Patents
US 12763099 B1: Single mode laser diode having multilayer dielectric mirror providing in-phase back facet reflection
- Granted
- 2026-10-13
- Filed
- 2025-09-11 application 19326255
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Described are laser diodes, and hard drive devices incorporating laser diodes, that include multilayer dielectric mirrors on the back facets thereof that are constructed to provide a high degree of in-phase reflectivity. Such laser diode constructions can help ensure stable single-mode laser operation, which may be useful in maintaining or increasing high areal density capability recording in heat-assisted magnetic recording applications. The described laser diodes include an encapsulant layer over at least the front and back facet, and a multilayer dielectric mirror disposed over the encapsulant layer at the back facet. The multilayer dielectric mirror includes alternating layers of high and low refractive index material, the high refractive index being higher than that of the encapsulant layer and the low refractive index being lower than that of the encapsulant layer. A layer of the low refractive index material is disposed immediately adjacent to the encapsulant layer. This construction can produce high reflectivity as well as in-phase reflections.
Source: PTBLXML, file of 2026-10-13 (ipgb20261013.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Seagate Technology LLC 4,936 patents | US company or organization | Fremont, CA | PTBLXML, file of 2026-10-13 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Supratim Basak | Londonderry, GB | PTBLXML, file of 2026-10-13 | ||
| Danmark Ramos Pablo | Londonderry, GB | PTBLXML, file of 2026-10-13 | ||
| Aidan Dominic Goggin | Redcastle, IE | 52 | PTBLXML, file of 2026-10-13 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G11B | Information storage based on relative movement between record carrier and transducer | G11B5/4866 | PTBLXML, file of 2026-10-13 |
| 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 | H01S5/0287 | PTBLXML, file of 2026-10-13 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2026-10-06 | Assignment Assignment of assignor's interest | BASAK, SUPRATIM signed 2025-08-28 PABLO, DANMARK RAMOS signed 2025-08-09 GOGGIN, AIDAN DOMINIC signed 2025-08-09 | SEAGATE TECHNOLOGY LLC FREMONT, CA | 76270/1 | PASDL, file of 2026-10-16 |
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.
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