Laser crystal Cr+4:Y3Al5O12 or Cr+4:YAG

Laser crystal Cr+4:Y3Al5O12 or Cr+4:YAG - is a material that can be used as an active media for CW, pulsed or self mode-locked tunable NIR solid-state lasers with the tunability range of 1340 - 1580 nm as well as a media for Q-switching in lasers with operating wavelength at 950 - 1100 nm. It is particularly useful in practical applications because of convenient absorption band of Cr+4 around 1 mm which gives possibilities to pump it by regular Nd:YAG lasers. A saturation of absorption in the band at 1060 nm is useful for application in small sized Nd:YAG oscillators with flash lamp or laser diode pumping instead of based on dye or LiF:F-center passive Q-switches. With the usage of Cr+4:YAG crystal the self mode-locking (KML) regime is achievable. It gives an opportunity to build the laser source with pulse duration shorter than 100 fs at 1450 - 1580 nm.   Finally, its high thermal and radiation stability as well as excellent optical and mechanical properties will give you an opportunity to design reliable devices based on the crystal.

MAIN PROPERTIES OF Cr+4:YAG: Mechanical Properties Mohs hardness 8.5 Thermal conductivity, W x °K-1 x cm-1 0.12 Termooptical factor (dn/dt) 8.0 x 10-6 x °K-1 Spectral Properties Operating transition 3A2 - 3T2 Absorption band, nm 900 - 1150 Emission band, nm 1340 - 1580 Dopant level, at/cm3 1017 - 1018 Damage threshold at 1064 nm, 10 ns, MW/cm2 500 Upper-level lifetime at 300°K, ms 3.6 Quantum yield at 300°K, % 12 Absorption cross section at 1064 nm, cm2 5.0 x 10-18 Emission cross section at 1420 nm, cm2 4.5 x 10-19 We supply rods and slabs with different cross-sections, dimensions and coatings. Different dopants compositions with different concentrations are available for special customer requirements.

I N Q U I R Y    F O R M :

Material:	Cr+4:YAG laser material	Quantity of elements:
Application:	For example: SHG@1064; SFG@800+267->200; DFG@780-842->10600; OPO@355->460÷560+960÷1150; etc.	polished sites:    or	a-b b-c a-c or d
Dopant conc.:	% ;      Orientation:	Dimensions/Tolerances:	For example: 10.0 +/- 0.1
Coating:	For example: ARC s1/s2 1064 R<0.25%; ARC s1/s2 1064 R<0.25%+532<0.5%; BBAR s1/s2 1064 R<1%+3÷10<5% etc.	a = mm; c = mm	b = mm or dia. = mm;

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