Schott IOG-2 Phosphate Laser Glass

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Schott IOG-2 Phosphate Laser Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	IOG-2 is a potassium-barium-alumino phosphate glass with high erbium and ytterbium cross sections for stimulated emission. Although not as chemically durable as IOG-1, IOG-2 is an excellent candidate for active photonic devices that require high gain. Information provided by SCHOTT.
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Physical Properties	Metric	English	Comments

Density	2.72 g/cc	0.0983 lb/in³

Chemical Properties	Metric	English	Comments
Acid Class, SR	4.0	4.0	pH = 0.3 at 25 °C
Alkali Class, AR	4.0	4.0	pH = 12 at 50 °C
Stain Resistance Class, FR	1.0	1.0	pH = 4.6 100 h at 25 °C

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	340	340	0.1/20
Modulus of Elasticity	54.0 GPa	7830 ksi
Poissons Ratio	0.27	0.27
Fracture Toughness	0.470 MPa-m½	0.428 ksi-in½	K_IC
Shear Modulus	21.3 GPa	3090 ksi	Calculated

Thermal Properties	Metric	English	Comments
CTE, linear	125 µm/m-°C @Temperature 20.0 - 40.0 °C	69.4 µin/in-°F @Temperature 68.0 - 104 °F
	145 µm/m-°C @Temperature 20.0 - 300 °C	80.6 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.750 J/g-°C	0.179 BTU/lb-°F
Thermal Conductivity	0.570 W/m-K	3.96 BTU-in/hr-ft²-°F
Transformation Temperature, Tg	375 °C	707 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.518	1.518
	1.508 @Wavelength 1540 nm	1.508 @Wavelength 1540 nm
	1.51 @Wavelength 1000 nm	1.51 @Wavelength 1000 nm
Transmission, Visible	66.8 %	66.8 %

Descriptive Properties
Climatic resistance	2		Water Vapor at 40 – 50 °C for 30 h
Thermal Diffusivity	2.92 [10^-7 m²/sec]

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CSGT9935 / 183188

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