Lithium triborate
Lithium triborate or LBO is a non-linear optics crystal. It has a wide transparency range, moderately high nonlinear coupling, high damage threshold and desirable chemical and mechanical properties. This crystal is often used for second harmonic generation, for example of s. LBO can be both critically and non-critically phase-matched. In the latter case the crystal has to be heated or cooled depending on the wavelength.
Lithium triborate was discovered and developed by Chen Chuangtian and others of the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences. It has been patented.Chemical properties
- Point group: mm2
- Lattice parameters: a=8.4473 Å, b=7.3788 Å, c=5.1395 Å
- Mohs hardness: 6
- Transmission range: 0.16 – 2.6 μm
- Damage threshold: 25 J/cm2
- Thermal expansion coefficients: x: 10.8×10−5/K, y: −8.8×10−5/K, z: 3.4×10−5/K
- Specific heat: 1060 J/kg·K
- Melting point: 834 °C
Applications of lithium triborate (LBO) crystal
Lithium triborate crystals are applicable in various nonlinear optical applications:
