Beta Barium Borate (b-BaB2O4 or BBO) |
| Introduction|Properties|Applications|Fabrication Specs.|Coating Specs.|Notes |
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GOT's coating engineers have developed the protective
coating which can prevent the polished surfaces of BBO from exposure to moisture,
considering the fact the polished surfaces are very easy to be fogged in humid air due to
its low hygroscopic susceptibility. P-coated BBO with a mount is much simpler and better
to use than BBO with housing. Significant advantages of protective coating are: |
Long lifetime |
over 6 months at 95% humidity and much longer at lower humidity |
Better transmission |
better than that of uncoated BBO over its all transparency range |
High damage threshold |
> 7 GW/cm2 at 1.064 mm (30 ps pulse width) |
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GOT can manufacture and supply single-band, dual-band and broad-band AR- coatings featured by anti-moisture and long durability, low reflectance, and high damage threshold for BBO at versatile applications (extra- and intra- cavity SHG, THG, 4HG, SFG, OPO, etc.). Typical AR-coatings and residual reflectivities are listed below for
reference. AR-coatings at other wavelengths are available upon customers' requests. |
| Single-band AR Coatings | AR@ 1.5mm, 1.064mm, 0.85mm, 0.532mm, 0.355mm, etc. (R< 0.05~0.15%) |
| Dual - band AR Coatings | AR@ 1.34/0.67mm, 1.064/0.532mm, 1.053/0.527mm, 1.047/0.523mm, 0.946/0.473mm, 0.8/0.4,mm, 0.532/ 0.266 mm (Rw<0.1~0.2%, R2w<0.2~0.4%) |
| Broad-band AR Coatings | AR@ 0.7~1.0mm, 0.8~0.95mm/0.4~0.475 mm, 0.4~ 0.75mm/0.355mm, etc. |
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