Passively Q-switched crystal V:YAG
V: YAG crystal is a new material of saturable wavelength absorber and passive Q-switch. The wavelength range is 1.06 μ m-1.44 μ m。 Especially applicable to 1.3 μ M Nd laser. It is an excellent saturable absorbent material in the 1300nm band. Element V has four chemical values: + 2, + 3, + 4 and + 5+ 3-valent V3 + ion is a common Q-switched and saturated absorption ion. It is doped into YAG based crystal to realize passive Q-switched and mode locking of laser. In the passive Q-switched solid-state laser, the laser has the advantages of good stability, long service life, miniaturization, simplicity and practicality.

Property

Chemical formula	V3+:Y3Al5O12
crystal structure	Cubic– la3d
Orientation	<100> <+/-0.5°
Transmittance	30%-97%
optical density	0.1-0.8
Atomic transition structure	Two-stage system
Recovery time	5~22 ×10-22 s
Attentively	(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
Transmit bandwidth	1000-1450 nm
Central absorption wavelength	1300 nm
Coating	Standard coating is AR with R
Coating	< 0.2%(@1340 nm)
Absorption coefficient	1.0cm-1 – 7.0cm-1
Damage threshold	>500MW/cm2

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