RTP Orthorhombic Crystal Examples KTP Rubidium Titanyle Phosphate RbTiOPO4
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RTP
- RTP (Rubidium Titanyle Phosphate – RbTiOPO4) 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 hygroscopic and no induced piezo-electric effect with electrical signals up to 60 kHz. Its transmission range is 350nm to 4500nm.
Basic Properties:
| Crystal Structure | Orthorhombic |
| Cell Parameters | a = 12.96 Å,b =10.56 Å, c =6.49 Å |
| Mohs Hardness | About 5 |
| Density (g/cm3) | 3.6 |
| Melting Point | About 1000℃ |
| Thermal Expansion Coefficients (/K) | αx=1.01x10-5, α y =1.37x10-5 αz =-4.17x10-6 |
| Sellmeier Equations (λ in μm) |
nx2=2.15559 + 0.93307[1-(0.20994/λ)2] - 0.01452λ2 ny2=2.38494 + 0.73603[1-(0.23891/λ)2] - 0.01583 λ2 nz2=2.27723 + 1.11030[1-(0.23454/λ)2] - 0.01995λ2 |
| Thermal-optical Coefficients (dλ/dT) | -0.029 nm /℃ |
| Electro-optical Conatants (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 1011-1012ohm·cm |
| Static Half Wave Voltage at 1064 nm |
4x4x20 mm: 1,600 V 6x6x20 mm: 2,400 V |
| Extinction Ratio | >20dB@633nm |
Specifications:
| Growing Orientation | Along Y axis |
| Maximum Length (5x5mm2 aperture) | 25mm |
| Length Tolerance (mm) | +0.5/-0.1 |
| Width and Height Tolerance (mm) | ±0.1 |
| Parallelism | ＜30″ |
| Perpendicularity | ＜15′ |
| Surface Quality | 20/10 |
| Coating | AR-coatings |
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