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| Non-linear crystal ß-Barium Borate (ß-BaB2O4 or BBO) | |
| ß-Barium Borate
(ß-BaB2O4 or BBO) is an excellent optical non-linear
crystal developed recently. It exhibits broad phase matching range,
high non-linearity (about 6 times more than that of KDP), high
optical damage threshold, good mechanical and temperature stability.
This trigonal uniaxial crystal possesses wide transparency range
from 0.19 to 3.3 µm. Its useful transmission range (<5%/cm)
is 0.21 to 2.1 µm and it has been demonstrated to be efficient
for the generation of second harmonic radiation down to about
0.21 µm. It is also useful for broadly tunable optical parametric
oscillators (OPOs) and amplifiers (OPAs). Autocorrelation applications
may be performed down to 0.19um. Its exceptional IR transmission
and wide thermal acceptance bandwidth allow high average power
OPO/OPA operation, with minimal heating from long wavelength idler
radiation. BBO's relatively narrow angular acceptance bandwidth (especially in the UV) may limit its usefulness in certain applications involving lasers with less than diffraction limited beam quality. Its mild hygroscopicity should not limit its usefulness in most circumstances. BBO's broad phase-matchability makes it an excellent candidate for general use with Nd:YAG and other Q-switched/mode-locked solid-state lasers. Using a tunable Ti:sapphire, Alexandrite, or dye laser, BBO can be used to generate tunable radiation from the near IR to the UV. Such high power, widely tunable radiation would be useful for many applications, including spectroscopy, medicine, materials processing, nonlinear optics, LIDAR, remote sensing, and photochemistry. In the commercial market, solid state nonlinear systems based on BBO could compete with dye lasers, and have the advantage of lower operating cost and more convenient tuning over large frequency ranges. APPLICATIONS: <<<Back
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