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CLBO Crystal

Cesium Lithium Borate (CsLiB6O10,CLBO) is a newly developed crystal with excellent UV nonlinear feature,and widely used for semiconductor inspection,micro processing,bio-medical,UV-LIDAR,etc. Compared to BBO,it has larger spectral and temperature acceptance,larger angle tolerance and smaller walk-off angle (see Table 1). These advantages make CLBO obtain larger SHG conversion efficiencies than BBO. Moreover,it is suitable for FOHG and FHG of high-power Nd:YAG laser.


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CLBO is featured by

       •   Cut-off wavelength up to 180nm;
       •   Maximum FOHG and FHG conversion efficiencies of Nd:YAG laser;
       •   Relatively large effective NLO coefficient (about two times that of KDP);
       •   Wide acceptance angle and small walk-off angle;
       •   The VUV output at 193nm is available by phase matching;
       •   No saturation for high-power generation;
       •   Short grow cycle and large size.


CASTECH offers:

       •   Strict quality control;
       •   Cut angle and dimensions upon request;
       •   AR-coating,sealed-housing and repolishing services;
       •   Fast delivery (10 working days for polished only,15 working days for AR-coated).


 

Table1. Nonlinear Optical properties of CLBO and BBO Crystal

Wavelength(nm)

Crystal

Phase
Matching Angle(°)

Deff (pm/V)

Angle Tolerance

(mrad·cm)

Walk-off 

Angle (°)

Spectral  Acceptance

(nm·cm)

Temperature  Acceptance

(℃·cm)

532+532=266

CLBO

61.7

0.84

0.49

1.83

0.13

8.3

BBO

47.7

1.32

0.17

4.80

0.07

4.5

1064+266=213

CLBO

68.4

0.87

0.42

1.69

0.16

4.6

BBO

51.1

1.26

0.11

5.34

0.08

3.1


Table 2. Structural Properties of CLBO

Crystal Structure

Tetragonal,Space group

Lattice Constant

a=b=10.494Å,c=8.939Å

Symmetry

Z=4

Melting Point

About 844.5℃


Table 3. Optical and Nonlinear Optical Properties of CLBO

Transparency Range

180-2750nm

Effective NLO Coefficient

1.01pm/V at 532nm,1.16pm/V at 488nm,0.95pm/V at 1064nm

Damage Threshold

26GW/cm2

Walk-off Angle

1.78°at 1064nm,1.83°at 532nm,0.98°at 488nm

Angle Acceptance (mrad·cm)

1.02 at 1064nm,0.49 at 532nm,0.84 at 488nm

Spectral  Acceptance (nm·cm)

7.03 at 1064nm,0.13 at 532nm,0.09 at 488nm

Temperature  Acceptance (℃·cm)

9.4

NLO Coefficients

deff(Ⅰ)=d36sinθmsin(2 φ)

deff(Ⅱ)=d36sin(2θm)cos(2 φ)

Sellmeier Equations (λ in μm)

CLBO at 20℃

no2=2.2104+0.01018/(λ2-0.01424)-0.01258λ2

ne2=2.0588+0.00838/(λ2-0.01363)-0.00607λ2

(0.1914< λ <2.09 μm)


 

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