An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
https://www.nist.gov/patents/inventors/1157856
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.
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
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
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
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
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.
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.
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.
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