Cr,Tm,Ho:YAG Laser Crystal

來源：發(fā)布時(shí)間：2019-12-25 94

Description

Cr, Tm, Ho: YAG Laser Crystal is high efficient laser crystal pumped by Xenon lamp or diode with wavelength of 2.1μm. the pump source main originates from the flashlamp energy absorbed by Cr3+, Ho3+ is working ion and Tm3+ acts as intermediary to transfer energy. 2.1 μm laser wave can be absorbed by water very well, transmits atmosphere easily and is safe to eye. Therefore, it is widely used in medical treatment, laser radar, military and so on. What’s more 2.1 μm laser is ideal pump source for 3-5 μm mid-infrared optical parametric oscillator.

Parameter

Material and Specifications

Doped Concentration	Ho:0.3~0.4at% Cr:0.3~1.2at% Tm:5~6at%
Wavefront Distortion	<λ/4@632nm
Extinction Ratio	≥25 dB
Rod Sizes	Diameter:3~6mm,Length:50~120mm
Dimensional Tolerances	Diameter:+0.00/-0.05mm, Length: ± 0.5mm
Barrel Finish	50-80 micro-inch (RMS)
Parallelism	≤30″
Perpendicularity	≤5′
Flatness	λ/10@ 633 nm
Surface Quality	10/5 Scratch / Digper MIL-O-1380A
Chamfer	0.006″±0.002″ at 45°± 5°
AR Coating Reflectivity	≤ 0.25% (@2094nm)

Physical and Chemical Properties

Structure	Cubic
Lattice Constant	12.01?
Melting Point	1970°C
Density	4.56g/cm³
Orientation	or <100]> crystalline within 5°
Thermal Expansion	7.8×10^-6/K
Thermal Conductivity	14W/m/K, 20°C；10.5W/m/K, 100°C
Mohs Hardness	8.5
Dielectric Constant	11.7

Optical and Spectral Properties

Laser Transition	⁵I₇ → ⁵I₈
Laser Wavelength	2.094 μm
Photon Energy	9.55 x 10-20 J
Emission Cross Section	7 x 10-21 cm2
Fluorescence Lifetime	8.5 ms
Index of Refraction	1.80 @2.08 μm
Aperture	>90%
Absorption Linewidth	4 nm
Diode Pump Band	781 nm
Major Pump Band	400~800 nm

Absorption and Emission Spectrum

Feature

Wide absorption band
Working at room temperature
2.1 mm lasing wavelength is for eye
High slope efficiency
Can be pumped by flash lamp or diode

Application

Medical Applications

2100nm laser
Laser medicine
Military
Laser radar

https://www.laser-crylink.com/laser-products/laser-crystal/crtm-ho-yag-crystal/

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