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In the field of nonlinear crystals, bismuth triborate (BIBO crystal) is a relatively novel material compared to materials such as barium borate (BBO) and lithium triborate (LBO). BIBO crystal with high effective nonlinearity surpasses BBO in improving effective nonlinearity, and also has a wider bandgap compared to potassium titanate phosphate (KTP). This combination makes BIBO crystals particularly suitable for utilizing the second harmonic generation (SHG) phenomenon in solid-state lasers and laser diodes. BIBO crystals have particular advantages in generating green and blue spectral wavelengths through continuous wave (CW) radiation. The effective nonlinearity improvement of BIBO crystals not only improves the efficiency of SHG processes, but also facilitates the utilization of shorter crystal lengths - which is indispensable in the design of compact laser systems.
Chemical and structural characteristics of BIBO crystals:
Density
| Crystal structure monoclinic | Point group 2 |
| Single spore parameters | a=7.116Å, b=4.993Å , c=6.508Å , β=105.62°, Z=2 |
| Melting point | 726℃ |
| Mohs scale | 5-5.5 |
| Density | 5.033 g/cm3 |
| deliquescence | Low |
| Thermal expansion coefficient | aa=4.8 x 10-5/K , ab= 4.4 x 10-6/K, ac=-2.69 x 10-5/K |
Linear and nonlinear optical characteristics:
| Transmittance range | 286- 2500 nm |
| Absorption coefficient | <0.1%/cm @ 1064nm |
| Frequency doubling(1064-532) | match supporting role: 168.9ofrom Z axis in YZ plane |
| Deff : 3.0 +/- 0.1 pm/V | |
| Receiving angle: 2.32 mrad.cm | |
| Discrete angle : 25.6 mrad | |
| Receiving temperature: 2.17° C.cm | |
| Axial | X∥b, (Z,a)=31.6°,(Y,c)=47.2° |
In the field of nonlinear crystals, bismuth triborate (BIBO crystal) is a relatively novel material compared to materials such as barium borate (BBO) and lithium triborate (LBO). BIBO crystal with high effective nonlinearity surpasses BBO in improving effective nonlinearity, and also has a wider bandgap compared to potassium titanate phosphate (KTP). This combination makes BIBO crystals particularly suitable for utilizing the second harmonic generation (SHG) phenomenon in solid-state lasers and laser diodes. BIBO crystals have particular advantages in generating green and blue spectral wavelengths through continuous wave (CW) radiation. The effective nonlinearity improvement of BIBO crystals not only improves the efficiency of SHG processes, but also facilitates the utilization of shorter crystal lengths - which is indispensable in the design of compact laser systems.
Chemical and structural characteristics of BIBO crystals:
Density
| Crystal structure monoclinic | Point group 2 |
| Single spore parameters | a=7.116Å, b=4.993Å , c=6.508Å , β=105.62°, Z=2 |
| Melting point | 726℃ |
| Mohs scale | 5-5.5 |
| Density | 5.033 g/cm3 |
| deliquescence | Low |
| Thermal expansion coefficient | aa=4.8 x 10-5/K , ab= 4.4 x 10-6/K, ac=-2.69 x 10-5/K |
Linear and nonlinear optical characteristics:
| Transmittance range | 286- 2500 nm |
| Absorption coefficient | <0.1%/cm @ 1064nm |
| Frequency doubling(1064-532) | match supporting role: 168.9ofrom Z axis in YZ plane |
| Deff : 3.0 +/- 0.1 pm/V | |
| Receiving angle: 2.32 mrad.cm | |
| Discrete angle : 25.6 mrad | |
| Receiving temperature: 2.17° C.cm | |
| Axial | X∥b, (Z,a)=31.6°,(Y,c)=47.2° |
