Picosecond evolution of pulsed and CW alkali vapor lasers: laser oscillation buildup

Optics Express
Binglin ShenJunle Qu

Abstract

Investigation of the kinetic principle of a diode-pumped alkali vapor laser (DPAL) is key to achieve multifunctional DPALs. In this work, we propose a spatiotemporal model, which combines the time-dependent rate equations of population densities and propagation equations of energies to study the dynamic processes from turn-on to steady-state in DPALs. Time evolution of population densities and pump and laser intensity are resolved on a picosecond time scale to study the build-up process of laser oscillations. For nanosecond-pulse pumping, we obtain a laser pulse of 1.6 ns and a delay time of 2.6 ns at an incident pulse width of 2 ns. This pulse can be stretched by increasing the pump pulse width and delayed by applying a more extended cavity. For CW operation, spiking and relaxation oscillations resulting from a dynamic balance of gain and losses are demonstrated to be much faster than other types of lasers.

References

Feb 24, 1992·Physical Review Letters·R J ThompsonH J Kimble
Dec 19, 2003·Optics Letters·William F KrupkeStephen A Payne
Mar 4, 2008·Optics Letters·Boris V ZhdanovR J Knize
Dec 23, 2014·Optics Letters·M K ShafferR J Knize
Sep 15, 2015·Optics Express·Ilya AuslenderRandall J Knize
Dec 25, 2015·Optics Express·Wei HuangXiaochuan Lu
Aug 25, 2016·Optics Express·B V ZhdanovR J Knize

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