BBO 20x20x0.15mm for Type1 Phase Matching

Code: 20201-068

$1,970.00

Specifications:

Materials	BBO crystals	Size	(20± 0.1 mm) x (20± 0.1 mm) x (0.15 +/-0.02 mm)
Cut Angle	θ=35°±0.25°，Φ=90°±0.25°	Clear Aperture	central 90% size
Transmitting Wavefront Distortion	less than λ/8 @ 633nm	Flatness	λ/8 @ 633nm
Surface Quality	10/5 Scratch/Dig to MIL-O-13830A	Parallelism	better than 20 arc seconds
Perpendicularity	< 5 arc minutes	Coating	P coating (Single Layer MgF2)
Chamfer	0.2mm x 45°	Chips	<0.1mm
Quality Warranty Period	one year under proper use	Mounter Diameter	25.4mm Anodized Aluminium

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.
Our 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.

Chemical and Structure Properties:

Crystal Structure	Trigonal, space group R3c	Lattics Parameters	a=b=12.532?, c=12.717?, Z=6
Melting Point	About 1095℃	Mohs Hardness	4
Density	3.85g/cm³	Thermal Conductivity	1.2W/m/K(┴c): 1.6W/m/K(//c)
Thermal Expansion Coefficients	a11=4x10^-6 /K; a33=36x10^-6 /K

Optical and Nonlinear Optical Properties:

Transparency Range	190-3500nm	SHG Phase Matchable Range	409.6-3500nm(Type I) 525-3500nm(Type II)
Therm-optic Coefficients(/°C)	dno/dT=-16.6X10^-6 dne/dT=-9.3X10^-6	Absorption Coefficients	<0.1%/cm at 1064nm <1%/cm at 532nm
Angel Acceptance	55°C-cm	Spectral Acceptance	1.1nm-cm
Walk-off Angle	2.7° (Type I 1064 SHG) 3.2° (Type II 1064 SHG)	NLO Coefficients	deff(I)=d31sinθ+(d11cosΦ-d22sin3Φ)cosθ deff(II)=(d11sin3Φ+d22cos3Φ)cos2θ
Non-vanished NLO Susceptibilities	d11=5.8xd36(KDP) d31=0.05xd11 d22<0.05xd11	Sellmeier Equations (λ in μm )	no2=2.7359+0.01878 / (λ2-0.01822) -0.01354 λ2 ne2=2.3753+0.01224 / (λ2-0.01667) -0.01516 λ2
Electro-optic Coefficients	r22=2.7pm/V	Half-wave Voltage	7KV (at 1064nm,3×3×20mm^-6 )
Resistivity	>10¹¹ ohm-cm	Relative Dielectric Constant	εs11/εo:6.7 εs33/εo:8.1 Tan δ<0.001

Features:

Broad phase matchable range from 409.6nm to 3500nm
Wide transmission region from 190nm to 3500nm
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

Beta-Barium Borate (β-BaB2O4,BBO) or BBO crystal is an excellent non-linear crystal for frequency-conversion (SHG,THG, 4HG and 5HG) of Visible and Near IR laser light, OPO/OPG/OPA pumped by ultrafast pulses of wavelengths in the Near IR to UV, and sum-frequency mixing (SFM) into the Visible to the deep UV. BBO crystals is also used in the EO Q-switches for its high electro-optical coefficients. BBO is one of the few practical crystal for use below 500nm in SHG and SFM.

Size up to 25x25x20mm^3

Smallest thickness only 0.01mm

P coating, AR coating, mounts and repolishing service

20x20mm

0.15mm

35°

90°

P/P

Type1 Phase Matching

$1970

2 weeks