High Damage Threshold Co: Spinel Crystals Passive Q-Switch Crystal

Introduction:

Co2+: MgAl2O4 is a relatively new saturable absorption passive Q-switch material, suitable for 1.2～1.6μm laser emission, especially suitable for the 1.54μm eye-safe Er glass laser. Passive Q-switching or saturable absorber can generate high-power laser pulses without using electro-optic Q switching, which can effectively reduce the size of the device and avoid the use of high-voltage power.

Spinel is a hard, stable crystal that can be polished to the desired index. Cobalt particles replace magnesium ions without additional charge compensation. In the 1.3μm attachment, it has a particularly high excited-state absorption cross-section (3.5×10-19　cm2), so that the flash lamp and the laser-pumped Er glass laser do not need to be focused in the cavity.

Features:

• Chemical stability
• UV resistant
• Good thermal conductivity
• High damage threshold (> 500 MW/cm2)

Applications

• Passive Q-switch for Er: Glass lasers @1,54 µm
• Laser Ranging
• Medical Applications

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