Emerging scientific and industrial applications of digital holography: an overview

Kumar, Raj; Dwivedi, Gaurav

doi:10.1088/2631-8695/acf97e

Cited by 11 publications

(4 citation statements)

References 137 publications

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“…In the last few decades, photonics has advanced significantly relative to conventional electronics, offering faster data transmission, reduced energy consumption, and increased bandwidth [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Innovations in photonic devices, such as optical switches and multiplexers, have revolutionized communication technologies, paving the way for more efficient and high-speed data processing.…”

Section: Introductionmentioning

confidence: 99%

A new scheme of all-optical 2:1 multiplexer (MUX) and MUX-based combinational circuits using nonlinear kerr-type materials

Das,

Pahari

2024

Eng. Res. Express

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Optoelectronics, often known as photon-based electronics, is well recognised for being more effective than conventional electronics for communication. To create a superfast computer, several devices have previously been developed in the field of all optical computing systems. Here, we have put forth an all-optical 2:1 multiplexer with the usage of nonlinear material exhibiting a strong ac Kerr effect and 2:1 Multiplexer (MUX) based all optical -photonic switches - NOT, OR, AND, NAND, NOR etc. The sole method for building combinational logic circuits is to utilise MUX. This work is made simpler by the Shannon decomposition theorem than by other approaches. In this study, input and output are expressed as the presence of a light signal with a prefixed intensity as binary 1 and the absence of a light signal as binary 0 using an intensity-based all-optical device and positive logic. Since the system is entirely optical, our current design enables very-high speed (terahertz) computation, which is not possible with typical semiconductor electronic switches. Validation through mathematical computations-based PYTHON simulations establishes the efficacy of the proposed approach. This research holds promise for applications in industrial and commercial contexts, offering enhanced performance and versatility.

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Section: Introductionmentioning

confidence: 99%

A new scheme of all-optical 2:1 multiplexer (MUX) and MUX-based combinational circuits using nonlinear kerr-type materials

Das,

Pahari

2024

Eng. Res. Express

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“…Lensless DHI is a method which numerically reconstructs optical fields based on diffraction of light, and therefore, does not rely on optical lenses to retrieve this information. The ability to mathematically reconstruct a field at any given distance gives rise to special measurement capabilities that are of interest for in-situ metrology and industrial applications (Kumar and Dwivedi, 2023). Multiple components can be inspected at various WD's instantaneously, and advanced methods have been implemented for extended capabilities such as 3D and tomographic measurements using multiplexed holography (Khaleghi et al, 2015a;Khaleghi et al, 2015b;Mustafi and Latychevskaia, 2023).…”

Section: Introductionmentioning

confidence: 99%

High-resolution imaging for in-situ non-destructive testing by quantitative lensless digital holography

Ruiz-Cadalso,

Furlong

2024

Front. Photon.

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Quantitative imaging technologies for in-situ non-destructive testing (NDT) demand high-resolution, wide-field, and stable metrology capabilities. Moreover, live processing and automation are vital for real-time quality control and inspection. Conventional methods use complex optical setups, resulting in large, immobile systems which can solely operate within controlled environmental conditions due to temporal instabilities, rendering them unsuitable for in-situ measurements of micro-to nano-scale physical phenomena. This article delves into the multiphysics application of lensless digital holography, emphasizing its metrological capacity for various in-situ scenarios, while acknowledging and characterizing the differing constraints imposed by various physical phenomena, both transient and steady-state. The digital reconstruction of holograms is computed in real-time, and numerical focusing capabilities allow for instantaneous retrieval of the optical phase at various working distances without the need of complex optical setups, making lensless digital holography well-suited for in-situ quantitative imaging under various types of environments. Current NDT capabilities are demonstrated, including high-resolution and real-time reconstructions, simultaneous measurements for comparative metrology, and practical applications ranging from vibrations and acoustics to thermo-mechanics. Furthermore, methodologies to enhance overall metrology capabilities are exploited, addressing the study of existing physical phenomena, thereby expanding the applicability of holographic techniques across diverse industrial sectors.

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“…Digital holography (DH) is a versatile, 3D imaging technique that can precisely measure the amplitude and phase of light by utilizing the interference phenomena [1][2][3][4][5][6]. Beyond conventional systems, access to complex amplitude in digital form has a wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

Dual Field-of-View Off-Axis Spatially Multiplexed Digital Holography Using Fresnel’s Bi-Mirror

Pensia,

Kumar,

Kumar

2024

Sensors

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Digital holography (DH) is an important method for three-dimensional (3D) imaging since it allows for the recording and reconstruction of an object’s amplitude and phase information. However, the field of view (FOV) of a DH system is typically restricted by the finite size of the pixel pitch of the digital image sensor. We proposed a new configuration of the DH system based on Fresnel’s bi-mirror to achieve doubling the camera FOV of the existing off-axis DH system which leveraged single-shot acquisition and a common-path optical framework. The dual FOV was obtained by spatial frequency multiplexing corresponding to two different information-carrying beams from an object. Experimental evidence of the proposed dual FOV-DH system’s viability was provided by imaging two different areas of the test object and an application to surface profilometry by measuring the step height of the resolution chart which showed excellent agreement with an optical profiler. Due to the simple configuration, the proposed system could find a wide range of applications, including in microscopy and optical metrology.

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Emerging scientific and industrial applications of digital holography: an overview

Cited by 11 publications

References 137 publications

A new scheme of all-optical 2:1 multiplexer (MUX) and MUX-based combinational circuits using nonlinear kerr-type materials

A new scheme of all-optical 2:1 multiplexer (MUX) and MUX-based combinational circuits using nonlinear kerr-type materials

High-resolution imaging for in-situ non-destructive testing by quantitative lensless digital holography

Dual Field-of-View Off-Axis Spatially Multiplexed Digital Holography Using Fresnel’s Bi-Mirror

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