Tm:YLF Crystal

Short Description:

Tm3+:YLF crystal has a high absorption peak around 792 nm which locates in the diode pumping range, and also has a cross-relaxation process that provides the possibility for each absorbed pump photon to produce to ions at higher laser energy level. Tm3+: YLF laser is very suitable as a pump source for Ho3+:YAG laser. This is due to the good overlap of the emission band of Tm3+:YLF and the absorption band of Ho3+:YAG, and the ability to produce a linearly polarized output. Furthermore, the refractive index of Tm3+:YLF decreases with temperature, leading to negative thermal lens effect, which is partially compensated by positive lens effect caused by convex end.

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Tm³⁺:YLF crystal has a high absorption peak around 792 nm which locates in the diode pumping range, and also has a cross-relaxation process that provides the possibility for each absorbed pump photon to produce to ions at higher laser energy level. Tm³⁺: YLF laser is very suitable as a pump source for Ho³⁺:YAG laser. This is due to the good overlap of the emission band of Tm³⁺:YLF and the absorption band of Ho³⁺:YAG, and the ability to produce a linearly polarized output. Furthermore, the refractive index of Tm³⁺:YLF decreases with temperature, leading to negative thermal lens effect, which is partially compensated by positive lens effect caused by convex end.

Main Specifications
Dimensions	Length	5 ~ 120 mm (± 0.5 mm)
	Diameter	3 ~ 10 mm (+0.00, -0.05 mm)
Tm Concentration	1.0 ~ 5.0 atm%
Orientation	[100] or [001] (± 1°)
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°
Coating	AR (R<0.25% @ 1910 nm)