High CW wallplug efficiency 1.5 micron-emitting diode lasers
High CW wallplug efficiency 1.5 micron-emitting diode lasers
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高 CW 电插效率 1.5 微米发射二极管激光器
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
L. Mawst
中科院分区：
文献类型：
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作者：
D. Botez;T. Garrod;L. Mawst
仅提供摘要表格。泵浦固态激光器、直接二极管成像应用和人眼安全的自由空间光通信需要高功率、长波长、发射约1.5μm的InP基二极管激光器。光学系统显著受益于具有高壁塞效率(WPE)、高亮度和降低温度敏感度的二极管激光器。用于光纤通信的1.5μm发射低功率(≤20 mW)激光器的早期工作表明，WPE值高达35%。目前，商用的宽域半导体激光器在高(~1-2 W)CW功率水平下发射约1.5μm，其最大WPE值约为20%。因此，80%的外加电能以热的形式损失。在WPE值约为20%的情况下，设计为产生100 W光功率的条形堆需要大约500 W的电源；因此，产生400 W的余热。将最大WPE从20%增加到50%，所需电力减少到原来的1/2.5。除了与激光冷却相关的节能外，这一好处还将转化为二极管泵浦光纤激光器和手持军事目标监视和远程捕获系统的重量和成本的显著降低。我们用系统的方法分析了在1.5-1.55μm范围内发射的半导体激光器的功率损失机制，并对器件进行了优化以获得较高的CW WPE值。结果表明，对于1.53μm的激光器，在室温下，在连续工作条件下，我们获得了50%的壁塞效率。
Summary form only given. High-power, long-wavelength InP-based diode lasers emitting around 1.5 μm are needed for pumping solid-state lasers, direct-diode imaging applications, and eye-safe free-space optical communications. Optical systems significantly benefit from diode lasers with high wallplug efficiency (WPE), high brightness and reduced temperature sensitivity. Early work on 1.5 μm-emitting low-power (≤ 20 mW) lasers for fiber-optical optical communications has demonstrated WPE values as high as 35%. Currently, commercially available, broad-area diode lasers emitting around 1.5 μm have maximum WPE values around 20% at high (~ 1-2 W) CW power levels. Thus, 80% of the applied electrical power is lost as heat. With a WPE value around 20%, a bar stack designed to produce 100 W of optical power requires approximately a 500 W power supply; thus, generates 400 W of waste heat. Increasing the maximum WPE from 20% to 50% results in a 2.5 times reduction in required electrical power. This benefit, in addition to the power savings associated with laser cooling, would translate into a significant reduction in weight and cost for diode-pumped fiber lasers and hand-held military target-surveillance and distance-acquisition systems. We have taken a systematic approach for analyzing the power-loss mechanisms in diode lasers emitting in the 1.50-1.55 μm range, and then optimized the devices for high CW WPE values. As a result, we have achieved 50% wallplug efficiency at room temperature, under CW operating conditions, for lasers emitting at 1.53 μm.