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首页> 外文会议>SPIE Conference on High-Power Diode Laser Technology >970-nm ridge waveguide diode laser bars for high power DWBC systems
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970-nm ridge waveguide diode laser bars for high power DWBC systems

机译：970-NM脊波导二极管激光器，用于高功率DWBC系统

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摘要

Diode lasers are key components in material processing laser systems. While mostly used as pump sources for solid state or fiber lasers, direct diode laser systems using dense wavelength multiplexing have come on the market in recent years. These systems are realized with broad area lasers typically, resulting in beam quality inferior to disk or fiber lasers. We will present recent results of highly efficient ridge waveguide (RW) lasers, developed for dense-wavelength-beam-combining (DWBC) laser systems expecting beam qualities comparable to solid state laser systems and higher power conversion efficiencies (PCE). The newly developed RW lasers are based on vertical structures with an extreme double asymmetric large optical cavity. Besides a low vertical divergence these structures are suitable for RW-lasers with (10 μm) broad ridges, emitting in a single mode with a good beam quality. The large stripe width enables a lateral divergence below 10° (95 % power content) and a high PCE by a comparably low series resistance. We present results of single emitters and small test arrays under different external feedback conditions. Single emitters can be tuned from 950 nm to 975 nm and reach 1 W optical power with more than 55 % PCE and a beam quality of M~2 < 2 over the full wavelength range. The spectral width is below 30 pm FWHM. 5 emitter arrays were stabilized using the same setup. Up to now we reached 3 W optical power, limited by power supply, with 5 narrow spectral lines.
机译：二极管激光器是材料处理激光系统中的关键部件。虽然主要用作固态或纤维激光器的泵源，但近年来，使用密集波长复用的直接二极管激光系统已经在市场上进行。这些系统通常通过宽面积激光器实现，导致光束质量不如盘或光纤激光器。我们将在最近的最近的高效岭波导（RW）激光器的结果，用于致密波长梁组合（DWBC）激光系统，期望与固态激光系统和更高的功率转换效率（PCE）相当的光束质量。新开发的RW激光器基于具有极端双不对称的大光学腔的垂直结构。除了低垂直发散之外，这些结构适用于具有（10μm）宽脊的RW-Lasers，以良好的光束质量发射单个模式。大条纹宽度使横向发散低于10°（95％的功率含量）和高PCE，通过相对低串联电阻。我们在不同的外部反馈条件下提供单个发射器和小型测试阵列的结果。单个发射器可以从950nm到975nm调谐，并在全波长范围内达到超过55％的PCE和M〜2 <2的光束质量。光谱宽度低于30 PM FWHM。使用相同的设置稳定5个发射器阵列。到目前为止，我们达到了3 W光功率，受电源限制，具有5条窄谱线。

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