大功率激光二极管及二极管棒（High-power Laser Diodes and Laser Diode Bars）

wolfgangwoo · 发表于 2003-3-15 22:12:00

[这个贴子最后由wolfgangwoo在 2003/03/15 02:29pm 第 3 次编辑]

At present high-power laser diodes are pushing laser technology forward to new state-of-the-art in modern industry. They become the key devices for laser systems used in material processing, pumping for solid-state lasers and medical applications.In the early 1990s, the LD bars,of which the power and life time reached more than 20 W and 10000 h, opened up potential for volume applications.The process was achieved mainly by substantial improvements of the GaAs crystal-growth technology, supplying subatrates of low defect density as well as in the epitaxial growth process of AlGaInAs and GaInAsP layers on GaAs.
The adavantage of laser systems based on high-power laser diodes are compared to lamp pumping or gas discharge for generating coherent light, are smaller size, the higher electrical-to-optical convension effiency, the simple power and cooling supply, and the higher reliability.1. high-power LDs are likely replace the lamps in sold-state laser systems. 2. Many high-powe LDs can be easily assembled to get the desired output power of direct-diode application.3. In applications demanding higher beam quality, replacement of solid-state laser systems by sophisticated high-power LD stacks is envaged.

zgzxb · 发表于 2003-3-16 03:41:00

高功率半导体激光器阵列又称为二极管激光器堆图1（我不知道如何粘图）所示，它是采用层叠方式，在垂直方向上将一维线阵列器件堆积叠加起来构成。由于发光面积大，便于获得更大功率的激光输出。目前这种器件的功率水平已经达到了千瓦级，据报道最大的输出功率已达到了50kw。例如一个发光面积为0.4×1.2mm，输出功率在1Kw左右。功率密度达到200kw/cm2。随着阵列堆的进一步增加、制冷技术和耦合技术的不断提高、端面镀增透膜和高反膜的质量的进一步改善等，将会得到更高的功率输出和光束模式。这对激光材料加工、激光印刷工业、泵浦固体激光器、激光医学等将具有重要的意义。
大家可以关于这个话题讨论一下。

wolfgangwoo · 发表于 2003-3-16 18:46:00

The LD bar for wavelength at 808 nm

zgzxb · 发表于 2003-3-16 18:56:00

功率有多大阿？？？？

wolfgangwoo · 发表于 2003-3-16 19:03:00

单个bar30-50W

zgzxb · 发表于 2003-3-16 19:06:00

从图上看好像你们一个bar出来的光没有整形吧？？

wolfgangwoo · 发表于 2003-3-16 19:16:00

在bar前有个柱面透镜对快轴方向上的光进行准直。

wolfgangwoo · 发表于 2003-3-16 19:19:00

LD bar

zgzxb · 发表于 2003-3-16 19:26:00

这几幅图不错阿！
哪么求请老兄介绍一下不同的光束耦合和整形技术吧？？？
先谢了！！

seawind · 发表于 2003-3-17 04:45:00

你的图片当中，diode 有几条bar,前面的柱镜是针对整形过的单bar还是整形後的多bar?

wolfgangwoo · 发表于 2003-3-17 16:35:00

下面引用由seawind在 2003/03/16 08:45pm 发表的内容：
你的图片当中，diode 有几条bar,前面的柱镜是针对整形过的单 ...

图片中显示的是单个bar,柱面镜是对光束在快轴（也就是垂直于p-n结）方向进行准直。

wolfgangwoo · 发表于 2003-3-17 22:48:00

LD的介绍

大功率激光二极管及二极管棒（High-power Laser Diodes and Laser Diode Bars）