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Passive Q-switch crystals
Passive Q-switch crystals (saturable absorbers) are used as laser resonator quality modulators in passively Q-switched lasers instead of an electrically controlled modulator. Typically, these saturable absorbers are characterized by a low saturation fluence (saturation energy per unit area) and their use with converging beams can further reduce the saturation energy (saturation fluence times beam area).
4Lasers develops and supplies different passive Q-switch crystal hosts and ion dopant combinations for research and industrial applications, therefore custom solutions are available upon request.