Generalized Phase Contrast (GPC) is an efficient method for generating speckle-free contiguous optical distributions useful in diverse applications such as static beam shaping, optical manipulation and recently for excitation in two-photon optogenetics. To fully utilize typical Gaussian lasers in such applications, we analytically derive conditions for photon efficient light shaping with GPC. When combined with the conditions for optimal contrast developed in our previous works, our analysis further simplifies GPC’s implementation. The results of our analysis are applied to practical illumination shapes, such as a circle and different rectangles commonly used in industrial or commercial applications. We also show simple and efficient beam shaping of arbitrary shapes geared towards biophotonics research and other contemporary applications. Assessment of the energy savings when comparing to conventional amplitude masking show that up to ~93% of typical energy losses are saved.
|Publication status||Published - 2014|
|Event||Neurophotonics seminars - Paris Descartes University , Paris, France|
Duration: 4 Mar 2014 → 4 Mar 2014
|Location||Paris Descartes University|
|Period||04/03/2014 → 04/03/2014|