YVO4

Undoped YVO ₄ crystal is widely used in many beam displace online_orderings because of its large birefringence. It also has good physical and favorable mechnical properties than thers birefringent crystals, which make YVO ₄ well suited for compact fiber optical components, such as isolators, circulators and interleaver etc.

Capabileties:

1)	Diameter : max. 25mm
2)	Length: max. 30mm
3)	Surface Quality: better than 2 0/10 scratch/dig Per MIL-0-13830A
4)	Beam Deviation: <3 arc min
5)	Optical Axis Orientation: +/-0.2°
6)	Flatness: < l /4 @633nm
7)	Transimission Wavfront Distortion: <l /2 @633nm
8)	Coating: upon customer's Specification

Physical and Optical Properties

Transparency Range	400~5000nm
Crystal Symmetry	Zircon tetragonal, space group D4h
Crystal Cell	A=b=7.12 °, c=6.29 °
Density	4.22 g/cm ²
Hygroscopic Susceptibility	Non-hygroscopic
Mohs Hardness	5 glass like
Thermal Optical Coefficient	dn _a /dT=8.5x10^-6 /K; dn_c /dT=3.0x10^-6 /K
Thermal Conductivity Coefficient	\|\|C: 5.23 w/m/k; ⊥C:5.10w/m/k
Crystal Class	Positive uniaxial with n_o=n_a=n_b, n_e=n_c
Refractive Indices, Birefringence( D n=ne-no) and Walk-Off Angle at 45 deg(ρ)	N_o=1.9929, n_e=2.2154, D _n=0.2225, ρ=6.04°, at 630nm N_o=1.9500, n_e=2.1554, D _n=0.2054, ρ=5.72°, at 1300nm N_o=1.9447, n_e=2.1486, D _n=0.2039, ρ=5.69°, at 1550nm
Sellmeier Equation (λ in μm)	n _o ² =3.77834+0.069736/(l² -0.04724)-0.0108133l² n e ² =4.5909+0.110534/(l² -0.04813)-0.0122676 l²

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