YVO4 - Yttrium Orthovanadate

DATE: 2022-6-21 16:07:58 SEO：http://www.hctprism.com/product839051.html

Introduction

The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good temperature stability, physical and mechanical properties. It is ideal for optical polarizing components because of its wide transparency range and large birefringence. It is an excellent synthetic substitute for Calcite (CaCO3) and Rutile (TiO2) crystals in many applications including fiber optic isolators and circulators, interleavers, beam displacers and other polarizing optics ( refer to Table 1).

Table 1. Comparison of Basic Properties Between YVO4 and Other Birefringent Crystals

		YVO4	TiO2	CaCO3	LiNbO3
Thermal Expansion (/℃)	c-axis	11.4 × 10-6	9.2 × 10-6	26.3 × 10-6	16.7 × 10-6
Thermal Expansion (/℃)	a-axis	4.4 × 10-6	7.1 × 10-6	5.4 × 10-6	7 × 10-6
Refractive Index	no	1.9447 @1550 nm	2.454 @1530 nm	1.6346 @1497 nm	2.2151 @1440 nm
Refractive Index	ne	2.1486 @1550 nm	2.710 @1530 nm	1.4774 @1497 nm	2.1413 @1440 nm
Birefringence (ne-no)		0.2039 @1550 nm	0.256 @1530 nm	-0.1572 @1497 nm	-0.0738 @1440 nm
Mohs Hardness		5	6.5	3	5
Deliquescence		None	None	Weak	None
Transparency Range		0.4-5 μm	0.4-5 μm	0.35-2.3 μm	0.4-5 μm

A reliable supplier of YVO4 crystals

Now Company has completed its strong mass-production line that can provide：

Various size of bulk and finished high quality YVO4 crystals up to φ35 x 50mm3 and φ20 x 20mm3, respectively；
Large quantity YVO4 wedges and displacers used for fiber optical isolators and circulators, interleavers, in size of 1.25 x 1.25x0.5mm3 to 3 x 3 x 15mm3 to meet OEM customer's requirement；
Quick delivery;
Competitive price;
Strict quality control;
Technical support.

Table 2. Basic Properties

Transparency Range	High transmittance from 0.4 to 5 μm
Crystal Structure	Zircon Tetragonal, space group D4h
Lattice Parameter	a = b = 7.12 Å; c = 6.29 Å
Density	4.22 g/cm3
Mohs Hardness	5, glass-like
Hygroscopic Susceptibility	Non-hygroscopic
Thermal Expansion Coefficient	αa = 4.43×10-6 /K; αc= 11.37×10-6 /K
Thermal Conductivity Coefficient	// C: 5.23 W/m/K; ⊥C: 5.10 W/m/K
Thermal Optical Coefficient	dna/dT = 8.5×10-6 /K; dnc/dT = 3.0×10-6 /K
Crystal Class	Positive uniaxial with no = na= nb, ne = nc
Refractive Indices, Birefringence (Δn = ne- no) and Walk-off Angle at 45°(ρ)	no = 1.9929, ne = 2.2154, Δn = 0.2225, ρ = 6.04o at 630 nm no = 1.9500, ne = 2.1554, Δn = 0.2054, ρ = 5.72o at1300 nm no = 1.9447, ne = 2.1486, Δn = 0.2039, ρ = 5.69o at 550 nm
Sellmeier Equation (λ in µm)	no2 = 3.77834 + 0.069736 / (λ2 - 0.04724) - 0.0108133 λ2 ne2 = 4.59905 + 0.110534 / (λ2 - 0.04813) - 0.0122676 λ2

Applications
YVO4 crystals are widely used in fiber-optic isolators, beam displacers and optical circulators, etc.

1. Specifications of birefringent wedges for fiber-optic isolators

Aperture	1.0 × 1.0 mm2 to 4 × 4 mm2
Dimension Tolerance	±0.1mm
Wedge Angle Tolerance	±0.1 °
Optical Axis Orientation	± 0.5 °
Flatness	λ/4 @633 nm
Surface Quality (Sctrach/Dig)	20/10 to MIL-PRF-13830B
AR-Coating	R < 0.2% @1550 or 1310 nm
Standard Size	1.25 mm × 1.25 mm × 0. 5 mm with 13 ° or 15 ° wedge, phi = 22.5 °

2. Specifications of YVO4 beam displacers for fiber-optic circulators or interleaver

Dimension Tolerance	(W ± 0.05 mm) × (H ± 0.05 mm) × (L ± 0.1 mm)
Optical Axis Orientation	± 0.5 °
Parallelism	20 arc sec
Perpendicularity	≦ 15 arc min
Flatness	λ/4 @633 nm
Surface Quality (Scratch/Dig)	20/10 to MIL-PRF-13830B
AR-Coating	R<0.2% @1550 nm or 1310 nm ± 40 nm
Standard Size	2.6 × 2.6 × 10 mm3, θ = 45 °, Φ = 0 °

Note: Other sizes and specifications are available upon request.

Related tags：Fiber laser,Yttrium vanadate YVO4,

PREV：没有了
NEXT：Biomedical filter

Category

YVO4 - Yttrium Orthovanadate