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RTP - Rubidium Titanyl Phosphate
Keyword：
RTP - Rubidium Titanyl Phosphate
Category：
- Description
- Cas'Tech Class
- Parameters
-
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
Key words:- Electro-optical RTP crystal
- Isomorph
- high resistivity
- piezo-electric effect
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