|
Newlight's RTP features
|
Large electro-optic coefficients |
|
Large nonlinear optical coefficients |
|
No
piezoelectric ringing to the MHz range |
|
Low operating voltage for Q-Switch |
|
Low ionic conductivity |
|
Nonhygroscopic,
chemically and mechanically stable |
|
High damage threshold |
RTP
is a positive biaxial crystal, with the principal axes X, Y, and Z ( nz>ny>nx
) parallel to the crystallographic axes a, b, and c, respectively.
Structural
and Physical Properties
|
Crystal
Structure |
Orthorhombic. Point group mm2 |
|
Cell Parameters |
a=12.96Å, b=10.56Å, c=6.49 Å,
Z=8
|
|
Melting
Point |
1000
oC
|
|
Curie Point |
810
oC
|
|
Mohs Hardness |
~ 5
|
|
Density |
3.6 g/cm3
|
|
Color |
colorless
|
|
Hygroscopic
Susceptibility
|
No
|
|
Thermal Expansion |
α1=1.01x10-5,
α2=1.37x10-5,
α3=-4.17x10-6 |
|
Dielectric constant |
εeff=13
|
|
Ionic conductivity
|
~10-8 s/cm
(c-axis, @25 oC, 10kHz)
|
Linear
Optical Properties:
|
Transmitting
Range: |
350 nm - 4500 nm |
|
Refractive
Indices:
1064nm
532nm |
nx ny nz
1.7673 1.7760 1.8574
1.8098 1.8227 1.9310 |
|
Sellmeier Equations:
(λ in µm) |
nx2=2.1556+0.93307λ2/(λ2-0.20994)-0.01452λ2
ny2=2.3849+0.073603λ2/(λ2-0.23891)-0.01583λ2
nz2=2.27723+1.11030λ2/(λ2-0.23454)-0.01995λ2 |
|
Thermo-optic
Coefficients: |
dnx/dT=
- /oC, dny/dT=
- /oC
dnz/dT= - /oC
( N/A) |
|
Absorption
Coefficient: |
α<0.05% cm-1 @1064nm,
α<4% cm-1 @532nm
|
Electro-Optical and Nonlinear Optical
Properties:
Electro-optic Coefficients
( x-cut, low frequency ) |
γ13=10.5pm/V,
γ23=12.5pm/V,
γ33=35.0pm/V |
| Half-wave
Voltage@1064nm |
1.6 kV for a
pair of 4x4x10mm crystals |
|
3.4 kV for a pair of
6x6x7mm crystals |
|
2.4 kV for a pair of 6x6x10 mm crystals |
|
Nonlinear Optical Coefficients |
d31=2.0pm/V, d32=3.6pm/V,
d33=8.3pm/V,d24=3.6pm/V,
d15=2.0pm/V |
|
Effective Nonlinearity
|
deff(II)= (d24 - d15)sin2φsin2θ
-(d15sin2φ+ d24cos2φ)sinθ |
|
