18 Years Factory Passive Q-Switches - Ho: YAG Crystals – Dien

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18 Years Factory Passive Q-Switches - Ho: YAG Crystals – Dien Detail:

Ho:YAG Ho3+ ions doped into insulating laser crystals have exhibited 14 inter-manifold laser channels, operating in temporal modes from CW to mode-locked . Ho:YAG is commonly used as an efficient means to generate 2.1-μm laser emission from the 5I7- 5I8 transition, for applications such as laser remote sensing, medical surgery, and pumping Mid-IR OPO’s to achieve 3-5micron emission. Direct diode pumped systems,and Tm: Fiber Laser pumped system have demonstrated hi slope efficiencies, some approaching the theoretical limit.

Basic Properties

Ho3+ concentration range	0.005 – 100 atomic %
Emission Wavelength	2.01 um
Laser Transition	⁵I₇ → ⁵I₈
Flouresence Lifetime	8.5 ms
Pump Wavelength	1.9 um
Coefficient of Thermal Expansion	6.14 x 10^-6 K^-1
Thermal Diffusivity	0.041 cm² s^-2
Thermal Conductivity	11.2 W m^-1 K^-1
Specific Heat (Cp)	0.59 J g^-1 K^-1
Thermal Shock Resistant	800 W m^-1
Refractive Index @ 632.8 nm	1.83
Melting Point	1965℃
Density	4.56 g cm^-3
MOHS Hardness	8.25
Young’s Modulus	335 Gpa
Crystal Structure	Cubic
Standard Orientation	<111>
Y3+ Site Symmetry	D₂
Lattice Constant	a=12.013 Å

Technical Parameters

Wavefront distortion	L/8per inch @633nm
Extinction ratio	>28dB
Wavefront distortion	L/8per inch @633nm
Extinction ratio	>28dB
Tolerance：Rods with diameter	(+0、-0.05)mm,( ±0.5) mm
Surface quality	10/5 Scratch/dig per MIL-O-1380A
Parallelism	<10arc seconds
Perpendicularity	<5arc minutes
Aperture	>90%
Flatness	λ/10@ 633 nm
Tolerance：Rods with diameter	(+0、-0.05)mm,( ±0.5) mm
Surface quality	10/5 Scratch/dig per MIL-O-1380A
Parallelism	<10arc seconds
Perpendicularity	<5arc minutes
Aperture	>90%
Flatness	λ/10@ 633 nm

Absorption coefficient

Er YAG02

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