Optical grade LiNbO3 wafers SLN CLN

Optical grade LiNbO3 wafers SLN CLN


Optical grade LiNbO3 wafers SLN CLN

Lithium Niobate has good electro-optic and acousto-optic characteristics. Due to these properties LN wafers are used in optical applications for electro-optic waveguide amplitude modulation, phase modulators, quasi-phase matching for SHG and OPO, polarizer for optical isolators.

Optical grade lithium niobate (LiNbO3) wafers can be classified into different types based on their dopant concentration and composition. Two common types are SLN (stoichiometric lithium niobate) and CLN (congruent lithium niobate).

SLN wafers are made from a stoichiometric ratio of lithium niobate, which means that the amount of lithium and niobium is balanced. This results in a crystal with a high level of purity and uniformity, making it ideal for use in high-end optical devices, such as waveguides and modulators. SLN wafers have a low coercive field, high optical damage threshold, and high nonlinear coefficient, making them an excellent choice for applications where high optical power is involved.

CLN wafers, on the other hand, are made from a lithium niobate crystal with a slightly higher concentration of niobium. This makes them easier to produce and less expensive than SLN wafers. CLN wafers have a higher coercive field, which means that they are less susceptible to polarization reversal due to external electrical fields. However, they have a lower optical damage threshold and a lower nonlinear coefficient compared to SLN wafers.

Both SLN and CLN wafers are used in a variety of optical applications, such as frequency converters, modulators, and sensors. The choice of wafer type depends on the specific requirements of the application, such as the desired optical properties, electrical properties, and cost.

Material Optical Grade LiNbO3 wafes (White or   Black)
Curie Temp 1142±0.7℃
Cutting Angle X/Y/Z etc
Diameter/size 2”/3”/4”  ±0.03mm
Tol(±) <0.20 mm ±0.005mm
Thickness 0.18 ~ 0.5mm or more
Primary Flat 16mm/22mm /32mm
TTV  <3µm
Bow -30<bow<30
Warp <40µm
Orientation Flat All available
Surface Type Single Side Polished(SSP) /Double Sides   Polished(DSP)
Polished side Ra <0.5nm
S/D 20/10
Edge Criteria R=0.2mm C-type or Bullnose
Quality Free of crack (bubbles and inclusions)
Optical doped Mg/Fe/Zn/MgO etc for optical grade   LN< wafers per requested
Wafer Surface Criteria Refractive index No=2.2878/Ne=2.2033 @632nm wavelength/prism   coupler method.
Contamination, None
Particles ¢>0.3 µ  m <= 30
Scratch , Chipping None
Defect No edge cracks, scratches, saw marks,   stains
Packaging Qty/Wafer box 25pcs per box

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