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RTP - Rubidium Titanyl Phosphate

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RTP - Rubidium Titanyl Phosphate
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  • RTP - Rubidium Titanyl Phosphate

  • RTP, applied in nonlinear and E-O devices, features high damage threshold/resistivity, broad IR/Vis band (350 nm-4500 nm) and no induced piezo-electric effect with electrical signal up to 60 kHz.
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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 mm 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

 

 

 

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