Er:YAP Crystals

Yttrium aluminium oxide YAlO3 (YAP) is an attractive laser host for erbium ions due to its natural birefringence combined with good thermal and mechanical properties similar to those of YAG.

Compound Formula: YAlO₃

Molecular Weight: 163.884

Appearance: Translucent crystalline solid

Melting Point: 1870 °C

Boiling Point: N/A

Crystal Phase / Structure: Orthorhombic

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Technical parameters

Yttrium aluminium oxide YAlO3 (YAP) is an attractive laser host for erbium ions due to its natural birefringence combined with good thermal and mechanical properties similar to those of YAG.
Er:YAP crystals with high doping concentration of Er3+ ions are typically used for lasing at 2,73 microns.
Low-doped Er:YAP laser crystals are used for of the eye-safe radiation at 1,66 microns by in-band pumping with semiconductor laser diodes at 1,5 microns. The advantage of such a scheme is low thermal load corresponding to low quantum defect.

Compound Formula	YAlO₃
Molecular Weight	163.884
Appearance	Translucent crystalline solid
Melting Point	1870 °C
Boiling Point	N/A
Density	5.35 g/cm³
Crystal Phase / Structure	Orthorhombic
Refractive Index	1.94-1.97 (@ 632.8 nm)
Specific Heat	0.557 J/g·K
Thermal Conductivity	11.7 W/m·K (a-axis), 10.0 W/m·K (b-axis), 13.3 W/m·K (c-axis)
Thermal Expansion	2.32 x 10^-6 K^-1 (a-axis), 8.08 x 10^-6 K^-1 (b-axis), 8.7 x 10^-6 K^-1 (c-axis)
Exact Mass	163.872 g/mol
Monoisotopic Mass	163.872 g/mol