Tm:YAP Crystal

Short Description:

Tm:YAP crystal is one of the most important crystals for LD pumping 2 μm laser. The anisotropic structure of Tm:YAP produces anisotropic emission cross section. Tm:YAP crystals with different orientations have different output wavelengths and operating forms for different functions. Tm:YAP has the following main advantages: Excellent physical and chemical properties; Higher output efficiency at 2 μm than Tm:YAG; Direct output of linearly polarized light. LD pump absorption bandwidth is 4nm wider than that of Tm:YAG crystal; The 795nm pump band matches the emission wavelength of AlGaAs diodes better.

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Tm:YAP crystal is one of the most important crystals for LD pumping 2 μm laser. The anisotropic structure of Tm:YAP produces anisotropic emission cross section. Tm:YAP crystals with different orientations have different output wavelengths and operating forms for different functions. Compared with the physical and chemical properties of Tm:YAG, the 795nm pump absorption band of Tm:YAP matches the emission wavelength of commonly used high-power AlGaAs diodes better. Tm:YAP has many advantages such as 4nm wider pump absorption bandwidth than that of Tm:YAG, higher efficiency, direct output of linearly polarized light.

Main Specifications
Dimensions	Length	2 ~ 100 mm (± 0.5 mm)
	Diameter	2 ~ 10 mm (+0.00, -0.05 mm)
Tm Concentration	0.2 ~ 15.0 atm%
Orientation	[010] or [100] (± 5°)
Wavefront Distortion	λ/4 per inch @ 633 nm
Barrel Finish	Fine ground (400#)
End Surface Parallelism	≤ 10”
Perpendicularity	≤ 5’
End Surface Flatness	λ/10 @ 633 nm
End Surface Quality	10-5 [s-d] (MIL-PRF-13830B)
Chamfer	0.15 ± 0.05 mm @ 45°
Extinction Ratio	≥ 25 dB
Coating	AR (R<0.25% @ 1980/1940 nm)