Dr. M. Imran Cheema Profile

Dr. M. Imran Cheema

Associate Professor at Lahore Univ of Management Sciences

SPIE Involvement:

Conference Program Committee | Author

Area of Expertise:

Biophotonics , Agriphotonics , Optical Sensors

Websites:

Company Website

M. Imran Cheema obtained his Ph.D. and MS in Electrical Engineering from McGill University, Canada, in 2014 and the University of Colorado at Boulder, USA, in 2007, respectively. He earned his BS in Electrical Engineering from UET Lahore, Pakistan, in 2002. Currently, Imran is an associate professor in the Electrical Engineering department at Lahore University of Management Sciences (LUMS), Pakistan. His prior appointments include a photonics engineer at Oerlikon Optics Inc., USA, and a postdoctoral researcher at McGill University, Canada. In recognition of his teaching abilities, he was honored with the Vice Chancellor teaching excellence award in 2022. Furthermore, he was a finalist for the best national teacher award in the engineering and science category in 2023. His research focuses on designing and developing optical sensors for various applications, including point-of-care, agriculture, and food security.

Proceedings Article | 13 March 2024 Presentation + Paper

Application of conditional generative adversarial networks toward time-efficient and high-fidelity imaging via multimode fibers

Jawaria Maqbool, Syed Talal Hassan, M. Imran Cheema

Proceedings Volume 12903, 129030C (2024) https://doi.org/10.1117/12.3000486

KEYWORDS: Multimode fibers, Spatial light modulators, Speckle pattern, Biological imaging, Deep learning

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Proceedings Article | 13 March 2024 Presentation + Paper

Toward rapid tuberculosis diagnostics: optical fiber sensor for LAM detection

Ubaid Ullah, Seerat Saleem, Muddassar Farooq, Basit Yameen, M. Imran Cheema

Proceedings Volume 12835, 128350A (2024) https://doi.org/10.1117/12.3000485

KEYWORDS: Fiber optics sensors, Surface chemistry

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Proceedings Article | 6 March 2023 Presentation + Paper

Arsenic detection in drinking water using evanescent fiber cavity ring down spectroscopy

Ubaid Ullah, Daniyal Ghauri, Falak Sher, M. Imran Cheema

Proceedings Volume 12372, 123720O (2023) https://doi.org/10.1117/12.2649240

KEYWORDS: Arsenic, Water, Absorption, Spectroscopy, Biosensors, Optical sensors, Contamination

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Arsenic is a significant drinking water contaminant whose prolonged consumption can cause cancer, skin lesions, and cardiovascular diseases. The environmental protection agency (EPA) declares 10 ppb and lower as an acceptable limit for arsenic in drinking water. Several technologies, such as biomolecules, nanoparticles, nanowires, carbon nanotubes, and quantum dots have been deployed under optics to develop viable optical sensors for arsenic detection in water. Although these approaches offer decent accuracy, they require trained laboratory personnel and state-of-the-art lab facilities, impose several adaptability constraints, and take hours in results production. Therefore, there is a need for an economical and easy-to-fabricate optical sensor that can provide rapid, precise, and portable detection of arsenic in drinking water. Here, we demonstrate a novel fiber sensor that employs phase shift cavity ring down spectroscopy (PS-CRDS) to record phase shift measurements in fiber cavities. In PS-CRDS, the cavity ring down time is proportional to the phase shift between the reference modulating signal and the cavity output, a measure of sensing event (absorption due to arsenic) inside the cavity. The sensor utilizes a tapered fiber of waist ˂ 12 µm as a sensing head. We place the tapered fiber in a fluidic cell and insert the assembly inside the optical cavity. Furthermore, we chemically treat the solution with Azure B to add specificity toward arsenic detection. Azure B acts as a chromogenic reagent that enhances the absorption loss of arsenic in water samples at 633 nm. We inject 3 mL of arsenic-contaminated water and Azure B solution into the fluidic cell and record phase shift measurements. We experimentally demonstrate that the sensor has a minimum detection limit of 5 ppb and a sensitivity of 0.0133o /ppb. We anticipate our work will lead to rapid, portable, and accurate optical sensors for physical, chemical, and biological applications.

Proceedings Article | 4 March 2022 Presentation + Paper

Detecting aflatoxin M1 using wavelength-scanned fiber cavity attenuated phase shift spectroscopy

M. Imran Cheema, Daniyal Ghauri, Ubaid Ullah

Proceedings Volume 11979, 1197904 (2022) https://doi.org/10.1117/12.2612160

KEYWORDS: Phase shifts, Spectroscopy, Sensors, Modulation, Head, Fiber Bragg gratings, Optical sensors, Laser sources, Free space, Absorption

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Proceedings Article | 3 March 2022 Presentation + Paper

Use of machine learning in a speckle-based optical fiber sensor for temperature detection

Rabeeya Hamid, M. Imran Cheema

Proceedings Volume 12019, 120190J (2022) https://doi.org/10.1117/12.2608492

KEYWORDS: Speckle pattern, Optical fibers, Temperature metrology, Machine learning, Data modeling, Gold, Temperature sensors, Fiber optics sensors, Speckle, Copper

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Proceedings Article | 2 March 2022 Paper

Tuberculosis diagnosis from sputum using Raman spectroscopy

Ubaid Ullah, Zarfishan Tahir, Obaidullah Qazi, Shaper Mirza, M. Imran Cheema

Proceedings Volume 11957, 1195703 (2022) https://doi.org/10.1117/12.2608594

KEYWORDS: Raman spectroscopy, Sensors, Diagnostics, Principal component analysis, Optical filters, Spectroscopy, Sensor performance, Optical sensors, Machine learning, Bacteria

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Proceedings Article | 5 March 2021 Presentation + Paper

Bandpass filter with flat-top transmission using multistage Fabry-Perot with unequal cavity lengths

Faiza Iftikhar, Imran Cheema

Proceedings Volume 11713, 117130N (2021) https://doi.org/10.1117/12.2578189

KEYWORDS: Fabry–Perot interferometers, Bandpass filters, Reflectivity, Error analysis, Tolerancing, Resonators, Reflectors, Optical filters, Optical design, Optical communications

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Proceedings Article | 5 March 2021 Presentation + Paper

Fluoride detection in drinking water using evanescent fiber cavity ring down spectroscopy

Ubaid Ullah, Murtaza Haider Syed, Daniyal Ghauri, Falak Sher, M. Imran Cheema

Proceedings Volume 11635, 116350T (2021) https://doi.org/10.1117/12.2577575

KEYWORDS: Water, Spectroscopy, Sensors, Phase shifts, Absorption, Head, Fiber Bragg gratings, Chemistry, Biosensors

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Proceedings Article | 21 February 2020 Paper

Amplified phase shift – fiber cavity ring down spectroscopy for biosensing applications at 1550nm

M. Imran Cheema, Ubaid Ullah, M. Daniyal Ghauri, R. M. Armaghan Ayaz, Yigit Uysalli, Berna Morova, Alper Kiraz

Proceedings Volume 11258, 112580G (2020) https://doi.org/10.1117/12.2544749

KEYWORDS: Biosensing, Sensors, Fiber optics sensors

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Proceedings Article | 21 February 2020 Presentation + Paper

Fabry-Perot etalon with three fiber Bragg gratings as a digital sensor

Ubaid Ullah, M. Imran Cheema

Proceedings Volume 11258, 112580F (2020) https://doi.org/10.1117/12.2544741

KEYWORDS: Sensors, Fiber Bragg gratings, Fabry–Perot interferometers, Resonators

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Proceedings Article | 19 February 2013 Open Access

Application of phase shift ring down spectroscopy to microcavities for biosensing

M. Imran Cheema, Usman Khan, Andrea Armani, Andrew Kirk

Proceedings Volume 8594, 859401 (2013) https://doi.org/10.1117/12.2011779

KEYWORDS: Optical microcavities, Phase shifts, Spectroscopy, Biological research, Mathematical modeling, Sensors, Biosensing, Absorption, Modulation, Biosensors

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