Small-signal gain dependence on active medium length and axial thermal profile in metal-vapor lasers
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We measure the small-signal gain coefficient g0 of a gold vapor laser for a 627.8 nm transition through the implementation of a discharge-driven oscillator-amplifier configuration. We study the gain dependence on the length of the laser active medium. In addition, we measure the output power of a copper-vapor laser for two different thermal insulator distributions and simulate the thermal-length profile to determine the effective length of the active medium. We show that the small-signal gain coefficient depends on the effective length of the active medium and do not depend on the physical (actual) length of the active medium.
Keywordsmetal-vapor laser small-signal gain thermal-length profile
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