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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 - 9 of 9
Patent Images and description for 10,955,617

High-Resolution Photonic Thermometer Article

NIST Inventors
Kevin O Douglass , Zeeshan Ahmed and Nikolai Klimov
Patent Description NIST has created a method that sense temperature variations on a µK-level using an on-chip integrated passive photonic device that features a high-quality factor nanocavity. The method includes the (i) improved design of nanobeam photonic crystal cavity, (ii) specialized fiber­
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
Patent description NIST has invented a pulse quantizer that uses arrays of one or more Josephson junctions to create a pulse voltage output that is immune to differential pulse timing shifts. When the output pulse patterns are used to encode a waveform, for example, the waveform will be free from

Photonic Calorimeter and Process for Performing Calorimetry

NIST Inventors
Ronald Tosh , Zeeshan Ahmed , Ryan P. Fitzgerald and Nikolai Klimov
Patent Description The invention i s 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 can be used in an
A list of radiation-induced materials modifications that are NIST traceable

Photonic Dosimeter and Process for Performing Dosimetry

NIST Inventors
Ronald Tosh , Zeeshan Ahmed , Ryan P. Fitzgerald and Nikolai Klimov
Patent Description Radiation-induced materials modification is ubiquitous. These applications rely on dosimetry to reliably deliver the desired amount of radiation to the right place. Currently the dosimetry standard is based on calorimetry of a large water phantom irradiated exclusively by Co-60
Exploded schematic shows line drawings of five layers inside the optofluidic flow meter.

Optofluidic Flow Meter

NIST Inventors
Zeeshan Ahmed and Gregory A Cooksey
The NIST optical flow meter uses a photonic sensor to detect pressure changes inside a microfluidic channel, which is then used to calculate volumetric flow rates. It provides on-chip assessment of flow and heat transfer resulting in improvement in fluid metrology and advances in biological sensing.
Photonic thermometer packages

Optical Temperature Sensor

NIST Inventors
Zeeshan Ahmed , Stephen Semancik , Jacob Taylor and Gregory F. Strouse
The photonic temperature sensor relies on ultra-sensitive, frequency-based measurements of the effect of heat on the dimensions and predominant thermo-optic properties of the photonic resonator.

A METHOD OF MODE IDENTIFICATION IN PHOTONIC RESONATOR

NIST Inventors
Zeeshan Ahmed
patent description The invention is a method for utilizing a moderately broadband spectrometer to utilize the mode frequency (vm), mode-to-mode separation (FSRmn), and their respective dependence on a thermophysical perturbation (e.g. temperature) to uniquely label each mode.

PH PHOTOTHERMAL SPECTROMETER AND PERFORMING PH PHOTOTHERMAL SPECTROSCOPY

NIST Inventors
Zeeshan Ahmed
patent description Although the determination of pH (H+ concentration in solution) is a standard laboratory measurement, new techniques capable of accurately measuring pH are being developed to meets the demands of bio-industrial processing, and tissue engineering industry. These specific