Chromium doped Forsterite
Cr : Mg2SiO4

Crystal properties

Chemical Formula

Cr:Mg2SiO4

Concentration

~3 – 6 x 1018 cm³

Melting Point

1890 °C

Density

3.22 g/cm³

Hardness (Mohs)

7

Thermal Expansion Coefficient

9.5 x 10-6

Thermal Conductivity

8 W /m /K (300 K)

Stimulated Emission Cross Section

1.44 x 10-19 cm-2

Relaxation Time of Terminal Lasing Level

<10 ps

Dadiative Lifetime

25 ms

Spontaneous Fluorescence

2.7 ms

Loss Coefficient

0.02 cm-1

Refractive Index

1.635

Spectroscopic and Laser Properties

Major Pumping Bands

850 – 1200 nm

600 – 850 nm

350 – 550 nm

Fluorescence Band

680 – 1400 nm

Room-temperature Fluorescence Lifetinme

~ 3 ms

Lasing Wavelenght (center)

1235 nm (pulsed)
1244 nm (CW)

Spectral Bandwith

30 nm (pulsed)
1244 nm (CW)

Typical Slope Efficiency

23 % (pulsed)
38 % (CW)

Tuning Range

1167 – 1345 nm

Gain Cross Section

~ 1.45 x 10-19 cm²