Properties of Nd:YVO4/YVO4 Crystal

Neodymium Doped Yttrium Orthvanadate (Nd:YVO4) is one of the most efficient laser host crystal currently existing for diode laser-pumped solid-state lasers. Its large stimulated emission cross-section at lasing wavelength, high absorption coefficient and wide absorption bandwidth at purrip wavelcngth, high lnscr induced darraye threshold as well as good physical9 optical and mechanical properties make Nd:YVO4 an excellent crysta for the high power, stable and cost-effective diode lasenpumped solid-state tasers. Recent developments have shown that Nd:YVO4 micro-lasers can produce powerful and stable IR and green or red lasers with the design of Nd:YVO4 + KTP.

Optical Properties:

Lasing Wavelength :

1064nm, 1342nm

Refractive Indices: @1064nm

1.9573(no)

2.1652(ne)
@808nm 1.9721(no) 2.1858(ne)
@532nm 2.0210(no) 2.2560(ne)
Sellmeier Equations: (Pure YVO4,l in µm)

no2 = 3.77834 + 0.069736 / (l2 - 0.04724) - 0.0108133l2

ne2 = 4.59905 + 0.110534 / (l2 - 0.04813) - 0.0122676l2
Therm-Optic Coefficient:(10-6/K) dna/dT=8.5 dnb/dT=8.5 dnc/dT=3.0
Absorption Coefficient: ~31.4%/cm @808nm
Absorption Length: 0.32mm @808nm
Stimulated Emission Cross-Section: 2.50x10-18 cm2 @1064nm
Fluorescent Lifetime: 90 µs (about 50 µs for 2 atm% Nd doped) @ 808nm
Intrinsic Loss: 0.02/cm @ 1064nm
Gain Bandwith: 0.96nm (257 GHz) @ 1064nm
Polarized Laser Emission: ppolarization;parallel to optic axis (c-axis)
Diode Pumped Optical to Optical Efficiency: >60%

Physical Properties:

Crystal Structure: Zircon Tetragonal, space group D4h
Cell Parameters: a=b=7.12Å, c=6.29Å
Mohs Hardness: »5
Density: 4.22g/cm3
Hygroscopic Susceptibility no
Thermal Conductivity(W/cm·K): parallel to c: 0.0523; vertical to c: 0.0510
Thermal Expansion Coefficient: parallel to a: 4.43x10-6; parallel to c: 11.37x10-6

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