Photonic resonator analyzer and characterizing a photonic resonator

Patent metadata

Field	Value
Publication number	US-11255746-B2
Application number	US-202017113222-A
Country	US
Kind code	B2
Filing date	Dec 7, 2020
Priority date	Dec 6, 2019
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A photonic resonator analyzer characterizes a photonic resonator and incudes a light source that provides a probe light; a photonic resonator that receives the probe light and produces product light; an optical detector that receives the product light and produces a product signal; a mode analyzer that receives the product signal and produces a resonator spectrum; and a spectral analyzer that receives the resonator spectrum, performs regression by fitting a non-parametric model to the resonator spectrum, and produces a thermal response function of the photonic resonator from fitting the non-parametric model to the resonator spectrum to characterize the photonic resonator.

First claim

What is claimed is:

1. A photonic resonator analyzer for characterizing a photonic resonator, the photonic resonator analyzer comprising:
a light source that provides a probe light;
a photonic resonator in optical communication with the light source and that receives the probe light from the light source and produces product light from the probe light;
an optical detector in optical communication with the photonic resonator and that receives the product light from the photonic resonator and that produces a product signal from the product light;
a mode analyzer in communication with the optical detector and that receives the product signal from the optical detector and produces a resonator spectrum from the product signal, the resonator spectrum comprising:
a plurality of mode features, each mode feature individually comprising:
a primary spline comprising a primary slope;
a secondary spline comprising a secondary slope; and
a mode peak spectrally interposed between the primary spline and the secondary spline; and
a modal width that is a full width at half maximum of the mode feature from the primary spline to the secondary spline,
such that mode peaks of adjacent mode features are spectrally separated by a mode distance and a spectrum valley; and

a spectral analyzer in communication with the mode analyzer and that:
receives the resonator spectrum from the mode analyzer,
analyzes the resonator spectrum by:
producing a modal kurtosis by normalizing the primary slope to the secondary slope; and
producing a fringe visibility by normalizing the mode peak to the modal width; and

performs regression by:
fitting a non-parametric model to the resonator spectrum, wherein the spectrum valley, the mode peak, primary spline, secondary spline, modal width, mode distance, primary slope, secondary slope, and modal kurtosis are fitting parameters of the non-parametric model; and
produces a thermal response function of the photonic resonator from fitting the non-parametric model to the resonator spectrum to characterize the photonic resonator.

2. A process for characterizing a photonic resonator, the process comprising:
providing a photonic resonator;
communicating a probe light from a light source;
receiving, by the photonic resonator, the probe light;
producing, by the photonic resonator, a product light from the probe light;
communicating the product light from the photonic resonator to an optical detector;
receiving, by the optical detector, the product light;
producing, by the optical detector, a product signal;
communicating the product signal from the optical detector to a mode analyzer;
receiving, by the mode analyzer, the product signal;
producing, by the mode analyzer, a resonator spectrum from the product signal, the resonator spectrum comprising:
a plurality of mode features, each mode feature individually comprising:
a primary spline comprising a primary slope;
a secondary spline comprising a secondary slope; and
a mode peak spectrally interposed between the primary spline and the secondary spline; and
a modal width that is a full width at half maximum of the mode feature from the primary spline to the secondary spline,
such that mode peaks of adjacent mode features are spectrally separated by a mode distance and a spectrum valley;

analyzing the resonator spectrum by:
producing a modal kurtosis by normalizing the primary slope to the secondary slope;
producing a fringe visibility by normalizing the mode peak to the modal width; and

performing regression by:
fitting a non-parametric model to the resonator spectrum, wherein the spectrum valley, the mode peak, primary spline, secondary spline, modal width, mode distance, primary slope, secondary slope, and modal kurtosis are fitting parameters of the non-parametric model; and
determining a thermal response function of the photonic resonator from fitting the non-parametric model to the resonator spectrum to characterize the photonic resonator.

Assignees

• Government Of The Us Secretary Of Commerce

Inventors

• Ahmed Zeeshan

Classifications

• G02B1/005

  made of photonic crystals or photonic band gap materials (photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295) · CPC title

• G01M11/33 Primary

  with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face · CPC title

• G02B6/29338

  Loop resonators · CPC title

• G01K11/32

  using changes in transmittance, scattering or luminescence in optical fibres · CPC title

• H01P7/00

  Resonators of the waveguide type · CPC title