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Narrow-line, tunable, high-power, diode laser pump for DPAL applications

机译：用于DPAL应用的窄线，可调，高功率二极管激光泵

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摘要

We report on a high-power diode laser pump source for diode-pumped alkali lasers (DPAL), specifically rubidium alkali vapor lasers at 780nm, delivering up to 100W/bar with FWHM spectral line width of 0.06nm (～30GHz). This pump is based on a micro-channel water-cooled stack with collimation in both-axes. Wavelength-locking of the output spectrum allows absorption in one of the very narrow resonance lines of the atomic rubidium alkali vapor. To achieve these results, research was conducted to deliver the highest performance on all key components of the product from the diode laser bar which produces the optical power at 780nm to the external Bragg gratings which narrow the spectrum line width. We highlight the advancements in the epitaxy, device design, beam collimation, grating selection, alignment, tunability and thermal control that enable realization of this novel pump-source for DPALs. Design trade-offs will be presented.
机译：我们报道了一种用于二极管泵浦碱金属激光（DPAL）的高功率二极管激光泵浦光源，特别是在780nm波长下的alkali碱蒸气激光，其输出功率高达100W / bar，FWHM谱线宽度为0.06nm（〜30GHz）。该泵基于双通道准直的微通道水冷堆。输出光谱的波长锁定允许在原子rub碱蒸气的非常窄的共振线之一中吸收。为了获得这些结果，已进行了研究，以使产品的所有关键组件具有最高性能，从产生780nm光功率的二极管激光棒到缩小光谱线宽度的外部布拉格光栅。我们重点介绍了外延技术，器件设计，光束准直，光栅选择，对准，可调性和热控制方面的进展，这些进展使得能够实现这种新型的DPAL泵浦源。将提出设计权衡。

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