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Yb:CALGO Laser Crystal

Yb: cagdalo4 (CALGO) is a promising new laser gain material with many important advantages. The crystal structure of calgo is tetragonal. When it is pumped at 979 nm in π configuration, we can θ A wide emission spectrum from 994 nm to 1050 nm was obtained

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Yb: CALGO Laser Crystal
Yb: cagdalo4 (CALGO) is a promising new laser gain material with many important advantages. The crystal structure of calgo is tetragonal. When it is pumped at 979 nm in π configuration, we can θ A wide emission spectrum from 994 nm to 1050 nm was obtained. This means a very small quantum defect (as low as 1.5%) and gives a good expectation of obtaining ultrashort pulses. Its thermal conductivity is also very high: k = 6.7w/m/k, which means that it can be used in high-power laser applications.

It has been found that Yb doped cagdalo4 crystal (Yb: CALGO) shows excellent performance in producing high-power and ultrashort laser pulses. It has a wide and smooth transmission bandwidth and can produce very short pulses (< 100 fs). In addition, its high thermal conductivity enables it to maintain high-power pumping (the thermal conductivity of 2 at.% Yb: calgo along the A and C axes is 6.9 and 6.3 WK-1 M-1, respectively); The generation of very short pulses and high average power femtosecond oscillators has been demonstrated.
Yb: cagdalo4 (Yb: calgo) – Yb doped crystals for high power and ultrashort (femtosecond) lasers
Recently, it has been found that Yb3 +: cagdalo4 is very interesting for the development of diode pumped short pulse mode-locked lasers. Compared with titanium doped sapphire crystal (since the early 1990s, the ultrashort laser system has been selected and the chirped pulse amplification technology can produce very short and powerful pulses), Yb: calgo can directly pump semiconductor laser (green laser pumped titanium sapphire crystal) through very efficient and high power.
Basic Properties:

Crystal structure	Tetragonal
Point group	I4/mmm
Cell Parameters	a = 3.6585Å;
Cell Parameters	c = 1.1978 Å
Mohs hardness	6
Density, g/cm³	4.8
Melting Point(C°)	1850
Thermal conductivity (W/m/K)	K[001] =6.3
Thermal conductivity (W/m/K)	K[001] =6.9
Thermal expansion coefficient (10-6 /K)	10.1(//a);
Thermal expansion coefficient (10-6 /K)	16.2(//c)
Lasing Wavelength	994-1050nm
Absorption Wavelength	979nm
Absorption Cross Section (pi configuration at 979nm)	2.7x(10-20)cm²

Specifications of Yb:CaGdAlO4：

Orientation	a or c
Standard Dopant concentration (at. %)	1%, 2%, 3%, 5%
Maximum length	50mm
Length tolerance, mm	+0.5 / -0.2
Diameter tolerance, mm	+/-0.1
Parallelism	< 30”
Perpendicularity	< 15’
Surface quality	10/5
Coating	AR-coated

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