Utpal Das

High-fidelity crop modelling: innovations driving sustainable fruit horticulture

Utpal Das, Annamalai Subbiah Mailappa, Silvia Nicolae, Shiva Sai Prasad et autres

Effective decision support systems rely on a clear understanding of real-world conditions and on developing strategies to manage them. In the current era of severe climate change, crop modelling has emerged as a valuable tool in fruit production. It enables farmers and …

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Evaluation of an Asymmetric Dual-Hop RF-FSO Relay System under the Effect of Atmospheric Turbulence and Misalignment

Utpal Das, Bijayananda Patnaik, Bibhudendra Acharya

This study analyses the efficacy of a fixed gain asymmetric dual-hop relay framework utilising the combination of radio frequency (RF) and free-space optical (FSO) methodology. This work calculates precise expressions in closed form for important statistical parameters, which are given by Meijer’s …

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Development of a Small Satellite Series ISRO Experience

Utpal Das, K. Kasturirangan

The development of a small Stretched Rohini Satellite Series (SROSS) in the Indian Space Research Organization (ISRO) has moved hand in hand with that of one class of indigenous launch vehicles, the Augmented Satellite Launch Vehicle (ASLV). In other words, these satellites …

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$128\times 128$ InGaAs/GaAs Strained-Superlattice Photodiode Arrays for 1064 nm NIR Detection

Dharmander Malik, Hark Hoe Tan, Utpal Das

High-performance proof-of-concept 128 × 128 InGaAs/GaAs strained-layer superlattice (SLS) photodiode (PD) array, featuring 8 x 8 μm2pixels with 2 μm interpixel gap, is demonstrated for efficient 1064 nm detection. The SLS photoabsorber design parameters are engineered using a calibrated 8-band k · …

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Review of: "A High-Performance All-Silicon Photodetector Enabling Telecom-Wavelength Detection at Room Temperature"

Utpal Das

This is very interesting work on waveguide photodiodes on Si to operate with su cient responsivity in the C-Band optical wavelengths.The authors have done a commendable job in the design, fabrication, and measurement of the device; however, there are a few loose …

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An Integrated MCDM-Based Mathematical Modeling Approach for Sustainable Practices of Vermicomposting in Educational Institutions

Mayank Singh Bhakuni, Utpal Das, Pooja Bhakuni, Sandeep Kumar et autres

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Novel IsOWC System Design Using Hybrid Diversity Technique

Utpal Das, Bijayananda Patnaik, Bibhudendra Acharya

The upcoming 6G communication network requires unprecedented data rates. However, RF systems with restricted bandwidth are insufficient for supporting services like multimedia applications, autonomous vehicles, online gaming etc. Inter-satellite Optical Wireless Communication (IsOWC) is a special category of optical wireless communication (OWC) …

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Design, optimization and characterization of InGaAsP/InP QW integrated tapered waveguides using QW intermixing

Dharmander Malik, Utpal Das

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Papaya Waste as a Nutraceuticals Product

Utpal Das, Shiva Sai Prasad

Carica papaya L. is a widely grown, well-known fruit crop of tropical and subtropical regions. Traditionally papaya is used for enhancing appetite, tenderizing meat abortifacient and vermifuge, etc. Almost all the wasted part of this plant, viz., peels, roots, leaves and seeds …

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Characterization of Single Photon Detector and Its Quenching Circuit Analysis

Utpal Das

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ANN Equalizer for Ultra-high Capacity Multiplexed IsOWC system

Utpal Das, Bijayananda Patnaik, Bibhudendra Acharya

In the present scenario, ultra-high bit rate communication systems are highly indispensable for 5G and 6G wireless communication applications such as: live video streaming, autonomous driving, online gaming, drone-based delivery etc. For smooth operations, spectrally efficient and low bit error communication system …

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Equalized Multiplexed IsOWC system using DP-QPSK modulation

Bijayananda Patnaik, Utpal Das, Prakash Kumar Rout, Bibhudendra Acharya

Inter-satellite optical wireless communication (IsOWC) is a promising technology that can be used for high-speed data transfer between satellites in space. In this paper, using decision feedback equalizer (DFE) and Dual Polarization Quadrature Phase Shift Keying (DP-QPSK) modulation techniques an IsOWC system …

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