Patents
US 12768639 B2: Three-phase spectral interferometry with improved signal retrieval
- Granted
- 2026-10-20
- Filed
- 2023-11-30 application 18525578
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Methods, systems and devices are described that enable measurement and characterization of complex laser pulses by relying on three interferograms that are measured simultaneously. The described three-phase spectral interferometry (3PSI) can meet the growing demand for optical recorders with long record and 1 ps or finer resolution. These techniques leverage various calibration and signal retrieval operations that allow improved system performance. An example method for determining characteristics of an input optical signal includes measuring the spectra associated with three interferograms produced at outputs of a three-by-three optical splitter, and determining an amplitude and a phase value of the input optical signal using those measurements and the results of a calibration procedure that characterizes point spread functions across multiple spectrometers and determines corrections factors for the spectrometers.
Source: PTBLXML, file of 2026-10-20 (ipgb20261020.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Lawrence Livermore National Security, LLC 1,498 patents | US company or organization | Livermore, CA | LAWRENCE LIVERMORE NATIONAL SECURITY, LLC State business registration EXACT high confidence: identical full name and state | PTBLXML, file of 2026-10-20 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Ryan Douglas Muir | Livermore, CA | 14 | PTBLXML, file of 2026-10-20 | |
| John E. Heebner | San Ramon, CA | 17 | PTBLXML, file of 2026-10-20 | |
| Daniel Ernest Mittelberger | Livermore, CA | PTBLXML, file of 2026-10-20 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01B | Measuring length, thickness or similar linear dimensions; measuring angles; measuring areas; measuring irregularities of surfaces or contours | G01B9/02041 | PTBLXML, file of 2026-10-20 |
| G01J | Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light; colorimetry; radiation pyrometry | G01J3/45 | PTBLXML, file of 2026-10-20 |
| G11B | Information storage based on relative movement between record carrier and transducer | G11B7/0065 | PTBLXML, file of 2026-10-20 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.