BBO Crystal

CASTECH's BBO is featured by

Broad phase matchable range from 409.6 nm to 3500 nm;
Wide transmission region from 190 nm to 3500 nm;
Large effective second-harmonic-generation (SHG) coefficient about 6 times greater than that of KDP crystal;
High damage threshold;
High optical homogeneity with dn >> 10-6/cm;
Wide temperature-bandwidth of about 55° C.

CASTECH offers BBO of
Strict quality control;
Crystal length from 0.02mm to 25mm and size up to 15x15x15 mm3;
P-coatings, AR-coatings, mounts and re-polishing services;
A large quantity of crystals in stock
Fast delivery (10 days for polished only, 15 days for AR-coated).

Coatings of BBO
CASTECH provides BBO with the following AR-coatings:
Dual Band AR-coating (DBAR)of BBO for SHG of 1064nm
Low reflectance (R<0.2% at 1064nm and R<0.5% at 532nm);
High damage threshold (>300MW/cm2 at both wqvelengths);
Long durability;
Broad Band AR-coating (BBAR) of BBO for SHG of tunable lasers.
Broad Band P-coating of BBO for OPO applications.
Other coatings are available upon request.
CASTECH Warranty on BBO Specifications

Dimension tolerance:
(W± 0.1mm)x(H± 0.1mm)x(L+0.5/-0.1mm) (L≥2.5mm)
(W± 0.1mm)x(H± 0.1mm)x(L+0.1/-0.1mm) (L<2.5mm)
Clear aperture: Central 90% or the diameter
No visible scattering paths or centers when inspected by a 50mW green Laser
Flatness: Less than λ/8 @ 633nm
Transmitting wavefront distortion: Less than λ/8 @ 633nm
Chamfer: ≤0.2mmx45°
Chip: ≤0.1mm
Scratch/Dig code: Better than 10/5 to MIL-PRF-13830B
Parallelism: ≤20 arc seconds
Perpendicularity: ≤5 arc minutes
Angle tolerance: ≤0.25°
Damage threshold[GW/cm2]:
>1 for 1064nm, TEM00, 10ns, 10Hz (polished only),
>0.5 for 1064nm, TEM00, 10ns, 10Hz(AR-coated);
>0.3 for 532nm, TEM00, 10ns, 10Hz(AR-coatd)
Quality Warranty Period: One year under proper use.

Notes
BBO has a low susceptibility to the moisture. The user is advised to provide dry conditions for both the use and preservation of BBO.
BBO is relatively soft and therefore requires precautions to protect its polished surfaces.
When angle adjusting is necessary, keep in mind that the acceptance angle of BBO is small.
CASTECH engineers can select and design the best BBO crystal, if the main parameters of your laser are provided, such as energy per pulse, pulse width and repetition rate for a pulsed laser, power for a cw laser, laser beam diameter, mode condition, divergence, wavelength tuning range, etc.
For thin BBO crystal, CASTECH can provide free holder for you.