Schott IOG-1 Phosphate Laser Glass

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Schott IOG-1 Phosphate Laser Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	IOG-1 is a chemically durable, sodium-aluminophosphate glass developed for use in active and passive waveguide devices, which can be fabricated by ion exchange in a molten KNO3 or AgNO3 salt bath. Cumulative Er2O3 and Yb2O3 doping levels can be selected anywhere from 0 to 20wt%. IOG-1 devices are discussed in “Arrays of distributed- Bragg-reflector waveguide lasers at 1536 nm in Yb/Er codoped phosphate glass,” Appl. Phys. Lett., Vol 74(6), 789-791 (1999). Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	2.74 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	3.0	pH = 0.3 at 25 °C
Alkali Class, AR	4.3	pH = 12 at 50 °C
Stain Resistance Class, FR	0.00	pH = 4.6 100 h at 25 °C

Mechanical Properties	Original Value	Comments
Hardness, Knoop	380	0.1/20
Modulus of Elasticity	61.2 GPa
Poissons Ratio	0.24
Fracture Toughness	0.540 MPa-m½	K_IC
Shear Modulus	24.7 GPa	Calculated

Thermal Properties	Original Value	Comments
CTE, linear	93.0 µm/m-°C @Temperature 20.0 - 40.0 °C
	112 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.780 J/g-°C
Thermal Conductivity	0.670 W/m-K
Transformation Temperature, Tg	474 °C

Optical Properties	Original Value	Comments
Refractive Index	1.523
	1.513 @Wavelength 1540 nm
	1.515 @Wavelength 1000 nm
Transmission, Visible	67.5 %

Descriptive Properties
Climatic resistance	1	Water Vapor at 40 – 50 °C for 30 h
Thermal Diffusivity	3.2 [10^-7 m²/sec]

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CSGT9934 / 183187

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