Journal
OPTICS LETTERS
Volume 43, Issue 1, Pages 22-25Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.000022
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Funding
- H European Research Council (ERC) [ERC-2016-StG-714560]
- Einstein Stiftung Berlin
- Deutsche Forschungsgemeinschaft (DFG) [EXC 257 NeuroCure]
- Human Frontier Science Program (HFSP)
- Alfried Krupp von Bohlen und Halbach-Stiftung
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The controlled modulation of an optical wavefront is required for aberration correction, digital phase conjugation, or patterned photostimulation. For most of these applications, it is desirable to control the wavefront modulation at the highest rates possible. The digital micromirror device (DMD) presents a cost-effective solution to achieve highspeed modulation and often exceeds the speed of the more conventional liquid crystal spatial light modulator but is inherently an amplitude modulator. Furthermore, spatial dispersion caused by DMD diffraction complicates its use with pulsed laser sources, such as those used in nonlinear microscopy. Here we introduce a DMD-based optical design that overcomes these limitations and achieves dispersion-free high-speed binary phase modulation. We show that this phase modulation can be used to switch through binary phase patterns at the rate of 20 kHz in two-photon excitation fluorescence applications. (C) 2017 Optical Society of America
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