Single crystal YVO4
Size: 10mm x 10mm x 0.5mm
Orientation: (100)
Polish: one side polished.

YVO4 is a new birefringent crystal for fiber optics. YVO4 is an ideal material for optical polarizing components, such as fiber optic isolators, beam displacers, circulators, etc because  of  its wide transparency range and large birefringence. Its medium hardness renders it particularly amenable to high quality polish and optical finish with ease.

MTI Corporation has set up a joint venture with Anhui Optics Research Institute of Chinese Academy of Science, KMT Co. Ltd. located in Hefei, China, and has been producing high quality,  low cost YVO4 single crystals and related components since 1997. Depending on customer's choice, we can supply crystal boules (up to 30 mm dia x 35 mm length), as-cut blocks or polished components with or without AR coating.

MTI concentrates on crystal business only and has no intention to manufacture fiber optical devices in competition with any of its customers.   Therefore MTI is your reliable long-term partner in fiber optics industries.

	Typical Properties of YVO4 crystal
Crystal Structure	Tetragonal:   a = b = 7.12 Å    c = 6.29 Å
Growth Method	Czochralski
Melt Point	1825  oC
Density	4.22   g/cm3
Hardness	5  ( mohs)
Thermal Expansion	aa= 4.43 x10-6/ oC                ac= 11.37  x10-6/ oC
Thermal Conductivity,	A axis 5.32 W/(m.k)              C axis = 5.10 W/(m.k)
Thermal Optic Coefficient	dh a / dT :   8.5x10-6/ oC        dh c / dT :   3.0 x10-6/ oC
Transmission Range	~ 80%  at 400 nm ~ 4000 nm range
Refractive Index  h Birefringence (Dn) and walk-off angle at 45° (r)	h o= 1.9929    h e= 2.2154    Dh = 0.2225    r=6.04o    at  l 0.63 mm h o= 1.9500    h e= 2.1554    Dh = 0.2054    r=5.72o    at  l 1.30 mm h o= 1.9447    h e= 2.1486    Dh = 0.2039    r=5.69o    at  l 1.55 mm
Sellmeier Equation ( l in mm )
ho2 = 3.77834 + 0.069736/(l2 –0.04724) – 0.0108133 ´ l2 he2 = 4.59905 + 0.110534/(l2 –0.04813) – 0.0122676 ´ l2
Standard Products and Specs
As - grown boules  <100 >  or <001> ori.± 0.5o	20  mm diameter   x up to  20  mm length ( We don't suggest you purchase boules unless it is  necessary because of  the difficulty in quality verification at this stage )
As-cut blocks q=0 or 45o, f=0 or 45o	3.2 x3.2 x 10.3  mm 4.2 x 4.2 x 10.3  mm  ( or any size available from  crystal boule )
Optically polished parts q=0 or 45o, f=0 or 45o 2 sides polished	Dimension Tolerance : ± 0.05 mm Orientation Tolerance : ± 0.5 o Tolerance Parallelism : < 15"            for any size upon customer request Flatness:                        < l/4 Surface quality:              10/5
AR coating:	R < 0.25% @1550 nm        ( available upon request )