Crystal Structure

Trigonal, space group R 3c

Cell Parameters

a = 0.515, c = 13.863, Z = 6

Melting Point

1255 +/-5℃

Curie Point

1140 +/-5℃

Mohs Hardness

5

Density

4.64 g/cm 3

Absorption Coefficient

~ 0.1%/cm @ 1064 nm

Solubility:

insoluble in H 2 O

Relative Dielectric Constant

e T11/e 0 : 85
e T33/e 0 : 29.5

Thermal Expansion Coefficients at 25℃

||a, 2.0 x 10 -6 /K @ 25℃
||c, 2.2 x 10 -6 /K @ 25℃

Thermal Conductivity

38 W /m /K @ 25℃

Transparency Range

420 - 5200 nm

Refractive Indices

n e = 2.146, n o = 2.220 @ 1300 nm
n e = 2.156, n o = 2.322 @ 1064 nm
n e = 2.203, n o = 2.286 @ 632.8 m

Optical Homogeneity

~ 5 x 10 -5 /cm

Sellmeier Equations( l in m m)

n o 2 ( l ) = 4.9048+0.11768/(l2- 0.04750) - 0.027169l2
n e 2 ( l) = 4.5820+0.099169/( l2 - 0.04443) - 0.021950 l2

NLO Coefficients

d 33 = 34.4 pm/V
d 31 = d 15 = 5.95 pm/V
d 22 = 3.07 pm/V

Electro-Optic Coefficients

g T 33 = 32 pm/V, g S 33 = 31 pm/V
g T 31 = 10 pm/V, g S 31 = 8.6 pm/V
g T 22 = 6.8 pm/V, g S 22 = 3.4 pm/V,

Half-Wave Voltage, DC
Electrical field ||z, light ^ z
Electrical field ||x or y, light || z

3.03 KV
4.02 KV

Damage Threshold

200 MW/cm 2 (10 ns)

Efficiency NLO Coefficients

d eff =5.7pm/V or~14.6xd 36 (KDP) for frequency doubling 1300 nm;
d eff =5.3pm/V or~13.6xd 36 (KDP) for OPO pumped at 1300nm;
d eff =17.6pm/V or~45xd 36 (KDP) for quasi-phase-matched structure;

Diameter :

max. 25mm

Length:

max. 30mm

Surface Quality:

better than 20/10 scratch/dig Per MIL-0-13830A

Beam Deviation:

<3 arc min

Optical Axis Orientation:

+/-0.2°

Flatness:

< l /4 @633nm

Transimission Wavfront Distortion:

<l /2 @633nm

Coating:

upon customer's Specification