Journal
APPLIED OPTICS
Volume 50, Issue 21, Pages 4005-4010Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.50.004005
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Institute for Photonic Innovations (CIPI)
- Fonds quebecois de la recherche sur la nature et les technologies (FQRNT)
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A deformable mirror made of a magnetic liquid has been used to produce conical surfaces with sub-wavelength (lambda/4) accuracy. The surface profile of the liquid mirror is controlled by 91 small magnetic coils. The mirror exhibits a linear response with respect to the currents driving the coils, and it allows for real-time changes of its surface profile. The magnetic liquid deformable mirror has been used to produce reflected beams having a conical wavefront; the propagation of the reflected beams was verified to be consistent with that of Bessel beams in the near and far field. The large dynamic range of such a deformable mirror has made it possible to generate Bessel beams with a broad range of beam parameters. (c) 2011 Optical Society of America
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