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首页> 外文会议>Solid State and Diode Laser Technology Review(SSDLTR 2004) >High power laser source with spectrally beam combined diode laser bars
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High power laser source with spectrally beam combined diode laser bars

机译：高功率激光源，带有光谱束组合二极管激光棒

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摘要

In this paper, we report about an external cavity diode laser that spectrally beam combines the outputs from seven diode bars to produce 26 Watts at 820nm. Beam combining is a scalable method for generating high-brightness beams, where the technique works by overlaying the outputs of many laser emitters into a single beam, while retaining the beam quality of each emitter. Our method, spectral beam combining (SBC), uses a dispersive laser cavity for beam combination. The cavity that we use, illustrated in Figure 1, is essentially a spectrometer that controls the wavelength of each emitter. Each diode bar contains 200 single-mode emitters. The transform mirror, which is equivalent to a collimating optic in a spectrometer, functions to collimate the output of each emitter, and ideally, to draw all of the emitter outputs to a common location at the grating. The grating is the beam combining element, where all emitter outputs follow a common trajectory between the grating and the output coupler. A slit is introduced to the beam-combined leg to ensure that emitters interact with the cavity individually, thereby suppressing crosstalk. This is necessary to achieve high beam quality.
机译：在本文中，我们报告了一种外腔二极管激光器，该激光器在光谱上结合了七个二极管棒的输出，从而在820nm处产生26瓦功率。光束合并是用于生成高亮度光束的可扩展方法，该技术通过将许多激光发射器的输出叠加到单个光束中来工作，同时保留每个发射器的光束质量。我们的方法，光谱光束合并（SBC），使用色散激光腔进行光束合并。我们使用的腔（如图1所示）实质上是控制每个发射器波长的光谱仪。每个二极管条包含200个单模发射器。转换镜相当于光谱仪中的准直光学镜，其作用是准直每个发射器的输出，理想情况下，将所有发射器的输出拉到光栅上的公共位置。光栅是光束组合元件，所有发射器的输出都遵循光栅和输出耦合器之间的共同轨迹。缝隙被引入到组合光束的支腿中，以确保发射器分别与空腔相互作用，从而抑制串扰。这是实现高光束质量所必需的。

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