LiNbO3 Crystal and Substrates

Super Performance of LN Crystals
     a. Piezoelectric Strain
     b. electro-optic
     c. voice-optic
     d. nonlinear

    

Fortune Optronics accumulates rich experience in growing and developing LiNbO3 Crystal (LN Crystal). LiNbO3 substrates with diameters of 3 inches, 4 inches and 5 inches are available in large quantity. We could provide prompt delivery (usually 3 days upon receipt of the payment.)

 

Basic Properties 
Crystal Structure Trigonal, point group 3m
Lattice Parameters a=5.148Å, c=13.863Å 
Density 4.64 g/cm3
Melting Point 1250 C 
Curie Point 1142??
Mohs Hardness 5
Dielectric Constant e11/e0 = 85; e33/e0 = 29.5
Thermal Conductivity 38 W/m/C at 25C
Thermal Expansion Coefficient a1=a2 =2x10-6/C, a3=2.2x10-6/ C at 25C
Piezoelectric Strain Constant d22 = 2.04 x 10-11 C/N, d33 = 19.22x10-11 C/N
Elastic Stiffness Constant CE11 = 2.04x1011 N/m2, CE33 = 2.46x1011 N/m2
Refractive Indexes n0=2.286 ne=2.203 @632.8nm
Refractive Indexes Grade  (633nm)=5x10-5/cm
Nonlinear Coefficients (pmV-1) d31=11.6
d33=86
d22=5.6
Electro-optic Coefficients pm/V r33=30.8
r31=8.6
r22=3.4
r51=28
Transparency rate 370~5000nm
=68%@633 nm

 

Optical and NLO Properties 
Transparency Region 3700 ~ 5000 nm 
Sellmeier Equations (l in mm) no2 = 4.9048+0.11768/(l2-0.0475)-0.027169l2
ne2 = 4.5820+0.099169/(l2-0.04443)-0.02195l2
Optical Homogeneity Dn ~ 5x105/cm2
Nonlinear Coefficients deff=13.6 d36(KDP) for OPO at 1064 nm
deff =14.6 d36(KDP) for SHG at 1300 nm
deff =45.0 d36(KDP) for QPM
Refractive Indexes none
2.2202.146@ 1300 nm
2.3222.156@ 1064 nm
2.2862.203@ 632.8 nm 
Electro-optic Coefficients (pm/V) Low frequencyHigh frequency
g333231
g31108.6
g226.83.4
Damage Threshold > 250 KW/cm2 at 1064 nm (10 ns) 

 

Linear Optical Properties 
Transparency Range:                  420-5200nm
Refractive Indices:
                                                  ne=2.146, no = 2.220 @ 1300 nm
                                                  ne= 2.156, no = 2.232 @ 1064 nm
                                                  ne= 2.203, no = 2.286 @ 632.8nm
Optical Homogeneity:                 ~ 5 x 10-5 /cm
Sellmeier Equations (l in mm):
                                                   n2o (l) = 4.9048+0.11768/(l2 - 0.04750) - 0.027169l2
                                                   n2e (l) = 4.5820+0.099169/(l2 - 0.04443) - 0.021950l2

 

Nonlinear Optical Properties 
NLO Coefficients d33 = 34.4 pm/V
d31 = d15 = 5.95 pm/V
d22 = 3.07 pm/V
Efficiency NLO Coefficients deff =5.7 pm/V or ~14.6 x d36 (KDP) for frequency doubling 1300 nm;
deff =5.3 pm/V or ~13.6 x d36 (KDP) for OPO pumped at 1064 nm;
deff =17.6 pm/V or ~45 x d36 (KDP) for quasi-phase-matched structure.
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 3.03 KV
Electrical field||z, light||z: 4.02 KV 
Electrical field||x or y, light||z:
Damage Threshold 100 MW/cm2 (10 ns, 1064nm)

 

Standard Specifications of laser grade LiNbO3 crystals: 
Transmitted wavefront distortion better than l/4 @ 633nm
Dimension tolerance (W?.1mm) x (H?.1mm) x (L?.2mm)
Clear aperture over 90% central diameter
Flatness ?/8 @ 633nm
Surface quality 20 /10 Scratch/Dig
Parallelism better than 20 arc sec
Perpendicularity 5 arc min
Angle tolerance Dq < 0.5o, Df < 0.5o
AR-coating Per your requirements

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