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- W2023409920 abstract "ABSTRACT An analytic model for the cw diode pumped alkali laser is developed by considering the longitudinally averaged number densities of the ground 2 S 1/2 and first excited 2 P 3/2 , and 2 P 1/2 states. The pump intensity to reach threshold requires fully bleaching the pump transition and exceeding optical losses, typically about 200 Watts/cm 2 . Slope efficiency depends critically on the fraction of incident photons absorbed and the overlap of pump and resonator modes, approaching the quantum efficiency of 0.95 0.98. For marginal cavity transmission losses, peak performance is achieved for low output coupling. For efficient operation, the collisional relaxation betw een the two upper levels should be fast to prevent bottle-necking. By assuming a statistical distri bution between the upper two levels, the limiting analytic solution for the quasi-two level system is achieved. For properly designed gain conditions, the quasi two level solution is usually achievable and represents ideal performance. Keywords: optically-pumped laser, saturation, efficiency, rubidium, analytic model" @default.
- W2023409920 created "2016-06-24" @default.
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- W2023409920 date "2010-02-11" @default.
- W2023409920 modified "2023-09-23" @default.
- W2023409920 title "Extended saturation analysis and analytical model of diode-pumped alkali lasers" @default.
- W2023409920 doi "https://doi.org/10.1117/12.842330" @default.
- W2023409920 hasPublicationYear "2010" @default.
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