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Passive Q-switch crystals
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Passive Q-switch crystals

Passive Q-switch crystals or saturable absorbers are used as the laser resonator quality modulators in a passively Q-switched laser instead of an electrically controlled modulator.

Typically, these absorber materials have a low saturation fluence (saturation energy per unit area), and their use in focused beams can further reduce the saturation energy (saturation fluence times beam area).

4Lasers is developing different passive Q-switch crystal hosts and ion dopant combinations for research and industrial applications.

We have capabilities to grow various dopant concentration of these Q-switch crystals: