Diffraction Efficiency Characteristics for MEMS-Based Phase-Only Spatial Light Modulator with Nonlinear Phase Distribution

Ketchum, Remington S.; Blanche, Pierre Alexandre

doi:10.3390/photonics8030062

Cited by 21 publications

(15 citation statements)

References 21 publications

(28 reference statements)

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“…For a hologram with plenty of information channels, switching the ADKs can even lead to the presentation of the refreshed information at different terminals. It provides a possibility to parallelly extract and distribute information encoded in many OAM channels to multiple locations at one time with light in a short range, just like the scenery described by the wireless communication system, so called Lifi 50 . In this way, our protocol based on the cross convolution theorem can boost the capacity for information processing which has the potential to be extended to other applications such as construction of a high-capacity short-range optical communication system.…”

Section: Discussionmentioning

confidence: 99%

100 Hertz frame-rate switching three-dimensional orbital angular momentum multiplexing holography via cross convolution

Meng¹,

Hua²,

Cheng³

et al. 2022

OES

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The orbital angular momentum (OAM) of light has been implemented as an information carrier in OAM holography. Holographic information can be multiplexed in theoretical unbounded OAM channels, promoting the applications of optically addressable dynamic display and high-security optical encryption. However, the frame-rate of the dynamic extraction of the information reconstruction process in OAM holography is physically determined by the switching speed of the incident OAM states, which is currently below 30 Hz limited by refreshing rate of the phase-modulation spatial light modulator (SLM). Here, based on a cross convolution with the spatial frequency of the OAM-multiplexing hologram, the spatial frequencies of an elaborately-designed amplitude distribution, namely amplitude decoding key, has been adopted for the extraction of three-dimensional holographic information encoded in a specific OAM information channel. We experimentally demonstrated a dynamic extraction frame rate of 100 Hz from an OAM multiplexing hologram with 10 information channels indicated by individual OAM values from -50 to 50. The new concept of cross convolution theorem can even provide the potential of parallel reproduction and distribution of information encoded in many OAM channels at various positions which boosts the capacity of information processing far beyond the traditional decoding methods. Thus, our results provide a holographic paradigm for high-speed 3D information processing, paving an unprecedented way to achieve the high-capacity short-range optical communication system.

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Section: Discussionmentioning

confidence: 99%

100 Hertz frame-rate switching three-dimensional orbital angular momentum multiplexing holography via cross convolution

Meng¹,

Hua²,

Cheng³

et al. 2022

OES

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show abstract

“…In addition, the phase levels are not equally distributed across the range of 0 to 2π but are distributed rather non-uniformly. In Figure 2a, the solid line plots the mechanical displacement of MEMS pixels of sixteen phase levels [16]. The maximum displacement of 100% modulates phase in 2π at a wavelength of 633 nm.…”

Section: Effect Of Non-linearly Distributed Phase Levels For Quasi-co...mentioning

confidence: 99%

Diffraction Efficiency of MEMS Phase Light Modulator, TI-PLM, for Quasi-Continuous and Multi-Point Beam Steering

et al. 2022

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The recent development of the Micro Electromechanical System (MEMS) Phase Light Modulator (PLM) enables fast laser beam steering for lidar applications by displaying a Computer-Generated Hologram (CGH) without employing an iterative CGH calculation algorithm. We discuss the application of MEMS PLM (Texas Instruments PLM) for quasi-continuous laser beam steering by deterministically calculated CGHs. The effect on the diffraction efficiency of PLM non-equally spaced phase levels was quantified. We also address the CGH calculation algorithm and an experimental demonstration that steered and scanned the beam into multiple regions of interest points, enabling beam steering for lidar without sequential raster scanning.

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“…For an even faster refreshing rate, a contender is the Texas Instruments DLP, that has a refreshing rate of up to 20 kHz. Texas Instruments is also developing a micro-electro mechanical system (MEMS) capable of modulating the phase of the laser beam [ 96 , 97 ]. Such a device, used for holographic printing, would have the advantages of being able to make the image, focus the beam, and scan the material, all at the same time.…”

Section: Photorefractive-based 3d Displaymentioning

confidence: 99%

Review of Organic Photorefractive Materials and Their Use for Updateable 3D Display

Blanche

Peyghambarian

2021

Materials

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Photorefractive materials are capable of reversibly changing their index of refraction upon illumination. That property allows them to dynamically record holograms, which is a key function for developing an updateable holographic 3D display. The transition from inorganic photorefractive crystals to organic polymers meant that large display screens could be made. However, one essential figure of merit that needed to be worked out first was the sensitivity of the material that enables to record bright images in a short amount of time. In this review article, we describe how polymer engineering was able to overcome the problem of the material sensitivity. We highlight the importance of understanding the energy levels of the different species in order to optimize the efficiency and recording speed. We then discuss different photorefractive compounds and the reason for their particular figures of merit. Finally, we consider the technical choices taken to obtain an updateable 3D display using photorefractive polymer. By leveraging the unique properties of this holographic recording material, full color holograms were demonstrated, as well as refreshing rate of 100 hogels/second.

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Diffraction Efficiency Characteristics for MEMS-Based Phase-Only Spatial Light Modulator with Nonlinear Phase Distribution

Cited by 21 publications

References 21 publications

100 Hertz frame-rate switching three-dimensional orbital angular momentum multiplexing holography via cross convolution

100 Hertz frame-rate switching three-dimensional orbital angular momentum multiplexing holography via cross convolution

Diffraction Efficiency of MEMS Phase Light Modulator, TI-PLM, for Quasi-Continuous and Multi-Point Beam Steering

Review of Organic Photorefractive Materials and Their Use for Updateable 3D Display

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