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Search Patents by Zeeshan Ahmed

Patents listed here reflect only technologies patented from FY 2018-present. To view all of NIST's patented technologies, visit the NIST pages on the Federal Laboratory Consortium website.

Displaying 1 - 10 of 10
Depiction of packaging assembly with all modules

A Super Accurate Temperature Sensor That Works Without Electricity

NIST Inventors
Nikolai Klimov , Tobias Herman and Zeeshan Ahmed
This invention introduces a photonic thermometer that uses optical fibers to measure temperature. The thermometer is designed with a sheath and module assembly to enhance accuracy and durability. It leverages photonic technology to provide precise temperature readings without relying on traditional

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
An empty petri dish with two optical fibers, illustrating one version of the researchers’ experiment. The left-hand fiber (usually shining infrared light, but depicted here as visible red light) is a temperature sensor. The top fiber shines green, red or blue light into the petri dish to adjust the signal that the temperature sensor measures.

PH Photothermal Spectrometer And Performing PH Photothermal Spectroscopy

NIST Inventors
Zeeshan Ahmed
A device that uses multiple wavelengths (colors) of light to probe the pH-dependent changes in absorbance of pH-sensitive dye by determining the difference in temperature rise due to differences in light absorbance at different colors. The absorbed light is thermalized, resulting in an increase in
Patent Images and description for 10,955,617

High-Resolution Photonic Thermometer Article

NIST Inventors
Kevin O Douglass , Zeeshan Ahmed and Nikolai Klimov
A high-resolution photonic thermometer article performs high-resolution thermometry and includes: a light source; a photonic thermometer with a waveguide and a photonic crystal cavity that stores light; a photodetector in communication with the photonic thermometer; a phase sensitive detector in
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
Graph inset shows plots of measurements obtained at NIST exhibiting linear temperature dependence for Fiber Bragg Gratings and Photonic Ring Resonators on a Chip.

Photonic Calorimeter

NIST Inventors
Ronald Tosh , Zeeshan Ahmed , Ryan P. Fitzgerald and Nikolai Klimov
The calorimeter uses embedded, nanofabricated photonic sensors to enable micro-scale spatial resolution of dose (energy) distributions and gradients. It presents an alternative to thermistors used in conventional calorimeters for radiation dosimetry, comprising photonic sensors for in-situ dose and
An array of photonic dosimeters subjected to ionizing radiation.

Photonic Dosimeter

NIST Inventors
Ronald Tosh , Zeeshan Ahmed , Ryan P. Fitzgerald and Nikolai Klimov
NIST scientists have developed a photonic device whose resonance characteristics (such as quality factor, peak position, and free spectral range) change in a predictable way in response to the interaction of radiation with the sensor and/or its surroundings. The invention consists of one or more
Depiction of OptoFluidic Flow Meter

Optofluidic Flow Meter

NIST Inventors
Zeeshan Ahmed and Gregory A Cooksey
Optofluidics is the marriage of microfluidics and optical technology. The NIST Optical Flow Meter (US Patent 10,151,681) provides an on-chip assessment of flow and heat transfer, resulting in vast improvements in fluid metrology and advances in biological sensing.
Photonic thermometer packages

Optical Temperature Sensor

NIST Inventors
Zeeshan Ahmed , Steve Semancik , Jacob Taylor and Gregory F. Strouse
A thermometer includes a substrate; an optical resonator disposed on the substrate and including an optical resonance, the optical resonator being configured to receive a resonant frequency corresponding to the optical resonance; and a waveguide disposed on the substrate proximate to the optical

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
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