Topic
Spatial light modulator
About: Spatial light modulator is a research topic. Over the lifetime, 9043 publications have been published within this topic receiving 130143 citations.
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26 Nov 2002
TL;DR: In this article, a projection system, a spatial light modulator, and a method for forming a MEMS device are disclosed, where two substrates are bonded at the wafer level after depositing a getter material and/or solid or liquid lubricant on one or both of the wafers if desired.
Abstract: A projection system, a spatial light modulator, and a method for forming a MEMS device are disclosed. The spatial light modulator can have two substrates bonded together with one of the substrates comprising a micro-mirror array. The two substrates can be bonded at the wafer level after depositing a getter material and/or solid or liquid lubricant on one or both of the wafers if desired. In one embodiment of the invention, one of the substrates is a light transmissive substrate and a light blocking layer that is preferably a light absorbing layer is provided on the light transmissive substrate to selectively block light from passing through the substrate. The light blocking layer can be formed as a pattern, such as a grid or strips for blocking light from entering gaps between adjacent micro-mirrors.
55 citations
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TL;DR: The utility of the method uses a Sagnac interferometer that incorporates a spatial light modulator to combine beams that possess oppositely charged phase vortices in order to achieve the desired polarization vortex is demonstrated.
Abstract: We present a method for producing laser beams of nonuniform polarization where the polarization direction rotates on a trajectory about the beam propagation direction. Our method uses a Sagnac interferometer that incorporates a spatial light modulator to combine beams that possess oppositely charged phase vortices in order to achieve the desired polarization vortex. We demonstrate the utility of our method by producing polarization vortices characterized by a fractional index, and we compare the results with calculations of the expected fields.
55 citations
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TL;DR: In this paper, a simple imaging system, together with complex semidefinite programming, is used to generate the transmission matrix (TM) of a multimode fiber, which is then modulated to induce strong mode interference at the fiber output.
Abstract: A simple imaging system, together with complex semidefinite programming, is used to generate the transmission matrix (TM) of a multimode fiber. Once the TM is acquired, we can modulate the phase of the input signal to induce strong mode interference at the fiber output. The optical design does not contain a reference arm, no internal reference signal is used, and no interferometric measurements are required. We use a phase-only spatial light modulator to shape the profile of the propagating modes, and the output intensity patterns are collected. The semidefinite program uses a convex optimization algorithm to generate the TM of the optical system using intensity only measurements. This simple, yet powerful, method can be used to compensate for modal dispersion in multimode fiber communication systems. It also yields great promise for the next generation biomedical imaging, quantum communication, and cryptography.
55 citations
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TL;DR: This work proposes a highly efficient approach to generating multihelix beams that contain more than one helical mode, and the power distribution over helical modes is adjustable.
Abstract: We propose a highly efficient approach to generating multihelix beams that contain more than one helical mode, and the power distribution over helical modes is adjustable. A multihelix beam embedded with three collinear helical modes is demonstrated by use of a spatial light modulator.
55 citations
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24 Apr 2007TL;DR: In this paper, a pixellated spatial light modulator and phase mask can be implemented in a liquid crystal SLM (neumatic, ferroelectric, or other), in a DMD SLM, in a magneto-optical SLM or in any other suitable manner.
Abstract: A holographic data storage system (20) that includes a write head that includes a pixellated spatial light modulator (30) and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through The phase variation can be changed over time in a random, pseudo-random, or predetermined fashion The spatial light modulator and phase mask can be implemented in a liquid crystal SLM (neumatic, ferroelectric, or other), in a DMD SLM, in a magneto-optical SLM, or in any other suitable manner
55 citations