_water_4de0b559c44a49f5f544fca08f3bc282_c0_w300_h300.jpg)
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Introduction
Rubidium Titanyl Phosphate (RbTiOPO4 or RTP) is an isomorph of KTP crystal which is used in nonlinear and Electro-Optical applications. It has advantages of 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 |
