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Rubidium Titanyl Phosphate (RTiOPO4 or RTP)

Physical properties:

Crystal Structure

Orthorhombic,

Lattice Parameters

a = 12.96 A, b = 10.56 A, c = 6.49A

Density

3.6 g/cm3

Melting Point

~ 1000 C

Ferroelectric  transition temperature

~810C

Mohs Hardness

~5

Thermal Expansion Coefficients,/C

a1=1.01x10^-5, a2=1.37x10^-5, a3=-4.17x10^-6

Hygroscopic Susceptibility

No

Dielectric Constant

Eeff = 13.0,

Color

Colorless

Ionic conductivity
(room temperature, 10kHz)

10^-8 S/cm

Optical properties:

Transmitting range:

350~4500 nm

Sellmeier equations:

Ni^2=Ai+Bi[1-(Ci/λ)^2]-Diλ^2

index

A

B

C

D

Nx

2.15559

0.93307

0.20994

0.01452

Ny

2.38494

0.73603

0.23891

0.01583

Nz

2.27723

1.11030

0.23454

0.01995

Absorption coefficient:

< 0.05 % / cm @ 1064 nm < 4 % /cm @ 532 nm

Specifications:

Dimension tolerance:

0.1mm

Flatness:

<l/8 @633nm

Surface quality: Scratch/Dig

10/5

Parallelism:

better than 30 arc sec.

Perpendicularity:

better than 30 arc min

Angle tolerance:

q < 0.5,f < 0.5

AR coating:

AR coatings

Clear aperture:

>90% central area

Transmitting wave front distortion:

less than l/8 @ 633nm

   

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