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Related Experiment Videos

Micro-electro-mechanical system-based digitally controlled optical beam profiler.

Sarun Sumriddetchkajorn1, Nabeel A Riza

  • 1Nuonics, In., Orlando, Florida 32817, USA. sarun@notes.nectec.or.th

Applied Optics
|June 25, 2002
PubMed
Summary
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A novel optical beam profiler utilizes a 2-D digital micromirror device for fast, digital beam analysis. This technology enables versatile measurement techniques with high accuracy, demonstrating a low error rate for Gaussian beam profiling.

Area of Science:

  • Optics and Photonics
  • Optical Metrology

Background:

  • Accurate optical beam profiling is crucial for laser system characterization and performance optimization.
  • Traditional beam profiling methods can be slow, complex, or limited in their measurement capabilities.

Purpose of the Study:

  • To introduce and validate a new optical beam profiler based on a two-dimensional (2-D) digital micromirror device (DMD).
  • To demonstrate the versatility of the DMD-based profiler for various beam measurement techniques.

Main Methods:

  • Implementation of a 2-D DMD as the core component of the optical beam profiler.
  • Simulation of a 2-D moving knife-edge measurement using the DMD.
  • Experimental validation of the profiler's accuracy with a Gaussian beam.

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Main Results:

  • The DMD-based optical beam profiler exhibits fast speed, digital control, low polarization sensitivity, and wavelength independence.
  • Experimental results showed a small measurement error of 0.19% for the simulated 2-D moving knife-edge method.
  • The DMD allows for the realization of multiple beam profiling concepts, including scanning slit and variable aperture.

Conclusions:

  • The 2-D DMD is a viable and effective technology for advanced optical beam profiling.
  • This approach offers a flexible and accurate platform for diverse optical beam characterization tasks.
  • Future applications may involve other 2-D pixel arrays for specialized beam analysis.