V:YAG Passive Q-Switch Crystal

22 May 2019

Description

There are four chemical values of V element: + 2, + 3, + 4 and + 5. The V3 + ions with + 3 valence are commonly used Q-switch and saturable absorbent ions, which are doped into YAG matrix crystals to realize the passive Q-switch and mode-locking of laser. V:YAG crystal is a new material of laser saturable absorber and passive Q-switch in wavelength range of 1.06μm-1.44 μ m. It is especially suitable for neodymium laser of 1. 3 μ m. It is an excellent saturable absorber material in wave band of 1. 3m. In the passively Q-switch solid-state laser, the laser has the advantages of good stability, long lifetime, miniaturization, simplicity and practicality.

Parameter

Properties

Property	Value
Chemical Formula	V3+:Y3Al5O12
Crystal structure	cubic – la3d
Orientation	<+/-0.5°
Transmittance	30%-97%
Optical density	0.1-0.8
Atomic transition structure	Two-level system
Recovery time	5~22 ×10-22 s
Concentrations	(0.05~0.35) wt%
Ground-state absorption cross-section	7.2 x 10-18 cm2
Excited-state absorption cross-section	7.4 x 10-19 cm2
Emission bandwidth	1000-1450 nm
Central absorption wavelength	1300 nm
Coatings	Standard coating is AR with R < 0.2%(@1340 nm)
Absorption coefficient	1.0cm-1 – 7.0cm-1
Damage threshold	>500MW/cm2

Polishing

Property	Value
Orientation Tolerence	< 0.5°
Thickness/Diameter Tolerance	±0.05 mm
Surface Flatness	<λ/8@632 nm
Wavefront Distortion	<λ/4@632 nm
Surface Quality	10/5
Parallel	30〞
Perpendicular	15ˊ
Clear Aperture	>90%
Chamfer	<0.2×45°
HR coating	<= 0.2% (@ 1340nm)