|
Matrix properties |
Crystal structure |
tetragonal |
Elementary cell parameters (Å) |
a = 7,12 b = 7,12 c = 6,29 |
Density (g/cm3) |
4,22 |
Atomic density (atoms/cm2) |
1,3×1020 |
Moh’s hardness |
5 |
Thermal expansion (°C–1): |
|
αa |
4,43×10–6 |
αс |
11,37×10–6 |
Thermal conductivity (W/m): |
|
axis а |
5,32 |
axis с |
5,10 |
Characteristics of crystal |
Nd3+ concentration (at.%) |
0,1 – 4 |
Lasing wavelengths (nm) |
914 1064 1342 |
Axial characteristics |
uniaxial no = na = nb ne = nc |
Refractive indices: |
|
at @ 1064 nm |
η0 = 1,9573, ηe = 2,1652 |
at @ 808 nm |
η0 = 1,9721, ηe = 2,1858 |
at @ 532 nm |
η0 = 2,0210, ηe = 2,2560 |
Sellmeier equation |
η20 = 3,77834 + 0,069736/(λ2 – – 0,04724) – 0,0108133×λ2 η2e = 4,59905 + 0,110534/(λ2 – – 0,04813) – 0,0122676×λ2 |
Thermal optic coefficient (°C–1): |
|
dηa / dt |
8,5×10–6 |
dηc / dt |
3,0×10–6 |
Stimulated emission cross-section @ 1064 nm (cm2) |
25,0×10–19 |
Luminescent lifetime (μm) |
90 (50 for 2 at.% Nd3+) |
Absorption coefficient for 1,1 at.% Nd3+ at @ 808 nm (cm–1) |
31,4 |
Intrinsic loss @ 1064 nm (cm–1) |
0,001 |
Gain bandwidth @ 1064 nm (nm) |
0,96 (257 GHz) |
Polarized laser emission |
p – polarization, parallel to optical axis (axis c) |
Diode Pumped Optical to Optical Efficiency |
> 60% |
Specification of laser rods (sizes and processing) |
Diameter (mm) |
1,5 – 25 |
Length (mm) |
0,5 – 30 |
Diameter tolerance (mm) |
± 0,1 |
Length tolerance (mm) |
± 0,5 |
Non-parallelism of end faces (s) |
10″ |
Surface finish |
Scratch-dig 10-5 |
Flatness |
λ/10 |
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The yttrium vanadate (YVO 4) falls under the category of birefringent crystals and meet all necessary demands to be very prospective material for fibre optical communication systems. It's ideal for optical polarizing components such as fibre optical isolators, beam displacers and circulators. YVO 4:Nd 3+ is one of the most effective and advanced for diode pumped lasers. Compared to YAG:Nd 3+ and YLF:Nd 3+, YVO 4:Nd 3+ diode pumped lasers have the following advantages: wide absorption bandwidth, low lazing threshold, high slope efficiency, large luminescent cross-section, linearly polarized emission and single-mode output. Compactly designed YVO 4:Nd 3+ lasers with green, red and blue light output are really perfect means for material processing, spectroscopy, medical diagnostics, laser printing and other applications.
We also grow YVO 4:Er 3+, YVO 4:Er 3+,Yb 3+ crystals, emitting at @ 1,54 μm.
Configuration of rod's cross section Round and Square.
Sizes and dimensions of elements can be varied according to customer's demand.
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