LN crystal has good mechanical properties, is stable and has high optical uniformity, and is widely used in frequency doubling of wavelength > 1 concentration, as well as in OPO and QPM equipment.
Main features:
♦ Wide range of transparency and high electro-optical efficiency
♦ Has stable chemical and mechanical properties
♦ Small size, easy to grow into large crystals
♦ Low absorption loss, low damage threshold
♦ Not easy to deliquescence, high temperature stability
♦ Large electro-optic coefficient
Typical applications:
♦ Laser target designator
♦ Photoelectric Q switch
♦ Pulse rangefinder
♦ Laser medical applications, laser holography
Transparency curve of LN
Technical Parameters
| Argument Name | Values and Ranges |
Size tolerance | ±0.05 mm |
Dimension tolerance | ≤ 0.5° |
Clear aperture | > 90% |
Surface quality | 20/10 |
Flatness | < λ/8@633nm |
Wavefront distortion | < λ/4@633nm |
Parallelism | < 20 arc sec |
Perpendicularity | < 5 arc min |
Coating | AR |
| Quality warranty period | 1 year (with normal use) |
Crystal Structure and Physical Properties
Argument Name | Values and Ranges |
Crystal structure | Trigonal, Space group R3c, Point group 3m |
Crystal parameters | a=5.148 Å , c=13.863 Å |
Melting point | 1253℃ |
Curie temperature | 1140℃ |
Mohs hardness | 5 |
Density | 4.64 g/cm3 |
Elastic stiffness coefficient | CE11=2.33(× 1011 N/m2)；CE33 =2.77(× 1011 N/m2) |
Standard Size
| Product No. | Size（mm） | θ（°） | Φ（°） | Coating | Application |
| LN-601 | 6 × 6 ×25 | 25 | z-cut | AR/AR @ 1064 nm, with gold electrodes | - |
| LN-901 | 9 × 9 ×25 | 25 | z-cut | AR/AR @ 1064 nm, with gold electrodes | - |
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