Nonlinear Crystals


Nonlinear Crystals

Laser Crystals









  Cr:LiSAF & Cr:LiCAF

AO & EO Crystals

Optical Crystals

Chromium-Doped Forsterite Crystal (Cr: Mg2SiO4)

Cr: Forsterite crystal is a new tunable laser material that fills the spectral void in the near-IR region.  The tuning range covers the important spectral range from 1130nm to 1367nm, which provides a minimal dispersion in optical fibers.  The Cr: Forsterite laser eventually explores its niche applications for semiconductor characterization, eye-safe ranging, medical, industrial and scientific research.  Both pulsed, continuous-wave (CW) and fs laser operation have been obtained when pumped with 532, 578, 629 and 1064nm.  It can be also used as a passive Q-switch for solid state lasers, such as ruby laser, Alexandrite, Cr: LiSAF, etc.

Dream Lasers has developed the state of the art technology in growing the Cr: Forsterite crystal with the Czochralski method.  The standard Cr: Forsterite crystal with the dimensions of (3-10)(10-30)mm are steadily available.  Other specifications, AR-coatings can be provided to meet your specific requirements.

Physical, Thermal and Optical Properties
Chemical Formula Cr: Mg2SiO4
Structure Orthorhombic, Pbnm
Gain Cross Section ~210-19 cm2
Corresponding Coefficient =1.1, 1.5, 2.3cm-1@1064nm;
=8, 10, 12cm-1@733nm
Melting Point 1890
Density 3.22g/cm3
Mohs Hardness 7
Thermal Expansion Coefficient 9.510-6/K
Thermal Conductivity Gain Cross Section
Loss Coefficient <0.02 cm-1
Refractive Index 1.635
Surface damage threshold 9.5J/cm2 @ 6ns; 4.4J/cm2 @ 0.6ns

Spectroscopic and Laser Properties
Major Pumping Bands 850-1200, 600-850, 350-550nm
Fluorescence Band 680-1400nm
Room-temperature Fluorescence Lifetime ~3s
Lasing Wavelength (center) 1235nm (pulsed), 1244nm (CW)
Typical Slope Efficiency 23% (pulsed), 38% (CW)
Tuning range 1130-1367nm
Gain Cross Section ~210-19 cm2
Absorption Section ~1.310-19 cm2

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