Dr. Nageswara Rao Lalam Profile

Dr. Nageswara Rao Lalam

Research Scientist at National Energy Technology Lab

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 13 March 2024 Paper

Paper

Brillouin scattering-based simultaneous and discriminative strain and temperature sensing with double Brillouin peak fibers

Hari Bhatta, Nageswara Lalam, Michael Buric, Ruishu Wright

Proceedings Volume 12835, 128350M (2024) https://doi.org/10.1117/12.3002849

KEYWORDS: Signal to noise ratio, Measurement uncertainty, Error analysis, Scattering, Sensing systems

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Proceedings Article | 11 March 2024 Presentation + Paper

Presentation + Paper

Multi-parameter distributed fiber sensing system based on hybrid Rayleigh and Brillouin scattering

Nageswara Lalam, Hari Bhatta, Michael Buric, Ruishu Wright

Proceedings Volume 12893, 128930J (2024) https://doi.org/10.1117/12.3001195

KEYWORDS: Sensing systems, Rayleigh scattering, Vibration, Sensors, Fiber optics sensors, Signal detection, Optical fibers, Temperature metrology, Optical sensing, Industrial applications

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Proceedings Article | 4 October 2023 Presentation + Paper

Presentation + Paper

Plasmonic and interferometric optical fiber sensors for electrical system monitoring applications

P. Ohodnicki, D. Karki, Y. Su, T. Khanikar, K. Naeem, N. Lalam, J. Wuenschell, R. Wright, M. Buric

Proceedings Volume 12647, 126470H (2023) https://doi.org/10.1117/12.2677290

KEYWORDS: Sensors, Fiber optics sensors, Transformers, Acoustics, Magnetism, Chemical analysis, Acetylene, Magnetic sensors, Plasmonics, Vibration

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

Machine learning data analytics based on distributed fiber sensors for pipeline feature detection

Pengdi Zhang, Paul Ohodnicki, Ruishu Wright, Nageswara Lalam, Abhishek Venketeswaran, Enrico Sarcinelli, Sandeep Bukka

Proceedings Volume 12532, 125320C (2023) https://doi.org/10.1117/12.2663225

KEYWORDS: Corrosion, Matrices, Simulations, Machine learning, Singular value decomposition, Waveguides, Data modeling, Fiber optics sensors, Wave propagation, Acoustics

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

Strain-free FBG sensors for accurate temperature measurements from cryogenic temperatures to 300 degrees C

Kevin Chen, Philip Swinehart, Shuda Zhong, Jeffrey Wuenschell, Nageswara Lalam, Michael Buric, Shenghan Gao

Proceedings Volume 12532, 125320U (2023) https://doi.org/10.1117/12.2670079

KEYWORDS: Fiber Bragg gratings, Sensors, Temperature metrology, Packaging, Fiber optics sensors, Cryogenics, Temperature sensors

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

Nuclear canister integrity monitoring using quasi-distributed fiber acoustic sensors and physics-based modeling

K. Naeem, D. Karki, P. Zhang, E. Sarcinelli, R. Wright, R. Meyer, N. Lalam, P. Ohodnicki

Proceedings Volume 12532, 125320I (2023) https://doi.org/10.1117/12.2665084

KEYWORDS: Acoustics, Fiber optics sensors, Corrosion, Vibration, Modeling, Sensors, Finite element methods, Structural health monitoring, Optical sensing, Waveguides

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

Development and pilot-scale demonstration of optical frequency domain reflectometry (OFDR) for gas pipeline monitoring

Matthew Brister, Khurram Naeem, Nageswara Lalam, Paul Ohodnicki, Ruishu Wright

Proceedings Volume 12532, 125320B (2023) https://doi.org/10.1117/12.2665077

KEYWORDS: Mach Zehnder interferometers, Temperature metrology, Signal processing, Optical fibers, Signal detection, Pipes, Optical sensing, Reflectometry, Spatial resolution, Reflection

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

Field-testing of water pipeline flow monitoring based on SMS fiber optic acoustic sensor

Brandon Grainger, Nageswara Lalam, Paul Ohodnicki, Michael Buric, Ruishu Wright

Proceedings Volume 12532, 125320Q (2023) https://doi.org/10.1117/12.2663289

KEYWORDS: Fiber optics sensors, Acoustics, Sensors, Vibration, Pipes, Single mode fibers, Structured optical fibers, Fiber optics, Vacuum fluorescent displays, Fusion energy

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

Optimization of the fourth self-imaging spectral response in magnetic fluid cladded-MMI fiber optic sensor for magnetometry

Dolendra Karki, Khurram Naeem, Nageswara Lalam, Paul Ohodnicki, Tulika Khanikar

Proceedings Volume 12532, 125320K (2023) https://doi.org/10.1117/12.2664107

KEYWORDS: Magnetic sensors, Refractive index, Absorption, Fiber optics sensors, Spectral response, Nanoparticles, Multimode interference devices, Refractometry, Magnetometry, Magnetooptics

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Proceedings Article | 13 June 2023 Presentation + Paper

Presentation + Paper

High-sensitivity distributed pipelines infrastructure monitoring with internal deployed fibers and Rayleigh enhancement

Tulika Khanikar, Khurram Naeem, Dolendra Karki, Nageswara Lalam, Ruishu Wright, Andy Gillooly, Kent Weisenberg, Paul Ohodnicki, Ping Lu, Paul Westbrook

Proceedings Volume 12532, 125320J (2023) https://doi.org/10.1117/12.2665058

KEYWORDS: Signal to noise ratio, Acoustics, Optical fibers, Metals, Single mode fibers, Optical sensing, Ferroelectric materials, Structural health monitoring, Fiber optics sensors, Data acquisition

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Proceedings Article | 27 May 2022 Presentation + Paper

Presentation + Paper

Low-cost plasmonic fiber probe and wireless interrogation for electric power equipment temperature sensing

Nageswara Lalam, Brandon Grainger, Paul Ohodnicki, Yang-Duan Su, Jordan Athas

Proceedings Volume 12105, 121050A (2022) https://doi.org/10.1117/12.2617139

KEYWORDS: Fiber optics sensors, Sensors, Nanocomposites, Temperature sensors

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Proceedings Article | 27 May 2022 Presentation + Paper

Presentation + Paper

Robotic fiber optic internal deployment tool for pipeline integrity monitoring

Nageswara Lalam, Dolendra Karki, Ibrahiim Syed, Kent Weisenberg, Ruishu Wright, Paul Ohodnicki

Proceedings Volume 12105, 1210504 (2022) https://doi.org/10.1117/12.2619045

KEYWORDS: Fiber optics, Robotics, Optical fiber cables, Optical fibers, Temperature metrology, Sensing systems, Fiber optics sensors, Rayleigh scattering

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Proceedings Article | 27 May 2022 Presentation + Paper

Presentation + Paper

Pipeline monitoring based on ultrasonic guided acoustic wave and fiber optic sensor fusion

Nageswara Lalam, Ruishu Wright, Paul Ohodnicki

Proceedings Volume 12105, 1210509 (2022) https://doi.org/10.1117/12.2619042

KEYWORDS: Fiber optics sensors, Waveguides, Sensors, Acoustics, Ultrasonics, Single mode fibers, Structured optical fibers, Fiber Bragg gratings

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Proceedings Article | 12 April 2021 Paper

Paper

Performance improvement of phase-optical time domain reflectometry (Φ-OTDR) based on wavelength diversity technique

Nageswara Lalam, Michael Buric, Ping Lu

Proceedings Volume 11739, 117390C (2021) https://doi.org/10.1117/12.2588362

KEYWORDS: Signal to noise ratio, Reflectometry, Sensing systems, Interference (communication), Spatial resolution, Oscillators, Fiber lasers, Earthquakes, Denoising, Demodulation

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Proceedings Article | 5 March 2021 Paper

Paper

Probabilistic deep neural network based signal processing for Brillouin gain and phase spectrums of vector BOTDA system

Nageswara Lalam, Ping Lu, Abhishek Venketeswaran, Michael Buric

Proceedings Volume 11692, 1169213 (2021) https://doi.org/10.1117/12.2578509

KEYWORDS: Artificial neural networks, Signal processing, Time metrology, Spatial resolution, Signal to noise ratio, Sensors, Evolutionary algorithms

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Proceedings Article | 20 August 2020 Paper

Paper

Distributed carbon dioxide sensor based on sol-gel silica-coated fiber and optical frequency domain reflectometry (OFDR)

Nageswara Lalam, Ping Lu, Fei Lu, Tao Hong, Mudabbir Badar, Michael Buric

Proceedings Volume 11500, 115000M (2020) https://doi.org/10.1117/12.2568653

KEYWORDS: Carbon monoxide, Fiber coatings, Sensors, Silica, Reflectometry, Single mode fibers, Sol-gels, Fiber optics sensors, Coating

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Proceedings Article | 27 April 2020 Presentation

Presentation

Evanescent wave fiber-optic CH4/CO2 gas sensing based on porous materials (Conference Presentation)

Nageswara Lalam, Ping Lu, Mudabbir Badar, Fei Lu, Tao Hong, Michael Buric, Paul Ohodnicki

Proceedings Volume 11389, 1138934 (2020) https://doi.org/10.1117/12.2558809

KEYWORDS: Fiber optics sensors, Fiber optics, Carbon dioxide, Corrosion, Methane, Silica, Polymers, Wave sensors, Absorption, Climate change

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Proceedings Article | 23 April 2020 Paper

Paper

Raman-assisted BOTDA performance improvement with the differential pulse-width pair technique and an artificial neural network based fitting algorithm

Nageswara Lalam, Ping Lu, Abhishek Venketeswaran, Paul Ohodnicki, Michael Buric

Proceedings Volume 11415, 1141503 (2020) https://doi.org/10.1117/12.2558717

KEYWORDS: Raman spectroscopy, Scattering, Spatial resolution, Artificial neural networks, Surface plasmons, Evolutionary algorithms, Raman scattering, Sensors, Light scattering, Acoustics

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Proceedings Article | 2 March 2020 Presentation + Paper

Presentation + Paper

Phase-optical time domain reflectometry ([theta]-OTDR) with enhanced performance

Nageswara Lalam, Ping Lu, Paul Ohodnicki, Michael Buric

Proceedings Volume 11287, 112870R (2020) https://doi.org/10.1117/12.2545089

KEYWORDS: Acoustics, Oscillators, Optical fibers, Signal detection, Demodulation, Reflectometry, Sensing systems, Signal to noise ratio, Polarization, Fiber amplifiers

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Proceedings Article | 14 May 2019 Presentation + Paper

Presentation + Paper

Enhanced performance of Brillouin distributed fiber sensor with hybrid amplification

Michael Buric, Paul Ohodnicki, Ping Lu, Nageswara Lalam

Proceedings Volume 11000, 1100003 (2019) https://doi.org/10.1117/12.2518391

KEYWORDS: Raman spectroscopy, Signal detection, Optical amplifiers, Sensing systems, Signal to noise ratio, Scattering, Modulation, Fiber optics sensors, Acoustics, Light scattering

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Proceedings Article | 4 March 2019 Presentation + Paper

Presentation + Paper

Vector Brillouin optical time-domain analysis with Raman amplification and optical pulse coding

Ping Lu, Nageswara Lalam, Bo Liu, Michael Buric, Paul Ohodnicki

Proceedings Volume 10925, 1092512 (2019) https://doi.org/10.1117/12.2510972

KEYWORDS: Raman spectroscopy, Signal to noise ratio, Spatial resolution, Signal detection, Roads, Scattering, Signal attenuation, Receivers, Sensors, Modulation

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Proceedings Article | 23 April 2017 Paper

Paper

Performance improvement of BOTDR system using wavelength diversity technique

Wai Pang Ng, Xuewu Dai, Qiang Wu, Yong Qing Fu, Nageswara Lalam

Proceedings Volume 10323, 1032366 (2017) https://doi.org/10.1117/12.2263294

KEYWORDS: Signal to noise ratio, Sensing systems, Oscillators, Temperature metrology, Polarization, Laser sources, Modulation, Reflectometry, Scattering, Photodetectors

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Showing 5 of 22 publications

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