Trela Natalia, Baker Howard J, Wendland Jozef J, Hall Denis R
School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, United Kingdom.
Opt Express. 2009 Dec 21;17(26):23576-81. doi: 10.1364/OE.17.023576.
A single optical component for a diode laser bar combines fast-axis smile and lens error correction with slow-axis collimation. Produced by laser-machining/polishing, it provides 0.9 mm focal length, 200 microm pitch slow-axis collimation on the same surface that corrects fast-axis errors. Custom fabrication enables fill-factor optimization for the 49 single-mode beams and gives parallel collimation with rms pointing errors of 3% and 6% of the far-field divergence for the fast- and slow-axis array respectively. Sub-micron pitch mismatch between the slow-axis lens and emitter arrays, and beam pointing changes by thermal expansion of the laser bar are detected.
一种用于二极管激光棒的单一光学元件，将快轴微笑和透镜误差校正与慢轴准直相结合。通过激光加工/抛光制成，它在同一表面上提供0.9毫米焦距、200微米间距的慢轴准直，同时校正快轴误差。定制制造可实现49个单模光束的填充因子优化，并分别为快轴和慢轴阵列提供均方根指向误差为远场发散3%和6%的平行准直。检测到慢轴透镜与发射器阵列之间的亚微米间距失配以及激光棒热膨胀引起的光束指向变化。
