Nd:YVO4 Crystal (Yttrium Vanadate) 

Crystals >>> Laser Crystals >>> Nd:YVO4 Crystal

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 a better choice than Nd:YAG for low-power devices such as hand-held pointers, and others compact lasers.

With advanced technology in growing and manufacturing of high quality Nd:YVO4 crystals, Red Optronics supplies a wide variety of finished crystals.  Our standard Nd:YVO4 production includes:

Main Specifications
Nd dopant concentration 0.2 ~ 3 atm%
Dopant tolerance within 10% of concentration
Length  0.02 ~ 20mm
Coating specification AR @ 1064nm, R< 0.1% & HT @ 808nm, T>95%
HR @ 1064nm, R>99.8% & HT@ 808nm, T>9%
HR @ 1064nm, R>99.8%, HR @ 532 nm, R>99% & HT @ 808 nm, T>95%
Orientation a-cut crystalline direction (+/-5℃)
Dimensional tolerance +/-0.1mm(typical), High precision +/-0.005mm can be available upon request.
Wavefront distortion <λ/8 at 633nm
Surface quality better than 20/10 Scratch/Dig per MIL-O-1380A
Parallelism < 10 arc seconds
Perpendicularity < 5 arc minutes
Surface flatness <λ/10 at 632.8nm
Clear aperture Central 95%
Chamfer 0.15x45o
Damage threshold over 15J/cm2 (rods without coating) over 700 MW/cm2 (coating)

Notes:
To inquire or order a finished Nd:YVO4 laser crystals, please provide specifications as listed above.  For most applications, we only need to know the following:
1)Nd-dopant concentration; 2)sizes; 3)surface quality; and 4) coating.


For special request, please provide detailed specification for evaluation and fabrication.

Physical Properties  
Atomic Density ~1.37x1020 atoms/cm2
Crystal Structure Zircon Tetragonal, space group D4h, a=b=7.118, c=6.293
Density 4.22 g/cm2
Mohs Hardness Glass-like, 4.6 ~ 5
Thermal Expansion Coefficient aa=4.43x10-6/K, ac=11.37x10-6/K
Thermal Conductivity Coefficient ||C: 5.23 W/m/K; ^C: 5.10 W/m/K
Melting Point 1810 25
Optical Properties
Lasing Wavelengths 914nm, 1064 nm, 1342 nm
Refractive indexes positive uniaxial, no=na=nb ne=nc
no=1.9573, ne=2.1652, @ 1064nm
no=1.9721, ne=2.1858, @ 808nm
no=2.0210, ne=2.2560, @ 532nm
Thermal Optical Coefficient dna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K
Stimulated Emission Cross-Section 25.0x10-19 cm2 , @1064 nm
Fluorescent Lifetime 90 ms (about 50 ms for 2 atm% Nd doped) @ 808 nm
Absorption Coefficient 31.4 cm-1 @ 808 nm
Absorption Length 0.32 mm @ 808 nm
Intrinsic Loss Less 0.1% cm-1 , @1064 nm
Gain Bandwidth 0.96 nm (257 GHz) @ 1064 nm
Polarized Laser Emission parallel to optic axis (c-axis)
Diode Pumped Optical to Optical Efficiency > 60%
Sellmeier Equation (for pure YVO4 crystals) no2(λ) =3.77834+0.069736/(λ2 - 0.04724) - 0.0108133λ2
no2(
λ) =4.59905+0.110534/(λ2 - 0.04813) - 0.0122676λ2

    

 

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