BIBO crystal (bismuth triborate) is a comparatively novel nonlinear material when compared with BBO and LBO crystals. BIBO crystal surpasses BBO in terms of its effective nonlinearity, while also offering a broader bandgap in comparison to KTP crystal. This combination makes BIBO crystal exceptionally suited for harnessing the phenomenon of second harmonic generation (SHG) within solid-state lasers and laser diodes.
Crystals available from stock
Description
Within the domain of nonlinear crystals, Bismuth Triborate (BIBO crystal) stands as a comparatively novel material when compared with counterparts like Beta Barium Borate (BBO) and Lithium Triborate (LBO)1. Notably, BIBO crystal surpasses BBO in terms of its heightened effective nonlinearity, while also offering a broader bandgap in comparison to Potassium Titanium Oxide Phosphate (KTP). This combination renders BIBO crystal exceptionally suited for harnessing the phenomenon of second harmonic generation (SHG) within solid-state lasers and laser diodes. And is particularly advantageous for generating wavelengths in the green and blue spectrum through continuous-wave (CW) radiation. The elevated effective nonlinearity of BIBO crystal not only enhances the efficiency of the SHG process but also facilitates the utilization of shorter crystal lengths — an indispensable attribute when endeavoring to engineer compact laser systems.
Specifications
Physical and Optical Properties
| Chemical formula | BiB3O6 (bismuth triborate) |
| Optical symmetry | negative biaxial |
| Crystal structure | monoclinic |
| Lattice constants | a = 7.12 Å, b = 4.99 Å, c = 6.51 Å, β = 105.62° |
| Density | 5.03 g/cm3 |
| Mohs hardness | 5 – 5.5 |
| Melting point | 726 °C |
| Refractive index (at 1064 nm) | nx = 1.7565, ny = 1.7831, nz = 1.9161 |
| Thermal conductivity coefficient | K//x = 7.8 Wm-1K-1, K//y = 7 Wm-1K-1, K//z = 17.3 Wm-1K-1 |
| Specific heat (330 K) | C = 0.5 Jg-1K-1 |
| Termal expansion coefficient | α//x = 48 x 10-6 °C-1, α//y = 4.4 x 10-6 °C-1, α//z = -26.9 x 10-6 °C-1 |
| Direct band-gap energy (293 K) | Eg = 4.32 eV |
| Transparency range | 286 – 2500 nm |
Standard manufacturing specifications
| Cut orientation error: | +/- 30 arcmin |
| Dimensions tolerance: | +/- 0.1 mm |
| Clear aperture: | > 85% |
| Surface quality: | 10-5 S-D |
| Surface flatness: | λ/10 @ 633 nm |
| Parallelism error: | < 20 arcsec |
| Perpendicularity error: | +/- 5 arcmin |
Nonlinear Applications
SHG @ 1064 nm, Type 1
| Type 1 | 1064(e) + 1064(e) → 532(o) |
| Phase matching angle (293 K) | Theta (θ) = 168.8° , Phi (φ) = 90° (YZ principal plane) |
| Effective nonlinearity | deff = 2.96 pm/V |
| Walkoff angle | 25.74 mrad (1064(e)) |
| Angular acceptance | 1.16 mrad x cm |
| Thermal acceptance | 2.9 K x cm |
Products
Product | Dimensions | Length | Theta | Phi | Coatings | Price | Quantity | |
|---|---|---|---|---|---|---|---|---|
| BIBO-SHG-1064-3x3x1 | 3 x 3 mm | 1 mm | 168.8° | 90° | AR/AR 1064+532 nm | Request | | |
| BIBO-SHG-1064-3x3x2 | 3 x 3 mm | 2 mm | 168.8° | 90° | AR/AR 1064+532 nm | Request | | |
