Patents
US 8207474 B2: Self-seeded single-frequency laser peening method
- Granted
- 2012-06-26
- Filed
- 2009-07-21 application 12506530
- Type
- Utility · 14 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method of operating a laser to obtain an output pulse having a single wavelength, comprises inducing an intracavity loss into a laser resonator having an amount that prevents oscillation during a time that energy from the pump source is being stored in the gain medium. Gain is built up in the gain medium with energy from the pump source until formation of a single-frequency relaxation oscillation pulse in the resonator. Upon detection of the onset of the relaxation oscillation pulse, the intracavity loss is reduced, such as by Q-switching, so that the built-up gain stored in the gain medium is output from the resonator in the form of an output pulse at a single frequency. An electronically controllable output coupler is controlled to affect output pulse characteristics. The laser acts a master oscillator in a master oscillator power amplifier configuration. The laser is used for laser peening.
Source: PVGPATDIS, file of 2026-04-10 (ipg120626.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| METAL IMPROVEMENT COMPANY, LLC 12 patents | US company or organization | Paramus, NJ | PVGPATDIS, file of 2026-04-10 | |
| THE REGENTS OF THE UNIVERSITY OF CALIFORNIA 8,781 patents | US company or organization | Oakland, CA | REGENTS OF THE UNIVERSITY OF CALIFORNIA State business registration FUZZY medium confidence: same name (legal endings aside) and state | PVGPATDIS, file of 2026-04-10 |
| 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 | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| C. Brent Dane | Livermore, CA | 6 | PVGPATDIS, file of 2026-04-10 | |
| Lloyd Hackel | Livermore, CA | 8 | PVGPATDIS, file of 2026-04-10 | |
| Fritz B. Harris | Rocklin, CA | 5 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H01S | Devices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light; devices using stimulated emission of electromagnetic radiation in wave ranges other than optical | H01S3/115 | PVGPATDIS, file of 2026-04-10 |
| C21D | Modifying the physical structure of ferrous metals; general devices for heat treatment of ferrous or non-ferrous metals or alloys; making metal malleable, e.g. by decarburisation or tempering | C21D10/005 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2020-10-12 | Government interest Confirmatory license (see document for details) | LAWRENCE LIVERMORE NATIONAL SECURITY, LLC signed 2020-10-09 | U.S. DEPARTMENT OF ENERGY WASHINGTON, DC | 54047/504 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
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.