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You are here: Home / Laser Products / Laser Crystal / Tm:YAP

Tm:YAP laser crystal (Tm-doped YALO3).The wavelength of Tm:YAP laser is stable around 1.94 μm and depends on the direction of the crystal. Tm:YAP has highest local absorption in the IR region, it’s lifetime is from 3.81ms to 4.93ms, the temperature range is between 30◦C and 1350◦C. Tm:YAP crystal has a-c directions, the a-cut and b-cut Tm:YAP laser are widly used. In regard to Tm:YAP, the upper laser energy have 9 3H4 Stark levels, and the lower laser energy have 13 3H6 Stark levels. Tm:YAP has better performance and availability of high power laser at 794 nm. Tm:YAP is an outstanding crystal for high efficiency laser output.

Tm:YAP– 2um high efficiency output laser crystal.

As 2um laser crystals, Tm:YAP crystal havs a wide range of applications in medicine, laser radar and also atmospheric sensing. For example, Tm:YAP laser is a continuous-wave laser delivered via silica fibers, it would have great potential for stereotaxic neurosurgery. The fiber-coupled Tm:YAP laser system have been proposed for the delivery of photothermal therapies in medical applications.

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Parameter

Material and Specifications
Crystal Structureorthorhombic – Pbnm
Thermal Conductivity11 W/(m*k)
Refractive Index at 632 nm1.92 (na), 1.93 (nb), 1.94 (nc)
Optical Transition3F4→3H6
Absorption Cross-section3.7~8.5 x 10-21cm2
Fluorescence Life4.4~7.7ms
Emission Cross-section5~6 x 10-21cm2
Emission Wavelength1.98mm@a axis,1.94mm@b axis
Pump Wavelength of Diode794.8nm@a axis,793.5nm@b axis
Optical and Spectral Properties
Dopant ConcentrationsTm: 0.2~15at%
Orientations[010] or [100](Pnma)within 5°
Rod SizesDiameter 2~10mm, length 2~100mm
Wavefront Distortion≤0.125λ/25mm@632.8nm
Extinction Ratio≥25dB
Dimensional ToleranceDiamter:+0.00/-0.04, length: ±0.5mm
Parallelism≤10″
Perpendicularity≤5′
Flatnessλ/8@632.8nm
Surface Quality10/5 (MIL-O-13830A)
Chamfer0.15±0.05mm
AR coating reflectivity≤0.25%

 

Absorption and Emission Spectrum

Tm-YAP-973nm-absorbtion-spectrum

Feature
Application
Reference
News
Feature
  • High efficiency laser output
  • Highest local absorption in the IR region
  • Good physical and chemical performance
  • Direct line polarized laser emission
Application
  • Laser radar
  • Atmospheric sensing
  • Stereotaxic neurosurgery
  • Photothermal therapies
Reference
1.99 micron Tm:YAP acousto-optical Q-switch laser
Ya Wen et al 2019 IOP Conf. Ser.: Mater. Sci. Eng. 563 032007
102 mJ electron-optic Q-switch Ho:ScSi2O5 laser end-pumped by continuous-wave Tm:YAP laser
Optik – International Journal for Light and Electron Optics 173 (2018) 60–64
190-fs passively mode-locked thulium fiber laser with a low thresholdComparison of Yb:YAG crystals grown by CZ and TGT method
OPTICS LETTERS / Vol. 21, No. 12 / June 15, 1996
A Laser-Diode-Pumped Widely Tunable Single-Longitude-Mode Tm:YAP Laser at Room Temperature
CHIN.PHYS.LETT.Vol.24.No.9(2007) 2594
Anisotropy of thermal and spectral characteristics in Tm:YAP laser crystals
Journal of Alloys and Compounds 453 (2008) 482–486
Comparison of Tm:YLF and Tm:YAP in thermal analysis and laser performance
OCIS codes: 140.3480, 140.5680, 140.6810.
Continuously tunable diode pumped Tm:YAP laser
Proc. of SPIE Vol. 6190 619008-2
Development of a thulium (Tm:YAP) laser system for brain tissue ablation
Lasers Med Sci (2011) 26:699–706
Diode end-pumped passively Q-switched Tm:YAP laser with 1.85-mJ pulse energy
OPTICS LETTERS / Vol. 40, No. 7 / April 1, 2015
Diode-pumped Tm:YAP/YVO4 intracavity Raman laser
Journal of Physics: Conf. Series 844 (2017) 012021

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