| Brief Introduction
SinoSi’s BIBO (BiB3O6) is a newly developed Nonlinear Optical Crystal. It possesses large effective nonlinear coefficient, high damage threshold and is non-hydroscopic. It's nonlinear coefficient is 3.5 - 4 times higher than that of LBO, 1.5 -2 times higher than that of BBO. It can efficiently frequency doubling the 946nm to produce blue laser at 473nm.
Application:
• SHG and THG for middle and high power Nd: lasers at 1064nm
• SHG and THG of high power Nd: lasers at 1342nm & 1319nm for red and blue laser
• SHG for the Nd: Lasers at 914nm & 946nm for blue laser
• Optical Parametric Amplifiers (OPA) and Oscillators (OPO) application
Nonlinear Optical Property Comparison |
|
Properties |
BIBO |
LBO |
BBO |
Length (mm) |
10.4 |
10 |
8 |
Deff (pm/V) |
3.3 |
0.81 |
2.0 |
Walk-Off (mrad) |
40.7 |
11.3 |
60.3 |
Output Power (W) |
2.8 |
1.52 |
2.1 |
Conversion Efficiency |
63% |
33% |
47% |
|
Main Specification |
|
Maximum Size |
20 x 20 x 40 mm |
Diameter Tolerance |
?.1mm |
Length |
+0.5/-0.1mm (L>=2.5mm)
+0.1/-0.1mm (L<2.5mm) |
Coating specification: |
a) AR @ 940nm or HR @940nm
b) AR @ 1053nm or AR @1030nm or HR @1053nm |
Parallelism |
< 20 arc seconds |
Perpendicularity |
< 5 arc minutes |
Angle Tolerance |
q D < n a p s / ? > 3 . 0 n a p s / ? > , f D < n a p s / ? > 3 . 0 n a p s / ? > |
Surface Flatness |
<λ/8 at 632.8nm |
Surface Quality |
10/5 scratch-dig |
Clear aperture |
Central 90% |
Physical and Chemical Properties |
|
Crystal Structure |
Moniclinic, point group 2 |
|
|
lattice Parameters |
a = 7.116 ? b = 4.993? c = 6.508? Z = 105.62?/font> |
|
|
Melting Point (congruent) |
726 癈 |
|
|
Specific Heat |
0.5 J/g-K at 330 K |
|
|
Hardness |
5 ?5.5 Mohs |
|
|
Density |
5.033 g/cm 3 |
|
|
Thermal Expansion Coefficients |
//a, 4.8 x 10 -5 /K , //b, 4.4 x 10 -6 /K, //c, -2.69 x 10 -5 /K |
|
|
Optical Properties |
|
|
|
Transparency Range |
286-2500 nm |
|
|
Refractive Indices
at 1079.5 nm
at 539.75 nm |
n 1 = 1.9166, n 2 = 1.7569, n 3 = 1.7835
n 1 = 1.9260, n 2 = 1.7874, n 3 = 1.8190
|
|
|
Optical homogeneity |
~ 10 -6 /cm |
|
|
NLO coefficients (pm/V) |
d 11 = 2.53, d 12 = d 14 = 2.3, d 13 = -1.3,
d 25 = d 36 = 2.4, d 26 = 2.8
d 35 = -0.9 |
|
|
Sellmeier Equations |
n i 2 ( l ) = A + B/( l 2 -C) )- D l 2
|
A |
B |
C |
D |
n 1 |
3.6545 |
0.0511 |
0.0371 |
0.0226 |
n 2 |
3.0740 |
0.0323 |
0.0316 |
0.01337 |
n 3 |
3.1685 |
0.0373 |
0.0346 |
0.01750 |
|
|
Potassium Titanyl Phosphate ( KTP)
Applications
1.Frequency Doubling (SHG) of Nd-doped Lasers for Green / Red Output.
2.Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Output.
3.Parametric Sources (OPG,OPA and OPO) for 0.6 μ m-4.5 μ m Tunable Output.
4.E-O Modulators , Optical Switches , Directional Couplers.
5.Optical Waveguides for Integrated NLO and E-O Devices.
Basic Properties
1. Structural and Physical Properties
Chemical formula |
KTiOPO4 |
Crystal Structure |
Orthorhombic , Point group mm2 |
Cell Parameters |
a=6.404?,b=10.616 ? ,c=12.814 ? ,z=8 ? |
Melting Point |
1172 ℃ Incongruent |
Curie point |
936 ℃ |
Mohs Hardness |
≈ 5.5 |
Density |
2.945g/cm3 |
Linear Absorption Coefficients |
α <0.001cm-1 @ λ =1064nm or 532nm |
Hygroscopic Susceptibility |
no |
Relative Dielectric Constant |
ε eff=13 |
Specific heat |
0.1643cal/g. ℃ |
Electrical Conductivity |
3.5 × 10 -8s/cm(c-axis,22 ℃ ,1KHz) |
Thermal Conductivity |
13W/m/k |
2. inear Optical Properties
· Refractive Indices
Refractive Indices:
Wavelength n x n y n z
1064 nm 1.7377 1.7453 1.8297
532 nm 1.7780 1.7886 1.8887 |
Therm-Optic Coefficients:
dn x /dT=1.1x10 -5 / o C
dn y /dT=1.3x10 -5 / o C
dn z /dT=1.6x10 -5 / o C |
Sellmeier Equations:
n 2 x =3.0065+0.03901/( l 2 -0.04251)-0.01327 l 2
n 2 y =3.0333+0.04154/( l 2 -0.04547)-0.01408 l 2
n 2 z =3.3134+0.05694/( l 2 -0.05658)-0.01682 l 2 |
3. onLinear Optical Properties
Phase- Matchable Output Range: 492-1700nm
NLO Coefficients: |
d31=2.54pm/v, |
d32=4.35pm/v, |
d33=16.9pm/v, |
d24=3.64pm/v, |
d15=1.91pm/v, |
at 1064nm, |
deff(II) ≈ (d24- d15)sin2 φ sin2 θ -( d15sin2 φ + d24cos2 φ )sin θ |
Electro-Optic Coefficients: |
Low Frequency(pm/V) |
High Frequency(pm/V) |
γ 13 |
9.5 |
8.8 |
γ 23 |
15.7 |
13.8 |
γ 33 |
36.3 |
35.0 |
γ 51 |
7.3 |
6.9 |
γ 42 |
9.3 |
8.8 |
Applications for SHG and SFG of Nd:lasers
KTP is the most commonly used material for frequency doubling of Nd:YAG lasers and other Nd-doped lasers,particularly at the low or medium power density. The following Table lists the major NLO properties of KTP for frequency-doubling of Nd:YAG laser.
PM angle |
Θ =90 ° , Φ =23.5 °
where Θ & Φ are polar angles referring to Z and X. |
Effective SHG coefficient |
d eff ≈ 8.3xd 36 (KDP) |
Angular acceptance |
20mrad-cm |
Temperature acceptance |
25 ℃ -cm |
Spectral acceptance |
5.6 ? -cm. |
Walk-off angle |
4.5mrad(0.26 ° ) |
Optical damage threshold |
≥ 500MW/cm2,(@1.06 μ m,10ns,10Hz) |
Sino Optics 's warranty on KTP specifications:
· Transmitting wavefront distortion: less than λ/4 @633nm
· Dimension tolerance: (W±0.1mm)×(H±0.1mm)×(L+0.2mm/-0.1)
· Clear aperture : >90% central area
· Flatness: λ/8 @633nm
· Surface quality: 10/5 Scratch/Dig
· Parallelism: better than 10 are sec.
· Perpendicularity: 15 arc min.
· Angle tolerance: Δ Θ < ±0.5° , Δ Φ < ±0.5°
· AR coating: dual wave band AR coating at 1064/532 nm for both faces
· Residual reflectivity: <0.2% at 1064 nm and <0.5% at 532 nm per surface
· Quality Warranty Period: one year under proper use
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