Demonstration of high pointing accuracy, dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate

Natalia Trela, Howard J. Baker, Jozef J. Wendland, Denis R. Hall

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present our work on a single optical component that combines fast-axis smile and lens error correction with slowaxis collimation, produced with a laser-cut phase-plate technique. Customized focal length of slow-axis lenses allows optimization of fill-factor of diode laser bars. In this paper we report on excellent beam properties obtained for a 49- single mode emitter array, 975 nm bar providing 30W cw output, with RMS pointing error of 3% and 6% of far-field divergence in fast- and slow-axis, respectively. We observed a pitch mismatch of 0.03% between the slow-axis lens array, with emitter pointing clearly affected by chip thermal expansion. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Original languageEnglish
Title of host publicationHigh-Power Diode Laser Technology and Applications VIII
Volume7583
DOIs
Publication statusPublished - 2010
EventFiber Lasers VII: Technology, Systems, and Applications - San Francisco, CA, United States
Duration: 25 Jan 201028 Jan 2010

Conference

ConferenceFiber Lasers VII: Technology, Systems, and Applications
CountryUnited States
CitySan Francisco, CA
Period25/01/1028/01/10

Keywords

  • Diode laser arrays
  • Microoptics
  • Slow-axis collimation
  • Smile correction

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    Trela, N., Baker, H. J., Wendland, J. J., & Hall, D. R. (2010). Demonstration of high pointing accuracy, dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate. In High-Power Diode Laser Technology and Applications VIII (Vol. 7583) https://doi.org/10.1117/12.842197