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¡¡Products / Laser Crystals

Nd:YVO4
Yttrium Vanadate has been growing in popularity because of its high gain, low threshold, and high absorption coefficients at pumping wavelengths, which result from the excellent fit of the neodymium dopant in the crystal lattice. These advantages make Nd:YVO4 is a better choice than Nd:YAG for low-power devices such as hand-held pointers, and other compact lasers. With advanced technology on growing and manufacturing high optical quality Nd:YVO4 crystal of Nd dopant concentration:0.27~3atm%+/-0.1%.
1.Main Specifications: 
Dopant Level:
Nd: 0.27~3 at%
Dimensions Tolerance:

(W¡À0.1mm)x(H¡À0.1mm)x(L+0.2mm/-0.1)

Flatness:
¡ÜLambda/8 @632.8nm

 Parallelism:

¡Ü15" Arc Second
Perpendicularity
¡Ü5¡ä Arc Minute

 Surface Quality:

 10/5 Scratch/Dig. (per MIL-O-13830A)

Wavefront Distortion:
¡ÜLambda/8 @632.8nm

 AR Coating Reflectivity:

<0.2%@1064nm
Dimensions and coatings available for special customer requirements.
 
2. Basic Properties:

 Atomic Density:

 1.26x1020 atoms/cm3 (Nd1.0%)

 Crystal Structure:

 Zircon Tetragonal, space group D4h-I4/amd
 a=b=7.1193A,c=6.2892A

 Mohs Hardness:

 4-5(Glass-like)

 Thermal Expansion Coefficient(300K):

 ¦Áa=4.43x10-6/K
 ¦Ác=11.37x10-6/K

 Thermal Conductivity Coefficient(300K):

 //C:0.0523W/cm/K
 ¡ÍC:0.0510W/cm/K

 Density:

 4.22g/cm3

3. Optical Properties:

 Lasing wavelength:

 1064nm,1342nm

 Thermal optical coefficient (300K):

 dno/dT=8.5¡Á10-6/K
 dne/dT=2.9¡Á10-6/K

 Stimulated emission cross-section:

 25¡Á10-19cm2 @ 1064nm

 Fluorescent lifetime:

 90¦Ìs

 Absorption coefficient:

 31.4cm-1 @810nm

 Intrinsic loss:

 0.02cm-1 @1064nm

 Gain bandwidth:
 0.96nm@1064nm
 Polarized laser emission:
 ¦Ð polarization; parallel to optic axis(c-axis)
 Diode pumped optical to optical   efficiency:
 >60%
 Sellemeier equations:
 n02=3.77834+0.069736/(¦Ë2-0.04724)-0.010813¦Ë2
ne2=4.59905+0.110534/(¦Ë2-0.04813)-0.012676¦Ë2