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¡¡Products / Non-Linear Crystals

BBO
 
Applications

1.Second,third,fourth and fifth harmonic generations of Nd:lasers;Frequency-doubling,-tripling and -mixing of Dye lasers;
2.Second, third & fourth harmonic generations of Ti:Al2O3 and Alexandrite lasers;
3.Optical parametric amplifiers(OPA) and optical parametric oscillators(OPO);
4.Frequency-doubling and-tripling of ultrashort pulse Ti:Sapphire and Dye Lasers;
5.Frequency-doubling of Argon ion, Cu-vapor and Ruby lasers; External intracavity SHG;

  
1. Structural and Physical Properties

Chemical formula 

¦Â-BaB2O4

Crystal Structure

trigonal,space group R3c 

Cell Parameters

a=8.4473Å, b=7.3788Å , c=5.1395Å , Z=2

Melting Point

1095¡À5¡æ

Transition Temperature

925¡À5¡æ

Optical Homogeneity

¦¤n¡Ö10-6/cm

Mohs Hardness

4.5

Density 

3.85g/cm3

Linear Absorption Coefficients

¦Á<0.001cm-1 (¦Ë=1064nm)
¦Á<0.01cm-1 (¦Ë=532nm)
¦Á<0.5cm-1 (¦Ë=255nm)

Hygroscopic Susceptibility

Low

Resistivity

>1011ohm-cm

Relative Dielectric Constant

¦ÅT11/¦Åo:6.7, ¦ÅT33/¦Åo:8.1,Tan ¦Ä,<0.001

Thermal Expansion Coefficients
(in the range of 25¡æ-900¡æ)
Thermal Conductivity

a, 4¡Á10-6/K
c, 36¡Á10-6/K
©Øc ,1.2w/m/k;¨Uc,1.6 w/m/k

2. Linear Optical Properties

Transparency Range: 189-3500nm,See Transparency Curve
Refractive Indices:
at 1.0642 ¦Ìm ne=1.5425, no=1.6551
at 0.5321 ¦Ìm ne=1.5555, no=1.6749
at 0.2660 ¦Ìm ne=1.6146, no=1.7571
Therm-Optic Coefficients:
dno/dT=-9.3¡Á10-6/¡æ dne/dT=-16.6¡Á10-6/¡æ
Sellmeier Equations:
N2o(¦Ë)=2.7359+0.01878/(¦Ë2-0.01822)-0.01354¡Á¦Ë2 (¦Ë in ¦Ìm, T=20¡æ)
N2e(¦Ë)=2.3753+0.01224/(¦Ë2-0.01667)-0.01516¡Á¦Ë2 (¦Ë in ¦Ìm, T=20¡æ)

3. NonLinear Optical Properties
Phase-Matchable Output Range: 189-1750nm
NLO Coefficients: d11=5.8¡Ád36(KDP)
Electro-optic Coefficients: 
d31=0.05¡Ád11, d22<0.05¡Ád11
¦Ã11=2.7pm/V, ¦Ã22 , ¦Ã31<0.1¦Ã11
Half-Wave Voltage: 48KV(at 1064nm)
Damage Threshold:
at 1.064 ¦Ìm 5GW/cm2(10ns);10GW/cm2(1.3ns);
at 0.532 ¦Ìm 1GW/ cm2(10ns);7GW/cm2(250ps);
at 0.266 ¦Ìm 12mW/cm2(8ns).
4.BBO's Main Specification

Transmitting wavefront distortion

<Lambda/8@633nm

Dimension tolerance

¡À0.1mm

Flatness

< Lambda/8@633nm

Perpendicularity

<5 arc minutes

Parallelism

<15 arc seconds

Suface Quality

10/5 Scratch/Dig Per Mil-O-13830A

Angle tolerance  
Theta<¡À 0.5¡ã,phi<¡À0.5¡ã

Coating

AR R<0.2%@1064&532nm ect.,