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gallium selenide (GaSe) crystal / non-linear optical / laser

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gallium selenide (GaSe) crystal gallium selenide (GaSe) crystal


  • Crystal type:

    gallium selenide (GaSe)

  • Technical characteristics:

    non-linear optical

  • Use:



Transparency range 650-18000nm
Nonlinear coefficients d22 = 54 pm/V
Orientation accuracy of cut angle 30MW/cm2 for 10ns pulses @ 1064 nm

GaSe has been successfully used for:

efficient SHG of CO 2 laser (up to 9% conversion);
for SHG of pulsed CO, CO2 and chemical DF-laser (l = 2.36 mkm) radiation;
upconversion of CO and CO2 laser radiation into the visible range; infrared pulses generation via difference frequency mixing of Neodymium and infrared dye laser or (F-)-centre laser pulses;
OPG light generation within 3.5 - 18 mkm.

It is impossibile to cut crystals for certain phase matching angles because of material structure (cleave along (001) plane) limiting areas of applications.