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Extended field-of-view and increased-signal 3D holographic illumination with time-division multiplexing

  • Samuel J. Yang
  • , William E. Allen
  • , Isaac Kauvar
  • , Aaron S. Andalman
  • , Noah P. Young
  • , Christina K. Kim
  • , James H. Marshel
  • , Gordon Wetzstein
  • , Karl Deisseroth

Research output: Contribution to journalArticlepeer-review

Abstract

Phase spatial light modulators (SLMs) are widely used for generating multifocal three-dimensional (3D) illumination patterns, but these are limited to a field of view constrained by the pixel count or size of the SLM. Further, with two-photon SLM-based excitation, increasing the number of focal spots penalizes the total signal linearly - requiring more laser power than is available or can be tolerated by the sample. Here we analyze and demonstrate a method of using galvanometer mirrors to time-sequentially reposition multiple 3D holograms, both extending the field of view and increasing the total time-averaged two-photon signal. We apply our approach to 3D two-photon in vivo neuronal calcium imaging.

Original languageEnglish (US)
Pages (from-to)32573-32581
Number of pages9
JournalOptics Express
Volume23
Issue number25
DOIs
StatePublished - Dec 14 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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