Magnesium Oxide doped Lithium Niobate (MgO:LiNbO3)
Material
MgO:LiNbO3
Magnesium Oxide doped Lithium Niobate (MgO:LiNbO3) possesses a combination of excellent electro-optical and non-linear optical properties (transparency in 0.4 – 5 µm spectral range, high nonlinear optical coefficient and laser radiation resistance) with exhibiting mechanical and chemical stability. It has similar effective nonlinear coefficients, optical and physical properties as pure LiNbO3.
The damage threshold of MgO:LiNbO3 is much higher than that of pure LiNbO3 single crystals (> 200MW/cm2 (@ 1064nm, 10ns for pure LiNbO3 and >300MW/cm2 @ 1064 nm, 12ns for MgO:LiNbO3), because the doping of monocrystals with MgO in the range of 4 to 7 mol% suppresses the photorefractive damage. MgO:LiNbO3 is characterized by noncritical phase matching (NCPM) at room temperature and can achieved angle tuning SHG of Nd:YAG and Nd:YLF laser. MgO:LiNbO3 is commonly used for electro-optical modulation (EOM Q-switches), high power frequency doublers (SHG), mixers (SFG), optical parametric oscillators (OPO) and amplinbo3iers (OPA) and integrated waveguides. MgO:LiNbO3 possesses a combination of excellent electro-optical and non-linear optical properties (transparency in 0.4 – 5 µm spectral range, high nonlinear optical coefficient and laser radiation resistance) with exhibiting mechanical and chemical stability. It has similar effective nonlinear coefficients, optical and physical properties as pure LiNbO3.
The damage threshold of MgO:LiNbO3 is much higher than that of pure LiNbO3 single crystals (> 200MW/cm² (@ 1064nm, 10ns for pure LiNbO3 and >300MW/cm² @ 1064nm, 12ns for MgO:LiNbO3), because the doping of monocrystals with MgO in the range of 4 to 7 mol% suppresses the photorefractive damage. MgO:LiNbO3 is characterized by noncritical phase matching (NCPM) at room temperature and can achieved angle tuning SHG of Nd:YAG and Nd:YLF laser
MgO:LiNbO3 is commonly used for electro-optical modulation (EOM Q-switches), high power frequency doublers (SHG), mixers (SFG), optical parametric oscillators (OPO) and amplinbo3iers (OPA) and integrated waveguides.
Typical Applications/Devices for Mg:LiNbO3:
SHG und OPO pumped by Nd:YAG laser
Electro-optical devices
SAW (surface acoustic wave) devices
Eigenschaften
Optische Eigenschaften | |
|---|---|
Transmissionsbereich in nm | 320 ‐ 5600
|
Brechungsindex @1300 nm | ne=2,146 no=2,220 |
Reflexionsverluste in % an 1 Oberfläche @ 633nm | 14,6 |
optische Homogenität in 1/cm | 5·10-5 |
NLO Koeffizienten in pm/V | d33= 34,40 d31=d15= 5,95 d22= 3,07 |
optische Zerstörschwelle in MW/cm2 (10ns) | 300
|
Absorptionsverluste in %/cm @ 1064 nm | < 0,1 |
Physikalische Eigenschaften | |
|---|---|
Dichte in g/cm3 | 4,64
|
Schmelzpunkt in °C | 1253
|
Spezifische Wärmekapazität in J/(kg · K) | 628
|
Thermische Leitfähigkeit in W/(m · K) @25 °C | 4,19 (⊥ c-Achse) 4,6 (∥ c-Achse) |
Thermische Ausdehnung in 1/K @25°C | 14,8 · 10-6 (⊥ c-Achse) 4,1 · 10-6 (∥ c-Achse) |
Dielektische Konstante @ 298K, 100kH |
82
|
Wasserlöslichkeit in g/100g | unlöslich |
Mohs-Härte | 5 |
Knoop-Härte in kg/mm² | 630
|
Materialtyp | Einkristall, synthetisch
|
Kristallstruktur | hexagonal
|
Gitterkonstanten in Å | a = 5,15 c = 13,86 |
Elastizitätskonstanten in GPa | C11 = 202 C12 = 55 C13 = 71 C14 = 8,3 C33 = 242 C44 = 60,1
|
Elastizitätsmodul (E) in GPa | 170
|
Schubmodul (G) in GPa | 68 |
Kompressionsmodul (K) in GPa | 112 |
Poissonzahl | 0,25
|
Spektrale Eigenschaften | |
|---|---|
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