Non-linear Crystal ß-Barium Borate (ß-BaB2O4 or BBO)
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ß-Barium Borate (ß-BaB2O4 or BBO) is an excellent optical non-linear crystal recently developed. 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. When 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.

  • For harmonic generation (SHG, THG, 4HG, 5HG) of Nd:YAG laser, SHG, THG of Ti: Sapphire, Alexandrite lasers
  • For tunable solid state lasers using OPO (pumped by 355, 532 or 1064 nm)
  • For UV sources from SHG, SFG of dye lasers
  • For autocorrelation (in thin plates) in shortpulse (ps and fs) lasers

Transparency range, nm 190 - 2600
Point group 3m
Space group R3c
Lattice parameters, Å a = 12.532; c = 12.717 Å
Density, g/cm3 3.85
Mohs hardness 4
Refractive indexes:
at 1064 nm ne = 1.5425; no = 1.6551
at 532 nm ne = 1.5555; no = 1.6749
at 355 nm ne = 1.5775; no = 1.7055
at 266 nm ne = 1.6139; no = 1.7570
at 213 nm ne = 1.6742; no = 1.8465
Non-linear coefficient, pm/V d22 = 1.6; d31 = 0.08
Cut off SHG Type I - 411 nm; Type II - 527 nm
Work off Type I, 1064 nm - 3.2°
Temperature acceptance Type I, 1064 nm - 55 °C "cm
Optical damage threshold 1 - 2 GW/cm2 (1064 nm, 10 ns)
Conversion efficiency, % 30 (1064 nm, 20 ns, 3 W)
35 (1780 nm, 20 ns, 20 Hz, 2 W)
20 (1064 nm, 20 ns, 50 Hz, 2 W)

  We supply BBO optical elements made according to customers' order.

I N Q U I R Y    F O R M :

Quantity of elements:

For example: SHG@1064; SFG@800+267->200; DFG@780-842->10600; OPO@355->460÷560+960÷1150; etc.
polished sites:

 a-b b-c a-c
or d  
Type & angles:
 I    II         angles:  theta  , phi
For example:
10.0 +/- 0.1

For example: p-coating, ARC s1/s2 1064 R<0.25%; ARC s1/s2 1064 R<0.25%+532<0.5%;
BBAR s1/s2 1064 R<1%+3÷10<5% etc.
a = mm;
c = mm
b     = mm or
dia. = mm;
This field is for additional information such as application,
comments, add. requirements etc.

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