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Lithium Niobate(LiNbO3) Crystal
is widely used as frequency doublers for wavelength > 1 mm and
optical parametric oscillators (OPOs) pumped at 1064 nm as well as
quasi-phase-matched (QPM) devices. Due to its large Electro-Optic
(E-O) and Acousto-Optic (A-O) coefficients.
Red Optronics supplies high quality and large size
LiNbO3 crystals for laser
frequency doublers, OPOs and quasi-phase-matched doublers, as well as
waveguide substrate and SAW wafers. High quality LiNbO3
finished components with aperture of (2 - 15) x (2 - 15) mm2 and length
up to 50 mm for frequency doublers and optical parametric oscillators (OPOs),
50x50x1 mm3 or Dia. 3" x 1 mm LiNbO3 substrate for waveguide
optics, and Dia. 3" SAW wafers are available with high volume and
at low price.
Physical and
optical properties:
| Crystal
Structure |
Trigonal,
space group R3c |
| Cell
Parameters |
a = 0.515,
c = 13.863, Z = 6 |
| Melting
Point |
1255
+/-5°C |
| Curie
Point |
1140
+/-5°C |
| Mohs
Hardness |
5 |
| Density |
4.64
g/cm3 |
| Absorption
Coefficient |
~ 0.1%/cm
@ 1064 nm |
| Solubility: |
insoluble
in H2O |
| Relative
Dielectric Constant |
eT11/e0: 85
eT33/e0: 29.5 |
| Thermal
Expansion Coefficients at 25°C |
||a, 2.0 x
10-6/K @ 25°C
||c, 2.2 x
10-6/K @ 25°C |
| Thermal
Conductivity |
38 W /m /K
@ 25°C |
| Transparency Range |
420 - 5200
nm |
| Refractive
Indices |
ne = 2.146,
no = 2.220 @ 1300 nm
ne = 2.156,
no = 2.322 @ 1064 nm
ne = 2.203,
no = 2.286 @ 632.8 m |
| Optical
Homogeneity |
~ 5 x
10-5 /cm |
Sellmeier
Equations
(l
in mm) |
no2(l) =
4.9048+0.11768/(ll2 - 0.04750) - 0.027169
l2
ne2(l) =
4.5820+0.099169/(l2- 0.04443) - 0.021950
l2 |
| NLO
Coefficients |
d33 = 34.4
pm/V
d31 = d15 = 5.95
pm/V
d22 = 3.07 pm/V |
| Electro-Optic
Coefficients |
gT33 = 32 pm/V,
gS33 = 31
pm/V
gT31 = 10 pm/V, gS31 = 8.6
pm/V
gT22 = 6.8 pm/V, gS22 = 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/cm2 (10
ns) |
| Efficiency NLO Coefficients |
deff=5.7pm/V or~14.6xd36(KDP)
for frequency doubling 1300 nm;
deff=5.3pm/V or~13.6xd36(KDP) for OPO pumped
at 1300nm;
deff=17.6pm/V or~45xd36(KDP) for
quasi-phase-matched structure; |
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