Thulium-doped yttrium aluminate (Tm:YAP) crystal data and related product catalog

Thulium-doped yttrium aluminate crystal (Tm:YAP) crystal
Tm: YAP crystal Chinese name thulium-doped yttrium aluminate crystal, Tm: YAP crystal has an ideal medium for a solid-state laser source with a wavelength of 2 microns, Tm: H4 and F4 energy levels of YAP The self-quenching mechanism can produce two-photon excitation at the upper energy level, which potentially makes lasers an effective way to obtain high quantum efficiency. The absorption band peak of the H6 and H4 energy levels of the Tm:YAP crystal is 795nm, which is very suitable for high-power AlGaAS laser diode pumping. The absorption peak of the Tm:YAP crystal width is also wider than that of the Tm:YAG crystal, making the Tm:YAP crystal an ideal laser material even when the diode wavelength changes.
The wavelength of laser light emitted by Tm:YAP crystal is related to the crystal direction. The most common cutting directions are a direction and b direction.
Tm: YAP crystal "a" cut "b" cut
Absorption peak 794.8nm 793.5nm
peak effective pump absorption coefficient (4% Tm) aa=3.6/cm aa=3.3/cm
emission wavelength peak 1.98μm 1.98μm
Tm: YAP crystal Advantages:
1) Excellent physical and chemical properties;
2) 2m band laser output efficiency is higher than Tm: YAG;
3) Direct linearly polarized light output;
4) LD pump absorption bandwidth is 4nm wider than Tm: YAG crystal;
5) 795nm The pump absorption band is better matched to the emission wavelength of the commonly used AlGaAs diode.
Doping concentration Tm: 0.2~15at%
Crystal orientation [010] or [100] (Pnma), deviation within 5°
Crystal size diameter 2~10mm, length 2~100mm can be customized according to customer requirements
Wavefront distortion≤0.125/[email protected]
Extinction ratio≥25dB
Dimensional tolerance diameter: +0.00/-0.04, length 0.5mm
cylindrical surface processing fine grinding or polishing
End surface parallelism ≤10"
end surface and rod shaft perpendicularity ≤5 ′
End surface flatness /[email protected]
Surface finish 10/5 (MIL-O-13830A) Beveling
0.15±0.05mm
AR coating reflectivity ≤0.25 %
Spectral characteristics:
optical transition 3 F4 3H6
absorption cross section 3.7~8.5 x 10-21cm2
fluorescence lifetime 4.4~7.7ms
emission cross section 5~6 x 10-21cm2
emission wavelength 1.98m@a axis, 1.94m@b axis
diode pump wavelength 794.8nm@a axis, 793.5nm@b axis
materialization Performance: YAP
space group D162h (Pnma)
lattice Changshu (Å) a=5.307, b=7.355, c=5.176
Melting point (℃) 1850±30
Thermal conductivity (W·cm-1 ·K -1) 0.11
Coefficient of thermal expansion (10-6 ·K -1) 4.3//a, 10.8//b, 9.5//c
Density (g/cm-3) 5.35
Refractive index 1.943//a, 1.952//b, 1.929//c @589nm
Hardness (Mohs) 8.5-9
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