Government of the United States of America, As Represented by the Secretary of Commerce

Kevin O'Connell Douglass

Zeeshan Ahmed

Jay Howard Hendricks

Nikolai Nikolaevich Klimov

Stephen Paul Eckel

Jacob Edmond Ricker

An optical refraction barometer measures pressure based on refractivity changes and includes: an optical light source; an optical frequency controller; a first optical phase controller; a first polarization controller; an electronic reference arm in optical communication with the first polarization controller; a second optical phase controller in optical communication with the optical frequency controller; a second polarization controller in optical communication with the second optical phase controller; an electronic sample arm in optical communication with the second polarization controller and in electrical communication with the second optical phase controller; a second sideband frequency generator; a mixer in electrical communication with the detector and the second sideband frequency generator; and a first sideband frequency generator in electrical communication with the mixer; and a dual fixed length optical cavity refractometer.

Optical refraction barometer

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 communication with the photodetector and that: receives the photodetector signal from the photodetector; receives a reference frequency signal; and produces a lock signal from the photodetector signal, based on the reference frequency signal; a local oscillator in communication with the phase sensitive detector and that produces the reference frequency signal; and a servo controller in communication with the phase sensitive detector and local oscillator and that: receives the lock signal from the phase sensitive detector; receives the reference frequency signal from the local oscillator; and produces the control signal such that absorption power of the photonic crystal is maximized through wavelength control of the light source by the control signal.

Growing community of inventors

Ellicott City, MD, United States of America

Kevin O'Connell Douglass