Integrated optical device for magneto-optical recording and reading head
US4991160A · kind A · utility
20Cited by
5References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An integrated optical device for magneto-optical recording and/or reading employs elements that may be fabricated on a substrate using semiconductor manufacturing technology. Such elements include, but are not limited to, a system of waveguides for transmitting light energy beams from lasers to end portions of the waveguides exposed to the outside of the substrate, and from those end portions to detectors, so that reading, writing, focusing, and tracking operations may be performed. The waveguide systems include, e.g., polarization controllers and mode splitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.