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High-Brightness, Fiber-Coupled Pump Modules in Fiber Laser Applications

机译:光纤激光器应用中的高亮度,光纤耦合泵浦模块

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High-power, high-brightness, fiber-coupled pump modules enable high-performance industrial fiber lasers with simple system architectures, multi-kW output powers, excellent beam quality, unsurpassed reliability, and low initial and operating costs. We report commercially available (element™), single-emitter-based, 9xx nm pump sources with powers up to 130 W in a 105 μm fiber and 250 W in a 200 μm fiber. This combination of high power and high brightness translates into improved fiber laser performance, e.g., simultaneously achieving high nonlinear thresholds and excellent beam quality at kW power levels. Wavelength-stabilized, 976 nm versions of these pumps are available for applications requiring minimization of the gain-fiber length (e.g., generation of high-peak-power pulses). Recent prototypes have achieved output powers up to 300 W in a 200 μm fiber. Extensive environmental and life testing at both the chip and module level under accelerated and real-world operating conditions have demonstrated extremely high reliability, with innovative designs having eliminated package-induced-failure mechanisms. Finally, we report integrated Pump Modules that provide > 1.6 kW of fiber-coupled power conveniently formatted for fiber-laser pumping or direct-diode applications; these 19" rack-mountable, 2U units combine the outputs of up to 14 elements™ using fused-fiber combiners, and they include high-efficiency diode drivers and safety sensors.
机译:高功率,高亮度,光纤耦合泵浦模块使高性能工业光纤激光器具有简单的系统架构,多千瓦的输出功率,优异的光束质量,无与伦比的可靠性以及较低的初始和运行成本。我们报告了市售(element™),基于单发射器的9xx nm泵浦光源,在105μm光纤中功率高达130 W,在200μm光纤中功率高达250W。高功率和高亮度的这种结合转化为改善的光纤激光器性能,例如,同时在kW功率水平下实现了高非线性阈值和出色的光束质量。这些泵具有波长稳定的976 nm版本,可用于要求最小化增益光纤长度(例如,产生高峰值功率脉冲)的应用。最新的原型已在200μm的光纤中实现了高达300 W的输出功率。在加速和现实操作条件下,在芯片和模块级别的广泛环境和寿命测试已显示出极高的可靠性,其创新设计消除了封装引起的故障机制。最后,我们报告了集成的泵浦模块,这些泵浦模块提供了> 1.6 kW的光纤耦合功率,可方便地格式化以用于光纤激光泵浦或直接二极管应用;这些19英寸可机架安装的2U单元使用熔融光纤组合器将多达14个元素的输出组合在一起,并且包括高效二极管驱动器和安全传感器。

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