RTP
RTP (Rubidium Titanyle Phosphate – RbTiOPO4) is an isomorph of KTP crystal. It is an excellent crystal used in nonlinear and electro-optical applications. Its transmission range is 350nm to 4500nm.
Advantages
1. An excellent crystal for electro-optical applications at high repetition rate;
2. High damage threshold (about 1.8 times of KTP);
3. Low insertion loss;
4. No induce piezoelectric ring effect (up to 60 kHz);
5. Non-hygroscopic;
6. High extinction and contrast ratio;
7. Thermal compensating design.
Basic Propertie
Crystal structure |
Orthorhombic |
Cell Parameters |
a=12.96Å; b =10.56Å; c =6.49Å |
Mohs hardness |
About 5 |
Density (g/cm3) |
3.6 |
Melting Point |
About 1000°C |
Thermal Expansion
Coefficients (/K) |
αx=1.01x10-5, αy =1.37x10-5,
αz=-4..17x10-6 |
Sellmeier equations(λ in um) |
nx2=2.15559+0.93307[1-(0.20994/λ)2]-0.01452λ2
ny2=2.38494+0.73603[1-(0.23891/λ)2]-0.01583λ2
nz2=2.27723+1.11030[1-(0.23454/λ)2]-0.01995λ2 |
Thermo-optical Coefficients |
-0.029 nm / °C |
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 1011-1012ohm·cm |
Static Half Wave Voltage
at 1064 nm |
4x4x20 mm,1600 V
6x6x20 mm, 2400 V
9x9x20 mm, 3600 V |
Extinction Ratio |
>20dB@633nm |
Specification of Sino-crystal's RTP crystal
Dimension tolerance |
W(±0.1)×H（(±0.1)×L(+0.5/-0.1) mm |
Flatness |
λ/8 @633nm |
Surface quality: Scratch/Dig |
10/5（uncoated） |
Parallelism |
better than 20 arc seconds |
Perpendicularity |
better than 0.25° |
Angle tolerance |
Δθ< ±0.3°, Δφ<±0.3° |
AR coating |
R<0.2%@1064nm,R<0.5%@532nm |
Clear aperture |
>90% central area |
Wave-front distortion |
less than λ /8 @ 633nm |
Quality Warranty Period |
one year under proper use |
Applications
- E-O application
- NLO application
- OPA and OPO application
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