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KTP Crystals0 pages
NEW SOURCE
TECHNOLOGY,_
KTP Crystals
Introduction
Potassium Titanyl Phosphate (KTP) has the following exceptional properties that make it a
very important nonlinear crystal:
• Large nonlinear optical coefficient
^ Wide angular bandwidth and small walk-off angle
.j Broad temperature and spectral bandwidth
• High electro-optic coefficient and low dielectric constant
• Large figure of merit
• Nonhydroscopic, chemically and mechanically stable
© High thermal conductivity
• Moisture free
.j Minimum mismatch gradient
• Low cost compare with BBO and LBO
KTP is a negative biaxial crystal, with the principal axes X, Y, and Z (nz>ny>nx) parallel to
the crystallographic axes a, b, and c, respectively.
Structural and Physical Properties:
Crystal structure | Orthorhombic, space group Pna2i,point group mm2 |
Cell parameters | a=6.404A, b=10.616A, c=12.814A, Z=8 |
Melting point | 1172°C incongruent |
Curie point | 936°C |
Mohs hardness | =5 |
Density | 3.01 gW |
Color | colorless |
Hygroscopic susceptibility | no |
Specific heat | 0.1643 cal/g °C |
Thermal conductivity | 0.13 W/cm/°K |
Electrical conductivity | 3.5xl0"8 s/cm (c-axis, 22°C, lKHz) |
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