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Zeeshan Ahmed (Fed)

A spectroscopist by training, Zeeshan Ahmed joined the Thermodynamic Metrology Group at NIST in 2012. His research activities focus on the development of novel, disruptive technologies that aim to replace legacy-based measurement platforms. Specifically, his current research is focused on the development of physics-constrained machine learning models for photonic and quantum sensors for biodosimetry, pressure, temperature and force sensing. This line of inquiry seeks to enable a cost-effective, integrated multi-functional sensor package with self-correcting measurement capabilities.

Dr. Ahmed has been awarded the Department of Commerce’s Bronze medal twice, in 2021 and 2016 for his innovation and leadership of cutting-edge research projects. In addition, his work with socio-economically disadvantaged students was recognized with the Equal Employment Opportunity Award in 2015. He currently serves as the Chairman of Task group on Emerging Technologies and is a member of the Strategic Planning Committee under Contact Thermometry Committee at the BIPM. Dr. Ahmed also holds an Affiliate Faculty position with George Mason University’s Mathematics department and the Quantum Science and Engineering Center (QSEC) where he collaborates with fellow members on the development of machine learning models to enable self-correcting sensors.

Highlights

Research Projects

Awards

Publications

Physics-based Models for photonic thermometers

Author(s)
Zeeshan Ahmed
Resistance thermometry, meticulously developed over the last century, provides a time-tested method for taking temperature measurements. However, fundamental

Emerging technologies in the field of thermometry

Author(s)
Zeeshan Ahmed, Graham Machin, Sergey Dedyulin
The past decade saw the emergence of new temperature sensors that have the potential to disrupt a century-old measurement infrastructure based on resistance

Patents (2018-Present)

Photonic Thermometer Module Assembly And Performing Photonic Thermometry

NIST Inventors
Nikolai Klimov , Tobias Herman and Zeeshan Ahmed
A photonic thermometer module assembly includes: a sheath; a sheath bottom plug; a sheath top flange; a top sealing flange; a heat exchanger; a photonic thermometer disposed on the heat exchanger such that the photonic thermometer determines a temperature of the sheath; and an optical fiber array in

PH Photothermal Spectrometer And Performing PH Photothermal Spectroscopy

NIST Inventors
Zeeshan Ahmed
A pH photothermal spectrometer includes a container that receives an analyte medium and pH-sensitive chromophore. An excitation fiber and optical thermometer are disposed in the container. The optical thermometer include a light receiver disposed on a temperature detector fiber.

Photonic Resonator Analyzer And Characterizing A Photonic Resonator

NIST Inventors
Zeeshan Ahmed
We describe a method for distinguishing optical modes of a resonator based on the characterization of the temperature sensitivity of a mode’s resonance frequency and its dispersion characteristics. This method requires an interrogator (made up of a tunable laser, broadband light source, frequency

A Method Of Mode Identification In Photonic Resonator

NIST Inventors
Zeeshan Ahmed
We describe a method for distinguishing optical modes of a resonator based on the characterization of the temperature sensitivity of a mode’s resonance frequency and its dispersion characteristics. This method requires an interrogator (made up of a tunable laser, broadband light source, frequency
Image for 10,816,325

Deformometer for Determining Deformation of an Optical Cavity Optic

NIST Inventors
Zeeshan Ahmed , Kevin O Douglass , Stephen Eckel , Patrick Egan and Jay H. Hendricks
A superconducting waveform synthesizer produces an arbitrary waveform and includes an encoder that produces a bitstream; a pattern generator that produces a current bias pulse from the bitstream; a Josephson junction that produces a quantized output pulse from the current bias pulse; and a converter
Created May 31, 2018, Updated November 27, 2023