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2014 | 1 | 1 |

Article title

GPC: Recent developments


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Generalized Phase Contrast (GPC) is an efficient
method for generating speckle-free contiguous optical distributions.
It has been used in applications such as optical
manipulation, microscopy, optical cryptography and
more contemporary biological applications such as twophoton
optogenetics or neurophotonics.Among its diverse
applications, simple efficient shapes for illumination or
excitation happen to have the biggest potential use beyond
the research experiments. Hence, we preset recent
GPC developments geared towards these applications.We
start by presenting the theory needed for designing an optimized
GPC light shaper (GPC LS). A compact GPC LS implementation
based on this design is then used to demonstrate
the GPC LS’s benefits on typical applications where
lasers have to be shaped into a particular pattern. Both
simulations and experiments show ~80% efficiency, ~3x
intensity gain and ~90% energy savings. As an application
example,we show how computer generated hologram
reconstruction can be up to three times brighter or how
the number of optical spots can be multiplied threefold
while maintaining the brightness. Finally, to demonstrate
its potential for biomedical multispectral applications, we
demonstrate efficient light shaping of a supercontinuum
laser over the visible wavelength range.








Physical description


11 - 3 - 2015
11 - 6 - 2015
25 - 3 - 2015


  • DTU Fotonik, Dept.
    Photonics Engineering, Ørsted Plads 343, Technical University of
    Denmark, DK-2800 Kgs. Lyngby, Denmark
  • DTU Fotonik, Dept.
    Photonics Engineering, Ørsted Plads 343, Technical University of
    Denmark, DK-2800 Kgs. Lyngby, Denmark
  • DTU Fotonik, Dept.
    Photonics Engineering, Ørsted Plads 343, Technical University of
    Denmark, DK-2800 Kgs. Lyngby, Denmark
  • DTU Fotonik, Dept.
    Photonics Engineering, Ørsted Plads 343, Technical University of
    Denmark, DK-2800 Kgs. Lyngby, Denmark
  • DTU Fotonik, Dept.
    Photonics Engineering, Ørsted Plads 343, Technical University of
    Denmark, DK-2800 Kgs. Lyngby, Denmark


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